| // 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 "source/opt/scalar_analysis.h" |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "gmock/gmock.h" |
| #include "source/opt/pass.h" |
| #include "test/opt/assembly_builder.h" |
| #include "test/opt/function_utils.h" |
| #include "test/opt/pass_fixture.h" |
| #include "test/opt/pass_utils.h" |
| |
| namespace spvtools { |
| namespace opt { |
| namespace { |
| |
| using ::testing::UnorderedElementsAre; |
| using ScalarAnalysisTest = PassTest<::testing::Test>; |
| |
| /* |
| Generated from the following GLSL + --eliminate-local-multi-store |
| |
| #version 410 core |
| layout (location = 1) out float array[10]; |
| void main() { |
| for (int i = 0; i < 10; ++i) { |
| array[i] = array[i+1]; |
| } |
| } |
| */ |
| TEST_F(ScalarAnalysisTest, BasicEvolutionTest) { |
| const std::string text = R"( |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %24 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource GLSL 410 |
| OpName %4 "main" |
| OpName %24 "array" |
| OpDecorate %24 Location 1 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeInt 32 1 |
| %7 = OpTypePointer Function %6 |
| %9 = OpConstant %6 0 |
| %16 = OpConstant %6 10 |
| %17 = OpTypeBool |
| %19 = OpTypeFloat 32 |
| %20 = OpTypeInt 32 0 |
| %21 = OpConstant %20 10 |
| %22 = OpTypeArray %19 %21 |
| %23 = OpTypePointer Output %22 |
| %24 = OpVariable %23 Output |
| %27 = OpConstant %6 1 |
| %29 = OpTypePointer Output %19 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| OpBranch %10 |
| %10 = OpLabel |
| %35 = OpPhi %6 %9 %5 %34 %13 |
| OpLoopMerge %12 %13 None |
| OpBranch %14 |
| %14 = OpLabel |
| %18 = OpSLessThan %17 %35 %16 |
| OpBranchConditional %18 %11 %12 |
| %11 = OpLabel |
| %28 = OpIAdd %6 %35 %27 |
| %30 = OpAccessChain %29 %24 %28 |
| %31 = OpLoad %19 %30 |
| %32 = OpAccessChain %29 %24 %35 |
| OpStore %32 %31 |
| OpBranch %13 |
| %13 = OpLabel |
| %34 = OpIAdd %6 %35 %27 |
| OpBranch %10 |
| %12 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| )"; |
| // clang-format on |
| 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, 4); |
| ScalarEvolutionAnalysis analysis{context.get()}; |
| |
| const Instruction* store = nullptr; |
| const Instruction* load = nullptr; |
| for (const Instruction& inst : *spvtest::GetBasicBlock(f, 11)) { |
| if (inst.opcode() == spv::Op::OpStore) { |
| store = &inst; |
| } |
| if (inst.opcode() == spv::Op::OpLoad) { |
| load = &inst; |
| } |
| } |
| |
| EXPECT_NE(load, nullptr); |
| EXPECT_NE(store, nullptr); |
| |
| Instruction* access_chain = |
| context->get_def_use_mgr()->GetDef(load->GetSingleWordInOperand(0)); |
| |
| Instruction* child = context->get_def_use_mgr()->GetDef( |
| access_chain->GetSingleWordInOperand(1)); |
| const SENode* node = analysis.AnalyzeInstruction(child); |
| |
| EXPECT_NE(node, nullptr); |
| |
| // Unsimplified node should have the form of ADD(REC(0,1), 1) |
| EXPECT_EQ(node->GetType(), SENode::Add); |
| |
| const SENode* child_1 = node->GetChild(0); |
| EXPECT_TRUE(child_1->GetType() == SENode::Constant || |
| child_1->GetType() == SENode::RecurrentAddExpr); |
| |
| const SENode* child_2 = node->GetChild(1); |
| EXPECT_TRUE(child_2->GetType() == SENode::Constant || |
| child_2->GetType() == SENode::RecurrentAddExpr); |
| |
| SENode* simplified = analysis.SimplifyExpression(const_cast<SENode*>(node)); |
| // Simplified should be in the form of REC(1,1) |
