Mercurial > hg > CbC > CbC_gcc
annotate gcc/graphite-sese-to-poly.c @ 143:76e1cf5455ef
add cbc_gc test
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Sun, 23 Dec 2018 19:24:05 +0900 |
| parents | 84e7813d76e9 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
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1 /* Conversion of SESE regions to Polyhedra. |
| 131 | 2 Copyright (C) 2009-2018 Free Software Foundation, Inc. |
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3 Contributed by Sebastian Pop <sebastian.pop@amd.com>. |
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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 |
| 111 | 21 #define USES_ISL |
| 22 | |
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23 #include "config.h" |
| 111 | 24 |
| 25 #ifdef HAVE_isl | |
| 26 | |
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27 #include "system.h" |
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28 #include "coretypes.h" |
| 111 | 29 #include "backend.h" |
| 30 #include "cfghooks.h" | |
| 31 #include "tree.h" | |
| 32 #include "gimple.h" | |
| 33 #include "ssa.h" | |
| 34 #include "params.h" | |
| 35 #include "fold-const.h" | |
| 36 #include "gimple-iterator.h" | |
| 37 #include "gimplify.h" | |
| 38 #include "gimplify-me.h" | |
| 39 #include "tree-cfg.h" | |
| 40 #include "tree-ssa-loop-manip.h" | |
| 41 #include "tree-ssa-loop-niter.h" | |
| 42 #include "tree-ssa-loop.h" | |
| 43 #include "tree-into-ssa.h" | |
| 44 #include "tree-pass.h" | |
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45 #include "cfgloop.h" |
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46 #include "tree-data-ref.h" |
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47 #include "tree-scalar-evolution.h" |
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48 #include "domwalk.h" |
| 111 | 49 #include "tree-ssa-propagate.h" |
| 50 | |
| 51 #include <isl/constraint.h> | |
| 52 #include <isl/set.h> | |
| 53 #include <isl/map.h> | |
| 54 #include <isl/union_map.h> | |
| 55 #include <isl/constraint.h> | |
| 56 #include <isl/aff.h> | |
| 57 #include <isl/val.h> | |
| 58 | |
| 59 #include "graphite.h" | |
| 60 | |
| 61 /* Return an isl identifier for the polyhedral basic block PBB. */ | |
| 62 | |
| 63 static isl_id * | |
| 64 isl_id_for_pbb (scop_p s, poly_bb_p pbb) | |
| 65 { | |
| 66 char name[14]; | |
| 67 snprintf (name, sizeof (name), "S_%d", pbb_index (pbb)); | |
| 68 return isl_id_alloc (s->isl_context, name, pbb); | |
| 69 } | |
| 70 | |
| 71 static isl_pw_aff *extract_affine (scop_p, tree, __isl_take isl_space *space); | |
| 72 | |
| 73 /* Extract an affine expression from the chain of recurrence E. */ | |
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74 |
| 111 | 75 static isl_pw_aff * |
| 76 extract_affine_chrec (scop_p s, tree e, __isl_take isl_space *space) | |
| 77 { | |
| 78 isl_pw_aff *lhs = extract_affine (s, CHREC_LEFT (e), isl_space_copy (space)); | |
| 79 isl_pw_aff *rhs = extract_affine (s, CHREC_RIGHT (e), isl_space_copy (space)); | |
| 80 isl_local_space *ls = isl_local_space_from_space (space); | |
| 81 unsigned pos = sese_loop_depth (s->scop_info->region, get_chrec_loop (e)) - 1; | |
| 82 isl_aff *loop = isl_aff_set_coefficient_si | |
| 83 (isl_aff_zero_on_domain (ls), isl_dim_in, pos, 1); | |
| 84 isl_pw_aff *l = isl_pw_aff_from_aff (loop); | |
| 85 | |
| 86 /* Before multiplying, make sure that the result is affine. */ | |
| 87 gcc_assert (isl_pw_aff_is_cst (rhs) | |
| 88 || isl_pw_aff_is_cst (l)); | |
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89 |
| 111 | 90 return isl_pw_aff_add (lhs, isl_pw_aff_mul (rhs, l)); |
| 91 } | |
| 92 | |
| 93 /* Extract an affine expression from the mult_expr E. */ | |
| 94 | |
| 95 static isl_pw_aff * | |
| 96 extract_affine_mul (scop_p s, tree e, __isl_take isl_space *space) | |
| 97 { | |
| 98 isl_pw_aff *lhs = extract_affine (s, TREE_OPERAND (e, 0), | |
| 99 isl_space_copy (space)); | |
| 100 isl_pw_aff *rhs = extract_affine (s, TREE_OPERAND (e, 1), space); | |
| 101 | |
| 102 if (!isl_pw_aff_is_cst (lhs) | |
| 103 && !isl_pw_aff_is_cst (rhs)) | |
| 104 { | |
| 105 isl_pw_aff_free (lhs); | |
| 106 isl_pw_aff_free (rhs); | |
| 107 return NULL; | |
| 108 } | |
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109 |
| 111 | 110 return isl_pw_aff_mul (lhs, rhs); |
| 111 } | |
| 112 | |
| 113 /* Return an isl identifier from the name of the ssa_name E. */ | |
| 114 | |
| 115 static isl_id * | |
| 116 isl_id_for_ssa_name (scop_p s, tree e) | |
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117 { |
| 111 | 118 char name1[14]; |
| 119 snprintf (name1, sizeof (name1), "P_%d", SSA_NAME_VERSION (e)); | |
| 120 return isl_id_alloc (s->isl_context, name1, e); | |
| 121 } | |
| 122 | |
| 123 /* Return an isl identifier for the data reference DR. Data references and | |
| 124 scalar references get the same isl_id. They need to be comparable and are | |
| 125 distinguished through the first dimension, which contains the alias set or | |
| 126 SSA_NAME_VERSION number. */ | |
| 127 | |
| 128 static isl_id * | |
| 129 isl_id_for_dr (scop_p s) | |
| 130 { | |
| 131 return isl_id_alloc (s->isl_context, "", 0); | |
| 132 } | |
| 133 | |
| 134 /* Extract an affine expression from the ssa_name E. */ | |
| 135 | |
| 136 static isl_pw_aff * | |
| 137 extract_affine_name (int dimension, __isl_take isl_space *space) | |
| 138 { | |
| 139 isl_set *dom = isl_set_universe (isl_space_copy (space)); | |
| 140 isl_aff *aff = isl_aff_zero_on_domain (isl_local_space_from_space (space)); | |
| 141 aff = isl_aff_add_coefficient_si (aff, isl_dim_param, dimension, 1); | |
| 142 return isl_pw_aff_alloc (dom, aff); | |
| 143 } | |
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144 |
| 111 | 145 /* Convert WI to a isl_val with CTX. */ |
| 146 | |
| 147 static __isl_give isl_val * | |
| 148 isl_val_int_from_wi (isl_ctx *ctx, const widest_int &wi) | |
| 149 { | |
| 150 if (wi::neg_p (wi, SIGNED)) | |
| 151 { | |
| 152 widest_int mwi = -wi; | |
| 153 return isl_val_neg (isl_val_int_from_chunks (ctx, mwi.get_len (), | |
| 154 sizeof (HOST_WIDE_INT), | |
| 155 mwi.get_val ())); | |
| 156 } | |
| 157 return isl_val_int_from_chunks (ctx, wi.get_len (), sizeof (HOST_WIDE_INT), | |
| 158 wi.get_val ()); | |
| 159 } | |
| 160 | |
| 161 /* Extract an affine expression from the gmp constant G. */ | |
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162 |
| 111 | 163 static isl_pw_aff * |
| 164 extract_affine_wi (const widest_int &g, __isl_take isl_space *space) | |
| 165 { | |
| 166 isl_local_space *ls = isl_local_space_from_space (isl_space_copy (space)); | |
| 167 isl_aff *aff = isl_aff_zero_on_domain (ls); | |
| 168 isl_set *dom = isl_set_universe (space); | |
| 169 isl_ctx *ct = isl_aff_get_ctx (aff); | |
| 170 isl_val *v = isl_val_int_from_wi (ct, g); | |
| 171 aff = isl_aff_add_constant_val (aff, v); | |
| 172 | |
| 173 return isl_pw_aff_alloc (dom, aff); | |
| 174 } | |
| 175 | |
| 176 /* Extract an affine expression from the integer_cst E. */ | |
| 177 | |
| 178 static isl_pw_aff * | |
| 179 extract_affine_int (tree e, __isl_take isl_space *space) | |
| 180 { | |
| 181 isl_pw_aff *res = extract_affine_wi (wi::to_widest (e), space); | |
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182 return res; |
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183 } |
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184 |
| 111 | 185 /* Compute pwaff mod 2^width. */ |
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186 |
| 111 | 187 static isl_pw_aff * |
| 188 wrap (isl_pw_aff *pwaff, unsigned width) | |
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189 { |
| 111 | 190 isl_val *mod; |
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191 |
| 111 | 192 mod = isl_val_int_from_ui (isl_pw_aff_get_ctx (pwaff), width); |
| 193 mod = isl_val_2exp (mod); | |
| 194 pwaff = isl_pw_aff_mod_val (pwaff, mod); | |
