| // Copyright (c) 2018 Google LLC. | |
| // | |
| // Licensed under the Apache License, Version 2.0 (the "License"); | |
| // you may not use this file except in compliance with the License. | |
| // You may obtain a copy of the License at | |
| // | |
| // http://www.apache.org/licenses/LICENSE-2.0 | |
| // | |
| // Unless required by applicable law or agreed to in writing, software | |
| // distributed under the License is distributed on an "AS IS" BASIS, | |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| // See the License for the specific language governing permissions and | |
| // limitations under the License. | |
| #include <memory> | |
| #include <vector> | |
| #include "effcee/effcee.h" | |
| #include "gmock/gmock.h" | |
| #include "source/opt/build_module.h" | |
| #include "source/opt/loop_descriptor.h" | |
| #include "source/opt/loop_utils.h" | |
| #include "test/opt//assembly_builder.h" | |
| #include "test/opt/function_utils.h" | |
| namespace spvtools { | |
| namespace opt { | |
| namespace { | |
| bool Validate(const std::vector<uint32_t>& bin) { | |
| spv_target_env target_env = SPV_ENV_UNIVERSAL_1_2; | |
| spv_context spvContext = spvContextCreate(target_env); | |
| spv_diagnostic diagnostic = nullptr; | |
| spv_const_binary_t binary = {bin.data(), bin.size()}; | |
| spv_result_t error = spvValidate(spvContext, &binary, &diagnostic); | |
| if (error != 0) spvDiagnosticPrint(diagnostic); | |
| spvDiagnosticDestroy(diagnostic); | |
| spvContextDestroy(spvContext); | |
| return error == 0; | |
| } | |
| void Match(const std::string& original, IRContext* context, | |
| bool do_validation = true) { | |
| std::vector<uint32_t> bin; | |
| context->module()->ToBinary(&bin, true); | |
| if (do_validation) { | |
| EXPECT_TRUE(Validate(bin)); | |
| } | |
| std::string assembly; | |
| SpirvTools tools(SPV_ENV_UNIVERSAL_1_2); | |
| EXPECT_TRUE( | |
| tools.Disassemble(bin, &assembly, SPV_BINARY_TO_TEXT_OPTION_NO_HEADER)) | |
| << "Disassembling failed for shader:\n" | |
| << assembly << std::endl; | |
| auto match_result = effcee::Match(assembly, original); | |
| EXPECT_EQ(effcee::Result::Status::Ok, match_result.status()) | |
| << match_result.message() << "\nChecking result:\n" | |
| << assembly; | |
| } | |
| using LCSSATest = ::testing::Test; | |
| /* | |
| Generated from the following GLSL + --eliminate-local-multi-store | |
| #version 330 core | |
| layout(location = 0) out vec4 c; | |
| void main() { | |
| int i = 0; | |
| for (; i < 10; i++) { | |
| } | |
| if (i != 0) { | |
| i = 1; | |
| } | |
| } | |
| */ | |
| TEST_F(LCSSATest, SimpleLCSSA) { | |
| const std::string text = R"( | |
| ; CHECK: OpLoopMerge [[merge:%\w+]] %19 None | |
| ; CHECK: [[merge]] = OpLabel | |
| ; CHECK-NEXT: [[phi:%\w+]] = OpPhi {{%\w+}} %30 %20 | |
| ; CHECK-NEXT: %27 = OpINotEqual {{%\w+}} [[phi]] %9 | |
| OpCapability Shader | |
| %1 = OpExtInstImport "GLSL.std.450" | |
| OpMemoryModel Logical GLSL450 | |
| OpEntryPoint Fragment %2 "main" %3 | |
| OpExecutionMode %2 OriginUpperLeft | |
