Mercurial > hg > CbC > CbC_gcc
annotate gcc/tree-ssa-uninit.c @ 63:b7f97abdc517 gcc-4.6-20100522
update gcc from gcc-4.5.0 to gcc-4.6
author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
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date | Mon, 24 May 2010 12:47:05 +0900 |
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children | f6334be47118 |
rev | line source |
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63
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1 /* Predicate aware uninitialized variable warning. |
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2 Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2010 Free Software |
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3 Foundation, Inc. |
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4 Contributed by Xinliang David Li <davidxl@google.com> |
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5 |
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6 This file is part of GCC. |
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7 |
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8 GCC is free software; you can redistribute it and/or modify |
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9 it under the terms of the GNU General Public License as published by |
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10 the Free Software Foundation; either version 3, or (at your option) |
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11 any later version. |
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12 |
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13 GCC is distributed in the hope that it will be useful, |
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 GNU General Public License for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with GCC; see the file COPYING3. If not see |
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20 <http://www.gnu.org/licenses/>. */ |
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21 |
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22 #include "config.h" |
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23 #include "system.h" |
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24 #include "coretypes.h" |
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25 #include "tm.h" |
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26 #include "tree.h" |
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27 #include "flags.h" |
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28 #include "tm_p.h" |
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29 #include "langhooks.h" |
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30 #include "basic-block.h" |
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31 #include "output.h" |
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32 #include "expr.h" |
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33 #include "function.h" |
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34 #include "diagnostic.h" |
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35 #include "gimple-pretty-print.h" |
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36 #include "bitmap.h" |
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37 #include "pointer-set.h" |
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38 #include "tree-flow.h" |
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39 #include "gimple.h" |
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40 #include "tree-inline.h" |
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41 #include "timevar.h" |
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42 #include "hashtab.h" |
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43 #include "tree-dump.h" |
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44 #include "tree-pass.h" |
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45 #include "toplev.h" |
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46 #include "timevar.h" |
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47 |
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48 /* This implements the pass that does predicate aware warning on uses of |
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49 possibly uninitialized variables. The pass first collects the set of |
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50 possibly uninitialized SSA names. For each such name, it walks through |
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51 all its immediate uses. For each immediate use, it rebuilds the condition |
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52 expression (the predicate) that guards the use. The predicate is then |
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53 examined to see if the variable is always defined under that same condition. |
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54 This is done either by pruning the unrealizable paths that lead to the |
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55 default definitions or by checking if the predicate set that guards the |
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56 defining paths is a superset of the use predicate. */ |
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57 |
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58 |
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59 /* Pointer set of potentially undefined ssa names, i.e., |
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60 ssa names that are defined by phi with operands that |
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61 are not defined or potentially undefined. */ |
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62 static struct pointer_set_t *possibly_undefined_names = 0; |
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63 |
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64 /* Bit mask handling macros. */ |
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65 #define MASK_SET_BIT(mask, pos) mask |= (1 << pos) |
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66 #define MASK_TEST_BIT(mask, pos) (mask & (1 << pos)) |
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67 #define MASK_EMPTY(mask) (mask == 0) |
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68 |
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69 /* Returns the first bit position (starting from LSB) |
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70 in mask that is non zero. Returns -1 if the mask is empty. */ |
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71 static int |
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72 get_mask_first_set_bit (unsigned mask) |
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73 { |
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74 int pos = 0; |
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75 if (mask == 0) |
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76 return -1; |
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77 |
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78 while ((mask & (1 << pos)) == 0) |
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79 pos++; |
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80 |
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81 return pos; |
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82 } |
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83 #define MASK_FIRST_SET_BIT(mask) get_mask_first_set_bit (mask) |
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84 |
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85 |
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86 /* Return true if T, an SSA_NAME, has an undefined value. */ |
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87 |
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88 bool |
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89 ssa_undefined_value_p (tree t) |
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90 { |
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91 tree var = SSA_NAME_VAR (t); |
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92 |
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93 /* Parameters get their initial value from the function entry. */ |
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94 if (TREE_CODE (var) == PARM_DECL) |
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95 return false; |
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96 |
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97 /* Hard register variables get their initial value from the ether. */ |
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98 if (TREE_CODE (var) == VAR_DECL && DECL_HARD_REGISTER (var)) |
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99 return false; |
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100 |
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101 /* The value is undefined iff its definition statement is empty. */ |
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102 return (gimple_nop_p (SSA_NAME_DEF_STMT (t)) |
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103 || (possibly_undefined_names |
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104 && pointer_set_contains (possibly_undefined_names, t))); |
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105 } |
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106 |
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107 /* Checks if the operand OPND of PHI is defined by |
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108 another phi with one operand defined by this PHI, |
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109 but the rest operands are all defined. If yes, |
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110 returns true to skip this this operand as being |
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111 redundant. Can be enhanced to be more general. */ |
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112 |
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113 static bool |
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114 can_skip_redundant_opnd (tree opnd, gimple phi) |
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115 { |
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116 gimple op_def; |
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117 tree phi_def; |
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118 int i, n; |
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119 |
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120 phi_def = gimple_phi_result (phi); |
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121 op_def = SSA_NAME_DEF_STMT (opnd); |
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122 if (gimple_code (op_def) != GIMPLE_PHI) |
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123 return false; |
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124 n = gimple_phi_num_args (op_def); |
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125 for (i = 0; i < n; ++i) |
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126 { |
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127 tree op = gimple_phi_arg_def (op_def, i); |
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128 if (TREE_CODE (op) != SSA_NAME) |
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129 continue; |
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130 if (op != phi_def && ssa_undefined_value_p (op)) |
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131 return false; |
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132 } |
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133 |
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134 return true; |
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135 } |
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136 |
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137 /* Returns a bit mask holding the positions of arguments in PHI |
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138 that have empty (or possibly empty) definitions. */ |
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139 |
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140 static unsigned |
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141 compute_uninit_opnds_pos (gimple phi) |
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142 { |
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143 size_t i, n; |
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144 unsigned uninit_opnds = 0; |
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145 |
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146 n = gimple_phi_num_args (phi); |
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147 |
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148 for (i = 0; i < n; ++i) |
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149 { |
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150 tree op = gimple_phi_arg_def (phi, i); |
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151 if (TREE_CODE (op) == SSA_NAME |
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152 && ssa_undefined_value_p (op) |
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153 && !can_skip_redundant_opnd (op, phi)) |
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154 MASK_SET_BIT (uninit_opnds, i); |
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155 } |
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156 return uninit_opnds; |
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157 } |
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158 |
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159 /* Find the immediate postdominator PDOM of the specified |
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160 basic block BLOCK. */ |
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161 |
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162 static inline basic_block |
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163 find_pdom (basic_block block) |
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164 { |
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165 if (block == EXIT_BLOCK_PTR) |
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166 return EXIT_BLOCK_PTR; |
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167 else |
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168 { |
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169 basic_block bb |
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170 = get_immediate_dominator (CDI_POST_DOMINATORS, block); |
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171 if (! bb) |
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172 return EXIT_BLOCK_PTR; |
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173 return bb; |
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174 } |
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175 } |
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176 |
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177 /* Find the immediate DOM of the specified |
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178 basic block BLOCK. */ |
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179 |
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180 static inline basic_block |
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181 find_dom (basic_block block) |
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182 { |
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183 if (block == ENTRY_BLOCK_PTR) |
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184 return ENTRY_BLOCK_PTR; |
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185 else |
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186 { |
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187 basic_block bb = get_immediate_dominator (CDI_DOMINATORS, block); |
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188 if (! bb) |
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189 return ENTRY_BLOCK_PTR; |
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190 return bb; |
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191 } |
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192 } |
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193 |
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194 /* Returns true if BB1 is postdominating BB2 and BB1 is |
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195 not a loop exit bb. The loop exit bb check is simple and does |
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196 not cover all cases. */ |
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197 |
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198 static bool |
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199 is_non_loop_exit_postdominating (basic_block bb1, basic_block bb2) |
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200 { |
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201 if (!dominated_by_p (CDI_POST_DOMINATORS, bb2, bb1)) |
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202 return false; |
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203 |
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204 if (single_pred_p (bb1) && !single_succ_p (bb2)) |
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205 return false; |
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206 |
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207 return true; |
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208 } |
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209 |
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210 /* Find the closest postdominator of a specified BB, which is control |
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211 equivalent to BB. */ |
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212 |
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213 static inline basic_block |
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214 find_control_equiv_block (basic_block bb) |
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215 { |
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216 basic_block pdom; |
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217 |
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218 pdom = find_pdom (bb); |
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219 |