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195 |
| 111 | 196 return pwaff; |
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197 } |
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198 |
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199 /* When parameter NAME is in REGION, returns its index in SESE_PARAMS. |
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200 Otherwise returns -1. */ |
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201 |
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202 static inline int |
| 111 | 203 parameter_index_in_region (tree name, sese_info_p region) |
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204 { |
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205 int i; |
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206 tree p; |
| 111 | 207 FOR_EACH_VEC_ELT (region->params, i, p) |
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208 if (p == name) |
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209 return i; |
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210 return -1; |
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211 } |
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212 |
| 111 | 213 /* Extract an affine expression from the tree E in the scop S. */ |
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214 |
| 111 | 215 static isl_pw_aff * |
| 216 extract_affine (scop_p s, tree e, __isl_take isl_space *space) | |
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217 { |
| 111 | 218 isl_pw_aff *lhs, *rhs, *res; |
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219 |
| 111 | 220 if (e == chrec_dont_know) { |
| 221 isl_space_free (space); | |
| 222 return NULL; | |
| 223 } | |
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224 |
| 111 | 225 tree type = TREE_TYPE (e); |
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226 switch (TREE_CODE (e)) |
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227 { |
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228 case POLYNOMIAL_CHREC: |
| 111 | 229 res = extract_affine_chrec (s, e, space); |
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230 break; |
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231 |
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232 case MULT_EXPR: |
| 111 | 233 res = extract_affine_mul (s, e, space); |
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234 break; |
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235 |
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236 case POINTER_PLUS_EXPR: |
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237 { |
| 111 | 238 lhs = extract_affine (s, TREE_OPERAND (e, 0), isl_space_copy (space)); |
| 239 /* The RHS of a pointer-plus expression is to be interpreted | |
| 240 as signed value. Try to look through a sign-changing conversion | |
| 241 first. */ | |
| 242 tree tem = TREE_OPERAND (e, 1); | |
| 243 STRIP_NOPS (tem); | |
| 244 rhs = extract_affine (s, tem, space); | |
| 245 if (TYPE_UNSIGNED (TREE_TYPE (tem))) | |
| 246 rhs = wrap (rhs, TYPE_PRECISION (type) - 1); | |
| 247 res = isl_pw_aff_add (lhs, rhs); | |
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248 break; |
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249 } |
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250 |
| 111 | 251 case PLUS_EXPR: |
| 252 lhs = extract_affine (s, TREE_OPERAND (e, 0), isl_space_copy (space)); | |
| 253 rhs = extract_affine (s, TREE_OPERAND (e, 1), space); | |
| 254 res = isl_pw_aff_add (lhs, rhs); | |
| 255 break; | |
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256 |
| 111 | 257 case MINUS_EXPR: |
| 258 lhs = extract_affine (s, TREE_OPERAND (e, 0), isl_space_copy (space)); | |
| 259 rhs = extract_affine (s, TREE_OPERAND (e, 1), space); | |
| 260 res = isl_pw_aff_sub (lhs, rhs); | |
| 261 break; | |
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262 |
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263 case BIT_NOT_EXPR: |
| 111 | 264 lhs = extract_affine (s, integer_minus_one_node, isl_space_copy (space)); |
| 265 rhs = extract_affine (s, TREE_OPERAND (e, 0), space); | |
| 266 res = isl_pw_aff_sub (lhs, rhs); | |
| 131 | 267 /* We need to always wrap the result of a bitwise operation. */ |
| 268 return wrap (res, TYPE_PRECISION (type) - (TYPE_UNSIGNED (type) ? 0 : 1)); | |
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269 |
| 111 | 270 case NEGATE_EXPR: |
| 271 lhs = extract_affine (s, TREE_OPERAND (e, 0), isl_space_copy (space)); | |
| 272 rhs = extract_affine (s, integer_minus_one_node, space); | |
| 273 res = isl_pw_aff_mul (lhs, rhs); | |
| 274 break; | |
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275 |
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276 case SSA_NAME: |
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277 { |
| 111 | 278 gcc_assert (! defined_in_sese_p (e, s->scop_info->region)); |
| 279 int dim = parameter_index_in_region (e, s->scop_info); | |
| 280 gcc_assert (dim != -1); | |
| 131 | 281 /* No need to wrap a parameter. */ |
| 282 return extract_affine_name (dim, space); | |
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283 } |
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284 |
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285 case INTEGER_CST: |
| 111 | 286 res = extract_affine_int (e, space); |
| 287 /* No need to wrap a single integer. */ | |
| 288 return res; | |
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289 |
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290 CASE_CONVERT: |
| 111 | 291 { |
| 292 tree itype = TREE_TYPE (TREE_OPERAND (e, 0)); | |
| 293 res = extract_affine (s, TREE_OPERAND (e, 0), space); | |
| 294 /* Signed values, even if overflow is undefined, get modulo-reduced. | |
| 295 But only if not all values of the old type fit in the new. */ | |
| 296 if (! TYPE_UNSIGNED (type) | |
| 131 | 297 && ((TYPE_UNSIGNED (itype) |
| 111 | 298 && TYPE_PRECISION (type) <= TYPE_PRECISION (itype)) |
| 299 || TYPE_PRECISION (type) < TYPE_PRECISION (itype))) | |
| 300 res = wrap (res, TYPE_PRECISION (type) - 1); | |
| 131 | 301 else if (TYPE_UNSIGNED (type) |
| 302 && (!TYPE_UNSIGNED (itype) | |
| 303 || TYPE_PRECISION (type) < TYPE_PRECISION (itype))) | |
| 304 res = wrap (res, TYPE_PRECISION (type)); | |
| 305 return res; | |
| 111 | 306 } |
| 307 | |
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308 case NON_LVALUE_EXPR: |
| 111 | 309 res = extract_affine (s, TREE_OPERAND (e, 0), space); |
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310 break; |
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311 |
| 111 | 312 default: |
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313 gcc_unreachable (); |
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314 break; |
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315 } |
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316 |
| 131 | 317 /* For all wrapping arithmetic wrap the result. */ |
| 318 if (TYPE_OVERFLOW_WRAPS (type)) | |
| 111 | 319 res = wrap (res, TYPE_PRECISION (type)); |
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320 |
| 111 | 321 return res; |
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322 } |
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323 |
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324 /* Returns a linear expression for tree T evaluated in PBB. */ |
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325 |
| 111 | 326 static isl_pw_aff * |
| 327 create_pw_aff_from_tree (poly_bb_p pbb, loop_p loop, tree t) | |
|
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328 { |
| 111 | 329 scop_p scop = PBB_SCOP (pbb); |
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330 |
| 111 | 331 t = scalar_evolution_in_region (scop->scop_info->region, loop, t); |
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332 |
| 111 | 333 gcc_assert (!chrec_contains_undetermined (t)); |
