Chris Forbes | cc5697f | 2019-01-30 11:54:08 -0800 | [diff] [blame] | 1 | // Copyright (c) 2018 Google LLC. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | #include <string> |
| 16 | |
| 17 | #include "effcee/effcee.h" |
| 18 | #include "gmock/gmock.h" |
| 19 | #include "test/opt/pass_fixture.h" |
| 20 | |
| 21 | namespace spvtools { |
| 22 | namespace opt { |
| 23 | namespace { |
| 24 | |
| 25 | using UnswitchTest = PassTest<::testing::Test>; |
| 26 | |
| 27 | /* |
| 28 | Generated from the following GLSL + --eliminate-local-multi-store |
| 29 | |
| 30 | #version 450 core |
| 31 | uniform vec4 c; |
| 32 | void main() { |
| 33 | int i = 0; |
| 34 | int j = 0; |
| 35 | bool cond = c[0] == 0; |
| 36 | for (; i < 10; i++, j++) { |
| 37 | if (cond) { |
| 38 | i++; |
| 39 | } |
| 40 | else { |
| 41 | j++; |
| 42 | } |
| 43 | } |
| 44 | } |
| 45 | */ |
| 46 | TEST_F(UnswitchTest, SimpleUnswitch) { |
| 47 | const std::string text = R"( |
| 48 | ; CHECK: [[cst_cond:%\w+]] = OpFOrdEqual |
| 49 | ; CHECK-NEXT: OpSelectionMerge [[if_merge:%\w+]] None |
| 50 | ; CHECK-NEXT: OpBranchConditional [[cst_cond]] [[loop_t:%\w+]] [[loop_f:%\w+]] |
| 51 | |
| 52 | ; Loop specialized for false. |
| 53 | ; CHECK: [[loop_f]] = OpLabel |
| 54 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 55 | ; CHECK: [[loop]] = OpLabel |
| 56 | ; CHECK-NEXT: [[phi_i:%\w+]] = OpPhi %int %int_0 [[loop_f]] [[iv_i:%\w+]] [[continue:%\w+]] |
| 57 | ; CHECK-NEXT: [[phi_j:%\w+]] = OpPhi %int %int_0 [[loop_f]] [[iv_j:%\w+]] [[continue]] |
| 58 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 59 | ; CHECK: [[loop_exit:%\w+]] = OpSLessThan {{%\w+}} [[phi_i]] {{%\w+}} |
| 60 | ; CHECK-NEXT: OpBranchConditional [[loop_exit]] [[loop_body:%\w+]] [[merge]] |
| 61 | ; [[loop_body]] = OpLabel |
| 62 | ; CHECK: OpSelectionMerge [[sel_merge:%\w+]] None |
| 63 | ; CHECK: OpBranchConditional %false [[bb1:%\w+]] [[bb2:%\w+]] |
| 64 | ; CHECK: [[bb2]] = OpLabel |
| 65 | ; CHECK-NEXT: [[inc_j:%\w+]] = OpIAdd %int [[phi_j]] %int_1 |
| 66 | ; CHECK-NEXT: OpBranch [[sel_merge]] |
| 67 | ; CHECK: [[bb1]] = OpLabel |
| 68 | ; CHECK-NEXT: [[inc_i:%\w+]] = OpIAdd %int [[phi_i]] %int_1 |
| 69 | ; CHECK-NEXT: OpBranch [[sel_merge]] |
| 70 | ; CHECK: [[sel_merge]] = OpLabel |
| 71 | ; CHECK: OpBranch [[if_merge]] |
| 72 | |
| 73 | ; Loop specialized for true. |
| 74 | ; CHECK: [[loop_t]] = OpLabel |
| 75 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 76 | ; CHECK: [[loop]] = OpLabel |
| 77 | ; CHECK-NEXT: [[phi_i:%\w+]] = OpPhi %int %int_0 [[loop_t]] [[iv_i:%\w+]] [[continue:%\w+]] |
| 78 | ; CHECK-NEXT: [[phi_j:%\w+]] = OpPhi %int %int_0 [[loop_t]] [[iv_j:%\w+]] [[continue]] |
| 79 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 80 | ; CHECK: [[loop_exit:%\w+]] = OpSLessThan {{%\w+}} [[phi_i]] {{%\w+}} |
| 81 | ; CHECK-NEXT: OpBranchConditional [[loop_exit]] [[loop_body:%\w+]] [[merge]] |
| 82 | ; [[loop_body]] = OpLabel |
| 83 | ; CHECK: OpSelectionMerge [[sel_merge:%\w+]] None |
| 84 | ; CHECK: OpBranchConditional %true [[bb1:%\w+]] [[bb2:%\w+]] |
| 85 | ; CHECK: [[bb1]] = OpLabel |
| 86 | ; CHECK-NEXT: [[inc_i:%\w+]] = OpIAdd %int [[phi_i]] %int_1 |
| 87 | ; CHECK-NEXT: OpBranch [[sel_merge]] |
| 88 | ; CHECK: [[bb2]] = OpLabel |
| 89 | ; CHECK-NEXT: [[inc_j:%\w+]] = OpIAdd %int [[phi_j]] %int_1 |
| 90 | ; CHECK-NEXT: OpBranch [[sel_merge]] |
| 91 | ; CHECK: [[sel_merge]] = OpLabel |
| 92 | ; CHECK: OpBranch [[if_merge]] |
| 93 | |
| 94 | ; CHECK: [[if_merge]] = OpLabel |
| 95 | ; CHECK-NEXT: OpReturn |
| 96 | |
| 97 | OpCapability Shader |
| 98 | %1 = OpExtInstImport "GLSL.std.450" |
| 99 | OpMemoryModel Logical GLSL450 |
| 100 | OpEntryPoint Fragment %main "main" |
| 101 | OpExecutionMode %main OriginLowerLeft |
| 102 | OpSource GLSL 450 |
| 103 | OpName %main "main" |
| 104 | OpName %c "c" |
| 105 | OpDecorate %c Location 0 |
| 106 | OpDecorate %c DescriptorSet 0 |
| 107 | %void = OpTypeVoid |
| 108 | %3 = OpTypeFunction %void |
| 109 | %int = OpTypeInt 32 1 |
| 110 | %_ptr_Function_int = OpTypePointer Function %int |
| 111 | %int_0 = OpConstant %int 0 |
| 112 | %bool = OpTypeBool |
| 113 | %_ptr_Function_bool = OpTypePointer Function %bool |
| 114 | %float = OpTypeFloat 32 |
| 115 | %v4float = OpTypeVector %float 4 |
| 116 | %_ptr_UniformConstant_v4float = OpTypePointer UniformConstant %v4float |
| 117 | %c = OpVariable %_ptr_UniformConstant_v4float UniformConstant |