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220 /* Skip the postdominating bb that is also loop exit. */ |
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221 if (!is_non_loop_exit_postdominating (pdom, bb)) |
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222 return NULL; |
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223 |
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224 if (dominated_by_p (CDI_DOMINATORS, pdom, bb)) |
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225 return pdom; |
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226 |
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227 return NULL; |
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228 } |
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229 |
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230 #define MAX_NUM_CHAINS 8 |
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231 #define MAX_CHAIN_LEN 5 |
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232 |
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233 /* Computes the control dependence chains (paths of edges) |
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234 for DEP_BB up to the dominating basic block BB (the head node of a |
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235 chain should be dominated by it). CD_CHAINS is pointer to a |
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236 dynamic array holding the result chains. CUR_CD_CHAIN is the current |
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237 chain being computed. *NUM_CHAINS is total number of chains. The |
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238 function returns true if the information is successfully computed, |
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239 return false if there is no control dependence or not computed. */ |
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240 |
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241 static bool |
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242 compute_control_dep_chain (basic_block bb, basic_block dep_bb, |
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243 VEC(edge, heap) **cd_chains, |
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244 size_t *num_chains, |
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245 VEC(edge, heap) **cur_cd_chain) |
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246 { |
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247 edge_iterator ei; |
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248 edge e; |
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249 size_t i; |
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250 bool found_cd_chain = false; |
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251 size_t cur_chain_len = 0; |
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252 |
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253 if (EDGE_COUNT (bb->succs) < 2) |
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254 return false; |
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255 |
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256 /* Could use a set instead. */ |
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257 cur_chain_len = VEC_length (edge, *cur_cd_chain); |
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258 if (cur_chain_len > MAX_CHAIN_LEN) |
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259 return false; |
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260 |
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261 for (i = 0; i < cur_chain_len; i++) |
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262 { |
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263 edge e = VEC_index (edge, *cur_cd_chain, i); |
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264 /* cycle detected. */ |
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265 if (e->src == bb) |
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266 return false; |
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267 } |
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268 |
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269 FOR_EACH_EDGE (e, ei, bb->succs) |
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270 { |
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271 basic_block cd_bb; |
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272 if (e->flags & (EDGE_FAKE | EDGE_ABNORMAL)) |
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273 continue; |
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274 |
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275 cd_bb = e->dest; |
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276 VEC_safe_push (edge, heap, *cur_cd_chain, e); |
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277 while (!is_non_loop_exit_postdominating (cd_bb, bb)) |
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278 { |
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279 if (cd_bb == dep_bb) |
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280 { |
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281 /* Found a direct control dependence. */ |
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282 if (*num_chains < MAX_NUM_CHAINS) |
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283 { |
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284 cd_chains[*num_chains] |
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285 = VEC_copy (edge, heap, *cur_cd_chain); |
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286 (*num_chains)++; |
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287 } |
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288 found_cd_chain = true; |
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289 /* check path from next edge. */ |
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290 break; |
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291 } |
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292 |
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293 /* Now check if DEP_BB is indirectly control dependent on BB. */ |
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294 if (compute_control_dep_chain (cd_bb, dep_bb, cd_chains, |
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295 num_chains, cur_cd_chain)) |
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296 { |
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297 found_cd_chain = true; |
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298 break; |
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299 } |
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300 |
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301 cd_bb = find_pdom (cd_bb); |
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302 if (cd_bb == EXIT_BLOCK_PTR) |
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303 break; |
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304 } |
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305 VEC_pop (edge, *cur_cd_chain); |
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306 gcc_assert (VEC_length (edge, *cur_cd_chain) == cur_chain_len); |
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307 } |
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308 gcc_assert (VEC_length (edge, *cur_cd_chain) == cur_chain_len); |
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309 |
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310 return found_cd_chain; |
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311 } |
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312 |
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313 typedef struct use_pred_info |
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314 { |
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315 gimple cond; |
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316 bool invert; |
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317 } *use_pred_info_t; |
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318 |
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319 DEF_VEC_P(use_pred_info_t); |
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320 DEF_VEC_ALLOC_P(use_pred_info_t, heap); |
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321 |
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322 |
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323 /* Converts the chains of control dependence edges into a set of |
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324 predicates. A control dependence chain is represented by a vector |
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325 edges. DEP_CHAINS points to an array of dependence chains. |
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326 NUM_CHAINS is the size of the chain array. One edge in a dependence |
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327 chain is mapped to predicate expression represented by use_pred_info_t |
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328 type. One dependence chain is converted to a composite predicate that |
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329 is the result of AND operation of use_pred_info_t mapped to each edge. |
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330 A composite predicate is presented by a vector of use_pred_info_t. On |
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331 return, *PREDS points to the resulting array of composite predicates. |
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332 *NUM_PREDS is the number of composite predictes. */ |
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333 |
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334 static bool |
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335 convert_control_dep_chain_into_preds (VEC(edge, heap) **dep_chains, |
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336 size_t num_chains, |
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337 VEC(use_pred_info_t, heap) ***preds, |
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338 size_t *num_preds) |
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339 { |
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340 bool has_valid_pred = false; |
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341 size_t i, j; |
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342 if (num_chains == 0 || num_chains >= MAX_NUM_CHAINS) |
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343 return false; |
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344 |
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345 /* Now convert CD chains into predicates */ |
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346 has_valid_pred = true; |
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347 |
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348 /* Now convert the control dep chain into a set |
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349 of predicates. */ |
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350 *preds = XCNEWVEC (VEC(use_pred_info_t, heap) *, |
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351 num_chains); |
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352 *num_preds = num_chains; |
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353 |
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354 for (i = 0; i < num_chains; i++) |
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355 { |
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356 VEC(edge, heap) *one_cd_chain = dep_chains[i]; |
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357 for (j = 0; j < VEC_length (edge, one_cd_chain); j++) |
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358 { |
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359 gimple cond_stmt; |
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360 gimple_stmt_iterator gsi; |
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361 basic_block guard_bb; |
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362 use_pred_info_t one_pred; |
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363 edge e; |
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364 |
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365 e = VEC_index (edge, one_cd_chain, j); |
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366 guard_bb = e->src; |
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367 gsi = gsi_last_bb (guard_bb); |
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368 if (gsi_end_p (gsi)) |
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369 { |
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370 has_valid_pred = false; |
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371 break; |
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372 } |
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373 cond_stmt = gsi_stmt (gsi); |
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374 if (gimple_code (cond_stmt) == GIMPLE_CALL |
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375 && EDGE_COUNT (e->src->succs) >= 2) |
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376 { |
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377 /* Ignore EH edge. Can add assertion |
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378 on the other edge's flag. */ |
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379 continue; |
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380 } |
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381 /* Skip if there is essentially one succesor. */ |
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382 if (EDGE_COUNT (e->src->succs) == 2) |
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383 { |
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384 edge e1; |
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385 edge_iterator ei1; |
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386 bool skip = false; |
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387 |
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388 FOR_EACH_EDGE (e1, ei1, e->src->succs) |
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389 { |
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390 if (EDGE_COUNT (e1->dest->succs) == 0) |
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391 { |
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392 skip = true; |
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393 break; |
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394 } |
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395 } |
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396 if (skip) |
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397 continue; |
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398 } |
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399 if (gimple_code (cond_stmt) != GIMPLE_COND) |
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400 { |
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401 has_valid_pred = false; |
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402 break; |
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403 } |
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404 one_pred = XNEW (struct use_pred_info); |
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405 one_pred->cond = cond_stmt; |
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406 one_pred->invert = !!(e->flags & EDGE_FALSE_VALUE); |
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407 VEC_safe_push (use_pred_info_t, heap, (*preds)[i], one_pred); |
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408 } |
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409 |
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410 if (!has_valid_pred) |
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411 break; |
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412 } |
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413 return has_valid_pred; |
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414 } |
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415 |
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416 /* Computes all control dependence chains for USE_BB. The control |
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417 dependence chains are then converted to an array of composite |
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418 predicates pointed to by PREDS. PHI_BB is the basic block of |
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419 the phi whose result is used in USE_BB. */ |
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420 |
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421 static bool |
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422 find_predicates (VEC(use_pred_info_t, heap) ***preds, |
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423 size_t *num_preds, |
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424 basic_block phi_bb, |
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425 basic_block use_bb) |
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426 { |
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427 size_t num_chains = 0, i; |
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428 VEC(edge, heap) **dep_chains = 0; |
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429 VEC(edge, heap) *cur_chain = 0; |
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430 bool has_valid_pred = false; |
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431 basic_block cd_root = 0; |
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432 |
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433 dep_chains = XCNEWVEC (VEC(edge, heap) *, MAX_NUM_CHAINS); |
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434 |
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435 /* First find the closest bb that is control equivalent to PHI_BB |
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436 that also dominates USE_BB. */ |
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437 cd_root = phi_bb; |
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438 while (dominated_by_p (CDI_DOMINATORS, use_bb, cd_root)) |
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439 { |
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440 basic_block ctrl_eq_bb = find_control_equiv_block (cd_root); |