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334 gcc_assert (!automatically_generated_chrec_p (t)); |
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335 |
| 111 | 336 return extract_affine (scop, t, isl_set_get_space (pbb->domain)); |
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337 } |
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338 |
| 111 | 339 /* Add conditional statement STMT to pbb. CODE is used as the comparison |
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340 operator. This allows us to invert the condition or to handle |
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341 inequalities. */ |
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342 |
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343 static void |
| 111 | 344 add_condition_to_pbb (poly_bb_p pbb, gcond *stmt, enum tree_code code) |
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345 { |
| 111 | 346 loop_p loop = gimple_bb (stmt)->loop_father; |
| 347 isl_pw_aff *lhs = create_pw_aff_from_tree (pbb, loop, gimple_cond_lhs (stmt)); | |
| 348 isl_pw_aff *rhs = create_pw_aff_from_tree (pbb, loop, gimple_cond_rhs (stmt)); | |
| 349 | |
| 350 isl_set *cond; | |
| 351 switch (code) | |
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352 { |
| 111 | 353 case LT_EXPR: |
| 354 cond = isl_pw_aff_lt_set (lhs, rhs); | |
| 355 break; | |
| 356 | |
| 357 case GT_EXPR: | |
| 358 cond = isl_pw_aff_gt_set (lhs, rhs); | |
| 359 break; | |
| 360 | |
| 361 case LE_EXPR: | |
| 362 cond = isl_pw_aff_le_set (lhs, rhs); | |
| 363 break; | |
| 364 | |
| 365 case GE_EXPR: | |
| 366 cond = isl_pw_aff_ge_set (lhs, rhs); | |
| 367 break; | |
| 368 | |
| 369 case EQ_EXPR: | |
| 370 cond = isl_pw_aff_eq_set (lhs, rhs); | |
| 371 break; | |
| 372 | |
| 373 case NE_EXPR: | |
| 374 cond = isl_pw_aff_ne_set (lhs, rhs); | |
| 375 break; | |
| 376 | |
| 377 default: | |
| 378 gcc_unreachable (); | |
|
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379 } |
| 111 | 380 |
| 381 cond = isl_set_coalesce (cond); | |
| 382 cond = isl_set_set_tuple_id (cond, isl_set_get_tuple_id (pbb->domain)); | |
| 383 pbb->domain = isl_set_coalesce (isl_set_intersect (pbb->domain, cond)); | |
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384 } |
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385 |
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386 /* Add conditions to the domain of PBB. */ |
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387 |
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388 static void |
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389 add_conditions_to_domain (poly_bb_p pbb) |
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390 { |
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391 unsigned int i; |
| 111 | 392 gimple *stmt; |
| 393 gimple_poly_bb_p gbb = PBB_BLACK_BOX (pbb); | |
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394 |
| 111 | 395 if (GBB_CONDITIONS (gbb).is_empty ()) |
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396 return; |
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397 |
| 111 | 398 FOR_EACH_VEC_ELT (GBB_CONDITIONS (gbb), i, stmt) |
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399 switch (gimple_code (stmt)) |
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400 { |
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401 case GIMPLE_COND: |
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402 { |
| 111 | 403 /* Don't constrain on anything else than INTEGER_TYPE. */ |
| 404 if (TREE_CODE (TREE_TYPE (gimple_cond_lhs (stmt))) != INTEGER_TYPE) | |
| 405 break; | |
| 406 | |
| 407 gcond *cond_stmt = as_a <gcond *> (stmt); | |
| 408 enum tree_code code = gimple_cond_code (cond_stmt); | |
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409 |
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410 /* The conditions for ELSE-branches are inverted. */ |
| 111 | 411 if (!GBB_CONDITION_CASES (gbb)[i]) |
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412 code = invert_tree_comparison (code, false); |
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413 |
| 111 | 414 add_condition_to_pbb (pbb, cond_stmt, code); |
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415 break; |
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416 } |
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417 |
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418 default: |
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419 gcc_unreachable (); |
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420 break; |
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421 } |
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422 } |
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423 |
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424 /* Add constraints on the possible values of parameter P from the type |
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425 of P. */ |
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426 |
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427 static void |
| 111 | 428 add_param_constraints (scop_p scop, graphite_dim_t p, tree parameter) |
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429 { |
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430 tree type = TREE_TYPE (parameter); |
| 111 | 431 wide_int min, max; |
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432 |
| 111 | 433 gcc_assert (INTEGRAL_TYPE_P (type) || POINTER_TYPE_P (type)); |
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434 |
| 111 | 435 if (INTEGRAL_TYPE_P (type) |
| 436 && get_range_info (parameter, &min, &max) == VR_RANGE) | |
| 437 ; | |
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438 else |
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439 { |
| 111 | 440 min = wi::min_value (TYPE_PRECISION (type), TYPE_SIGN (type)); |
| 441 max = wi::max_value (TYPE_PRECISION (type), TYPE_SIGN (type)); | |
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442 } |
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443 |
| 111 | 444 isl_space *space = isl_set_get_space (scop->param_context); |
| 445 isl_constraint *c = isl_inequality_alloc (isl_local_space_from_space (space)); | |
| 446 isl_val *v = isl_val_int_from_wi (scop->isl_context, | |
| 447 widest_int::from (min, TYPE_SIGN (type))); | |
| 448 v = isl_val_neg (v); | |
| 449 c = isl_constraint_set_constant_val (c, v); | |
| 450 c = isl_constraint_set_coefficient_si (c, isl_dim_param, p, 1); | |
| 451 scop->param_context = isl_set_coalesce | |
| 452 (isl_set_add_constraint (scop->param_context, c)); | |
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453 |
| 111 | 454 space = isl_set_get_space (scop->param_context); |
| 455 c = isl_inequality_alloc (isl_local_space_from_space (space)); | |
| 456 v = isl_val_int_from_wi (scop->isl_context, | |
| 457 widest_int::from (max, TYPE_SIGN (type))); | |
| 458 c = isl_constraint_set_constant_val (c, v); | |
| 459 c = isl_constraint_set_coefficient_si (c, isl_dim_param, p, -1); | |
| 460 scop->param_context = isl_set_coalesce | |
| 461 (isl_set_add_constraint (scop->param_context, c)); | |
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462 } |
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463 |
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464 /* Add a constrain to the ACCESSES polyhedron for the alias set of |
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465 data reference DR. ACCESSP_NB_DIMS is the dimension of the |
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466 ACCESSES polyhedron, DOM_NB_DIMS is the dimension of the iteration |
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467 domain. */ |
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468 |
| 111 | 469 static isl_map * |
| 470 pdr_add_alias_set (isl_map *acc, dr_info &dri) | |
|