| OpSource GLSL 330 | |
| OpName %2 "main" | |
| OpName %3 "c" | |
| OpDecorate %3 Location 0 | |
| %5 = OpTypeVoid | |
| %6 = OpTypeFunction %5 | |
| %7 = OpTypeInt 32 1 | |
| %8 = OpTypePointer Function %7 | |
| %9 = OpConstant %7 0 | |
| %10 = OpConstant %7 10 | |
| %11 = OpTypeBool | |
| %12 = OpConstant %7 1 | |
| %13 = OpTypeFloat 32 | |
| %14 = OpTypeVector %13 4 | |
| %15 = OpTypePointer Output %14 | |
| %3 = OpVariable %15 Output | |
| %2 = OpFunction %5 None %6 | |
| %16 = OpLabel | |
| OpBranch %17 | |
| %17 = OpLabel | |
| %30 = OpPhi %7 %9 %16 %25 %19 | |
| OpLoopMerge %18 %19 None | |
| OpBranch %20 | |
| %20 = OpLabel | |
| %22 = OpSLessThan %11 %30 %10 | |
| OpBranchConditional %22 %23 %18 | |
| %23 = OpLabel | |
| OpBranch %19 | |
| %19 = OpLabel | |
| %25 = OpIAdd %7 %30 %12 | |
| OpBranch %17 | |
| %18 = OpLabel | |
| %27 = OpINotEqual %11 %30 %9 | |
| OpSelectionMerge %28 None | |
| OpBranchConditional %27 %29 %28 | |
| %29 = OpLabel | |
| OpBranch %28 | |
| %28 = OpLabel | |
| %31 = OpPhi %7 %30 %18 %12 %29 | |
| OpReturn | |
| OpFunctionEnd | |
| )"; | |
| std::unique_ptr<IRContext> context = | |
| BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text, | |
| SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS); | |
| Module* module = context->module(); | |
| EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n" | |
| << text << std::endl; | |
| const Function* f = spvtest::GetFunction(module, 2); | |
| LoopDescriptor ld{context.get(), f}; | |
| Loop* loop = ld[17]; | |
| EXPECT_FALSE(loop->IsLCSSA()); | |
| LoopUtils Util(context.get(), loop); | |
| Util.MakeLoopClosedSSA(); | |
| EXPECT_TRUE(loop->IsLCSSA()); | |
| Match(text, context.get()); | |
| } | |
| /* | |
| Generated from the following GLSL + --eliminate-local-multi-store | |
| #version 330 core | |
| layout(location = 0) out vec4 c; | |
| void main() { | |
| int i = 0; | |
| for (; i < 10; i++) { | |
| } | |
| if (i != 0) { | |
| i = 1; | |
| } | |
| } | |
| */ | |
| // Same test as above, but should reuse an existing phi. | |
| TEST_F(LCSSATest, PhiReuseLCSSA) { | |
| const std::string text = R"( | |
| ; CHECK: OpLoopMerge [[merge:%\w+]] %19 None | |
| ; CHECK: [[merge]] = OpLabel | |
| ; CHECK-NEXT: [[phi:%\w+]] = OpPhi {{%\w+}} %30 %20 | |
| ; CHECK-NEXT: %27 = OpINotEqual {{%\w+}} [[phi]] %9 | |
| OpCapability Shader | |
| %1 = OpExtInstImport "GLSL.std.450" | |
| OpMemoryModel Logical GLSL450 | |
| OpEntryPoint Fragment %2 "main" %3 | |
| OpExecutionMode %2 OriginUpperLeft | |
| OpSource GLSL 330 | |
| OpName %2 "main" | |
| OpName %3 "c" | |
| OpDecorate %3 Location 0 | |
| %5 = OpTypeVoid | |
| %6 = OpTypeFunction %5 | |
| %7 = OpTypeInt 32 1 | |
| %8 = OpTypePointer Function %7 | |
| %9 = OpConstant %7 0 | |
| %10 = OpConstant %7 10 | |
| %11 = OpTypeBool | |
| %12 = OpConstant %7 1 | |
| %13 = OpTypeFloat 32 | |
| %14 = OpTypeVector %13 4 | |
| %15 = OpTypePointer Output %14 | |
| %3 = OpVariable %15 Output | |
| %2 = OpFunction %5 None %6 | |
| %16 = OpLabel | |
| OpBranch %17 | |
| %17 = OpLabel | |