| EXPECT_EQ(simplified->GetType(), SENode::RecurrentAddExpr); |
| |
| EXPECT_EQ(simplified->GetChild(0)->GetType(), SENode::Constant); |
| EXPECT_EQ(simplified->GetChild(0)->AsSEConstantNode()->FoldToSingleValue(), |
| 1); |
| |
| EXPECT_EQ(simplified->GetChild(1)->GetType(), SENode::Constant); |
| EXPECT_EQ(simplified->GetChild(1)->AsSEConstantNode()->FoldToSingleValue(), |
| 1); |
| |
| EXPECT_EQ(simplified->GetChild(0), simplified->GetChild(1)); |
| } |
| |
| /* |
| Generated from the following GLSL + --eliminate-local-multi-store |
| |
| #version 410 core |
| layout (location = 1) out float array[10]; |
| layout (location = 2) flat in int loop_invariant; |
| void main() { |
| for (int i = 0; i < 10; ++i) { |
| array[i] = array[i+loop_invariant]; |
| } |
| } |
| |
| */ |
| TEST_F(ScalarAnalysisTest, LoadTest) { |
| const std::string text = R"( |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %2 "main" %3 %4 |
| OpExecutionMode %2 OriginUpperLeft |
| OpSource GLSL 430 |
| OpName %2 "main" |
| OpName %3 "array" |
| OpName %4 "loop_invariant" |
| OpDecorate %3 Location 1 |
| OpDecorate %4 Flat |
| OpDecorate %4 Location 2 |
| %5 = OpTypeVoid |
| %6 = OpTypeFunction %5 |
| %7 = OpTypeInt 32 1 |
| %8 = OpTypePointer Function %7 |
| %9 = OpConstant %7 0 |
| %10 = OpConstant %7 10 |
| %11 = OpTypeBool |
| %12 = OpTypeFloat 32 |
| %13 = OpTypeInt 32 0 |
| %14 = OpConstant %13 10 |
| %15 = OpTypeArray %12 %14 |
| %16 = OpTypePointer Output %15 |
| %3 = OpVariable %16 Output |
| %17 = OpTypePointer Input %7 |
| %4 = OpVariable %17 Input |
| %18 = OpTypePointer Output %12 |
| %19 = OpConstant %7 1 |
| %2 = OpFunction %5 None %6 |
| %20 = OpLabel |
| OpBranch %21 |
| %21 = OpLabel |
| %22 = OpPhi %7 %9 %20 %23 %24 |
| OpLoopMerge %25 %24 None |
| OpBranch %26 |
| %26 = OpLabel |
| %27 = OpSLessThan %11 %22 %10 |
| OpBranchConditional %27 %28 %25 |
| %28 = OpLabel |
| %29 = OpLoad %7 %4 |
| %30 = OpIAdd %7 %22 %29 |
| %31 = OpAccessChain %18 %3 %30 |
| %32 = OpLoad %12 %31 |
| %33 = OpAccessChain %18 %3 %22 |
| OpStore %33 %32 |
| OpBranch %24 |
| %24 = OpLabel |
| %23 = OpIAdd %7 %22 %19 |
| OpBranch %21 |
| %25 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| )"; |
| // clang-format on |
| 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); |
| ScalarEvolutionAnalysis analysis{context.get()}; |
| |
| const Instruction* load = nullptr; |
| for (const Instruction& inst : *spvtest::GetBasicBlock(f, 28)) { |
| if (inst.opcode() == spv::Op::OpLoad) { |
| load = &inst; |
| } |
| } |
| |
| EXPECT_NE(load, nullptr); |
| |
| Instruction* access_chain = |
| context->get_def_use_mgr()->GetDef(load->GetSingleWordInOperand(0)); |
| |
| Instruction* child = context->get_def_use_mgr()->GetDef( |
| access_chain->GetSingleWordInOperand(1)); |
| // const SENode* node = |
| // analysis.GetNodeFromInstruction(child->unique_id()); |
| |
| const SENode* node = analysis.AnalyzeInstruction(child); |
| |
| EXPECT_NE(node, nullptr); |
| |
| // Unsimplified node should have the form of ADD(REC(0,1), X) |
| EXPECT_EQ(node->GetType(), SENode::Add); |
| |
| const SENode* child_1 = node->GetChild(0); |
| EXPECT_TRUE(child_1->GetType() == SENode::ValueUnknown || |
| child_1->GetType() == SENode::RecurrentAddExpr); |
| |
| const SENode* child_2 = node->GetChild(1); |
| EXPECT_TRUE(child_2->GetType() == SENode::ValueUnknown || |