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441 if (ctrl_eq_bb && dominated_by_p (CDI_DOMINATORS, use_bb, ctrl_eq_bb)) |
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442 cd_root = ctrl_eq_bb; |
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443 else |
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444 break; |
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445 } |
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446 |
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447 compute_control_dep_chain (cd_root, use_bb, |
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448 dep_chains, &num_chains, |
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449 &cur_chain); |
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450 |
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451 has_valid_pred |
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452 = convert_control_dep_chain_into_preds (dep_chains, |
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453 num_chains, |
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454 preds, |
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455 num_preds); |
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456 /* Free individual chain */ |
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457 VEC_free (edge, heap, cur_chain); |
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458 for (i = 0; i < num_chains; i++) |
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459 VEC_free (edge, heap, dep_chains[i]); |
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460 free (dep_chains); |
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461 return has_valid_pred; |
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462 } |
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463 |
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464 /* Computes the set of incoming edges of PHI that have non empty |
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465 definitions of a phi chain. The collection will be done |
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466 recursively on operands that are defined by phis. CD_ROOT |
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467 is the control dependence root. *EDGES holds the result, and |
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468 VISITED_PHIS is a pointer set for detecting cycles. */ |
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469 |
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470 static void |
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471 collect_phi_def_edges (gimple phi, basic_block cd_root, |
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472 VEC(edge, heap) **edges, |
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473 struct pointer_set_t *visited_phis) |
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474 { |
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475 size_t i, n; |
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476 edge opnd_edge; |
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477 tree opnd; |
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|
478 |
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479 if (pointer_set_insert (visited_phis, phi)) |
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480 return; |
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481 |
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482 n = gimple_phi_num_args (phi); |
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483 for (i = 0; i < n; i++) |
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484 { |
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485 opnd_edge = gimple_phi_arg_edge (phi, i); |
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486 opnd = gimple_phi_arg_def (phi, i); |
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487 |
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488 if (TREE_CODE (opnd) != SSA_NAME |
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489 || !ssa_undefined_value_p (opnd)) |
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490 VEC_safe_push (edge, heap, *edges, opnd_edge); |
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491 else |
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|
492 { |
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493 gimple def = SSA_NAME_DEF_STMT (opnd); |
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494 if (gimple_code (def) == GIMPLE_PHI |
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495 && dominated_by_p (CDI_DOMINATORS, |
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496 gimple_bb (def), cd_root)) |
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497 collect_phi_def_edges (def, cd_root, edges, |
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498 visited_phis); |
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|
499 } |
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|
500 } |
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|
501 } |
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|
502 |
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503 /* For each use edge of PHI, computes all control dependence chains. |
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504 The control dependence chains are then converted to an array of |
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505 composite predicates pointed to by PREDS. */ |
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|
506 |
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507 static bool |
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508 find_def_preds (VEC(use_pred_info_t, heap) ***preds, |
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509 size_t *num_preds, gimple phi) |
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|
510 { |
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511 size_t num_chains = 0, i, n; |
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512 VEC(edge, heap) **dep_chains = 0; |
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513 VEC(edge, heap) *cur_chain = 0; |
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514 VEC(edge, heap) *def_edges = 0; |
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515 bool has_valid_pred = false; |
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516 basic_block phi_bb, cd_root = 0; |
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517 struct pointer_set_t *visited_phis; |
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|
518 |
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519 dep_chains = XCNEWVEC (VEC(edge, heap) *, MAX_NUM_CHAINS); |
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changeset
|
520 |
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521 phi_bb = gimple_bb (phi); |
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changeset
|
522 /* First find the closest dominating bb to be |
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|
523 the control dependence root */ |
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|
524 cd_root = find_dom (phi_bb); |
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|
525 if (!cd_root) |
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|
526 return false; |
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changeset
|
527 |
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|
528 visited_phis = pointer_set_create (); |
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|
529 collect_phi_def_edges (phi, cd_root, &def_edges, visited_phis); |
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|
530 pointer_set_destroy (visited_phis); |
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changeset
|
531 |
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changeset
|
532 n = VEC_length (edge, def_edges); |
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|
533 if (n == 0) |
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|
534 return false; |
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changeset
|
535 |
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changeset
|
536 for (i = 0; i < n; i++) |
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changeset
|
537 { |
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changeset
|
538 size_t prev_nc, j; |
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changeset
|
539 edge opnd_edge; |
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changeset
|
540 |
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changeset
|
541 opnd_edge = VEC_index (edge, def_edges, i); |
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changeset
|
542 prev_nc = num_chains; |
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changeset
|
543 compute_control_dep_chain (cd_root, opnd_edge->src, |
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changeset
|
544 dep_chains, &num_chains, |
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changeset
|
545 &cur_chain); |
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changeset
|
546 /* Free individual chain */ |
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changeset
|
547 VEC_free (edge, heap, cur_chain); |
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changeset
|
548 cur_chain = 0; |
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changeset
|
549 |
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changeset
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550 /* Now update the newly added chains with |
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551 the phi operand edge: */ |
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552 if (EDGE_COUNT (opnd_edge->src->succs) > 1) |
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553 { |
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554 if (prev_nc == num_chains |
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555 && num_chains < MAX_NUM_CHAINS) |
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556 num_chains++; |
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557 for (j = prev_nc; j < num_chains; j++) |
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558 { |
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559 VEC_safe_push (edge, heap, dep_chains[j], opnd_edge); |
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560 } |
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561 } |
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562 } |
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563 |
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564 has_valid_pred |
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565 = convert_control_dep_chain_into_preds (dep_chains, |
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566 num_chains, |
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567 preds, |
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568 num_preds); |
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569 for (i = 0; i < num_chains; i++) |
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570 VEC_free (edge, heap, dep_chains[i]); |
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571 free (dep_chains); |
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572 return has_valid_pred; |
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573 } |
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574 |
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575 /* Dumps the predicates (PREDS) for USESTMT. */ |
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576 |
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577 static void |
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578 dump_predicates (gimple usestmt, size_t num_preds, |
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579 VEC(use_pred_info_t, heap) **preds, |
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580 const char* msg) |
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581 { |
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582 size_t i, j; |
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583 VEC(use_pred_info_t, heap) *one_pred_chain; |
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584 fprintf (dump_file, msg); |
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585 print_gimple_stmt (dump_file, usestmt, 0, 0); |
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586 fprintf (dump_file, "is guarded by :\n"); |
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587 /* do some dumping here: */ |
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588 for (i = 0; i < num_preds; i++) |
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589 { |
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590 size_t np; |
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591 |
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592 one_pred_chain = preds[i]; |
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593 np = VEC_length (use_pred_info_t, one_pred_chain); |
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|
594 |
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595 for (j = 0; j < np; j++) |
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596 { |
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597 use_pred_info_t one_pred |
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598 = VEC_index (use_pred_info_t, one_pred_chain, j); |
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599 if (one_pred->invert) |
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600 fprintf (dump_file, " (.NOT.) "); |
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601 print_gimple_stmt (dump_file, one_pred->cond, 0, 0); |
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602 if (j < np - 1) |
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603 fprintf (dump_file, "(.AND.)\n"); |
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|
604 } |
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605 if (i < num_preds - 1) |
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|
606 fprintf (dump_file, "(.OR.)\n"); |
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|
607 } |
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|
608 } |
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|
609 |
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610 /* Destroys the predicate set *PREDS. */ |
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|
611 |
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|
612 static void |
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613 destroy_predicate_vecs (size_t n, |
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614 VEC(use_pred_info_t, heap) ** preds) |
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|
615 { |
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|
616 size_t i, j; |
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617 for (i = 0; i < n; i++) |
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|
618 { |
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|
619 for (j = 0; j < VEC_length (use_pred_info_t, preds[i]); j++) |
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620 free (VEC_index (use_pred_info_t, preds[i], j)); |
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|
621 VEC_free (use_pred_info_t, heap, preds[i]); |
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changeset
|
622 } |
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changeset
|
623 free (preds); |
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changeset
|
624 } |
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changeset
|
625 |
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changeset
|
626 |
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changeset
|
627 /* Computes the 'normalized' conditional code with operand |
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diff
changeset
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628 swapping and condition inversion. */ |
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changeset
|
629 |
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630 static enum tree_code |
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631 get_cmp_code (enum tree_code orig_cmp_code, |
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632 bool swap_cond, bool invert) |
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changeset
|
633 { |
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634 enum tree_code tc = orig_cmp_code; |
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changeset
|
635 |
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changeset
|
636 if (swap_cond) |
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637 tc = swap_tree_comparison (orig_cmp_code); |
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638 if (invert) |
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639 tc = invert_tree_comparison (tc, false); |
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changeset
|
640 |
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changeset
|
641 switch (tc) |
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|
642 { |
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643 case LT_EXPR: |
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644 case LE_EXPR: |
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645 case GT_EXPR: |
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646 case GE_EXPR: |
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647 case EQ_EXPR: |
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648 case NE_EXPR: |
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649 break; |
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650 default: |
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651 return ERROR_MARK; |
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|
652 } |
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653 return tc; |
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|
654 } |
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|
655 |
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656 /* Returns true if VAL falls in the range defined by BOUNDARY and CMPC, i.e. |
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changeset
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657 all values in the range satisfies (x CMPC BOUNDARY) == true. */ |
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|