| %30 = OpPhi %7 %9 %16 %25 %19 | |
| OpLoopMerge %18 %19 None | |
| OpBranch %20 | |
| %20 = OpLabel | |
| %22 = OpSLessThan %11 %30 %10 | |
| OpBranchConditional %22 %23 %18 | |
| %23 = OpLabel | |
| OpBranch %19 | |
| %19 = OpLabel | |
| %25 = OpIAdd %7 %30 %12 | |
| OpBranch %17 | |
| %18 = OpLabel | |
| %32 = OpPhi %7 %30 %20 | |
| %27 = OpINotEqual %11 %30 %9 | |
| OpSelectionMerge %28 None | |
| OpBranchConditional %27 %29 %28 | |
| %29 = OpLabel | |
| OpBranch %28 | |
| %28 = OpLabel | |
| %31 = OpPhi %7 %30 %18 %12 %29 | |
| OpReturn | |
| OpFunctionEnd | |
| )"; | |
| std::unique_ptr<IRContext> context = | |
| BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text, | |
| SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS); | |
| Module* module = context->module(); | |
| EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n" | |
| << text << std::endl; | |
| const Function* f = spvtest::GetFunction(module, 2); | |
| LoopDescriptor ld{context.get(), f}; | |
| Loop* loop = ld[17]; | |
| EXPECT_FALSE(loop->IsLCSSA()); | |
| LoopUtils Util(context.get(), loop); | |
| Util.MakeLoopClosedSSA(); | |
| EXPECT_TRUE(loop->IsLCSSA()); | |
| Match(text, context.get()); | |
| } | |
| /* | |
| Generated from the following GLSL + --eliminate-local-multi-store | |
| #version 330 core | |
| layout(location = 0) out vec4 c; | |
| void main() { | |
| int i = 0; | |
| int j = 0; | |
| for (; i < 10; i++) {} | |
| for (; j < 10; j++) {} | |
| if (j != 0) { | |
| i = 1; | |
| } | |
| } | |
| */ | |
| TEST_F(LCSSATest, DualLoopLCSSA) { | |
| const std::string text = R"( | |
| ; CHECK: %20 = OpLabel | |
| ; CHECK-NEXT: [[phi:%\w+]] = OpPhi %6 %17 %21 | |
| ; CHECK: %33 = OpLabel | |
| ; CHECK-NEXT: {{%\w+}} = OpPhi {{%\w+}} [[phi]] %28 %11 %34 | |
| OpCapability Shader | |
| %1 = OpExtInstImport "GLSL.std.450" | |
| OpMemoryModel Logical GLSL450 | |
| OpEntryPoint Fragment %2 "main" %3 | |
| OpExecutionMode %2 OriginUpperLeft | |
| OpSource GLSL 330 | |
| OpName %2 "main" | |
| OpName %3 "c" | |
| OpDecorate %3 Location 0 | |
| %4 = OpTypeVoid | |
| %5 = OpTypeFunction %4 | |
| %6 = OpTypeInt 32 1 | |
| %7 = OpTypePointer Function %6 | |
| %8 = OpConstant %6 0 | |
| %9 = OpConstant %6 10 | |
| %10 = OpTypeBool | |
| %11 = OpConstant %6 1 | |
| %12 = OpTypeFloat 32 | |
| %13 = OpTypeVector %12 4 | |
| %14 = OpTypePointer Output %13 | |
| %3 = OpVariable %14 Output | |
| %2 = OpFunction %4 None %5 | |
| %15 = OpLabel | |
| OpBranch %16 | |
| %16 = OpLabel | |
| %17 = OpPhi %6 %8 %15 %18 %19 | |
| OpLoopMerge %20 %19 None | |
| OpBranch %21 | |
| %21 = OpLabel | |
| %22 = OpSLessThan %10 %17 %9 | |
| OpBranchConditional %22 %23 %20 | |
| %23 = OpLabel | |
| OpBranch %19 | |
| %19 = OpLabel | |
| %18 = OpIAdd %6 %17 %11 | |
| OpBranch %16 | |
| %20 = OpLabel | |
| OpBranch %24 | |
| %24 = OpLabel | |
| %25 = OpPhi %6 %8 %20 %26 %27 | |
| OpLoopMerge %28 %27 None | |
| OpBranch %29 | |
| %29 = OpLabel | |
| %30 = OpSLessThan %10 %25 %9 | |
| OpBranchConditional %30 %31 %28 | |
| %31 = OpLabel | |