| 118 | %uint = OpTypeInt 32 0 |
| 119 | %uint_0 = OpConstant %uint 0 |
| 120 | %_ptr_UniformConstant_float = OpTypePointer UniformConstant %float |
| 121 | %float_0 = OpConstant %float 0 |
| 122 | %int_10 = OpConstant %int 10 |
| 123 | %int_1 = OpConstant %int 1 |
| 124 | %main = OpFunction %void None %3 |
| 125 | %5 = OpLabel |
| 126 | %21 = OpAccessChain %_ptr_UniformConstant_float %c %uint_0 |
| 127 | %22 = OpLoad %float %21 |
| 128 | %24 = OpFOrdEqual %bool %22 %float_0 |
| 129 | OpBranch %25 |
| 130 | %25 = OpLabel |
| 131 | %46 = OpPhi %int %int_0 %5 %43 %28 |
| 132 | %47 = OpPhi %int %int_0 %5 %45 %28 |
| 133 | OpLoopMerge %27 %28 None |
| 134 | OpBranch %29 |
| 135 | %29 = OpLabel |
| 136 | %32 = OpSLessThan %bool %46 %int_10 |
| 137 | OpBranchConditional %32 %26 %27 |
| 138 | %26 = OpLabel |
| 139 | OpSelectionMerge %35 None |
| 140 | OpBranchConditional %24 %34 %39 |
| 141 | %34 = OpLabel |
| 142 | %38 = OpIAdd %int %46 %int_1 |
| 143 | OpBranch %35 |
| 144 | %39 = OpLabel |
| 145 | %41 = OpIAdd %int %47 %int_1 |
| 146 | OpBranch %35 |
| 147 | %35 = OpLabel |
| 148 | %48 = OpPhi %int %38 %34 %46 %39 |
| 149 | %49 = OpPhi %int %47 %34 %41 %39 |
| 150 | OpBranch %28 |
| 151 | %28 = OpLabel |
| 152 | %43 = OpIAdd %int %48 %int_1 |
| 153 | %45 = OpIAdd %int %49 %int_1 |
| 154 | OpBranch %25 |
| 155 | %27 = OpLabel |
| 156 | OpReturn |
| 157 | OpFunctionEnd |
| 158 | )"; |
| 159 | |
| 160 | SinglePassRunAndMatch<LoopUnswitchPass>(text, true); |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | Generated from the following GLSL + --eliminate-local-multi-store |
| 165 | |
| 166 | #version 330 core |
| 167 | in vec4 c; |
| 168 | void main() { |
| 169 | int i = 0; |
| 170 | bool cond = c[0] == 0; |
| 171 | for (; i < 10; i++) { |
| 172 | if (cond) { |
| 173 | i++; |
| 174 | } |
| 175 | else { |
| 176 | return; |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | */ |
| 181 | TEST_F(UnswitchTest, UnswitchExit) { |
| 182 | const std::string text = R"( |
| 183 | ; CHECK: [[cst_cond:%\w+]] = OpFOrdEqual |
| 184 | ; CHECK-NEXT: OpSelectionMerge [[if_merge:%\w+]] None |
| 185 | ; CHECK-NEXT: OpBranchConditional [[cst_cond]] [[loop_t:%\w+]] [[loop_f:%\w+]] |
| 186 | |
| 187 | ; Loop specialized for false. |
| 188 | ; CHECK: [[loop_f]] = OpLabel |
| 189 | ; CHECK: OpReturn |
| 190 | |
| 191 | ; Loop specialized for true. |
| 192 | ; CHECK: [[loop_t]] = OpLabel |
| 193 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 194 | ; CHECK: [[loop]] = OpLabel |
| 195 | ; CHECK-NEXT: [[phi_i:%\w+]] = OpPhi %int %int_0 [[loop_t]] [[iv_i:%\w+]] [[continue:%\w+]] |
| 196 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 197 | ; CHECK: [[loop_exit:%\w+]] = OpSLessThan {{%\w+}} [[phi_i]] {{%\w+}} |
| 198 | ; CHECK-NEXT: OpBranchConditional [[loop_exit]] {{%\w+}} [[merge]] |
| 199 | ; Check that we have i+=2. |
| 200 | ; CHECK: [[phi_i:%\w+]] = OpIAdd %int [[phi_i]] %int_1 |
| 201 | ; CHECK: [[iv_i]] = OpIAdd %int [[phi_i]] %int_1 |
| 202 | ; CHECK: [[merge]] = OpLabel |
| 203 | ; CHECK-NEXT: OpBranch [[if_merge]] |
| 204 | |
| 205 | ; CHECK: [[if_merge]] = OpLabel |
| 206 | ; CHECK-NEXT: OpReturn |
| 207 | |
| 208 | OpCapability Shader |
| 209 | %1 = OpExtInstImport "GLSL.std.450" |
| 210 | OpMemoryModel Logical GLSL450 |
| 211 | OpEntryPoint Fragment %main "main" %c |
| 212 | OpExecutionMode %main OriginUpperLeft |
| 213 | OpSource GLSL 330 |
| 214 | OpName %main "main" |
| 215 | OpName %c "c" |
| 216 | OpDecorate %c Location 0 |
| 217 | OpDecorate %23 Uniform |
| 218 | %void = OpTypeVoid |
| 219 | %3 = OpTypeFunction %void |
| 220 | %int = OpTypeInt 32 1 |
| 221 | %_ptr_Function_int = OpTypePointer Function %int |
| 222 | %int_0 = OpConstant %int 0 |
| 223 | %bool = OpTypeBool |
| 224 | %_ptr_Function_bool = OpTypePointer Function %bool |
| 225 | %float = OpTypeFloat 32 |
| 226 | %v4float = OpTypeVector %float 4 |
| 227 | %_ptr_Input_v4float = OpTypePointer Input %v4float |
| 228 | %c = OpVariable %_ptr_Input_v4float Input |
| 229 | %uint = OpTypeInt 32 0 |
| 230 | %uint_0 = OpConstant %uint 0 |
| 231 | %_ptr_Input_float = OpTypePointer Input %float |
| 232 | %float_0 = OpConstant %float 0 |
| 233 | %int_10 = OpConstant %int 10 |
| 234 | %int_1 = OpConstant %int 1 |
| 235 | %main = OpFunction %void None %3 |
| 236 | %5 = OpLabel |
| 237 | %20 = OpAccessChain %_ptr_Input_float %c %uint_0 |