| child_2->GetType() == SENode::RecurrentAddExpr); |
| |
| SENode* simplified = analysis.SimplifyExpression(const_cast<SENode*>(node)); |
| EXPECT_EQ(simplified->GetType(), SENode::RecurrentAddExpr); |
| |
| const SERecurrentNode* rec = simplified->AsSERecurrentNode(); |
| |
| EXPECT_NE(rec->GetChild(0), rec->GetChild(1)); |
| |
| EXPECT_EQ(rec->GetOffset()->GetType(), SENode::ValueUnknown); |
| |
| EXPECT_EQ(rec->GetCoefficient()->GetType(), SENode::Constant); |
| EXPECT_EQ(rec->GetCoefficient()->AsSEConstantNode()->FoldToSingleValue(), 1u); |
| } |
| |
| /* |
| Generated from the following GLSL + --eliminate-local-multi-store |
| |
| #version 410 core |
| layout (location = 1) out float array[10]; |
| layout (location = 2) flat in int loop_invariant; |
| void main() { |
| array[0] = array[loop_invariant * 2 + 4 + 5 - 24 - loop_invariant - |
| loop_invariant+ 16 * 3]; |
| } |
| |
| */ |
| TEST_F(ScalarAnalysisTest, SimplifySimple) { |
| const std::string text = R"( |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %2 "main" %3 %4 |
| OpExecutionMode %2 OriginUpperLeft |
| OpSource GLSL 430 |
| OpName %2 "main" |
| OpName %3 "array" |
| OpName %4 "loop_invariant" |
| OpDecorate %3 Location 1 |
| OpDecorate %4 Flat |
| OpDecorate %4 Location 2 |
| %5 = OpTypeVoid |
| %6 = OpTypeFunction %5 |
| %7 = OpTypeFloat 32 |
| %8 = OpTypeInt 32 0 |
| %9 = OpConstant %8 10 |
| %10 = OpTypeArray %7 %9 |
| %11 = OpTypePointer Output %10 |
| %3 = OpVariable %11 Output |
| %12 = OpTypeInt 32 1 |
| %13 = OpConstant %12 0 |
| %14 = OpTypePointer Input %12 |
| %4 = OpVariable %14 Input |
| %15 = OpConstant %12 2 |
| %16 = OpConstant %12 4 |
| %17 = OpConstant %12 5 |
| %18 = OpConstant %12 24 |
| %19 = OpConstant %12 48 |
| %20 = OpTypePointer Output %7 |
| %2 = OpFunction %5 None %6 |
| %21 = OpLabel |
| %22 = OpLoad %12 %4 |
| %23 = OpIMul %12 %22 %15 |
| %24 = OpIAdd %12 %23 %16 |
| %25 = OpIAdd %12 %24 %17 |
| %26 = OpISub %12 %25 %18 |
| %28 = OpISub %12 %26 %22 |
| %30 = OpISub %12 %28 %22 |
| %31 = OpIAdd %12 %30 %19 |
| %32 = OpAccessChain %20 %3 %31 |
| %33 = OpLoad %7 %32 |
| %34 = OpAccessChain %20 %3 %13 |
| OpStore %34 %33 |
| OpReturn |
| OpFunctionEnd |
| )"; |
| // clang-format on |
| 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); |
| ScalarEvolutionAnalysis analysis{context.get()}; |
| |
| const Instruction* load = nullptr; |
| for (const Instruction& inst : *spvtest::GetBasicBlock(f, 21)) { |
| if (inst.opcode() == spv::Op::OpLoad && inst.result_id() == 33) { |
| load = &inst; |
| } |
| } |
| |
| EXPECT_NE(load, nullptr); |
| |
| Instruction* access_chain = |
| context->get_def_use_mgr()->GetDef(load->GetSingleWordInOperand(0)); |
| |
| Instruction* child = context->get_def_use_mgr()->GetDef( |
| access_chain->GetSingleWordInOperand(1)); |
| |
| const SENode* node = analysis.AnalyzeInstruction(child); |
| |
| // Unsimplified is a very large graph with an add at the top. |
| EXPECT_NE(node, nullptr); |
| EXPECT_EQ(node->GetType(), SENode::Add); |
| |
| // Simplified node should resolve down to a constant expression as the loads |
| // will eliminate themselves. |
| SENode* simplified = analysis.SimplifyExpression(const_cast<SENode*>(node)); |
| |
| EXPECT_EQ(simplified->GetType(), SENode::Constant); |
| EXPECT_EQ(simplified->AsSEConstantNode()->FoldToSingleValue(), 33u); |
| } |
| |
| /* |
| Generated from the following GLSL + --eliminate-local-multi-store |