| OpBranch %27 | |
| %27 = OpLabel | |
| %26 = OpIAdd %6 %25 %11 | |
| OpBranch %24 | |
| %28 = OpLabel | |
| %32 = OpINotEqual %10 %25 %8 | |
| OpSelectionMerge %33 None | |
| OpBranchConditional %32 %34 %33 | |
| %34 = OpLabel | |
| OpBranch %33 | |
| %33 = OpLabel | |
| %35 = OpPhi %6 %17 %28 %11 %34 | |
| OpReturn | |
| OpFunctionEnd | |
| )"; | |
| std::unique_ptr<IRContext> context = | |
| BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text, | |
| SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS); | |
| Module* module = context->module(); | |
| EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n" | |
| << text << std::endl; | |
| const Function* f = spvtest::GetFunction(module, 2); | |
| LoopDescriptor ld{context.get(), f}; | |
| Loop* loop = ld[16]; | |
| EXPECT_FALSE(loop->IsLCSSA()); | |
| LoopUtils Util(context.get(), loop); | |
| Util.MakeLoopClosedSSA(); | |
| EXPECT_TRUE(loop->IsLCSSA()); | |
| Match(text, context.get()); | |
| } | |
| /* | |
| Generated from the following GLSL + --eliminate-local-multi-store | |
| #version 330 core | |
| layout(location = 0) out vec4 c; | |
| void main() { | |
| int i = 0; | |
| if (i != 0) { | |
| for (; i < 10; i++) {} | |
| } | |
| if (i != 0) { | |
| i = 1; | |
| } | |
| } | |
| */ | |
| TEST_F(LCSSATest, PhiUserLCSSA) { | |
| const std::string text = R"( | |
| ; CHECK: OpLoopMerge [[merge:%\w+]] %22 None | |
| ; CHECK: [[merge]] = OpLabel | |
| ; CHECK-NEXT: [[phi:%\w+]] = OpPhi {{%\w+}} %20 %24 | |
| ; CHECK: %17 = OpLabel | |
| ; CHECK-NEXT: {{%\w+}} = OpPhi {{%\w+}} %8 %15 [[phi]] %23 | |
| OpCapability Shader | |
| %1 = OpExtInstImport "GLSL.std.450" | |
| OpMemoryModel Logical GLSL450 | |
| OpEntryPoint Fragment %2 "main" %3 | |
| OpExecutionMode %2 OriginUpperLeft | |
| OpSource GLSL 330 | |
| OpName %2 "main" | |
| OpName %3 "c" | |
| OpDecorate %3 Location 0 | |
| %4 = OpTypeVoid | |
| %5 = OpTypeFunction %4 | |
| %6 = OpTypeInt 32 1 | |
| %7 = OpTypePointer Function %6 | |
| %8 = OpConstant %6 0 | |
| %9 = OpTypeBool | |
| %10 = OpConstant %6 10 | |
| %11 = OpConstant %6 1 | |
| %12 = OpTypeFloat 32 | |
| %13 = OpTypeVector %12 4 | |
| %14 = OpTypePointer Output %13 | |
| %3 = OpVariable %14 Output | |
| %2 = OpFunction %4 None %5 | |
| %15 = OpLabel | |
| %16 = OpINotEqual %9 %8 %8 | |
| OpSelectionMerge %17 None | |
| OpBranchConditional %16 %18 %17 | |
| %18 = OpLabel | |
| OpBranch %19 | |
| %19 = OpLabel | |
| %20 = OpPhi %6 %8 %18 %21 %22 | |
| OpLoopMerge %23 %22 None | |
| OpBranch %24 | |
| %24 = OpLabel | |
| %25 = OpSLessThan %9 %20 %10 | |
| OpBranchConditional %25 %26 %23 | |
| %26 = OpLabel | |
| OpBranch %22 | |
| %22 = OpLabel | |
| %21 = OpIAdd %6 %20 %11 | |
| OpBranch %19 | |
| %23 = OpLabel | |
| OpBranch %17 | |
| %17 = OpLabel | |
| %27 = OpPhi %6 %8 %15 %20 %23 | |
| %28 = OpINotEqual %9 %27 %8 | |
| OpSelectionMerge %29 None | |
| OpBranchConditional %28 %30 %29 | |
| %30 = OpLabel | |
| OpBranch %29 | |
| %29 = OpLabel | |
| %31 = OpPhi %6 %27 %17 %11 %30 | |
| OpReturn | |