| 238 | %21 = OpLoad %float %20 |
| 239 | %23 = OpFOrdEqual %bool %21 %float_0 |
| 240 | OpBranch %24 |
| 241 | %24 = OpLabel |
| 242 | %42 = OpPhi %int %int_0 %5 %41 %27 |
| 243 | OpLoopMerge %26 %27 None |
| 244 | OpBranch %28 |
| 245 | %28 = OpLabel |
| 246 | %31 = OpSLessThan %bool %42 %int_10 |
| 247 | OpBranchConditional %31 %25 %26 |
| 248 | %25 = OpLabel |
| 249 | OpSelectionMerge %34 None |
| 250 | OpBranchConditional %23 %33 %38 |
| 251 | %33 = OpLabel |
| 252 | %37 = OpIAdd %int %42 %int_1 |
| 253 | OpBranch %34 |
| 254 | %38 = OpLabel |
| 255 | OpReturn |
| 256 | %34 = OpLabel |
| 257 | OpBranch %27 |
| 258 | %27 = OpLabel |
| 259 | %41 = OpIAdd %int %37 %int_1 |
| 260 | OpBranch %24 |
| 261 | %26 = OpLabel |
| 262 | OpReturn |
| 263 | OpFunctionEnd |
| 264 | )"; |
| 265 | |
| 266 | SinglePassRunAndMatch<LoopUnswitchPass>(text, true); |
| 267 | } |
| 268 | |
| 269 | /* |
| 270 | Generated from the following GLSL + --eliminate-local-multi-store |
| 271 | |
| 272 | #version 330 core |
| 273 | in vec4 c; |
| 274 | void main() { |
| 275 | int i = 0; |
| 276 | bool cond = c[0] == 0; |
| 277 | for (; i < 10; i++) { |
| 278 | if (cond) { |
| 279 | continue; |
| 280 | } |
| 281 | else { |
| 282 | i++; |
| 283 | } |
| 284 | } |
| 285 | } |
| 286 | */ |
| 287 | TEST_F(UnswitchTest, UnswitchContinue) { |
| 288 | const std::string text = R"( |
| 289 | ; CHECK: [[cst_cond:%\w+]] = OpFOrdEqual |
| 290 | ; CHECK-NEXT: OpSelectionMerge [[if_merge:%\w+]] None |
| 291 | ; CHECK-NEXT: OpBranchConditional [[cst_cond]] [[loop_t:%\w+]] [[loop_f:%\w+]] |
| 292 | |
| 293 | ; Loop specialized for false. |
| 294 | ; CHECK: [[loop_f]] = OpLabel |
| 295 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 296 | ; CHECK: [[loop]] = OpLabel |
| 297 | ; CHECK-NEXT: [[phi_i:%\w+]] = OpPhi %int %int_0 [[loop_f]] [[iv_i:%\w+]] [[continue:%\w+]] |
| 298 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 299 | ; CHECK: [[loop_exit:%\w+]] = OpSLessThan {{%\w+}} [[phi_i]] {{%\w+}} |
| 300 | ; CHECK-NEXT: OpBranchConditional [[loop_exit]] [[loop_body:%\w+]] [[merge]] |
| 301 | ; CHECK: [[loop_body:%\w+]] = OpLabel |
| 302 | ; CHECK-NEXT: OpSelectionMerge |
| 303 | ; CHECK-NEXT: OpBranchConditional %false |
| 304 | ; CHECK: [[merge]] = OpLabel |
| 305 | ; CHECK-NEXT: OpBranch [[if_merge]] |
| 306 | |
| 307 | ; Loop specialized for true. |
| 308 | ; CHECK: [[loop_t]] = OpLabel |
| 309 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 310 | ; CHECK: [[loop]] = OpLabel |
| 311 | ; CHECK-NEXT: [[phi_i:%\w+]] = OpPhi %int %int_0 [[loop_t]] [[iv_i:%\w+]] [[continue:%\w+]] |
| 312 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 313 | ; CHECK: [[loop_exit:%\w+]] = OpSLessThan {{%\w+}} [[phi_i]] {{%\w+}} |
| 314 | ; CHECK-NEXT: OpBranchConditional [[loop_exit]] [[loop_body:%\w+]] [[merge]] |
| 315 | ; CHECK: [[loop_body:%\w+]] = OpLabel |
| 316 | ; CHECK-NEXT: OpSelectionMerge |
| 317 | ; CHECK-NEXT: OpBranchConditional %true |
| 318 | ; CHECK: [[merge]] = OpLabel |
| 319 | ; CHECK-NEXT: OpBranch [[if_merge]] |
| 320 | |
| 321 | ; CHECK: [[if_merge]] = OpLabel |
| 322 | ; CHECK-NEXT: OpReturn |
| 323 | |
| 324 | OpCapability Shader |
| 325 | %1 = OpExtInstImport "GLSL.std.450" |
| 326 | OpMemoryModel Logical GLSL450 |
| 327 | OpEntryPoint Fragment %main "main" %c |
| 328 | OpExecutionMode %main OriginUpperLeft |
| 329 | OpSource GLSL 330 |
| 330 | OpName %main "main" |
| 331 | OpName %c "c" |
| 332 | OpDecorate %c Location 0 |
| 333 | OpDecorate %23 Uniform |
| 334 | %void = OpTypeVoid |
| 335 | %3 = OpTypeFunction %void |
| 336 | %int = OpTypeInt 32 1 |
| 337 | %_ptr_Function_int = OpTypePointer Function %int |
| 338 | %int_0 = OpConstant %int 0 |
| 339 | %bool = OpTypeBool |
| 340 | %_ptr_Function_bool = OpTypePointer Function %bool |
| 341 | %float = OpTypeFloat 32 |
| 342 | %v4float = OpTypeVector %float 4 |
| 343 | %_ptr_Input_v4float = OpTypePointer Input %v4float |
| 344 | %c = OpVariable %_ptr_Input_v4float Input |
| 345 | %uint = OpTypeInt 32 0 |
| 346 | %uint_0 = OpConstant %uint 0 |
| 347 | %_ptr_Input_float = OpTypePointer Input %float |
| 348 | %float_0 = OpConstant %float 0 |
| 349 | %int_10 = OpConstant %int 10 |
| 350 | %int_1 = OpConstant %int 1 |
| 351 | %main = OpFunction %void None %3 |
| 352 | %5 = OpLabel |
| 353 | %20 = OpAccessChain %_ptr_Input_float %c %uint_0 |
| 354 | %21 = OpLoad %float %20 |