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471 { |
| 111 | 472 isl_constraint *c = isl_equality_alloc |
| 473 (isl_local_space_from_space (isl_map_get_space (acc))); | |
| 474 /* Positive numbers for all alias sets. */ | |
| 475 c = isl_constraint_set_constant_si (c, -dri.alias_set); | |
| 476 c = isl_constraint_set_coefficient_si (c, isl_dim_out, 0, 1); | |
| 477 | |
| 478 return isl_map_add_constraint (acc, c); | |
| 479 } | |
| 480 | |
| 481 /* Assign the affine expression INDEX to the output dimension POS of | |
| 482 MAP and return the result. */ | |
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483 |
| 111 | 484 static isl_map * |
| 485 set_index (isl_map *map, int pos, isl_pw_aff *index) | |
| 486 { | |
| 487 isl_map *index_map; | |
| 488 int len = isl_map_dim (map, isl_dim_out); | |
| 489 isl_id *id; | |
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490 |
| 111 | 491 index_map = isl_map_from_pw_aff (index); |
| 492 index_map = isl_map_insert_dims (index_map, isl_dim_out, 0, pos); | |
| 493 index_map = isl_map_add_dims (index_map, isl_dim_out, len - pos - 1); | |
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494 |
| 111 | 495 id = isl_map_get_tuple_id (map, isl_dim_out); |
| 496 index_map = isl_map_set_tuple_id (index_map, isl_dim_out, id); | |
| 497 id = isl_map_get_tuple_id (map, isl_dim_in); | |
| 498 index_map = isl_map_set_tuple_id (index_map, isl_dim_in, id); | |
| 499 | |
| 500 return isl_map_intersect (map, index_map); | |
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501 } |
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502 |
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503 /* Add to ACCESSES polyhedron equalities defining the access functions |
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504 to the memory. ACCESSP_NB_DIMS is the dimension of the ACCESSES |
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505 polyhedron, DOM_NB_DIMS is the dimension of the iteration domain. |
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506 PBB is the poly_bb_p that contains the data reference DR. */ |
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507 |
| 111 | 508 static isl_map * |
| 509 pdr_add_memory_accesses (isl_map *acc, dr_info &dri) | |
|
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510 { |
| 111 | 511 data_reference_p dr = dri.dr; |
| 512 poly_bb_p pbb = dri.pbb; | |
|
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513 int i, nb_subscripts = DR_NUM_DIMENSIONS (dr); |
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514 scop_p scop = PBB_SCOP (pbb); |
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515 |
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516 for (i = 0; i < nb_subscripts; i++) |
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517 { |
| 111 | 518 isl_pw_aff *aff; |
| 519 tree afn = DR_ACCESS_FN (dr, i); | |
|
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520 |
| 111 | 521 aff = extract_affine (scop, afn, |
| 522 isl_space_domain (isl_map_get_space (acc))); | |
| 523 acc = set_index (acc, nb_subscripts - i , aff); | |
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524 } |
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525 |
| 111 | 526 return isl_map_coalesce (acc); |
| 527 } | |
| 528 | |
| 529 /* Return true when the LOW and HIGH bounds of an array reference REF are valid | |
| 530 to extract constraints on accessed elements of the array. Returning false is | |
| 531 the conservative answer. */ | |
| 532 | |
| 533 static bool | |
| 534 bounds_are_valid (tree ref, tree low, tree high) | |
| 535 { | |
| 536 if (!high) | |
| 537 return false; | |
| 538 | |
| 539 if (!tree_fits_shwi_p (low) | |
| 540 || !tree_fits_shwi_p (high)) | |
| 541 return false; | |
| 542 | |
| 543 /* 1-element arrays at end of structures may extend over | |
| 544 their declared size. */ | |
| 545 if (array_at_struct_end_p (ref) | |
| 546 && operand_equal_p (low, high, 0)) | |
| 547 return false; | |
| 548 | |
| 549 /* Fortran has some arrays where high bound is -1 and low is 0. */ | |
| 550 if (integer_onep (fold_build2 (LT_EXPR, boolean_type_node, high, low))) | |
| 551 return false; | |
| 552 | |
| 553 return true; | |
|
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554 } |
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555 |
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556 /* Add constrains representing the size of the accessed data to the |
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557 ACCESSES polyhedron. ACCESSP_NB_DIMS is the dimension of the |
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558 ACCESSES polyhedron, DOM_NB_DIMS is the dimension of the iteration |
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559 domain. */ |
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560 |
| 111 | 561 static isl_set * |
| 562 pdr_add_data_dimensions (isl_set *subscript_sizes, scop_p scop, | |
| 563 data_reference_p dr) | |
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564 { |
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565 tree ref = DR_REF (dr); |
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566 |
| 111 | 567 int nb_subscripts = DR_NUM_DIMENSIONS (dr); |
| 568 for (int i = nb_subscripts - 1; i >= 0; i--, ref = TREE_OPERAND (ref, 0)) | |
|
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569 { |
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570 if (TREE_CODE (ref) != ARRAY_REF) |
| 111 | 571 return subscript_sizes; |
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572 |
| 111 | 573 tree low = array_ref_low_bound (ref); |
| 574 tree high = array_ref_up_bound (ref); | |
|
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575 |
| 111 | 576 if (!bounds_are_valid (ref, low, high)) |
| 577 continue; | |
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578 |
| 111 | 579 isl_space *space = isl_set_get_space (subscript_sizes); |
| 580 isl_pw_aff *lb = extract_affine_int (low, isl_space_copy (space)); | |
| 581 isl_pw_aff *ub = extract_affine_int (high, isl_space_copy (space)); | |
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582 |
| 111 | 583 /* high >= 0 */ |
| 584 isl_set *valid = isl_pw_aff_nonneg_set (isl_pw_aff_copy (ub)); | |
| 585 valid = isl_set_project_out (valid, isl_dim_set, 0, | |
| 586 isl_set_dim (valid, isl_dim_set)); | |
| 587 scop->param_context = isl_set_coalesce | |
| 588 (isl_set_intersect (scop->param_context, valid)); | |
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589 |
| 111 | 590 isl_aff *aff |
| 591 = isl_aff_zero_on_domain (isl_local_space_from_space (space)); | |
| 592 aff = isl_aff_add_coefficient_si (aff, isl_dim_in, i + 1, 1); | |
| 593 isl_set *univ | |
| 594 = isl_set_universe (isl_space_domain (isl_aff_get_space (aff))); | |
| 595 isl_pw_aff *index = isl_pw_aff_alloc (univ, aff); | |
|
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596 |
| 111 | 597 isl_id *id = isl_set_get_tuple_id (subscript_sizes); |
| 598 lb = isl_pw_aff_set_tuple_id (lb, isl_dim_in, isl_id_copy (id)); | |
| 599 ub = isl_pw_aff_set_tuple_id (ub, isl_dim_in, id); | |
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600 |
| 111 | 601 /* low <= sub_i <= high */ |
| 602 isl_set *lbs = isl_pw_aff_ge_set (isl_pw_aff_copy (index), lb); | |
| 603 isl_set *ubs = isl_pw_aff_le_set (index, ub); | |
| 604 subscript_sizes = isl_set_intersect (subscript_sizes, lbs); | |
| 605 subscript_sizes = isl_set_intersect (subscript_sizes, ubs); | |
| 606 } | |
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607 |
| 111 | 608 return isl_set_coalesce (subscript_sizes); |
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609 } |
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610 |
| 111 | 611 /* Build data accesses for DRI. */ |
| 612 | |
| 613 static void | |
| 614 build_poly_dr (dr_info &dri) | |
| 615 { | |
| 616 isl_map *acc; | |
| 617 isl_set *subscript_sizes; | |