| OpFunctionEnd | |
| )"; | |
| std::unique_ptr<IRContext> context = | |
| BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text, | |
| SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS); | |
| Module* module = context->module(); | |
| EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n" | |
| << text << std::endl; | |
| const Function* f = spvtest::GetFunction(module, 2); | |
| LoopDescriptor ld{context.get(), f}; | |
| Loop* loop = ld[19]; | |
| EXPECT_FALSE(loop->IsLCSSA()); | |
| LoopUtils Util(context.get(), loop); | |
| Util.MakeLoopClosedSSA(); | |
| EXPECT_TRUE(loop->IsLCSSA()); | |
| Match(text, context.get()); | |
| } | |
| /* | |
| Generated from the following GLSL + --eliminate-local-multi-store | |
| #version 330 core | |
| void main() { | |
| int i = 0; | |
| if (i != 0) { | |
| for (; i < 10; i++) { | |
| if (i > 5) break; | |
| } | |
| } | |
| if (i != 0) { | |
| i = 1; | |
| } | |
| } | |
| */ | |
| TEST_F(LCSSATest, LCSSAWithBreak) { | |
| const std::string text = R"( | |
| ; CHECK: OpLoopMerge [[merge:%\w+]] %19 None | |
| ; CHECK: [[merge]] = OpLabel | |
| ; CHECK-NEXT: [[phi:%\w+]] = OpPhi {{%\w+}} %17 %21 %17 %26 | |
| ; CHECK: %14 = OpLabel | |
| ; CHECK-NEXT: {{%\w+}} = OpPhi {{%\w+}} %7 %12 [[phi]] [[merge]] | |
| OpCapability Shader | |
| %1 = OpExtInstImport "GLSL.std.450" | |
| OpMemoryModel Logical GLSL450 | |
| OpEntryPoint Fragment %2 "main" | |
| OpExecutionMode %2 OriginUpperLeft | |
| OpSource GLSL 330 | |
| OpName %2 "main" | |
| %3 = OpTypeVoid | |
| %4 = OpTypeFunction %3 | |
| %5 = OpTypeInt 32 1 | |
| %6 = OpTypePointer Function %5 | |
| %7 = OpConstant %5 0 | |
| %8 = OpTypeBool | |
| %9 = OpConstant %5 10 | |
| %10 = OpConstant %5 5 | |
| %11 = OpConstant %5 1 | |
| %2 = OpFunction %3 None %4 | |
| %12 = OpLabel | |
| %13 = OpINotEqual %8 %7 %7 | |
| OpSelectionMerge %14 None | |
| OpBranchConditional %13 %15 %14 | |
| %15 = OpLabel | |
| OpBranch %16 | |
| %16 = OpLabel | |
| %17 = OpPhi %5 %7 %15 %18 %19 | |
| OpLoopMerge %20 %19 None | |
| OpBranch %21 | |
| %21 = OpLabel | |
| %22 = OpSLessThan %8 %17 %9 | |
| OpBranchConditional %22 %23 %20 | |
| %23 = OpLabel | |
| %24 = OpSGreaterThan %8 %17 %10 | |
| OpSelectionMerge %25 None | |
| OpBranchConditional %24 %26 %25 | |
| %26 = OpLabel | |
| OpBranch %20 | |
| %25 = OpLabel | |
| OpBranch %19 | |
| %19 = OpLabel | |
| %18 = OpIAdd %5 %17 %11 | |
| OpBranch %16 | |
| %20 = OpLabel | |
| OpBranch %14 | |
| %14 = OpLabel | |
| %27 = OpPhi %5 %7 %12 %17 %20 | |
| %28 = OpINotEqual %8 %27 %7 | |
| OpSelectionMerge %29 None | |
| OpBranchConditional %28 %30 %29 | |
| %30 = OpLabel | |
| OpBranch %29 | |
| %29 = OpLabel | |
| %31 = OpPhi %5 %27 %14 %11 %30 | |
| OpReturn | |
| OpFunctionEnd | |
| )"; | |
| std::unique_ptr<IRContext> context = | |
| BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text, | |
| SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS); | |
| Module* module = context->module(); | |
| EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n" | |
| << text << std::endl; | |