| 355 | %23 = OpFOrdEqual %bool %21 %float_0 |
| 356 | OpBranch %24 |
| 357 | %24 = OpLabel |
| 358 | %42 = OpPhi %int %int_0 %5 %41 %27 |
| 359 | OpLoopMerge %26 %27 None |
| 360 | OpBranch %28 |
| 361 | %28 = OpLabel |
| 362 | %31 = OpSLessThan %bool %42 %int_10 |
| 363 | OpBranchConditional %31 %25 %26 |
| 364 | %25 = OpLabel |
| 365 | OpSelectionMerge %34 None |
| 366 | OpBranchConditional %23 %33 %36 |
| 367 | %33 = OpLabel |
| 368 | OpBranch %27 |
| 369 | %36 = OpLabel |
| 370 | %39 = OpIAdd %int %42 %int_1 |
| 371 | OpBranch %34 |
| 372 | %34 = OpLabel |
| 373 | OpBranch %27 |
| 374 | %27 = OpLabel |
| 375 | %43 = OpPhi %int %42 %33 %39 %34 |
| 376 | %41 = OpIAdd %int %43 %int_1 |
| 377 | OpBranch %24 |
| 378 | %26 = OpLabel |
| 379 | OpReturn |
| 380 | OpFunctionEnd |
| 381 | )"; |
| 382 | |
| 383 | SinglePassRunAndMatch<LoopUnswitchPass>(text, true); |
| 384 | } |
| 385 | |
| 386 | /* |
| 387 | Generated from the following GLSL + --eliminate-local-multi-store |
| 388 | |
| 389 | #version 330 core |
| 390 | in vec4 c; |
| 391 | void main() { |
| 392 | int i = 0; |
| 393 | bool cond = c[0] == 0; |
| 394 | for (; i < 10; i++) { |
| 395 | if (cond) { |
| 396 | i++; |
| 397 | } |
| 398 | else { |
| 399 | break; |
| 400 | } |
| 401 | } |
| 402 | } |
| 403 | */ |
| 404 | TEST_F(UnswitchTest, UnswitchKillLoop) { |
| 405 | const std::string text = R"( |
| 406 | ; CHECK: [[cst_cond:%\w+]] = OpFOrdEqual |
| 407 | ; CHECK-NEXT: OpSelectionMerge [[if_merge:%\w+]] None |
| 408 | ; CHECK-NEXT: OpBranchConditional [[cst_cond]] [[loop_t:%\w+]] [[loop_f:%\w+]] |
| 409 | |
| 410 | ; Loop specialized for false. |
| 411 | ; CHECK: [[loop_f]] = OpLabel |
| 412 | ; CHECK: OpBranch [[if_merge]] |
| 413 | |
| 414 | ; Loop specialized for true. |
| 415 | ; CHECK: [[loop_t]] = OpLabel |
| 416 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 417 | ; CHECK: [[loop]] = OpLabel |
| 418 | ; CHECK-NEXT: [[phi_i:%\w+]] = OpPhi %int %int_0 [[loop_t]] [[iv_i:%\w+]] [[continue:%\w+]] |
| 419 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 420 | ; CHECK: [[loop_exit:%\w+]] = OpSLessThan {{%\w+}} [[phi_i]] {{%\w+}} |
| 421 | ; CHECK-NEXT: OpBranchConditional [[loop_exit]] {{%\w+}} [[merge]] |
| 422 | ; Check that we have i+=2. |
| 423 | ; CHECK: [[phi_i:%\w+]] = OpIAdd %int [[phi_i]] %int_1 |
| 424 | ; CHECK: [[iv_i]] = OpIAdd %int [[phi_i]] %int_1 |
| 425 | ; CHECK: [[merge]] = OpLabel |
| 426 | ; CHECK-NEXT: OpBranch [[if_merge]] |
| 427 | |
| 428 | ; CHECK: [[if_merge]] = OpLabel |
| 429 | ; CHECK-NEXT: OpReturn |
| 430 | |
| 431 | OpCapability Shader |
| 432 | %1 = OpExtInstImport "GLSL.std.450" |
| 433 | OpMemoryModel Logical GLSL450 |
| 434 | OpEntryPoint Fragment %main "main" %c |
| 435 | OpExecutionMode %main OriginUpperLeft |
| 436 | OpSource GLSL 330 |
| 437 | OpName %main "main" |
| 438 | OpName %c "c" |
| 439 | OpDecorate %c Location 0 |
| 440 | OpDecorate %23 Uniform |
| 441 | %void = OpTypeVoid |
| 442 | %3 = OpTypeFunction %void |
| 443 | %int = OpTypeInt 32 1 |
| 444 | %_ptr_Function_int = OpTypePointer Function %int |
| 445 | %int_0 = OpConstant %int 0 |
| 446 | %bool = OpTypeBool |
| 447 | %_ptr_Function_bool = OpTypePointer Function %bool |
| 448 | %float = OpTypeFloat 32 |
| 449 | %v4float = OpTypeVector %float 4 |
| 450 | %_ptr_Input_v4float = OpTypePointer Input %v4float |
| 451 | %c = OpVariable %_ptr_Input_v4float Input |
| 452 | %uint = OpTypeInt 32 0 |
| 453 | %uint_0 = OpConstant %uint 0 |
| 454 | %_ptr_Input_float = OpTypePointer Input %float |
| 455 | %float_0 = OpConstant %float 0 |
| 456 | %int_10 = OpConstant %int 10 |
| 457 | %int_1 = OpConstant %int 1 |
| 458 | %main = OpFunction %void None %3 |
| 459 | %5 = OpLabel |
| 460 | %20 = OpAccessChain %_ptr_Input_float %c %uint_0 |
| 461 | %21 = OpLoad %float %20 |
| 462 | %23 = OpFOrdEqual %bool %21 %float_0 |
| 463 | OpBranch %24 |
| 464 | %24 = OpLabel |
| 465 | %42 = OpPhi %int %int_0 %5 %41 %27 |
| 466 | OpLoopMerge %26 %27 None |
| 467 | OpBranch %28 |
| 468 | %28 = OpLabel |
| 469 | %31 = OpSLessThan %bool %42 %int_10 |
| 470 | OpBranchConditional %31 %25 %26 |
| 471 | %25 = OpLabel |
| 472 | OpSelectionMerge %34 None |
| 473 | OpBranchConditional %23 %33 %38 |
| 474 | %33 = OpLabel |
| 475 | %37 = OpIAdd %int %42 %int_1 |
| 476 | OpBranch %34 |
| 477 | %38 = OpLabel |
| 478 | OpBranch %26 |
| 479 | %34 = OpLabel |
| 480 | OpBranch %27 |
| 481 | %27 = OpLabel |