| 618 poly_bb_p pbb = dri.pbb; | |
| 619 data_reference_p dr = dri.dr; | |
| 620 scop_p scop = PBB_SCOP (pbb); | |
| 621 isl_id *id = isl_id_for_dr (scop); | |
| 622 | |
| 623 { | |
| 624 isl_space *dc = isl_set_get_space (pbb->domain); | |
| 625 int nb_out = 1 + DR_NUM_DIMENSIONS (dr); | |
| 626 isl_space *space = isl_space_add_dims (isl_space_from_domain (dc), | |
| 627 isl_dim_out, nb_out); | |
|
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628 |
| 111 | 629 acc = isl_map_universe (space); |
| 630 acc = isl_map_set_tuple_id (acc, isl_dim_out, isl_id_copy (id)); | |
| 631 } | |
| 632 | |
| 633 acc = pdr_add_alias_set (acc, dri); | |
| 634 acc = pdr_add_memory_accesses (acc, dri); | |
| 635 | |
| 636 { | |
| 637 int nb = 1 + DR_NUM_DIMENSIONS (dr); | |
| 638 isl_space *space = isl_space_set_alloc (scop->isl_context, 0, nb); | |
| 639 | |
| 640 space = isl_space_set_tuple_id (space, isl_dim_set, id); | |
| 641 subscript_sizes = isl_set_nat_universe (space); | |
| 642 subscript_sizes = isl_set_fix_si (subscript_sizes, isl_dim_set, 0, | |
| 643 dri.alias_set); | |
| 644 subscript_sizes = pdr_add_data_dimensions (subscript_sizes, scop, dr); | |
| 645 } | |
| 646 | |
| 647 new_poly_dr (pbb, DR_STMT (dr), DR_IS_READ (dr) ? PDR_READ : PDR_WRITE, | |
| 648 acc, subscript_sizes); | |
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649 } |
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650 |
| 111 | 651 static void |
| 652 build_poly_sr_1 (poly_bb_p pbb, gimple *stmt, tree var, enum poly_dr_type kind, | |
| 653 isl_map *acc, isl_set *subscript_sizes) | |
|
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654 { |
| 111 | 655 scop_p scop = PBB_SCOP (pbb); |
| 656 /* Each scalar variables has a unique alias set number starting from | |
| 657 the maximum alias set assigned to a dr. */ | |
| 658 int alias_set = scop->max_alias_set + SSA_NAME_VERSION (var); | |
| 659 subscript_sizes = isl_set_fix_si (subscript_sizes, isl_dim_set, 0, | |
| 660 alias_set); | |
|
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661 |
| 111 | 662 /* Add a constrain to the ACCESSES polyhedron for the alias set of |
| 663 data reference DR. */ | |
| 664 isl_constraint *c | |
| 665 = isl_equality_alloc (isl_local_space_from_space (isl_map_get_space (acc))); | |
| 666 c = isl_constraint_set_constant_si (c, -alias_set); | |
| 667 c = isl_constraint_set_coefficient_si (c, isl_dim_out, 0, 1); | |
|
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668 |
| 111 | 669 new_poly_dr (pbb, stmt, kind, isl_map_add_constraint (acc, c), |
| 670 subscript_sizes); | |
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671 } |
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672 |
| 111 | 673 /* Record all cross basic block scalar variables in PBB. */ |
|
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674 |
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675 static void |
| 111 | 676 build_poly_sr (poly_bb_p pbb) |
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677 { |
| 111 | 678 scop_p scop = PBB_SCOP (pbb); |
| 679 gimple_poly_bb_p gbb = PBB_BLACK_BOX (pbb); | |
| 680 vec<scalar_use> &reads = gbb->read_scalar_refs; | |
| 681 vec<tree> &writes = gbb->write_scalar_refs; | |
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682 |
| 111 | 683 isl_space *dc = isl_set_get_space (pbb->domain); |
| 684 int nb_out = 1; | |
| 685 isl_space *space = isl_space_add_dims (isl_space_from_domain (dc), | |
| 686 isl_dim_out, nb_out); | |
| 687 isl_id *id = isl_id_for_dr (scop); | |
| 688 space = isl_space_set_tuple_id (space, isl_dim_set, isl_id_copy (id)); | |
| 689 isl_map *acc = isl_map_universe (isl_space_copy (space)); | |
| 690 acc = isl_map_set_tuple_id (acc, isl_dim_out, id); | |
| 691 isl_set *subscript_sizes = isl_set_nat_universe (space); | |
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692 |
| 111 | 693 int i; |
| 694 tree var; | |
| 695 FOR_EACH_VEC_ELT (writes, i, var) | |
| 696 build_poly_sr_1 (pbb, SSA_NAME_DEF_STMT (var), var, PDR_WRITE, | |
| 697 isl_map_copy (acc), isl_set_copy (subscript_sizes)); | |
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698 |
| 111 | 699 scalar_use *use; |
| 700 FOR_EACH_VEC_ELT (reads, i, use) | |
| 701 build_poly_sr_1 (pbb, use->first, use->second, PDR_READ, isl_map_copy (acc), | |
| 702 isl_set_copy (subscript_sizes)); | |
| 703 | |
| 704 isl_map_free (acc); | |
| 705 isl_set_free (subscript_sizes); | |
|
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706 } |
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707 |
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708 /* Build data references in SCOP. */ |
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709 |
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710 static void |
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711 build_scop_drs (scop_p scop) |
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712 { |
| 111 | 713 int i; |
| 714 dr_info *dri; | |
| 715 FOR_EACH_VEC_ELT (scop->drs, i, dri) | |
| 716 build_poly_dr (*dri); | |
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717 |
| 111 | 718 poly_bb_p pbb; |
| 719 FOR_EACH_VEC_ELT (scop->pbbs, i, pbb) | |
| 720 build_poly_sr (pbb); | |
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721 } |
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722 |
| 111 | 723 /* Add to the iteration DOMAIN one extra dimension for LOOP->num. */ |
|
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724 |
| 111 | 725 static isl_set * |
| 726 add_iter_domain_dimension (__isl_take isl_set *domain, loop_p loop, scop_p scop) | |
|
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727 { |
| 111 | 728 int loop_index = isl_set_dim (domain, isl_dim_set); |
| 729 domain = isl_set_add_dims (domain, isl_dim_set, 1); | |
| 730 char name[50]; | |
| 731 snprintf (name, sizeof(name), "i%d", loop->num); | |
| 732 isl_id *label = isl_id_alloc (scop->isl_context, name, NULL); | |
| 733 return isl_set_set_dim_id (domain, isl_dim_set, loop_index, label); | |
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734 } |
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735 |
| 111 | 736 /* Add constraints to DOMAIN for each loop from LOOP up to CONTEXT. */ |
|
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737 |
| 111 | 738 static isl_set * |
| 739 add_loop_constraints (scop_p scop, __isl_take isl_set *domain, loop_p loop, | |
| 740 loop_p context) | |
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741 { |
| 111 | 742 if (loop == context) |
| 743 return domain; | |
| 744 const sese_l ®ion = scop->scop_info->region; | |
| 745 if (!loop_in_sese_p (loop, region)) | |
| 746 return domain; | |
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747 |
| 111 | 748 /* Recursion all the way up to the context loop. */ |
| 749 domain = add_loop_constraints (scop, domain, loop_outer (loop), context); | |
|
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750 |
| 111 | 751 /* Then, build constraints over the loop in post-order: outer to inner. */ |
|
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752 |
| 111 | 753 int loop_index = isl_set_dim (domain, isl_dim_set); |
| 754 if (dump_file) | |
| 755 fprintf (dump_file, "[sese-to-poly] adding one extra dimension to the " | |
| 756 "domain for loop_%d.\n", loop->num); | |
| 757 domain = add_iter_domain_dimension (domain, loop, scop); | |
| 758 isl_space *space = isl_set_get_space (domain); | |
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759 |
| 111 | 760 /* 0 <= loop_i */ |
| 761 isl_local_space *ls = isl_local_space_from_space (isl_space_copy (space)); | |
| 762 isl_constraint *c = isl_inequality_alloc (ls); | |
| 763 c = isl_constraint_set_coefficient_si (c, isl_dim_set, loop_index, 1); | |
| 764 if (dump_file) | |
| 765 { | |
| 766 fprintf (dump_file, "[sese-to-poly] adding constraint to the domain: "); | |
| 767 print_isl_constraint (dump_file, c); | |
| 768 } | |