| const Function* f = spvtest::GetFunction(module, 2); | |
| LoopDescriptor ld{context.get(), f}; | |
| Loop* loop = ld[19]; | |
| EXPECT_FALSE(loop->IsLCSSA()); | |
| LoopUtils Util(context.get(), loop); | |
| Util.MakeLoopClosedSSA(); | |
| EXPECT_TRUE(loop->IsLCSSA()); | |
| Match(text, context.get()); | |
| } | |
| /* | |
| Generated from the following GLSL + --eliminate-local-multi-store | |
| #version 330 core | |
| void main() { | |
| int i = 0; | |
| for (; i < 10; i++) {} | |
| for (int j = i; j < 10;) { j = i + j; } | |
| } | |
| */ | |
| TEST_F(LCSSATest, LCSSAUseInNonEligiblePhi) { | |
| const std::string text = R"( | |
| ; CHECK: %12 = OpLabel | |
| ; CHECK-NEXT: [[def_to_close:%\w+]] = OpPhi {{%\w+}} {{%\w+}} {{%\w+}} {{%\w+}} [[continue:%\w+]] | |
| ; CHECK-NEXT: OpLoopMerge [[merge:%\w+]] [[continue]] None | |
| ; CHECK: [[merge]] = OpLabel | |
| ; CHECK-NEXT: [[closing_phi:%\w+]] = OpPhi {{%\w+}} [[def_to_close]] %17 | |
| ; CHECK: %16 = OpLabel | |
| ; CHECK-NEXT: [[use_in_phi:%\w+]] = OpPhi {{%\w+}} %21 %22 [[closing_phi]] [[merge]] | |
| ; CHECK: OpIAdd {{%\w+}} [[closing_phi]] [[use_in_phi]] | |
| OpCapability Shader | |
| %1 = OpExtInstImport "GLSL.std.450" | |
| OpMemoryModel Logical GLSL450 | |
| OpEntryPoint Fragment %2 "main" | |
| OpExecutionMode %2 OriginUpperLeft | |
| OpSource GLSL 330 | |
| OpName %2 "main" | |
| %3 = OpTypeVoid | |
| %4 = OpTypeFunction %3 | |
| %5 = OpTypeInt 32 1 | |
| %6 = OpTypePointer Function %5 | |
| %7 = OpConstant %5 0 | |
| %8 = OpConstant %5 10 | |
| %9 = OpTypeBool | |
| %10 = OpConstant %5 1 | |
| %2 = OpFunction %3 None %4 | |
| %11 = OpLabel | |
| OpBranch %12 | |
| %12 = OpLabel | |
| %13 = OpPhi %5 %7 %11 %14 %15 | |
| OpLoopMerge %16 %15 None | |
| OpBranch %17 | |
| %17 = OpLabel | |
| %18 = OpSLessThan %9 %13 %8 | |
| OpBranchConditional %18 %19 %16 | |
| %19 = OpLabel | |
| OpBranch %15 | |
| %15 = OpLabel | |
| %14 = OpIAdd %5 %13 %10 | |
| OpBranch %12 | |
| %16 = OpLabel | |
| %20 = OpPhi %5 %13 %17 %21 %22 | |
| OpLoopMerge %23 %22 None | |
| OpBranch %24 | |
| %24 = OpLabel | |
| %25 = OpSLessThan %9 %20 %8 | |
| OpBranchConditional %25 %26 %23 | |
| %26 = OpLabel | |
| %21 = OpIAdd %5 %13 %20 | |
| OpBranch %22 | |
| %22 = OpLabel | |
| OpBranch %16 | |
| %23 = OpLabel | |
| OpReturn | |
| OpFunctionEnd | |
| )"; | |
| std::unique_ptr<IRContext> context = | |
| BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text, | |
| SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS); | |
| Module* module = context->module(); | |
| EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n" | |
| << text << std::endl; | |
| const Function* f = spvtest::GetFunction(module, 2); | |
| LoopDescriptor ld{context.get(), f}; | |
| Loop* loop = ld[12]; | |
| EXPECT_FALSE(loop->IsLCSSA()); | |
| LoopUtils Util(context.get(), loop); | |
| Util.MakeLoopClosedSSA(); | |
| EXPECT_TRUE(loop->IsLCSSA()); | |
| Match(text, context.get()); | |
| } | |
| } // namespace | |
| } // namespace opt | |
| } // namespace spvtools |