| 482 | %41 = OpIAdd %int %37 %int_1 |
| 483 | OpBranch %24 |
| 484 | %26 = OpLabel |
| 485 | OpReturn |
| 486 | OpFunctionEnd |
| 487 | )"; |
| 488 | |
| 489 | SinglePassRunAndMatch<LoopUnswitchPass>(text, true); |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | Generated from the following GLSL + --eliminate-local-multi-store |
| 494 | |
| 495 | #version 330 core |
| 496 | in vec4 c; |
| 497 | void main() { |
| 498 | int i = 0; |
| 499 | int cond = int(c[0]); |
| 500 | for (; i < 10; i++) { |
| 501 | switch (cond) { |
| 502 | case 0: |
| 503 | return; |
| 504 | case 1: |
| 505 | discard; |
| 506 | case 2: |
| 507 | break; |
| 508 | default: |
| 509 | break; |
| 510 | } |
| 511 | } |
| 512 | bool cond2 = i == 9; |
| 513 | } |
| 514 | */ |
| 515 | TEST_F(UnswitchTest, UnswitchSwitch) { |
| 516 | const std::string text = R"( |
| 517 | ; CHECK: [[cst_cond:%\w+]] = OpConvertFToS |
| 518 | ; CHECK-NEXT: OpSelectionMerge [[if_merge:%\w+]] None |
| 519 | ; CHECK-NEXT: OpSwitch [[cst_cond]] [[default:%\w+]] 0 [[loop_0:%\w+]] 1 [[loop_1:%\w+]] 2 [[loop_2:%\w+]] |
| 520 | |
| 521 | ; Loop specialized for 2. |
| 522 | ; CHECK: [[loop_2]] = OpLabel |
| 523 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 524 | ; CHECK: [[loop]] = OpLabel |
| 525 | ; CHECK-NEXT: [[phi_i:%\w+]] = OpPhi %int %int_0 [[loop_2]] [[iv_i:%\w+]] [[continue:%\w+]] |
| 526 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 527 | ; CHECK: [[loop_exit:%\w+]] = OpSLessThan {{%\w+}} [[phi_i]] {{%\w+}} |
| 528 | ; CHECK-NEXT: OpBranchConditional [[loop_exit]] [[loop_body:%\w+]] [[merge]] |
| 529 | ; CHECK: [[loop_body]] = OpLabel |
| 530 | ; CHECK-NEXT: OpSelectionMerge |
| 531 | ; CHECK-NEXT: OpSwitch %int_2 |
| 532 | ; CHECK: [[merge]] = OpLabel |
| 533 | ; CHECK-NEXT: OpBranch [[if_merge]] |
| 534 | |
| 535 | ; Loop specialized for 1. |
| 536 | ; CHECK: [[loop_1]] = OpLabel |
| 537 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 538 | ; CHECK: [[loop]] = OpLabel |
| 539 | ; CHECK-NEXT: [[phi_i:%\w+]] = OpPhi %int %int_0 [[loop_1]] [[iv_i:%\w+]] [[continue:%\w+]] |
| 540 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 541 | ; CHECK: [[loop_exit:%\w+]] = OpSLessThan {{%\w+}} [[phi_i]] {{%\w+}} |
| 542 | ; CHECK-NEXT: OpBranchConditional [[loop_exit]] [[loop_body:%\w+]] [[merge]] |
| 543 | ; CHECK: [[loop_body]] = OpLabel |
| 544 | ; CHECK-NEXT: OpSelectionMerge |
| 545 | ; CHECK-NEXT: OpSwitch %int_1 |
| 546 | ; CHECK: [[merge]] = OpLabel |
| 547 | ; CHECK-NEXT: OpBranch [[if_merge]] |
| 548 | |
| 549 | ; Loop specialized for 0. |
| 550 | ; CHECK: [[loop_0]] = OpLabel |
| 551 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 552 | ; CHECK: [[loop]] = OpLabel |
| 553 | ; CHECK-NEXT: [[phi_i:%\w+]] = OpPhi %int %int_0 [[loop_0]] [[iv_i:%\w+]] [[continue:%\w+]] |
| 554 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 555 | ; CHECK: [[loop_exit:%\w+]] = OpSLessThan {{%\w+}} [[phi_i]] {{%\w+}} |
| 556 | ; CHECK-NEXT: OpBranchConditional [[loop_exit]] [[loop_body:%\w+]] [[merge]] |
| 557 | ; CHECK: [[loop_body]] = OpLabel |
| 558 | ; CHECK-NEXT: OpSelectionMerge |
| 559 | ; CHECK-NEXT: OpSwitch %int_0 |
| 560 | ; CHECK: [[merge]] = OpLabel |
| 561 | ; CHECK-NEXT: OpBranch [[if_merge]] |
| 562 | |
| 563 | ; Loop specialized for the default case. |
| 564 | ; CHECK: [[default]] = OpLabel |
| 565 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 566 | ; CHECK: [[loop]] = OpLabel |
| 567 | ; CHECK-NEXT: [[phi_i:%\w+]] = OpPhi %int %int_0 [[default]] [[iv_i:%\w+]] [[continue:%\w+]] |
| 568 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 569 | ; CHECK: [[loop_exit:%\w+]] = OpSLessThan {{%\w+}} [[phi_i]] {{%\w+}} |
| 570 | ; CHECK-NEXT: OpBranchConditional [[loop_exit]] [[loop_body:%\w+]] [[merge]] |
| 571 | ; CHECK: [[loop_body]] = OpLabel |
| 572 | ; CHECK-NEXT: OpSelectionMerge |
| 573 | ; CHECK-NEXT: OpSwitch %uint_3 |
| 574 | ; CHECK: [[merge]] = OpLabel |
| 575 | ; CHECK-NEXT: OpBranch [[if_merge]] |
| 576 | |
| 577 | ; CHECK: [[if_merge]] = OpLabel |
| 578 | ; CHECK-NEXT: OpReturn |
| 579 | OpCapability Shader |
| 580 | %1 = OpExtInstImport "GLSL.std.450" |
| 581 | OpMemoryModel Logical GLSL450 |
| 582 | OpEntryPoint Fragment %main "main" %c |
| 583 | OpExecutionMode %main OriginUpperLeft |
| 584 | OpSource GLSL 330 |
| 585 | OpName %main "main" |
| 586 | OpName %c "c" |
| 587 | OpDecorate %c Location 0 |