| 769 domain = isl_set_add_constraint (domain, c); | |
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770 |
| 111 | 771 tree nb_iters = number_of_latch_executions (loop); |
| 772 if (TREE_CODE (nb_iters) == INTEGER_CST) | |
|
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773 { |
| 111 | 774 /* loop_i <= cst_nb_iters */ |
| 775 isl_local_space *ls = isl_local_space_from_space (space); | |
| 776 isl_constraint *c = isl_inequality_alloc (ls); | |
| 777 c = isl_constraint_set_coefficient_si (c, isl_dim_set, loop_index, -1); | |
| 778 isl_val *v | |
| 779 = isl_val_int_from_wi (scop->isl_context, wi::to_widest (nb_iters)); | |
| 780 c = isl_constraint_set_constant_val (c, v); | |
| 781 return isl_set_add_constraint (domain, c); | |
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782 } |
| 111 | 783 /* loop_i <= expr_nb_iters */ |
| 784 gcc_assert (!chrec_contains_undetermined (nb_iters)); | |
| 785 nb_iters = scalar_evolution_in_region (region, loop, nb_iters); | |
| 786 gcc_assert (!chrec_contains_undetermined (nb_iters)); | |
|
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787 |
| 111 | 788 isl_pw_aff *aff_nb_iters = extract_affine (scop, nb_iters, |
| 789 isl_space_copy (space)); | |
| 790 isl_set *valid = isl_pw_aff_nonneg_set (isl_pw_aff_copy (aff_nb_iters)); | |
| 791 valid = isl_set_project_out (valid, isl_dim_set, 0, | |
| 792 isl_set_dim (valid, isl_dim_set)); | |
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793 |
| 111 | 794 if (valid) |
| 795 scop->param_context = isl_set_intersect (scop->param_context, valid); | |
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796 |
| 111 | 797 ls = isl_local_space_from_space (isl_space_copy (space)); |
| 798 isl_aff *loop_i = isl_aff_set_coefficient_si (isl_aff_zero_on_domain (ls), | |
| 799 isl_dim_in, loop_index, 1); | |
| 800 isl_set *le = isl_pw_aff_le_set (isl_pw_aff_from_aff (loop_i), | |
| 801 isl_pw_aff_copy (aff_nb_iters)); | |
| 802 if (dump_file) | |
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803 { |
| 111 | 804 fprintf (dump_file, "[sese-to-poly] adding constraint to the domain: "); |
| 805 print_isl_set (dump_file, le); | |
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806 } |
| 111 | 807 domain = isl_set_intersect (domain, le); |
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808 |
| 111 | 809 widest_int nit; |
| 810 if (!max_stmt_executions (loop, &nit)) | |
|
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811 { |
| 111 | 812 isl_pw_aff_free (aff_nb_iters); |
| 813 isl_space_free (space); | |
| 814 return domain; | |
|
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815 } |
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816 |
| 111 | 817 /* NIT is an upper bound to NB_ITERS: "NIT >= NB_ITERS", although we |
| 818 do not know whether the loop executes at least once. */ | |
| 819 --nit; | |
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820 |
| 111 | 821 isl_pw_aff *approx = extract_affine_wi (nit, isl_space_copy (space)); |
| 822 isl_set *x = isl_pw_aff_ge_set (approx, aff_nb_iters); | |
| 823 x = isl_set_project_out (x, isl_dim_set, 0, | |
| 824 isl_set_dim (x, isl_dim_set)); | |
| 825 scop->param_context = isl_set_intersect (scop->param_context, x); | |
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826 |
| 111 | 827 ls = isl_local_space_from_space (space); |
| 828 c = isl_inequality_alloc (ls); | |
| 829 c = isl_constraint_set_coefficient_si (c, isl_dim_set, loop_index, -1); | |
| 830 isl_val *v = isl_val_int_from_wi (scop->isl_context, nit); | |
| 831 c = isl_constraint_set_constant_val (c, v); | |
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832 |
| 111 | 833 if (dump_file) |
|
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834 { |
| 111 | 835 fprintf (dump_file, "[sese-to-poly] adding constraint to the domain: "); |
| 836 print_isl_constraint (dump_file, c); | |
|
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837 } |
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838 |
| 111 | 839 return isl_set_add_constraint (domain, c); |
|
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840 } |
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841 |
| 111 | 842 /* Builds the original iteration domains for each pbb in the SCOP. */ |
|
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843 |
| 111 | 844 static int |
| 845 build_iteration_domains (scop_p scop, __isl_keep isl_set *context, | |
| 846 int index, loop_p context_loop) | |
|
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847 { |
| 111 | 848 loop_p current = pbb_loop (scop->pbbs[index]); |
| 849 isl_set *domain = isl_set_copy (context); | |
| 850 domain = add_loop_constraints (scop, domain, current, context_loop); | |
| 851 const sese_l ®ion = scop->scop_info->region; | |
|
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852 |
| 111 | 853 int i; |
| 854 poly_bb_p pbb; | |
| 855 FOR_EACH_VEC_ELT_FROM (scop->pbbs, i, pbb, index) | |
| 856 { | |
| 857 loop_p loop = pbb_loop (pbb); | |
| 858 if (current == loop) | |
| 859 { | |
| 860 pbb->iterators = isl_set_copy (domain); | |
| 861 pbb->domain = isl_set_copy (domain); | |
| 862 pbb->domain = isl_set_set_tuple_id (pbb->domain, | |
| 863 isl_id_for_pbb (scop, pbb)); | |
| 864 add_conditions_to_domain (pbb); | |
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|
865 |
| 111 | 866 if (dump_file) |
| 867 { | |
| 868 fprintf (dump_file, "[sese-to-poly] set pbb_%d->domain: ", | |
| 869 pbb_index (pbb)); | |
| 870 print_isl_set (dump_file, domain); | |
| 871 } | |
| 872 continue; | |
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873 } |
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874 |
| 111 | 875 while (loop_in_sese_p (loop, region) |
| 876 && current != loop) | |
| 877 loop = loop_outer (loop); | |
| 878 | |
| 879 if (current != loop) | |
| 880 { | |
| 881 /* A statement in a different loop nest than CURRENT loop. */ | |
| 882 isl_set_free (domain); | |
| 883 return i; | |
| 884 } | |
| 885 | |
| 886 /* A statement nested in the CURRENT loop. */ | |
| 887 i = build_iteration_domains (scop, domain, i, current); | |
| 888 i--; | |
| 889 } | |
| 890 | |
| 891 isl_set_free (domain); | |
| 892 return i; | |
|
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893 } |
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894 |
| 111 | 895 /* Assign dimension for each parameter in SCOP and add constraints for the |
| 896 parameters. */ | |
|
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897 |
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898 static void |
| 111 | 899 build_scop_context (scop_p scop) |
|
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900 { |
| 111 | 901 sese_info_p region = scop->scop_info; |
| 902 unsigned nbp = sese_nb_params (region); | |
| 903 isl_space *space = isl_space_set_alloc (scop->isl_context, nbp, 0); | |
|
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904 |
| 111 | 905 unsigned i; |
| 906 tree e; | |
| 907 FOR_EACH_VEC_ELT (region->params, i, e) | |
| 908 space = isl_space_set_dim_id (space, isl_dim_param, i, | |
| 909 isl_id_for_ssa_name (scop, e)); | |
|
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910 |
| 111 | 911 scop->param_context = isl_set_universe (space); |
|
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912 |
| 111 | 913 FOR_EACH_VEC_ELT (region->params, i, e) |
| 914 add_param_constraints (scop, i, e); | |
|
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915 } |
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916 |
| 111 | 917 /* Return true when loop A is nested in loop B. */ |
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918 |
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919 static bool |
| 111 | 920 nested_in (loop_p a, loop_p b) |
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921 { |
| 111 | 922 return b == find_common_loop (a, b); |
| 923 } | |