658 |
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changeset
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659 static bool |
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changeset
|
660 is_value_included_in (tree val, tree boundary, enum tree_code cmpc) |
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661 { |
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662 bool inverted = false; |
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663 bool is_unsigned; |
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664 bool result; |
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|
665 |
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666 /* Only handle integer constant here. */ |
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667 if (TREE_CODE (val) != INTEGER_CST |
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668 || TREE_CODE (boundary) != INTEGER_CST) |
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669 return true; |
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670 |
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671 is_unsigned = TYPE_UNSIGNED (TREE_TYPE (val)); |
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672 |
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673 if (cmpc == GE_EXPR || cmpc == GT_EXPR |
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674 || cmpc == NE_EXPR) |
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675 { |
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676 cmpc = invert_tree_comparison (cmpc, false); |
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677 inverted = true; |
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678 } |
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679 |
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680 if (is_unsigned) |
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681 { |
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682 if (cmpc == EQ_EXPR) |
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683 result = tree_int_cst_equal (val, boundary); |
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684 else if (cmpc == LT_EXPR) |
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685 result = INT_CST_LT_UNSIGNED (val, boundary); |
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686 else |
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687 { |
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688 gcc_assert (cmpc == LE_EXPR); |
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689 result = (tree_int_cst_equal (val, boundary) |
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690 || INT_CST_LT_UNSIGNED (val, boundary)); |
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691 } |
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|
692 } |
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693 else |
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|
694 { |
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695 if (cmpc == EQ_EXPR) |
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696 result = tree_int_cst_equal (val, boundary); |
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697 else if (cmpc == LT_EXPR) |
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698 result = INT_CST_LT (val, boundary); |
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699 else |
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|
700 { |
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|
701 gcc_assert (cmpc == LE_EXPR); |
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|
702 result = (tree_int_cst_equal (val, boundary) |
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|
703 || INT_CST_LT (val, boundary)); |
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|
704 } |
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|
705 } |
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|
706 |
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|
707 if (inverted) |
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changeset
|
708 result ^= 1; |
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|
709 |
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changeset
|
710 return result; |
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|
711 } |
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changeset
|
712 |
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parents:
diff
changeset
|
713 /* Returns true if PRED is common among all the predicate |
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changeset
|
714 chains (PREDS) (and therefore can be factored out). |
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changeset
|
715 NUM_PRED_CHAIN is the size of array PREDS. */ |
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changeset
|
716 |
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changeset
|
717 static bool |
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changeset
|
718 find_matching_predicate_in_rest_chains (use_pred_info_t pred, |
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changeset
|
719 VEC(use_pred_info_t, heap) **preds, |
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changeset
|
720 size_t num_pred_chains) |
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parents:
diff
changeset
|
721 { |
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changeset
|
722 size_t i, j, n; |
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parents:
diff
changeset
|
723 |
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parents:
diff
changeset
|
724 /* trival case */ |
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parents:
diff
changeset
|
725 if (num_pred_chains == 1) |
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parents:
diff
changeset
|
726 return true; |
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parents:
diff
changeset
|
727 |
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parents:
diff
changeset
|
728 for (i = 1; i < num_pred_chains; i++) |
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parents:
diff
changeset
|
729 { |
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parents:
diff
changeset
|
730 bool found = false; |
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changeset
|
731 VEC(use_pred_info_t, heap) *one_chain = preds[i]; |
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parents:
diff
changeset
|
732 n = VEC_length (use_pred_info_t, one_chain); |
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diff
changeset
|
733 for (j = 0; j < n; j++) |
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diff
changeset
|
734 { |
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parents:
diff
changeset
|
735 use_pred_info_t pred2 |
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changeset
|
736 = VEC_index (use_pred_info_t, one_chain, j); |
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diff
changeset
|
737 /* can relax the condition comparison to not |
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parents:
diff
changeset
|
738 use address comparison. However, the most common |
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parents:
diff
changeset
|
739 case is that multiple control dependent paths share |
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diff
changeset
|
740 a common path prefix, so address comparison should |
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diff
changeset
|
741 be ok. */ |
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diff
changeset
|
742 |
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parents:
diff
changeset
|
743 if (pred2->cond == pred->cond |
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parents:
diff
changeset
|
744 && pred2->invert == pred->invert) |
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parents:
diff
changeset
|
745 { |
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changeset
|
746 found = true; |
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parents:
diff
changeset
|
747 break; |
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parents:
diff
changeset
|
748 } |
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parents:
diff
changeset
|
749 } |
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parents:
diff
changeset
|
750 if (!found) |
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diff
changeset
|
751 return false; |
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diff
changeset
|
752 } |
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diff
changeset
|
753 return true; |
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parents:
diff
changeset
|
754 } |
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diff
changeset
|
755 |
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parents:
diff
changeset
|
756 /* Forward declaration. */ |
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parents:
diff
changeset
|
757 static bool |
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parents:
diff
changeset
|
758 is_use_properly_guarded (gimple use_stmt, |
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parents:
diff
changeset
|
759 basic_block use_bb, |
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parents:
diff
changeset
|
760 gimple phi, |
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parents:
diff
changeset
|
761 unsigned uninit_opnds, |
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parents:
diff
changeset
|
762 struct pointer_set_t *visited_phis); |
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parents:
diff
changeset
|
763 |
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parents:
diff
changeset
|
764 /* A helper function that determines if the predicate set |
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parents:
diff
changeset
|
765 of the use is not overlapping with that of the uninit paths. |
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parents:
diff
changeset
|
766 The most common senario of guarded use is in Example 1: |
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parents:
diff
changeset
|
767 Example 1: |
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parents:
diff
changeset
|
768 if (some_cond) |
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parents:
diff
changeset
|
769 { |
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parents:
diff
changeset
|
770 x = ...; |
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parents:
diff
changeset
|
771 flag = true; |
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772 } |
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773 |
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774 ... some code ... |
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775 |
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776 if (flag) |
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777 use (x); |
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778 |
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779 The real world examples are usually more complicated, but similar |
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780 and usually result from inlining: |
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781 |
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782 bool init_func (int * x) |
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783 { |
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784 if (some_cond) |
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785 return false; |
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786 *x = .. |
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787 return true; |
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788 } |
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789 |
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790 void foo(..) |
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791 { |
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792 int x; |
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793 |
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794 if (!init_func(&x)) |
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795 return; |
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796 |
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797 .. some_code ... |
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798 use (x); |
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799 } |
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800 |
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801 Another possible use scenario is in the following trivial example: |
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802 |
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803 Example 2: |
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804 if (n > 0) |
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805 x = 1; |
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806 ... |
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807 if (n > 0) |
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808 { |
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809 if (m < 2) |
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810 .. = x; |
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811 } |
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812 |
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813 Predicate analysis needs to compute the composite predicate: |
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814 |
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815 1) 'x' use predicate: (n > 0) .AND. (m < 2) |
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816 2) 'x' default value (non-def) predicate: .NOT. (n > 0) |
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817 (the predicate chain for phi operand defs can be computed |
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818 starting from a bb that is control equivalent to the phi's |
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819 bb and is dominating the operand def.) |
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820 |
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821 and check overlapping: |
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822 (n > 0) .AND. (m < 2) .AND. (.NOT. (n > 0)) |
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823 <==> false |
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824 |
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825 This implementation provides framework that can handle |
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826 scenarios. (Note that many simple cases are handled properly |
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827 without the predicate analysis -- this is due to jump threading |
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828 transformation which eliminates the merge point thus makes |
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829 path sensitive analysis unnecessary.) |
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830 |
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831 NUM_PREDS is the number is the number predicate chains, PREDS is |
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832 the array of chains, PHI is the phi node whose incoming (undefined) |
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833 paths need to be pruned, and UNINIT_OPNDS is the bitmap holding |
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834 uninit operand positions. VISITED_PHIS is the pointer set of phi |
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835 stmts being checked. */ |
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|
836 |
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|
837 |
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838 static bool |
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839 use_pred_not_overlap_with_undef_path_pred ( |
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840 size_t num_preds, |
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841 VEC(use_pred_info_t, heap) **preds, |
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842 gimple phi, unsigned uninit_opnds, |
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843 struct pointer_set_t *visited_phis) |
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|
844 { |
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845 unsigned int i, n; |
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846 gimple flag_def = 0; |
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847 tree boundary_cst = 0; |
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848 enum tree_code cmp_code; |
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849 bool swap_cond = false; |
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850 bool invert = false; |
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851 VEC(use_pred_info_t, heap) *the_pred_chain; |
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|
852 |
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853 gcc_assert (num_preds > 0); |
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854 /* Find within the common prefix of multiple predicate chains |
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855 a predicate that is a comparison of a flag variable against |
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856 a constant. */ |
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857 the_pred_chain = preds[0]; |
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858 n = VEC_length (use_pred_info_t, the_pred_chain); |
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859 for (i = 0; i < n; i++) |
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|
860 { |
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861 gimple cond; |
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862 tree cond_lhs, cond_rhs, flag = 0; |
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|
863 |
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864 use_pred_info_t the_pred |
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865 = VEC_index (use_pred_info_t, the_pred_chain, i); |
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|
866 |
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867 cond = the_pred->cond; |
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868 invert = the_pred->invert; |
