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annotate gcc/config/rx/rx-protos.h @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
parents 84e7813d76e9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* Exported function prototypes from the Renesas RX backend.
145
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2 Copyright (C) 2008-2020 Free Software Foundation, Inc.
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3 Contributed by Red Hat.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #ifndef GCC_RX_PROTOS_H
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22 #define GCC_RX_PROTOS_H
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23
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24 extern bool rx_can_use_simple_return (void);
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25 extern void rx_expand_epilogue (bool);
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26 extern void rx_expand_prologue (void);
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27 extern int rx_initial_elimination_offset (int, int);
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28
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29 bool is_interrupt_func (const_tree decl);
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30 bool is_fast_interrupt_func (const_tree decl);
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31
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32 /* rx_atomic_sequence is used to emit the header and footer
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33 of an atomic sequence. It's supposed to be used in a scope.
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34 When constructed, it will emit the atomic sequence header insns.
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35 When destructred (goes out of scope), it will emit the
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36 corresponding atomic sequence footer insns. */
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37 class rx_atomic_sequence
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38 {
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39 public:
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40 rx_atomic_sequence (const_tree fun_decl);
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41 ~rx_atomic_sequence (void);
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42
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43 private:
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44 rx_atomic_sequence (void);
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45 rx_atomic_sequence (const rx_atomic_sequence&);
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46 rx_atomic_sequence& operator = (const rx_atomic_sequence&);
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47
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48 rtx m_prev_psw_reg;
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49 };
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50
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51 #ifdef RTX_CODE
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52 extern int rx_adjust_insn_length (rtx_insn *, int);
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53 extern align_flags rx_align_for_label (rtx_insn *, int);
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54 extern void rx_emit_stack_popm (rtx *, bool);
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55 extern void rx_emit_stack_pushm (rtx *);
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56 extern char * rx_gen_move_template (rtx *, bool);
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57 extern bool rx_is_legitimate_constant (machine_mode, rtx);
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58 extern bool rx_is_restricted_memory_address (rtx,
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59 machine_mode);
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60 extern bool rx_match_ccmode (rtx, machine_mode);
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61 extern rtx rx_maybe_pidify_operand (rtx, int);
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62 extern void rx_notice_update_cc (rtx, rtx);
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63 extern void rx_split_cbranch (machine_mode, enum rtx_code,
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64 rtx, rtx, rtx);
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65 extern machine_mode rx_select_cc_mode (enum rtx_code, rtx, rtx);
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66
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67 extern bool rx_reg_dead_or_unused_after_insn (const rtx_insn* i, int regno);
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68 extern void rx_copy_reg_dead_or_unused_notes (rtx reg, const rtx_insn* src,
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69 rtx_insn* dst);
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70
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71 extern bool rx_fuse_in_memory_bitop (rtx* operands, rtx_insn* curr_insn,
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72 rtx (*gen_insn)(rtx, rtx));
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73
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74 /* Result value of rx_find_set_of_reg. */
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75 struct set_of_reg
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76 {
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77 /* The insn where sh_find_set_of_reg stopped looking.
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78 Can be NULL_RTX if the end of the insn list was reached. */
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79 rtx_insn* insn;
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80
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81 /* The set rtx of the specified reg if found, NULL_RTX otherwise. */
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82 const_rtx set_rtx;
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83
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84 /* The set source rtx of the specified reg if found, NULL_RTX otherwise.
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85 Usually, this is the most interesting return value. */
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86 rtx set_src;
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87 };
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88
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89 /* FIXME: Copy-pasta from SH. Move to rtl.h.
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90 Given a reg rtx and a start insn, try to find the insn that sets
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91 the specified reg by using the specified insn stepping function,
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92 such as 'prev_nonnote_nondebug_insn_bb'. When the insn is found,
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93 try to extract the rtx of the reg set. */
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94 template <typename F> inline set_of_reg
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95 rx_find_set_of_reg (rtx reg, rtx_insn* insn, F stepfunc,
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96 bool ignore_reg_reg_copies = false)
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97 {
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98 set_of_reg result;
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99 result.insn = insn;
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100 result.set_rtx = NULL_RTX;
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101 result.set_src = NULL_RTX;
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102
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103 if (!REG_P (reg) || insn == NULL_RTX)
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104 return result;
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105
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106 for (rtx_insn* i = stepfunc (insn); i != NULL_RTX; i = stepfunc (i))
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107 {
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108 if (BARRIER_P (i))
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109 break;
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110 if (!INSN_P (i) || DEBUG_INSN_P (i))
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111 continue;
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112 if (reg_set_p (reg, i))
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113 {
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114 if (CALL_P (i))
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115 break;
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116
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117 result.insn = i;
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118 result.set_rtx = set_of (reg, i);
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119
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120 if (result.set_rtx == NULL_RTX || GET_CODE (result.set_rtx) != SET)
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121 break;
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122
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123 result.set_src = XEXP (result.set_rtx, 1);
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124
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125 if (ignore_reg_reg_copies && REG_P (result.set_src))
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126 {
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127 reg = result.set_src;
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128 continue;
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129 }
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130 if (ignore_reg_reg_copies && SUBREG_P (result.set_src)
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131 && REG_P (SUBREG_REG (result.set_src)))
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132 {
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133 reg = SUBREG_REG (result.set_src);
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134 continue;
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135 }
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136
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137 break;
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138 }
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139 }
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140
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141 /* If the searched reg is found inside a (mem (post_inc:SI (reg))), set_of
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142 will return NULL and set_rtx will be NULL.
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143 In this case report a 'not found'. result.insn will always be non-null
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144 at this point, so no need to check it. */
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145 if (result.set_src != NULL && result.set_rtx == NULL)
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146 result.set_src = NULL;
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147
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148 return result;
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149 }
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150
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151 /* FIXME: Move to rtlh.h. */
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152 template <typename F> inline rtx_insn*
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153 rx_find_use_of_reg (rtx reg, rtx_insn* insn, F stepfunc)
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154 {
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155 if (!REG_P (reg) || insn == NULL_RTX)
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156 return NULL;
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157
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158 for (rtx_insn* i = stepfunc (insn); i != NULL_RTX; i = stepfunc (i))
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159 {
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160 if (BARRIER_P (i))
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161 break;
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162 if (!INSN_P (i) || DEBUG_INSN_P (i))
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163 continue;
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164 if (reg_overlap_mentioned_p (reg, PATTERN (i))
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165 || (CALL_P (i) && find_reg_fusage (i, USE, reg)))
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166 return i;
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167 }
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168
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169 return NULL;
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170 }
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171
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172 #endif
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173
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174 #endif /* GCC_RX_PROTOS_H */