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924 |
| 111 | 925 /* Return the loop at a specific SCOP->pbbs[*INDEX]. */ |
| 926 static loop_p | |
| 927 loop_at (scop_p scop, int *index) | |
| 928 { | |
| 929 return pbb_loop (scop->pbbs[*index]); | |
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930 } |
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931 |
| 111 | 932 /* Return the index of any pbb belonging to loop or a subloop of A. */ |
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933 |
| 111 | 934 static int |
| 935 index_outermost_in_loop (loop_p a, scop_p scop) | |
| 936 { | |
| 937 int i, outermost = -1; | |
| 938 int last_depth = -1; | |
| 939 poly_bb_p pbb; | |
| 940 FOR_EACH_VEC_ELT (scop->pbbs, i, pbb) | |
| 941 if (nested_in (pbb_loop (pbb), a) | |
| 942 && (last_depth == -1 | |
| 943 || last_depth > (int) loop_depth (pbb_loop (pbb)))) | |
| 944 { | |
| 945 outermost = i; | |
| 946 last_depth = loop_depth (pbb_loop (pbb)); | |
| 947 } | |
| 948 return outermost; | |
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949 } |
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950 |
| 111 | 951 /* Return the index of any pbb belonging to loop or a subloop of A. */ |
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952 |
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953 static int |
| 111 | 954 index_pbb_in_loop (loop_p a, scop_p scop) |
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955 { |
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956 int i; |
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957 poly_bb_p pbb; |
| 111 | 958 FOR_EACH_VEC_ELT (scop->pbbs, i, pbb) |
| 959 if (pbb_loop (pbb) == a) | |
| 960 return i; | |
| 961 return -1; | |
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962 } |
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963 |
| 111 | 964 static poly_bb_p |
| 965 outermost_pbb_in (loop_p loop, scop_p scop) | |
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966 { |
| 111 | 967 int x = index_pbb_in_loop (loop, scop); |
| 968 if (x == -1) | |
| 969 x = index_outermost_in_loop (loop, scop); | |
| 970 return scop->pbbs[x]; | |
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971 } |
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972 |
| 111 | 973 static isl_schedule * |
| 974 add_in_sequence (__isl_take isl_schedule *a, __isl_take isl_schedule *b) | |
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975 { |
| 111 | 976 gcc_assert (a || b); |
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977 |
| 111 | 978 if (!a) |
| 979 return b; | |
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980 |
| 111 | 981 if (!b) |
| 982 return a; | |
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983 |
| 111 | 984 return isl_schedule_sequence (a, b); |
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985 } |
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986 |
| 111 | 987 struct map_to_dimension_data { |
| 988 int n; | |
| 989 isl_union_pw_multi_aff *res; | |
| 990 }; | |
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991 |
| 111 | 992 /* Create a function that maps the elements of SET to its N-th dimension and add |
| 993 it to USER->res. */ | |
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994 |
| 111 | 995 static isl_stat |
| 996 add_outer_projection (__isl_take isl_set *set, void *user) | |
| 997 { | |
| 998 struct map_to_dimension_data *data = (struct map_to_dimension_data *) user; | |
| 999 int dim = isl_set_dim (set, isl_dim_set); | |
| 1000 isl_space *space = isl_set_get_space (set); | |
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1001 |
| 111 | 1002 gcc_assert (dim >= data->n); |
| 1003 isl_pw_multi_aff *pma | |
| 1004 = isl_pw_multi_aff_project_out_map (space, isl_dim_set, data->n, | |
| 1005 dim - data->n); | |
| 1006 data->res = isl_union_pw_multi_aff_add_pw_multi_aff (data->res, pma); | |
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1007 |
| 111 | 1008 isl_set_free (set); |
| 1009 return isl_stat_ok; | |
|
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1010 } |
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1011 |
| 111 | 1012 /* Return SET in which all inner dimensions above N are removed. */ |
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1013 |
| 111 | 1014 static isl_multi_union_pw_aff * |
| 1015 outer_projection_mupa (__isl_take isl_union_set *set, int n) | |
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1016 { |
| 111 | 1017 gcc_assert (n >= 0); |
| 1018 gcc_assert (set); | |
| 1019 gcc_assert (!isl_union_set_is_empty (set)); | |
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1020 |
| 111 | 1021 isl_space *space = isl_union_set_get_space (set); |
| 1022 isl_union_pw_multi_aff *pwaff = isl_union_pw_multi_aff_empty (space); | |
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1023 |
| 111 | 1024 struct map_to_dimension_data data = {n, pwaff}; |
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1025 |
| 111 | 1026 if (isl_union_set_foreach_set (set, &add_outer_projection, &data) < 0) |
| 1027 data.res = isl_union_pw_multi_aff_free (data.res); | |
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1028 |
| 111 | 1029 isl_union_set_free (set); |
| 1030 return isl_multi_union_pw_aff_from_union_pw_multi_aff (data.res); | |
|
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1031 } |
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1032 |
| 111 | 1033 /* Embed SCHEDULE in the constraints of the LOOP domain. */ |
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1034 |
| 111 | 1035 static isl_schedule * |
| 1036 add_loop_schedule (__isl_take isl_schedule *schedule, loop_p loop, | |
| 1037 scop_p scop) | |
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1038 { |
| 111 | 1039 poly_bb_p pbb = outermost_pbb_in (loop, scop); |
| 1040 isl_set *iterators = pbb->iterators; | |
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1041 |
| 111 | 1042 int empty = isl_set_is_empty (iterators); |
| 1043 if (empty < 0 || empty) | |
| 1044 return empty < 0 ? isl_schedule_free (schedule) : schedule; | |
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1045 |
| 111 | 1046 isl_union_set *domain = isl_schedule_get_domain (schedule); |
| 1047 /* We cannot apply an empty domain to pbbs in this loop so return early. */ | |
| 1048 if (isl_union_set_is_empty (domain)) | |
| 1049 { | |
| 1050 isl_union_set_free (domain); | |
| 1051 return schedule; | |
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1052 } |
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1053 |
| 111 | 1054 isl_space *space = isl_set_get_space (iterators); |
| 1055 int loop_index = isl_space_dim (space, isl_dim_set) - 1; | |
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1056 |
| 111 | 1057 loop_p ploop = pbb_loop (pbb); |
| 1058 while (loop != ploop) | |
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1059 { |
| 111 | 1060 --loop_index; |
| 1061 ploop = loop_outer (ploop); | |
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1062 } |
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1063 |
| 111 | 1064 isl_local_space *ls = isl_local_space_from_space (space); |
| 1065 isl_aff *aff = isl_aff_var_on_domain (ls, isl_dim_set, loop_index); | |
| 1066 isl_multi_aff *prefix = isl_multi_aff_from_aff (aff); | |
| 1067 char name[50]; | |
| 1068 snprintf (name, sizeof(name), "L_%d", loop->num); | |
| 1069 isl_id *label = isl_id_alloc (isl_schedule_get_ctx (schedule), | |
| 1070 name, NULL); | |
| 1071 prefix = isl_multi_aff_set_tuple_id (prefix, isl_dim_out, label); | |
| 1072 | |
| 1073 int n = isl_multi_aff_dim (prefix, isl_dim_in); | |
| 1074 isl_multi_union_pw_aff *mupa = outer_projection_mupa (domain, n); | |
| 1075 mupa = isl_multi_union_pw_aff_apply_multi_aff (mupa, prefix); | |
| 1076 return isl_schedule_insert_partial_schedule (schedule, mupa); | |
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1077 } |