| |
| #version 410 core |
| layout(location = 0) in vec4 c; |
| layout (location = 1) out float array[10]; |
| void main() { |
| int N = int(c.x); |
| for (int i = 0; i < 10; ++i) { |
| array[i] = array[i]; |
| array[i] = array[i-1]; |
| array[i] = array[i+1]; |
| array[i+1] = array[i+1]; |
| array[i+N] = array[i+N]; |
| array[i] = array[i+N]; |
| } |
| } |
| |
| */ |
| TEST_F(ScalarAnalysisTest, Simplify) { |
| const std::string text = R"( OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %12 %33 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource GLSL 410 |
| OpName %4 "main" |
| OpName %8 "N" |
| OpName %12 "c" |
| OpName %19 "i" |
| OpName %33 "array" |
| OpDecorate %12 Location 0 |
| OpDecorate %33 Location 1 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeInt 32 1 |
| %7 = OpTypePointer Function %6 |
| %9 = OpTypeFloat 32 |
| %10 = OpTypeVector %9 4 |
| %11 = OpTypePointer Input %10 |
| %12 = OpVariable %11 Input |
| %13 = OpTypeInt 32 0 |
| %14 = OpConstant %13 0 |
| %15 = OpTypePointer Input %9 |
| %20 = OpConstant %6 0 |
| %27 = OpConstant %6 10 |
| %28 = OpTypeBool |
| %30 = OpConstant %13 10 |
| %31 = OpTypeArray %9 %30 |
| %32 = OpTypePointer Output %31 |
| %33 = OpVariable %32 Output |
| %36 = OpTypePointer Output %9 |
| %42 = OpConstant %6 1 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %8 = OpVariable %7 Function |
| %19 = OpVariable %7 Function |
| %16 = OpAccessChain %15 %12 %14 |
| %17 = OpLoad %9 %16 |
| %18 = OpConvertFToS %6 %17 |
| OpStore %8 %18 |
| OpStore %19 %20 |
| OpBranch %21 |
| %21 = OpLabel |
| %78 = OpPhi %6 %20 %5 %77 %24 |
| OpLoopMerge %23 %24 None |
| OpBranch %25 |
| %25 = OpLabel |
| %29 = OpSLessThan %28 %78 %27 |
| OpBranchConditional %29 %22 %23 |
| %22 = OpLabel |
| %37 = OpAccessChain %36 %33 %78 |
| %38 = OpLoad %9 %37 |
| %39 = OpAccessChain %36 %33 %78 |
| OpStore %39 %38 |
| %43 = OpISub %6 %78 %42 |
| %44 = OpAccessChain %36 %33 %43 |
| %45 = OpLoad %9 %44 |
| %46 = OpAccessChain %36 %33 %78 |
| OpStore %46 %45 |
| %49 = OpIAdd %6 %78 %42 |
| %50 = OpAccessChain %36 %33 %49 |
| %51 = OpLoad %9 %50 |
| %52 = OpAccessChain %36 %33 %78 |
| OpStore %52 %51 |
| %54 = OpIAdd %6 %78 %42 |
| %56 = OpIAdd %6 %78 %42 |
| %57 = OpAccessChain %36 %33 %56 |
| %58 = OpLoad %9 %57 |
| %59 = OpAccessChain %36 %33 %54 |
| OpStore %59 %58 |
| %62 = OpIAdd %6 %78 %18 |
| %65 = OpIAdd %6 %78 %18 |
| %66 = OpAccessChain %36 %33 %65 |
| %67 = OpLoad %9 %66 |
| %68 = OpAccessChain %36 %33 %62 |
| OpStore %68 %67 |
| %72 = OpIAdd %6 %78 %18 |
| %73 = OpAccessChain %36 %33 %72 |
| %74 = OpLoad %9 %73 |
| %75 = OpAccessChain %36 %33 %78 |
| OpStore %75 %74 |
| OpBranch %24 |
| %24 = OpLabel |
| %77 = OpIAdd %6 %78 %42 |
| OpStore %19 %77 |
| OpBranch %21 |
| %23 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| )"; |
| // clang-format on |
| 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, 4); |
| ScalarEvolutionAnalysis analysis{context.get()}; |
| |
| const Instruction* loads[6]; |
| const Instruction* stores[6]; |
| int load_count = 0; |
| int store_count = 0; |
| |
| for (const Instruction& inst : *spvtest::GetBasicBlock(f, 22)) { |
| if (inst.opcode() == spv::Op::OpLoad) { |
| loads[load_count] = &inst; |
| ++load_count; |
| } |
| if (inst.opcode() == spv::Op::OpStore) { |
| stores[store_count] = &inst; |
| ++store_count; |
| } |
| } |
| |
| EXPECT_EQ(load_count, 6); |