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869 cond_lhs = gimple_cond_lhs (cond); |
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870 cond_rhs = gimple_cond_rhs (cond); |
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871 cmp_code = gimple_cond_code (cond); |
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|
872 |
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873 if (cond_lhs != NULL_TREE && TREE_CODE (cond_lhs) == SSA_NAME |
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874 && cond_rhs != NULL_TREE && is_gimple_constant (cond_rhs)) |
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875 { |
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876 boundary_cst = cond_rhs; |
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877 flag = cond_lhs; |
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878 } |
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879 else if (cond_rhs != NULL_TREE && TREE_CODE (cond_rhs) == SSA_NAME |
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880 && cond_lhs != NULL_TREE && is_gimple_constant (cond_lhs)) |
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881 { |
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882 boundary_cst = cond_lhs; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
883 flag = cond_rhs; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
884 swap_cond = true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
885 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
886 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
887 if (!flag) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
888 continue; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
889 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
890 flag_def = SSA_NAME_DEF_STMT (flag); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
891 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
892 if (!flag_def) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
893 continue; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
894 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
895 if ((gimple_code (flag_def) == GIMPLE_PHI) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
896 && (gimple_bb (flag_def) == gimple_bb (phi)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
897 && find_matching_predicate_in_rest_chains ( |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
898 the_pred, preds, num_preds)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
899 break; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
900 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
901 flag_def = 0; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
902 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
903 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
904 if (!flag_def) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
905 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
906 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
907 /* Now check all the uninit incoming edge has a constant flag value |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
908 that is in conflict with the use guard/predicate. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
909 cmp_code = get_cmp_code (cmp_code, swap_cond, invert); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
910 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
911 if (cmp_code == ERROR_MARK) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
912 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
913 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
914 for (i = 0; i < sizeof (unsigned); i++) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
915 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
916 tree flag_arg; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
917 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
918 if (!MASK_TEST_BIT (uninit_opnds, i)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
919 continue; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
920 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
921 flag_arg = gimple_phi_arg_def (flag_def, i); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
922 if (!is_gimple_constant (flag_arg)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
923 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
924 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
925 /* Now check if the constant is in the guarded range. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
926 if (is_value_included_in (flag_arg, boundary_cst, cmp_code)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
927 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
928 tree opnd; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
929 gimple opnd_def; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
930 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
931 /* Now that we know that this undefined edge is not |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
932 pruned. If the operand is defined by another phi, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
933 we can further prune the incoming edges of that |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
934 phi by checking the predicates of this operands. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
935 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
936 opnd = gimple_phi_arg_def (phi, i); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
937 opnd_def = SSA_NAME_DEF_STMT (opnd); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
938 if (gimple_code (opnd_def) == GIMPLE_PHI) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
939 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
940 edge opnd_edge; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
941 unsigned uninit_opnds2 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
942 = compute_uninit_opnds_pos (opnd_def); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
943 gcc_assert (!MASK_EMPTY (uninit_opnds2)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
944 opnd_edge = gimple_phi_arg_edge (phi, i); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
945 if (!is_use_properly_guarded (phi, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
946 opnd_edge->src, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
947 opnd_def, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
948 uninit_opnds2, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
949 visited_phis)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
950 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
951 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
952 else |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
953 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
954 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
955 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
956 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
957 return true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
958 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
959 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
960 /* Returns true if TC is AND or OR */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
961 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
962 static inline bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
963 is_and_or_or (enum tree_code tc, tree typ) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
964 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
965 return (tc == TRUTH_AND_EXPR |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
966 || tc == TRUTH_OR_EXPR |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
967 || tc == BIT_IOR_EXPR |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
968 || (tc == BIT_AND_EXPR |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
969 && (typ == 0 || TREE_CODE (typ) == BOOLEAN_TYPE))); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
970 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
971 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
972 typedef struct norm_cond |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
973 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
974 VEC(gimple, heap) *conds; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
975 enum tree_code cond_code; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
976 bool invert; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
977 } *norm_cond_t; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
978 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
979 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
980 /* Normalizes gimple condition COND. The normalization follows |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
981 UD chains to form larger condition expression trees. NORM_COND |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
982 holds the normalized result. COND_CODE is the logical opcode |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
983 (AND or OR) of the normalized tree. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
984 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
985 static void |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
986 normalize_cond_1 (gimple cond, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
987 norm_cond_t norm_cond, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
988 enum tree_code cond_code) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
989 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
990 enum gimple_code gc; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
991 enum tree_code cur_cond_code; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
992 tree rhs1, rhs2; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
993 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
994 gc = gimple_code (cond); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
995 if (gc != GIMPLE_ASSIGN) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
996 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
997 VEC_safe_push (gimple, heap, norm_cond->conds, cond); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
998 return; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
999 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1000 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1001 cur_cond_code = gimple_assign_rhs_code (cond); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1002 rhs1 = gimple_assign_rhs1 (cond); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1003 rhs2 = gimple_assign_rhs2 (cond); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1004 if (cur_cond_code == NE_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1005 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1006 if (integer_zerop (rhs2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1007 && (TREE_CODE (rhs1) == SSA_NAME)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1008 normalize_cond_1 ( |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1009 SSA_NAME_DEF_STMT (rhs1), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1010 norm_cond, cond_code); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1011 else if (integer_zerop (rhs1) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1012 && (TREE_CODE (rhs2) == SSA_NAME)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1013 normalize_cond_1 ( |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1014 SSA_NAME_DEF_STMT (rhs2), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1015 norm_cond, cond_code); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1016 else |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1017 VEC_safe_push (gimple, heap, norm_cond->conds, cond); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1018 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1019 return; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1020 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1021 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1022 if (is_and_or_or (cur_cond_code, TREE_TYPE (rhs1)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1023 && (cond_code == cur_cond_code || cond_code == ERROR_MARK) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1024 && (TREE_CODE (rhs1) == SSA_NAME && TREE_CODE (rhs2) == SSA_NAME)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1025 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1026 normalize_cond_1 (SSA_NAME_DEF_STMT (rhs1), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1027 norm_cond, cur_cond_code); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1028 normalize_cond_1 (SSA_NAME_DEF_STMT (rhs2), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1029 norm_cond, cur_cond_code); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1030 norm_cond->cond_code = cur_cond_code; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1031 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1032 else |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1033 VEC_safe_push (gimple, heap, norm_cond->conds, cond); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1034 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1035 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1036 /* See normalize_cond_1 for details. INVERT is a flag to indicate |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1037 if COND needs to be inverted or not. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1038 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1039 static void |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1040 normalize_cond (gimple cond, norm_cond_t norm_cond, bool invert) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1041 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1042 enum tree_code cond_code; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1043 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1044 norm_cond->cond_code = ERROR_MARK; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1045 norm_cond->invert = false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1046 norm_cond->conds = NULL; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1047 gcc_assert (gimple_code (cond) == GIMPLE_COND); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1048 cond_code = gimple_cond_code (cond); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1049 if (invert) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1050 cond_code = invert_tree_comparison (cond_code, false); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1051 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1052 if (cond_code == NE_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1053 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1054 if (integer_zerop (gimple_cond_rhs (cond)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1055 && (TREE_CODE (gimple_cond_lhs (cond)) == SSA_NAME)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1056 normalize_cond_1 ( |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1057 SSA_NAME_DEF_STMT (gimple_cond_lhs (cond)), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1058 norm_cond, ERROR_MARK); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1059 else if (integer_zerop (gimple_cond_lhs (cond)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1060 && (TREE_CODE (gimple_cond_rhs (cond)) == SSA_NAME)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1061 normalize_cond_1 ( |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1062 SSA_NAME_DEF_STMT (gimple_cond_rhs (cond)), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1063 norm_cond, ERROR_MARK); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1064 else |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1065 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1066 VEC_safe_push (gimple, heap, norm_cond->conds, cond); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1067 norm_cond->invert = invert; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1068 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1069 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1070 else |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1071 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1072 VEC_safe_push (gimple, heap, norm_cond->conds, cond); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1073 norm_cond->invert = invert; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1074 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1075 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1076 gcc_assert (VEC_length (gimple, norm_cond->conds) == 1 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1077 || is_and_or_or (norm_cond->cond_code, NULL)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1078 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1079 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1080 /* Returns true if the domain for condition COND1 is a subset of |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1081 COND2. REVERSE is a flag. when it is true the function checks |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1082 if COND1 is a superset of COND2. INVERT1 and INVERT2 are flags |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1083 to indicate if COND1 and COND2 need to be inverted or not. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1084 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1085 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1086 is_gcond_subset_of (gimple cond1, bool invert1, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1087 gimple cond2, bool invert2, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1088 bool reverse) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1089 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1090 enum gimple_code gc1, gc2; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1091 enum tree_code cond1_code, cond2_code; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1092 gimple tmp; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1093 tree cond1_lhs, cond1_rhs, cond2_lhs, cond2_rhs; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1094 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1095 /* Take the short cut. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1096 if (cond1 == cond2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1097 return true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1098 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1099 if (reverse) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1100 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1101 tmp = cond1; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1102 cond1 = cond2; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1103 cond2 = tmp; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1104 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1105 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1106 gc1 = gimple_code (cond1); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1107 gc2 = gimple_code (cond2); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1108 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1109 if ((gc1 != GIMPLE_ASSIGN && gc1 != GIMPLE_COND) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1110 || (gc2 != GIMPLE_ASSIGN && gc2 != GIMPLE_COND)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1111 return cond1 == cond2; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1112 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1113 cond1_code = ((gc1 == GIMPLE_ASSIGN) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1114 ? gimple_assign_rhs_code (cond1) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1115 : gimple_cond_code (cond1)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1116 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1117 cond2_code = ((gc2 == GIMPLE_ASSIGN) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1118 ? gimple_assign_rhs_code (cond2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1119 : gimple_cond_code (cond2)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1120 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1121 if (TREE_CODE_CLASS (cond1_code) != tcc_comparison |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1122 || TREE_CODE_CLASS (cond2_code) != tcc_comparison) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1123 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1124 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1125 if (invert1) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1126 cond1_code = invert_tree_comparison (cond1_code, false); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1127 if (invert2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1128 cond2_code = invert_tree_comparison (cond2_code, false); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1129 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1130 cond1_lhs = ((gc1 == GIMPLE_ASSIGN) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1131 ? gimple_assign_rhs1 (cond1) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1132 : gimple_cond_lhs (cond1)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1133 cond1_rhs = ((gc1 == GIMPLE_ASSIGN) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1134 ? gimple_assign_rhs2 (cond1) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1135 : gimple_cond_rhs (cond1)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1136 cond2_lhs = ((gc2 == GIMPLE_ASSIGN) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1137 ? gimple_assign_rhs1 (cond2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1138 : gimple_cond_lhs (cond2)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1139 cond2_rhs = ((gc2 == GIMPLE_ASSIGN) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1140 ? gimple_assign_rhs2 (cond2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1141 : gimple_cond_rhs (cond2)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1142 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1143 /* Assuming const operands have been swapped to the |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1144 rhs at this point of the analysis. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1145 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1146 if (cond1_lhs != cond2_lhs) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1147 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1148 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1149 if (!is_gimple_constant (cond1_rhs) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1150 || TREE_CODE (cond1_rhs) != INTEGER_CST) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1151 return (cond1_rhs == cond2_rhs); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1152 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1153 if (!is_gimple_constant (cond2_rhs) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1154 || TREE_CODE (cond2_rhs) != INTEGER_CST) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1155 return (cond1_rhs == cond2_rhs); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1156 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1157 if (cond1_code == EQ_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1158 return is_value_included_in (cond1_rhs, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1159 cond2_rhs, cond2_code); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1160 if (cond1_code == NE_EXPR || cond2_code == EQ_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1161 return ((cond2_code == cond1_code) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1162 && tree_int_cst_equal (cond1_rhs, cond2_rhs)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1163 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1164 if (((cond1_code == GE_EXPR || cond1_code == GT_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1165 && (cond2_code == LE_EXPR || cond2_code == LT_EXPR)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1166 || ((cond1_code == LE_EXPR || cond1_code == LT_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1167 && (cond2_code == GE_EXPR || cond2_code == GT_EXPR))) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1168 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1169 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1170 if (cond1_code != GE_EXPR && cond1_code != GT_EXPR |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1171 && cond1_code != LE_EXPR && cond1_code != LT_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1172 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1173 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1174 if (cond1_code == GT_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1175 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1176 cond1_code = GE_EXPR; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1177 cond1_rhs = fold_binary (PLUS_EXPR, TREE_TYPE (cond1_rhs), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1178 cond1_rhs, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1179 fold_convert (TREE_TYPE (cond1_rhs), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1180 integer_one_node)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1181 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1182 else if (cond1_code == LT_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1183 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1184 cond1_code = LE_EXPR; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1185 cond1_rhs = fold_binary (MINUS_EXPR, TREE_TYPE (cond1_rhs), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1186 cond1_rhs, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1187 fold_convert (TREE_TYPE (cond1_rhs), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1188 integer_one_node)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1189 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1190 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1191 if (!cond1_rhs) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1192 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1193 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1194 gcc_assert (cond1_code == GE_EXPR || cond1_code == LE_EXPR); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1195 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1196 if (cond2_code == GE_EXPR || cond2_code == GT_EXPR || |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1197 cond2_code == LE_EXPR || cond2_code == LT_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1198 return is_value_included_in (cond1_rhs, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1199 cond2_rhs, cond2_code); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1200 else if (cond2_code == NE_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1201 return |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1202 (is_value_included_in (cond1_rhs, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1203 cond2_rhs, cond2_code) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1204 && !is_value_included_in (cond2_rhs, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1205 cond1_rhs, cond1_code)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1206 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1207 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1208 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1209 /* Returns true if the domain of the condition expression |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1210 in COND is a subset of any of the sub-conditions |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1211 of the normalized condtion NORM_COND. INVERT is a flag |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1212 to indicate of the COND needs to be inverted. |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1213 REVERSE is a flag. When it is true, the check is reversed -- |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1214 it returns true if COND is a superset of any of the subconditions |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1215 of NORM_COND. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1216 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1217 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1218 is_subset_of_any (gimple cond, bool invert, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1219 norm_cond_t norm_cond, bool reverse) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1220 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1221 size_t i; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1222 size_t len = VEC_length (gimple, norm_cond->conds); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1223 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1224 for (i = 0; i < len; i++) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1225 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1226 if (is_gcond_subset_of (cond, invert, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1227 VEC_index (gimple, norm_cond->conds, i), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1228 false, reverse)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1229 return true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1230 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1231 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1232 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1233 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1234 /* NORM_COND1 and NORM_COND2 are normalized logical/BIT OR |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1235 expressions (formed by following UD chains not control |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1236 dependence chains). The function returns true of domain |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1237 of and expression NORM_COND1 is a subset of NORM_COND2's. |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1238 The implementation is conservative, and it returns false if |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1239 it the inclusion relationship may not hold. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1240 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1241 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1242 is_or_set_subset_of (norm_cond_t norm_cond1, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1243 norm_cond_t norm_cond2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1244 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1245 size_t i; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1246 size_t len = VEC_length (gimple, norm_cond1->conds); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1247 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1248 for (i = 0; i < len; i++) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1249 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1250 if (!is_subset_of_any (VEC_index (gimple, norm_cond1->conds, i), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1251 false, norm_cond2, false)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1252 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1253 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1254 return true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1255 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1256 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1257 /* NORM_COND1 and NORM_COND2 are normalized logical AND |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1258 expressions (formed by following UD chains not control |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1259 dependence chains). The function returns true of domain |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1260 of and expression NORM_COND1 is a subset of NORM_COND2's. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1261 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1262 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1263 is_and_set_subset_of (norm_cond_t norm_cond1, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1264 norm_cond_t norm_cond2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1265 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1266 size_t i; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1267 size_t len = VEC_length (gimple, norm_cond2->conds); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1268 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1269 for (i = 0; i < len; i++) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1270 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1271 if (!is_subset_of_any (VEC_index (gimple, norm_cond2->conds, i), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1272 false, norm_cond1, true)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1273 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1274 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1275 return true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1276 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1277 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1278 /* Returns true of the domain if NORM_COND1 is a subset |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1279 of that of NORM_COND2. Returns false if it can not be |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1280 proved to be so. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1281 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1282 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1283 is_norm_cond_subset_of (norm_cond_t norm_cond1, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1284 norm_cond_t norm_cond2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1285 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1286 size_t i; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1287 enum tree_code code1, code2; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1288 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1289 code1 = norm_cond1->cond_code; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1290 code2 = norm_cond2->cond_code; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1291 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1292 if (code1 == TRUTH_AND_EXPR || code1 == BIT_AND_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1293 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1294 /* Both conditions are AND expressions. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1295 if (code2 == TRUTH_AND_EXPR || code2 == BIT_AND_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1296 return is_and_set_subset_of (norm_cond1, norm_cond2); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1297 /* NORM_COND1 is an AND expression, and NORM_COND2 is an OR |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1298 expression. In this case, returns true if any subexpression |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1299 of NORM_COND1 is a subset of any subexpression of NORM_COND2. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1300 else if (code2 == TRUTH_OR_EXPR || code2 == BIT_IOR_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1301 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1302 size_t len1; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1303 len1 = VEC_length (gimple, norm_cond1->conds); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1304 for (i = 0; i < len1; i++) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1305 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1306 gimple cond1 = VEC_index (gimple, norm_cond1->conds, i); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1307 if (is_subset_of_any (cond1, false, norm_cond2, false)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1308 return true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1309 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1310 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1311 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1312 else |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1313 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1314 gcc_assert (code2 == ERROR_MARK); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1315 gcc_assert (VEC_length (gimple, norm_cond2->conds) == 1); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1316 return is_subset_of_any (VEC_index (gimple, norm_cond2->conds, 0), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1317 norm_cond2->invert, norm_cond1, true); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1318 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1319 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1320 /* NORM_COND1 is an OR expression */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1321 else if (code1 == TRUTH_OR_EXPR || code1 == BIT_IOR_EXPR) |