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1078 |
| 111 | 1079 /* Build schedule for the pbb at INDEX. */ |
|
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1080 |
| 111 | 1081 static isl_schedule * |
| 1082 build_schedule_pbb (scop_p scop, int *index) | |
| 1083 { | |
| 1084 poly_bb_p pbb = scop->pbbs[*index]; | |
| 1085 ++*index; | |
| 1086 isl_set *domain = isl_set_copy (pbb->domain); | |
| 1087 isl_union_set *ud = isl_union_set_from_set (domain); | |
| 1088 return isl_schedule_from_domain (ud); | |
|
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1089 } |
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1090 |
| 111 | 1091 static isl_schedule *build_schedule_loop_nest (scop_p, int *, loop_p); |
|
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1092 |
| 111 | 1093 /* Build the schedule of the loop containing the SCOP pbb at INDEX. */ |
|
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1094 |
| 111 | 1095 static isl_schedule * |
| 1096 build_schedule_loop (scop_p scop, int *index) | |
| 1097 { | |
| 1098 int max = scop->pbbs.length (); | |
| 1099 gcc_assert (*index < max); | |
| 1100 loop_p loop = loop_at (scop, index); | |
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1101 |
| 111 | 1102 isl_schedule *s = NULL; |
| 1103 while (nested_in (loop_at (scop, index), loop)) | |
| 1104 { | |
| 1105 if (loop == loop_at (scop, index)) | |
| 1106 s = add_in_sequence (s, build_schedule_pbb (scop, index)); | |
| 1107 else | |
| 1108 s = add_in_sequence (s, build_schedule_loop_nest (scop, index, loop)); | |
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1109 |
| 111 | 1110 if (*index == max) |
| 1111 break; | |
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1112 } |
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1113 |
| 111 | 1114 return add_loop_schedule (s, loop, scop); |
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1115 } |
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1116 |
| 111 | 1117 /* S is the schedule of the loop LOOP. Embed the schedule S in all outer loops. |
| 1118 When CONTEXT_LOOP is null, embed the schedule in all loops contained in the | |
| 1119 SCOP surrounding LOOP. When CONTEXT_LOOP is non null, only embed S in the | |
| 1120 maximal loop nest contained within CONTEXT_LOOP. */ | |
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1121 |
| 111 | 1122 static isl_schedule * |
| 1123 embed_in_surrounding_loops (__isl_take isl_schedule *s, scop_p scop, | |
| 1124 loop_p loop, int *index, loop_p context_loop) | |
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1125 { |
| 111 | 1126 loop_p outer = loop_outer (loop); |
| 1127 sese_l region = scop->scop_info->region; | |
| 1128 if (context_loop == outer | |
| 1129 || !loop_in_sese_p (outer, region)) | |
| 1130 return s; | |
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1131 |
| 111 | 1132 int max = scop->pbbs.length (); |
| 1133 if (*index == max | |
| 1134 || (context_loop && !nested_in (loop_at (scop, index), context_loop)) | |
| 1135 || (!context_loop | |
| 1136 && !loop_in_sese_p (find_common_loop (outer, loop_at (scop, index)), | |
| 1137 region))) | |
| 1138 return embed_in_surrounding_loops (add_loop_schedule (s, outer, scop), | |
| 1139 scop, outer, index, context_loop); | |
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1140 |
| 111 | 1141 bool a_pbb; |
| 1142 while ((a_pbb = (outer == loop_at (scop, index))) | |
| 1143 || nested_in (loop_at (scop, index), outer)) | |
| 1144 { | |
| 1145 if (a_pbb) | |
| 1146 s = add_in_sequence (s, build_schedule_pbb (scop, index)); | |
| 1147 else | |
| 1148 s = add_in_sequence (s, build_schedule_loop (scop, index)); | |
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1149 |
| 111 | 1150 if (*index == max) |
| 1151 break; | |
| 1152 } | |
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1153 |
| 111 | 1154 /* We reached the end of the OUTER loop: embed S in OUTER. */ |
| 1155 return embed_in_surrounding_loops (add_loop_schedule (s, outer, scop), scop, | |
| 1156 outer, index, context_loop); | |
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1157 } |
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1158 |
| 111 | 1159 /* Build schedule for the full loop nest containing the pbb at INDEX. When |
| 1160 CONTEXT_LOOP is null, build the schedule of all loops contained in the SCOP | |
| 1161 surrounding the pbb. When CONTEXT_LOOP is non null, only build the maximal loop | |
| 1162 nest contained within CONTEXT_LOOP. */ | |
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1163 |
| 111 | 1164 static isl_schedule * |
| 1165 build_schedule_loop_nest (scop_p scop, int *index, loop_p context_loop) | |
| 1166 { | |
| 1167 gcc_assert (*index != (int) scop->pbbs.length ()); | |
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1168 |
| 111 | 1169 loop_p loop = loop_at (scop, index); |
| 1170 isl_schedule *s = build_schedule_loop (scop, index); | |
| 1171 return embed_in_surrounding_loops (s, scop, loop, index, context_loop); | |
| 1172 } | |
| 1173 | |
| 1174 /* Build the schedule of the SCOP. */ | |
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1175 |
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1176 static void |
| 111 | 1177 build_original_schedule (scop_p scop) |
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1178 { |
| 111 | 1179 int i = 0; |
| 1180 int n = scop->pbbs.length (); | |
| 1181 while (i < n) | |
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1182 { |
| 111 | 1183 poly_bb_p pbb = scop->pbbs[i]; |
| 1184 isl_schedule *s = NULL; | |
| 1185 if (!loop_in_sese_p (pbb_loop (pbb), scop->scop_info->region)) | |
| 1186 s = build_schedule_pbb (scop, &i); | |
| 1187 else | |
| 1188 s = build_schedule_loop_nest (scop, &i, NULL); | |
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1189 |
| 111 | 1190 scop->original_schedule = add_in_sequence (scop->original_schedule, s); |
| 1191 } | |
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1192 |
| 111 | 1193 if (dump_file) |
| 1194 { | |
| 1195 fprintf (dump_file, "[sese-to-poly] original schedule:\n"); | |
| 1196 print_isl_schedule (dump_file, scop->original_schedule); | |
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1197 } |
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1198 } |
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1199 |
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1200 /* Builds the polyhedral representation for a SESE region. */ |
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1201 |
| 111 | 1202 bool |
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1203 build_poly_scop (scop_p scop) |
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1204 { |
| 111 | 1205 int old_err = isl_options_get_on_error (scop->isl_context); |
| 1206 isl_options_set_on_error (scop->isl_context, ISL_ON_ERROR_CONTINUE); | |
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1207 |
| 111 | 1208 build_scop_context (scop); |
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1209 |
| 111 | 1210 unsigned i = 0; |
| 1211 unsigned n = scop->pbbs.length (); | |
| 1212 while (i < n) | |
| 1213 i = build_iteration_domains (scop, scop->param_context, i, NULL); | |
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1214 |
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1215 build_scop_drs (scop); |
| 111 | 1216 build_original_schedule (scop); |
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1217 |
| 111 | 1218 enum isl_error err = isl_ctx_last_error (scop->isl_context); |
| 1219 isl_ctx_reset_error (scop->isl_context); | |
| 1220 isl_options_set_on_error (scop->isl_context, old_err); | |
| 1221 if (err != isl_error_none) | |
| 1222 dump_printf (MSG_MISSED_OPTIMIZATION, | |
| 1223 "ISL error while building poly scop\n"); | |
| 1224 | |
| 1225 return err == isl_error_none; | |
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1226 } |
| 111 | 1227 #endif /* HAVE_isl */ |