| EXPECT_EQ(store_count, 6); |
| |
| Instruction* load_access_chain; |
| Instruction* store_access_chain; |
| Instruction* load_child; |
| Instruction* store_child; |
| SENode* load_node; |
| SENode* store_node; |
| SENode* subtract_node; |
| SENode* simplified_node; |
| |
| // Testing [i] - [i] == 0 |
| load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[0]->GetSingleWordInOperand(0)); |
| store_access_chain = |
| context->get_def_use_mgr()->GetDef(stores[0]->GetSingleWordInOperand(0)); |
| |
| load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| store_child = context->get_def_use_mgr()->GetDef( |
| store_access_chain->GetSingleWordInOperand(1)); |
| |
| load_node = analysis.AnalyzeInstruction(load_child); |
| store_node = analysis.AnalyzeInstruction(store_child); |
| |
| subtract_node = analysis.CreateSubtraction(store_node, load_node); |
| simplified_node = analysis.SimplifyExpression(subtract_node); |
| EXPECT_EQ(simplified_node->GetType(), SENode::Constant); |
| EXPECT_EQ(simplified_node->AsSEConstantNode()->FoldToSingleValue(), 0u); |
| |
| // Testing [i] - [i-1] == 1 |
| load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[1]->GetSingleWordInOperand(0)); |
| store_access_chain = |
| context->get_def_use_mgr()->GetDef(stores[1]->GetSingleWordInOperand(0)); |
| |
| load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| store_child = context->get_def_use_mgr()->GetDef( |
| store_access_chain->GetSingleWordInOperand(1)); |
| |
| load_node = analysis.AnalyzeInstruction(load_child); |
| store_node = analysis.AnalyzeInstruction(store_child); |
| |
| subtract_node = analysis.CreateSubtraction(store_node, load_node); |
| simplified_node = analysis.SimplifyExpression(subtract_node); |
| |
| EXPECT_EQ(simplified_node->GetType(), SENode::Constant); |
| EXPECT_EQ(simplified_node->AsSEConstantNode()->FoldToSingleValue(), 1u); |
| |
| // Testing [i] - [i+1] == -1 |
| load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[2]->GetSingleWordInOperand(0)); |
| store_access_chain = |
| context->get_def_use_mgr()->GetDef(stores[2]->GetSingleWordInOperand(0)); |
| |
| load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| store_child = context->get_def_use_mgr()->GetDef( |
| store_access_chain->GetSingleWordInOperand(1)); |
| |
| load_node = analysis.AnalyzeInstruction(load_child); |
| store_node = analysis.AnalyzeInstruction(store_child); |
| |
| subtract_node = analysis.CreateSubtraction(store_node, load_node); |
| simplified_node = analysis.SimplifyExpression(subtract_node); |
| EXPECT_EQ(simplified_node->GetType(), SENode::Constant); |
| EXPECT_EQ(simplified_node->AsSEConstantNode()->FoldToSingleValue(), -1); |
| |
| // Testing [i+1] - [i+1] == 0 |
| load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[3]->GetSingleWordInOperand(0)); |
| store_access_chain = |
| context->get_def_use_mgr()->GetDef(stores[3]->GetSingleWordInOperand(0)); |
| |
| load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| store_child = context->get_def_use_mgr()->GetDef( |
| store_access_chain->GetSingleWordInOperand(1)); |
| |
| load_node = analysis.AnalyzeInstruction(load_child); |
| store_node = analysis.AnalyzeInstruction(store_child); |
| |
| subtract_node = analysis.CreateSubtraction(store_node, load_node); |
| simplified_node = analysis.SimplifyExpression(subtract_node); |
| EXPECT_EQ(simplified_node->GetType(), SENode::Constant); |