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update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1322 { |
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update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1323 if (code2 != code1) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1324 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1325 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1326 return is_or_set_subset_of (norm_cond1, norm_cond2); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1327 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1328 else |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1329 { |
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update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1330 gcc_assert (code1 == ERROR_MARK); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1331 gcc_assert (VEC_length (gimple, norm_cond1->conds) == 1); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1332 /* Conservatively returns false if NORM_COND1 is non-decomposible |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1333 and NORM_COND2 is an AND expression. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1334 if (code2 == TRUTH_AND_EXPR || code2 == BIT_AND_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1335 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1336 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1337 if (code2 == TRUTH_OR_EXPR || code2 == BIT_IOR_EXPR) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1338 return is_subset_of_any (VEC_index (gimple, norm_cond1->conds, 0), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1339 norm_cond1->invert, norm_cond2, false); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1340 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1341 gcc_assert (code2 == ERROR_MARK); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1342 gcc_assert (VEC_length (gimple, norm_cond2->conds) == 1); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1343 return is_gcond_subset_of (VEC_index (gimple, norm_cond1->conds, 0), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1344 norm_cond1->invert, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1345 VEC_index (gimple, norm_cond2->conds, 0), |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1346 norm_cond2->invert, false); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1347 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1348 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1349 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1350 /* Returns true of the domain of single predicate expression |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1351 EXPR1 is a subset of that of EXPR2. Returns false if it |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1352 can not be proved. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1353 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1354 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1355 is_pred_expr_subset_of (use_pred_info_t expr1, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1356 use_pred_info_t expr2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1357 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1358 gimple cond1, cond2; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1359 enum tree_code code1, code2; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1360 struct norm_cond norm_cond1, norm_cond2; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1361 bool is_subset = false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1362 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1363 cond1 = expr1->cond; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1364 cond2 = expr2->cond; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1365 code1 = gimple_cond_code (cond1); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1366 code2 = gimple_cond_code (cond2); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1367 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1368 if (expr1->invert) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1369 code1 = invert_tree_comparison (code1, false); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1370 if (expr2->invert) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1371 code2 = invert_tree_comparison (code2, false); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1372 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1373 /* Fast path -- match exactly */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1374 if ((gimple_cond_lhs (cond1) == gimple_cond_lhs (cond2)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1375 && (gimple_cond_rhs (cond1) == gimple_cond_rhs (cond2)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1376 && (code1 == code2)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1377 return true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1378 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1379 /* Normalize conditions. To keep NE_EXPR, do not invert |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1380 with both need inversion. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1381 normalize_cond (cond1, &norm_cond1, (expr1->invert)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1382 normalize_cond (cond2, &norm_cond2, (expr2->invert)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1383 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1384 is_subset = is_norm_cond_subset_of (&norm_cond1, &norm_cond2); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1385 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1386 /* Free memory */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1387 VEC_free (gimple, heap, norm_cond1.conds); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1388 VEC_free (gimple, heap, norm_cond2.conds); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1389 return is_subset ; |
b7f97abdc517
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1390 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1391 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1392 /* Returns true if the domain of PRED1 is a subset |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1393 of that of PRED2. Returns false if it can not be proved so. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1394 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1395 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1396 is_pred_chain_subset_of (VEC(use_pred_info_t, heap) *pred1, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1397 VEC(use_pred_info_t, heap) *pred2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1398 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1399 size_t np1, np2, i1, i2; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1400 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1401 np1 = VEC_length (use_pred_info_t, pred1); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1402 np2 = VEC_length (use_pred_info_t, pred2); |
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update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1403 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1404 for (i2 = 0; i2 < np2; i2++) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1405 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1406 bool found = false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1407 use_pred_info_t info2 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1408 = VEC_index (use_pred_info_t, pred2, i2); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1409 for (i1 = 0; i1 < np1; i1++) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1410 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1411 use_pred_info_t info1 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1412 = VEC_index (use_pred_info_t, pred1, i1); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1413 if (is_pred_expr_subset_of (info1, info2)) |
b7f97abdc517
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1414 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1415 found = true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1416 break; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1417 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1418 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1419 if (!found) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1420 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1421 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1422 return true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1423 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1424 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1425 /* Returns true if the domain defined by |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1426 one pred chain ONE_PRED is a subset of the domain |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1427 of *PREDS. It returns false if ONE_PRED's domain is |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1428 not a subset of any of the sub-domains of PREDS ( |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1429 corresponding to each individual chains in it), even |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1430 though it may be still be a subset of whole domain |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1431 of PREDS which is the union (ORed) of all its subdomains. |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1432 In other words, the result is conservative. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1433 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1434 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1435 is_included_in (VEC(use_pred_info_t, heap) *one_pred, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1436 VEC(use_pred_info_t, heap) **preds, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1437 size_t n) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1438 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1439 size_t i; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1440 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1441 for (i = 0; i < n; i++) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1442 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1443 if (is_pred_chain_subset_of (one_pred, preds[i])) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1444 return true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1445 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1446 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1447 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1448 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1449 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1450 /* compares two predicate sets PREDS1 and PREDS2 and returns |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1451 true if the domain defined by PREDS1 is a superset |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1452 of PREDS2's domain. N1 and N2 are array sizes of PREDS1 and |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1453 PREDS2 respectively. The implementation chooses not to build |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1454 generic trees (and relying on the folding capability of the |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1455 compiler), but instead performs brute force comparison of |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1456 individual predicate chains (won't be a compile time problem |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1457 as the chains are pretty short). When the function returns |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1458 false, it does not necessarily mean *PREDS1 is not a superset |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1459 of *PREDS2, but mean it may not be so since the analysis can |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1460 not prove it. In such cases, false warnings may still be |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1461 emitted. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1462 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1463 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1464 is_superset_of (VEC(use_pred_info_t, heap) **preds1, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1465 size_t n1, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1466 VEC(use_pred_info_t, heap) **preds2, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1467 size_t n2) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1468 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1469 size_t i; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1470 VEC(use_pred_info_t, heap) *one_pred_chain; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1471 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1472 for (i = 0; i < n2; i++) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1473 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1474 one_pred_chain = preds2[i]; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1475 if (!is_included_in (one_pred_chain, preds1, n1)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1476 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1477 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1478 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1479 return true; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1480 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1481 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1482 /* Computes the predicates that guard the use and checks |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1483 if the incoming paths that have empty (or possibly |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1484 empty) defintion can be pruned/filtered. The function returns |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1485 true if it can be determined that the use of PHI's def in |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1486 USE_STMT is guarded with a predicate set not overlapping with |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1487 predicate sets of all runtime paths that do not have a definition. |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1488 Returns false if it is not or it can not be determined. USE_BB is |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1489 the bb of the use (for phi operand use, the bb is not the bb of |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1490 the phi stmt, but the src bb of the operand edge). UNINIT_OPNDS |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1491 is a bit vector. If an operand of PHI is uninitialized, the |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1492 correponding bit in the vector is 1. VISIED_PHIS is a pointer |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1493 set of phis being visted. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1494 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1495 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1496 is_use_properly_guarded (gimple use_stmt, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1497 basic_block use_bb, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1498 gimple phi, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1499 unsigned uninit_opnds, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1500 struct pointer_set_t *visited_phis) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1501 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1502 basic_block phi_bb; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1503 VEC(use_pred_info_t, heap) **preds = 0; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1504 VEC(use_pred_info_t, heap) **def_preds = 0; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1505 size_t num_preds = 0, num_def_preds = 0; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1506 bool has_valid_preds = false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1507 bool is_properly_guarded = false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1508 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1509 if (pointer_set_insert (visited_phis, phi)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1510 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1511 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1512 phi_bb = gimple_bb (phi); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1513 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1514 if (is_non_loop_exit_postdominating (use_bb, phi_bb)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1515 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1516 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1517 has_valid_preds = find_predicates (&preds, &num_preds, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1518 phi_bb, use_bb); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1519 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1520 if (!has_valid_preds) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1521 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1522 destroy_predicate_vecs (num_preds, preds); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1523 return false; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1524 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1525 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1526 if (dump_file) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1527 dump_predicates (use_stmt, num_preds, preds, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1528 "Use in stmt "); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1529 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1530 has_valid_preds = find_def_preds (&def_preds, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1531 &num_def_preds, phi); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1532 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1533 if (has_valid_preds) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1534 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1535 if (dump_file) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1536 dump_predicates (phi, num_def_preds, def_preds, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1537 "Operand defs of phi "); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1538 is_properly_guarded = |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1539 is_superset_of (def_preds, num_def_preds, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1540 preds, num_preds); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1541 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1542 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1543 /* further prune the dead incoming phi edges. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1544 if (!is_properly_guarded) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1545 is_properly_guarded |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1546 = use_pred_not_overlap_with_undef_path_pred ( |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1547 num_preds, preds, phi, uninit_opnds, visited_phis); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1548 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1549 destroy_predicate_vecs (num_preds, preds); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1550 destroy_predicate_vecs (num_def_preds, def_preds); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1551 return is_properly_guarded; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1552 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1553 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1554 /* Searches through all uses of a potentially |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1555 uninitialized variable defined by PHI and returns a use |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1556 statement if the use is not properly guarded. It returns |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1557 NULL if all uses are guarded. UNINIT_OPNDS is a bitvector |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1558 holding the position(s) of uninit PHI operands. WORKLIST |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1559 is the vector of candidate phis that may be updated by this |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1560 function. ADDED_TO_WORKLIST is the pointer set tracking |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1561 if the new phi is already in the worklist. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1562 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1563 static gimple |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1564 find_uninit_use (gimple phi, unsigned uninit_opnds, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1565 VEC(gimple, heap) **worklist, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1566 struct pointer_set_t *added_to_worklist) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1567 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1568 tree phi_result; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1569 use_operand_p use_p; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1570 gimple use_stmt; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1571 imm_use_iterator iter; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1572 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1573 phi_result = gimple_phi_result (phi); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1574 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1575 FOR_EACH_IMM_USE_FAST (use_p, iter, phi_result) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1576 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1577 struct pointer_set_t *visited_phis; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1578 basic_block use_bb; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1579 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1580 use_stmt = use_p->loc.stmt; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1581 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1582 visited_phis = pointer_set_create (); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1583 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1584 use_bb = gimple_bb (use_stmt); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1585 if (gimple_code (use_stmt) == GIMPLE_PHI) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1586 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1587 unsigned i, n; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1588 n = gimple_phi_num_args (use_stmt); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1589 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1590 /* Find the matching phi argument of the use. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1591 for (i = 0; i < n; ++i) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1592 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1593 if (gimple_phi_arg_def_ptr (use_stmt, i) == use_p->use) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1594 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1595 edge e = gimple_phi_arg_edge (use_stmt, i); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1596 use_bb = e->src; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1597 break; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1598 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1599 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1600 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1601 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1602 if (is_use_properly_guarded (use_stmt, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1603 use_bb, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1604 phi, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1605 uninit_opnds, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1606 visited_phis)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1607 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1608 pointer_set_destroy (visited_phis); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1609 continue; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1610 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1611 pointer_set_destroy (visited_phis); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1612 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1613 /* Found one real use, return. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1614 if (gimple_code (use_stmt) != GIMPLE_PHI) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1615 return use_stmt; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1616 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1617 /* Found a phi use that is not guarded, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1618 add the phi to the worklist. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1619 if (!pointer_set_insert (added_to_worklist, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1620 use_stmt)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1621 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1622 VEC_safe_push (gimple, heap, *worklist, use_stmt); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1623 pointer_set_insert (possibly_undefined_names, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1624 phi_result); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1625 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1626 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1627 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1628 return NULL; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1629 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1630 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1631 /* Look for inputs to PHI that are SSA_NAMEs that have empty definitions |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1632 and gives warning if there exists a runtime path from the entry to a |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1633 use of the PHI def that does not contain a definition. In other words, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1634 the warning is on the real use. The more dead paths that can be pruned |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1635 by the compiler, the fewer false positives the warning is. WORKLIST |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1636 is a vector of candidate phis to be examined. ADDED_TO_WORKLIST is |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1637 a pointer set tracking if the new phi is added to the worklist or not. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1638 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1639 static void |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1640 warn_uninitialized_phi (gimple phi, VEC(gimple, heap) **worklist, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1641 struct pointer_set_t *added_to_worklist) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1642 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1643 unsigned uninit_opnds; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1644 gimple uninit_use_stmt = 0; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1645 tree uninit_op; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1646 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1647 /* Don't look at memory tags. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1648 if (!is_gimple_reg (gimple_phi_result (phi))) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1649 return; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1650 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1651 uninit_opnds = compute_uninit_opnds_pos (phi); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1652 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1653 if (MASK_EMPTY (uninit_opnds)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1654 return; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1655 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1656 /* Now check if we have any use of the value without proper guard. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1657 uninit_use_stmt = find_uninit_use (phi, uninit_opnds, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1658 worklist, added_to_worklist); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1659 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1660 /* All uses are properly guarded. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1661 if (!uninit_use_stmt) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1662 return; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1663 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1664 uninit_op = gimple_phi_arg_def (phi, MASK_FIRST_SET_BIT (uninit_opnds)); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1665 warn_uninit (uninit_op, |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1666 "%qD may be used uninitialized in this function", |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1667 uninit_use_stmt); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1668 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1669 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1670 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1671 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1672 /* Entry point to the late uninitialized warning pass. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1673 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1674 static unsigned int |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1675 execute_late_warn_uninitialized (void) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1676 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1677 basic_block bb; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1678 gimple_stmt_iterator gsi; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1679 VEC(gimple, heap) *worklist = 0; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1680 struct pointer_set_t *added_to_worklist; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1681 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1682 calculate_dominance_info (CDI_DOMINATORS); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1683 calculate_dominance_info (CDI_POST_DOMINATORS); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1684 /* Re-do the plain uninitialized variable check, as optimization may have |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1685 straightened control flow. Do this first so that we don't accidentally |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1686 get a "may be" warning when we'd have seen an "is" warning later. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1687 warn_uninitialized_vars (/*warn_possibly_uninitialized=*/1); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1688 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1689 timevar_push (TV_TREE_UNINIT); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1690 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1691 possibly_undefined_names = pointer_set_create (); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1692 added_to_worklist = pointer_set_create (); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1693 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1694 /* Initialize worklist */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1695 FOR_EACH_BB (bb) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1696 for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1697 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1698 gimple phi = gsi_stmt (gsi); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1699 size_t n, i; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1700 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1701 n = gimple_phi_num_args (phi); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1702 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1703 /* Don't look at memory tags. */ |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1704 if (!is_gimple_reg (gimple_phi_result (phi))) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1705 continue; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1706 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1707 for (i = 0; i < n; ++i) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1708 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1709 tree op = gimple_phi_arg_def (phi, i); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1710 if (TREE_CODE (op) == SSA_NAME |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1711 && ssa_undefined_value_p (op)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1712 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1713 VEC_safe_push (gimple, heap, worklist, phi); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1714 pointer_set_insert (added_to_worklist, phi); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1715 break; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1716 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1717 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1718 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1719 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1720 while (VEC_length (gimple, worklist) != 0) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1721 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1722 gimple cur_phi = 0; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1723 cur_phi = VEC_pop (gimple, worklist); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1724 warn_uninitialized_phi (cur_phi, &worklist, added_to_worklist); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1725 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1726 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1727 VEC_free (gimple, heap, worklist); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1728 pointer_set_destroy (added_to_worklist); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1729 pointer_set_destroy (possibly_undefined_names); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1730 possibly_undefined_names = NULL; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1731 free_dominance_info (CDI_POST_DOMINATORS); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1732 timevar_pop (TV_TREE_UNINIT); |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1733 return 0; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1734 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1735 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1736 static bool |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1737 gate_warn_uninitialized (void) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1738 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1739 return warn_uninitialized != 0; |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1740 } |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1741 |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1742 struct gimple_opt_pass pass_late_warn_uninitialized = |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1743 { |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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1744 { |
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parents:
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1745 GIMPLE_PASS, |
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parents:
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1746 "uninit", /* name */ |
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parents:
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|
1747 gate_warn_uninitialized, /* gate */ |
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1748 execute_late_warn_uninitialized, /* execute */ |
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1749 NULL, /* sub */ |
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1750 NULL, /* next */ |
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1751 0, /* static_pass_number */ |
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1752 TV_NONE, /* tv_id */ |
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1753 PROP_ssa, /* properties_required */ |
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1754 0, /* properties_provided */ |
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1755 0, /* properties_destroyed */ |
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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1756 0, /* todo_flags_start */ |
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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1757 0 /* todo_flags_finish */ |
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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1758 } |
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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1759 }; |