| 588 | OpDecorate %20 Uniform |
| 589 | %void = OpTypeVoid |
| 590 | %3 = OpTypeFunction %void |
| 591 | %int = OpTypeInt 32 1 |
| 592 | %_ptr_Function_int = OpTypePointer Function %int |
| 593 | %int_0 = OpConstant %int 0 |
| 594 | %float = OpTypeFloat 32 |
| 595 | %v4float = OpTypeVector %float 4 |
| 596 | %_ptr_Input_v4float = OpTypePointer Input %v4float |
| 597 | %c = OpVariable %_ptr_Input_v4float Input |
| 598 | %uint = OpTypeInt 32 0 |
| 599 | %uint_0 = OpConstant %uint 0 |
| 600 | %_ptr_Input_float = OpTypePointer Input %float |
| 601 | %int_10 = OpConstant %int 10 |
| 602 | %bool = OpTypeBool |
| 603 | %int_1 = OpConstant %int 1 |
| 604 | %_ptr_Function_bool = OpTypePointer Function %bool |
| 605 | %main = OpFunction %void None %3 |
| 606 | %5 = OpLabel |
| 607 | %18 = OpAccessChain %_ptr_Input_float %c %uint_0 |
| 608 | %19 = OpLoad %float %18 |
| 609 | %20 = OpConvertFToS %int %19 |
| 610 | OpBranch %21 |
| 611 | %21 = OpLabel |
| 612 | %49 = OpPhi %int %int_0 %5 %43 %24 |
| 613 | OpLoopMerge %23 %24 None |
| 614 | OpBranch %25 |
| 615 | %25 = OpLabel |
| 616 | %29 = OpSLessThan %bool %49 %int_10 |
| 617 | OpBranchConditional %29 %22 %23 |
| 618 | %22 = OpLabel |
| 619 | OpSelectionMerge %35 None |
| 620 | OpSwitch %20 %34 0 %31 1 %32 2 %33 |
| 621 | %34 = OpLabel |
| 622 | OpBranch %35 |
| 623 | %31 = OpLabel |
| 624 | OpReturn |
| 625 | %32 = OpLabel |
| 626 | OpKill |
| 627 | %33 = OpLabel |
| 628 | OpBranch %35 |
| 629 | %35 = OpLabel |
| 630 | OpBranch %24 |
| 631 | %24 = OpLabel |
| 632 | %43 = OpIAdd %int %49 %int_1 |
| 633 | OpBranch %21 |
| 634 | %23 = OpLabel |
| 635 | OpReturn |
| 636 | OpFunctionEnd |
| 637 | )"; |
| 638 | |
| 639 | SinglePassRunAndMatch<LoopUnswitchPass>(text, true); |
| 640 | } |
| 641 | |
| 642 | /* |
| 643 | Generated from the following GLSL + --eliminate-local-multi-store |
| 644 | |
| 645 | #version 440 core |
| 646 | layout(location = 0)in vec4 c; |
| 647 | void main() { |
| 648 | int i = 0; |
| 649 | int j = 0; |
| 650 | int k = 0; |
| 651 | bool cond = c[0] == 0; |
| 652 | for (; i < 10; i++) { |
| 653 | for (; j < 10; j++) { |
| 654 | if (cond) { |
| 655 | i++; |
| 656 | } else { |
| 657 | j++; |
| 658 | } |
| 659 | } |
| 660 | } |
| 661 | } |
| 662 | */ |
| 663 | TEST_F(UnswitchTest, UnSwitchNested) { |
| 664 | // Test that an branch can be unswitched out of two nested loops. |
| 665 | const std::string text = R"( |
| 666 | ; CHECK: [[cst_cond:%\w+]] = OpFOrdEqual |
| 667 | ; CHECK-NEXT: OpSelectionMerge [[if_merge:%\w+]] None |
| 668 | ; CHECK-NEXT: OpBranchConditional [[cst_cond]] [[loop_t:%\w+]] [[loop_f:%\w+]] |
| 669 | |
| 670 | ; Loop specialized for false |
| 671 | ; CHECK: [[loop_f]] = OpLabel |
| 672 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 673 | ; CHECK: [[loop]] = OpLabel |
| 674 | ; CHECK-NEXT: {{%\w+}} = OpPhi %int %int_0 [[loop_f]] {{%\w+}} [[continue:%\w+]] |
| 675 | ; CHECK-NEXT: {{%\w+}} = OpPhi %int %int_0 [[loop_f]] {{%\w+}} [[continue]] |
| 676 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 677 | ; CHECK-NOT: [[merge]] = OpLabel |
| 678 | ; CHECK: OpLoopMerge |
| 679 | ; CHECK-NEXT: OpBranch [[bb1:%\w+]] |
| 680 | ; CHECK: [[bb1]] = OpLabel |
| 681 | ; CHECK-NEXT: OpSLessThan |
| 682 | ; CHECK-NEXT: OpBranchConditional {{%\w+}} [[bb2:%\w+]] |
| 683 | ; CHECK: [[bb2]] = OpLabel |
| 684 | ; CHECK-NEXT: OpSelectionMerge |
| 685 | ; CHECK-NEXT: OpBranchConditional %false |
| 686 | ; CHECK: [[merge]] = OpLabel |
| 687 | |
| 688 | ; Loop specialized for true. Same as first loop except the branch condition is true. |
| 689 | ; CHECK: [[loop_t]] = OpLabel |
| 690 | ; CHECK-NEXT: OpBranch [[loop:%\w+]] |
| 691 | ; CHECK: [[loop]] = OpLabel |
| 692 | ; CHECK-NEXT: {{%\w+}} = OpPhi %int %int_0 [[loop_t]] {{%\w+}} [[continue:%\w+]] |
| 693 | ; CHECK-NEXT: {{%\w+}} = OpPhi %int %int_0 [[loop_t]] {{%\w+}} [[continue]] |
| 694 | ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None |
| 695 | ; CHECK-NOT: [[merge]] = OpLabel |
| 696 | ; CHECK: OpLoopMerge |
| 697 | ; CHECK-NEXT: OpBranch [[bb1:%\w+]] |
| 698 | ; CHECK: [[bb1]] = OpLabel |
| 699 | ; CHECK-NEXT: OpSLessThan |
| 700 | ; CHECK-NEXT: OpBranchConditional {{%\w+}} [[bb2:%\w+]] |
| 701 | ; CHECK: [[bb2]] = OpLabel |
| 702 | ; CHECK-NEXT: OpSelectionMerge |
| 703 | ; CHECK-NEXT: OpBranchConditional %true |
| 704 | ; CHECK: [[merge]] = OpLabel |
| 705 | |
| 706 | OpCapability Shader |
| 707 | %1 = OpExtInstImport "GLSL.std.450" |
| 708 | OpMemoryModel Logical GLSL450 |
| 709 | OpEntryPoint Fragment %main "main" %c |
| 710 | OpExecutionMode %main OriginUpperLeft |
| 711 | OpSource GLSL 440 |
| 712 | OpName %main "main" |
| 713 | OpName %c "c" |
| 714 | OpDecorate %c Location 0 |
| 715 | OpDecorate %25 Uniform |
| 716 | %void = OpTypeVoid |
| 717 | %3 = OpTypeFunction %void |
| 718 | %int = OpTypeInt 32 1 |
| 719 | %_ptr_Function_int = OpTypePointer Function %int |
| 720 | %int_0 = OpConstant %int 0 |
| 721 | %bool = OpTypeBool |
| 722 | %_ptr_Function_bool = OpTypePointer Function %bool |
| 723 | %float = OpTypeFloat 32 |
| 724 | %v4float = OpTypeVector %float 4 |
| 725 | %_ptr_Input_v4float = OpTypePointer Input %v4float |
| 726 | %c = OpVariable %_ptr_Input_v4float Input |
| 727 | %uint = OpTypeInt 32 0 |
| 728 | %uint_0 = OpConstant %uint 0 |
| 729 | %_ptr_Input_float = OpTypePointer Input %float |
| 730 | %float_0 = OpConstant %float 0 |
| 731 | %int_10 = OpConstant %int 10 |
| 732 | %int_1 = OpConstant %int 1 |
| 733 | %main = OpFunction %void None %3 |
| 734 | %5 = OpLabel |
| 735 | %22 = OpAccessChain %_ptr_Input_float %c %uint_0 |
| 736 | %23 = OpLoad %float %22 |
| 737 | %25 = OpFOrdEqual %bool %23 %float_0 |
| 738 | OpBranch %26 |
| 739 | %26 = OpLabel |
| 740 | %67 = OpPhi %int %int_0 %5 %52 %29 |
| 741 | %68 = OpPhi %int %int_0 %5 %70 %29 |
| 742 | OpLoopMerge %28 %29 None |
| 743 | OpBranch %30 |
| 744 | %30 = OpLabel |
| 745 | %33 = OpSLessThan %bool %67 %int_10 |
| 746 | OpBranchConditional %33 %27 %28 |
| 747 | %27 = OpLabel |
| 748 | OpBranch %34 |
| 749 | %34 = OpLabel |
| 750 | %69 = OpPhi %int %67 %27 %46 %37 |
| 751 | %70 = OpPhi %int %68 %27 %50 %37 |
| 752 | OpLoopMerge %36 %37 None |
| 753 | OpBranch %38 |
| 754 | %38 = OpLabel |
| 755 | %40 = OpSLessThan %bool %70 %int_10 |
| 756 | OpBranchConditional %40 %35 %36 |
| 757 | %35 = OpLabel |
| 758 | OpSelectionMerge %43 None |
| 759 | OpBranchConditional %25 %42 %47 |
| 760 | %42 = OpLabel |
| 761 | %46 = OpIAdd %int %69 %int_1 |
| 762 | OpBranch %43 |
| 763 | %47 = OpLabel |
| 764 | OpReturn |
| 765 | %43 = OpLabel |
| 766 | OpBranch %37 |
| 767 | %37 = OpLabel |
| 768 | %50 = OpIAdd %int %70 %int_1 |
| 769 | OpBranch %34 |
| 770 | %36 = OpLabel |
| 771 | OpBranch %29 |
| 772 | %29 = OpLabel |
| 773 | %52 = OpIAdd %int %69 %int_1 |
| 774 | OpBranch %26 |
| 775 | %28 = OpLabel |
| 776 | OpReturn |
| 777 | OpFunctionEnd |
| 778 | )"; |
| 779 | |
| 780 | SinglePassRunAndMatch<LoopUnswitchPass>(text, true); |
| 781 | } |
| 782 | |
| 783 | /* |
| 784 | Generated from the following GLSL + --eliminate-local-multi-store |
| 785 | |
| 786 | #version 330 core |
| 787 | in vec4 c; |
| 788 | void main() { |
| 789 | bool cond = false; |
| 790 | if (c[0] == 0) { |
| 791 | cond = c[1] == 0; |
| 792 | } else { |
| 793 | cond = c[2] == 0; |
| 794 | } |
| 795 | for (int i = 0; i < 10; i++) { |
| 796 | if (cond) { |
| 797 | i++; |
| 798 | } |
| 799 | } |
| 800 | } |
| 801 | */ |
| 802 | TEST_F(UnswitchTest, UnswitchNotUniform) { |
| 803 | // Check that the unswitch is not triggered (condition loop invariant but not |
| 804 | // uniform) |
| 805 | const std::string text = R"( |
| 806 | OpCapability Shader |
| 807 | %1 = OpExtInstImport "GLSL.std.450" |
| 808 | OpMemoryModel Logical GLSL450 |
| 809 | OpEntryPoint Fragment %main "main" %c |
| 810 | OpExecutionMode %main OriginUpperLeft |
| 811 | OpSource GLSL 330 |
| 812 | OpName %main "main" |
| 813 | OpName %c "c" |
| 814 | OpDecorate %c Location 0 |
| 815 | %void = OpTypeVoid |
| 816 | %3 = OpTypeFunction %void |
| 817 | %bool = OpTypeBool |
| 818 | %_ptr_Function_bool = OpTypePointer Function %bool |
| 819 | %float = OpTypeFloat 32 |
| 820 | %v4float = OpTypeVector %float 4 |
| 821 | %_ptr_Input_v4float = OpTypePointer Input %v4float |
| 822 | %c = OpVariable %_ptr_Input_v4float Input |
| 823 | %uint = OpTypeInt 32 0 |
| 824 | %uint_0 = OpConstant %uint 0 |
| 825 | %_ptr_Input_float = OpTypePointer Input %float |
| 826 | %float_0 = OpConstant %float 0 |
| 827 | %uint_1 = OpConstant %uint 1 |
| 828 | %uint_2 = OpConstant %uint 2 |
| 829 | %int = OpTypeInt 32 1 |
| 830 | %_ptr_Function_int = OpTypePointer Function %int |
| 831 | %int_0 = OpConstant %int 0 |
| 832 | %int_10 = OpConstant %int 10 |
| 833 | %int_1 = OpConstant %int 1 |
| 834 | %main = OpFunction %void None %3 |
| 835 | %5 = OpLabel |
| 836 | %17 = OpAccessChain %_ptr_Input_float %c %uint_0 |
| 837 | %18 = OpLoad %float %17 |
| 838 | %20 = OpFOrdEqual %bool %18 %float_0 |
| 839 | OpSelectionMerge %22 None |
| 840 | OpBranchConditional %20 %21 %27 |
| 841 | %21 = OpLabel |
| 842 | %24 = OpAccessChain %_ptr_Input_float %c %uint_1 |
| 843 | %25 = OpLoad %float %24 |
| 844 | %26 = OpFOrdEqual %bool %25 %float_0 |
| 845 | OpBranch %22 |
| 846 | %27 = OpLabel |
| 847 | %29 = OpAccessChain %_ptr_Input_float %c %uint_2 |
| 848 | %30 = OpLoad %float %29 |
| 849 | %31 = OpFOrdEqual %bool %30 %float_0 |
| 850 | OpBranch %22 |
| 851 | %22 = OpLabel |
| 852 | %52 = OpPhi %bool %26 %21 %31 %27 |
| 853 | OpBranch %36 |
| 854 | %36 = OpLabel |
| 855 | %53 = OpPhi %int %int_0 %22 %51 %39 |
| 856 | OpLoopMerge %38 %39 None |
| 857 | OpBranch %40 |
| 858 | %40 = OpLabel |
| 859 | %43 = OpSLessThan %bool %53 %int_10 |
| 860 | OpBranchConditional %43 %37 %38 |
| 861 | %37 = OpLabel |
| 862 | OpSelectionMerge %46 None |
| 863 | OpBranchConditional %52 %45 %46 |
| 864 | %45 = OpLabel |
| 865 | %49 = OpIAdd %int %53 %int_1 |
| 866 | OpBranch %46 |
| 867 | %46 = OpLabel |
| 868 | %54 = OpPhi %int %53 %37 %49 %45 |
| 869 | OpBranch %39 |
| 870 | %39 = OpLabel |
| 871 | %51 = OpIAdd %int %54 %int_1 |
| 872 | OpBranch %36 |
| 873 | %38 = OpLabel |
| 874 | OpReturn |
| 875 | OpFunctionEnd |
| 876 | )"; |
| 877 | |
| 878 | auto result = |
| 879 | SinglePassRunAndDisassemble<LoopUnswitchPass>(text, true, false); |
| 880 | |
| 881 | EXPECT_EQ(Pass::Status::SuccessWithoutChange, std::get<1>(result)); |
| 882 | } |
| 883 | |
| 884 | TEST_F(UnswitchTest, DontUnswitchLatch) { |
| 885 | // Check that the unswitch is not triggered for the latch branch. |
| 886 | const std::string text = R"( |
| 887 | OpCapability Shader |
| 888 | %1 = OpExtInstImport "GLSL.std.450" |
| 889 | OpMemoryModel Logical GLSL450 |
| 890 | OpEntryPoint Fragment %4 "main" |
| 891 | OpExecutionMode %4 OriginUpperLeft |
| 892 | OpSource ESSL 310 |
| 893 | %void = OpTypeVoid |
| 894 | %3 = OpTypeFunction %void |
| 895 | %bool = OpTypeBool |
| 896 | %false = OpConstantFalse %bool |
| 897 | %4 = OpFunction %void None %3 |
| 898 | %5 = OpLabel |
| 899 | OpBranch %6 |
| 900 | %6 = OpLabel |
| 901 | OpLoopMerge %8 %9 None |
| 902 | OpBranch %7 |
| 903 | %7 = OpLabel |
| 904 | OpBranch %9 |
| 905 | %9 = OpLabel |
| 906 | OpBranchConditional %false %6 %8 |
| 907 | %8 = OpLabel |
| 908 | OpReturn |
| 909 | OpFunctionEnd |
| 910 | )"; |
| 911 | |
| 912 | auto result = |
| 913 | SinglePassRunAndDisassemble<LoopUnswitchPass>(text, true, false); |
| 914 | EXPECT_EQ(Pass::Status::SuccessWithoutChange, std::get<1>(result)); |
| 915 | } |
| 916 | |
| 917 | TEST_F(UnswitchTest, DontUnswitchConstantCondition) { |
| 918 | const std::string text = R"( |
| 919 | OpCapability Shader |
| 920 | %1 = OpExtInstImport "GLSL.std.450" |
| 921 | OpMemoryModel Logical GLSL450 |
| 922 | OpEntryPoint Fragment %main "main" |
| 923 | OpExecutionMode %main OriginLowerLeft |
| 924 | OpSource GLSL 450 |
| 925 | OpName %main "main" |
| 926 | %void = OpTypeVoid |
| 927 | %4 = OpTypeFunction %void |
| 928 | %int = OpTypeInt 32 1 |
| 929 | %int_0 = OpConstant %int 0 |
| 930 | %bool = OpTypeBool |
| 931 | %true = OpConstantTrue %bool |
| 932 | %int_1 = OpConstant %int 1 |
| 933 | %main = OpFunction %void None %4 |
| 934 | %10 = OpLabel |
| 935 | OpBranch %11 |
| 936 | %11 = OpLabel |
| 937 | %12 = OpPhi %int %int_0 %10 %13 %14 |
| 938 | OpLoopMerge %15 %14 None |
| 939 | OpBranch %16 |
| 940 | %16 = OpLabel |
| 941 | %17 = OpSLessThan %bool %12 %int_1 |
| 942 | OpBranchConditional %17 %18 %15 |
| 943 | %18 = OpLabel |
| 944 | OpSelectionMerge %19 None |
| 945 | OpBranchConditional %true %20 %19 |
| 946 | %20 = OpLabel |
| 947 | %21 = OpIAdd %int %12 %int_1 |
| 948 | OpBranch %19 |
| 949 | %19 = OpLabel |
| 950 | %22 = OpPhi %int %21 %20 %12 %18 |
| 951 | OpBranch %14 |
| 952 | %14 = OpLabel |
| 953 | %13 = OpIAdd %int %22 %int_1 |
| 954 | OpBranch %11 |
| 955 | %15 = OpLabel |
| 956 | OpReturn |
| 957 | OpFunctionEnd |
| 958 | )"; |
| 959 | |
| 960 | auto result = |
| 961 | SinglePassRunAndDisassemble<LoopUnswitchPass>(text, true, false); |
| 962 | EXPECT_EQ(Pass::Status::SuccessWithoutChange, std::get<1>(result)); |
| 963 | } |
| 964 | |
| 965 | } // namespace |
| 966 | } // namespace opt |
| 967 | } // namespace spvtools |