| EXPECT_EQ(simplified_node->AsSEConstantNode()->FoldToSingleValue(), 0u); |
| |
| // Testing [i+N] - [i+N] == 0 |
| load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[4]->GetSingleWordInOperand(0)); |
| store_access_chain = |
| context->get_def_use_mgr()->GetDef(stores[4]->GetSingleWordInOperand(0)); |
| |
| load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| store_child = context->get_def_use_mgr()->GetDef( |
| store_access_chain->GetSingleWordInOperand(1)); |
| |
| load_node = analysis.AnalyzeInstruction(load_child); |
| store_node = analysis.AnalyzeInstruction(store_child); |
| |
| subtract_node = analysis.CreateSubtraction(store_node, load_node); |
| |
| simplified_node = analysis.SimplifyExpression(subtract_node); |
| EXPECT_EQ(simplified_node->GetType(), SENode::Constant); |
| EXPECT_EQ(simplified_node->AsSEConstantNode()->FoldToSingleValue(), 0u); |
| |
| // Testing [i] - [i+N] == -N |
| load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[5]->GetSingleWordInOperand(0)); |
| store_access_chain = |
| context->get_def_use_mgr()->GetDef(stores[5]->GetSingleWordInOperand(0)); |
| |
| load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| store_child = context->get_def_use_mgr()->GetDef( |
| store_access_chain->GetSingleWordInOperand(1)); |
| |
| load_node = analysis.AnalyzeInstruction(load_child); |
| store_node = analysis.AnalyzeInstruction(store_child); |
| |
| subtract_node = analysis.CreateSubtraction(store_node, load_node); |
| simplified_node = analysis.SimplifyExpression(subtract_node); |
| EXPECT_EQ(simplified_node->GetType(), SENode::Negative); |
| } |
| |
| /* |
| Generated from the following GLSL + --eliminate-local-multi-store |
| |
| #version 430 |
| layout(location = 1) out float array[10]; |
| layout(location = 2) flat in int loop_invariant; |
| void main(void) { |
| for (int i = 0; i < 10; ++i) { |
| array[i * 2 + i * 5] = array[i * i * 2]; |
| array[i * 2] = array[i * 5]; |
| } |
| } |
| |
| */ |
| |
| TEST_F(ScalarAnalysisTest, SimplifyMultiplyInductions) { |
| const std::string text = R"( |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %2 "main" %3 %4 |
| OpExecutionMode %2 OriginUpperLeft |
| OpSource GLSL 430 |
| OpName %2 "main" |
| OpName %5 "i" |
| OpName %3 "array" |
| OpName %4 "loop_invariant" |
| OpDecorate %3 Location 1 |
| OpDecorate %4 Flat |
| OpDecorate %4 Location 2 |
| %6 = OpTypeVoid |
| %7 = OpTypeFunction %6 |
| %8 = OpTypeInt 32 1 |
| %9 = OpTypePointer Function %8 |
| %10 = OpConstant %8 0 |
| %11 = OpConstant %8 10 |
| %12 = OpTypeBool |
| %13 = OpTypeFloat 32 |
| %14 = OpTypeInt 32 0 |
| %15 = OpConstant %14 10 |
| %16 = OpTypeArray %13 %15 |
| %17 = OpTypePointer Output %16 |
| %3 = OpVariable %17 Output |
| %18 = OpConstant %8 2 |
| %19 = OpConstant %8 5 |
| %20 = OpTypePointer Output %13 |
| %21 = OpConstant %8 1 |
| %22 = OpTypePointer Input %8 |
| %4 = OpVariable %22 Input |
| %2 = OpFunction %6 None %7 |
| %23 = OpLabel |
| %5 = OpVariable %9 Function |
| OpStore %5 %10 |
| OpBranch %24 |
| %24 = OpLabel |
| %25 = OpPhi %8 %10 %23 %26 %27 |
| OpLoopMerge %28 %27 None |
| OpBranch %29 |
| %29 = OpLabel |
| %30 = OpSLessThan %12 %25 %11 |
| OpBranchConditional %30 %31 %28 |
| %31 = OpLabel |
| %32 = OpIMul %8 %25 %18 |
| %33 = OpIMul %8 %25 %19 |
| %34 = OpIAdd %8 %32 %33 |
| %35 = OpIMul %8 %25 %25 |
| %36 = OpIMul %8 %35 %18 |
| %37 = OpAccessChain %20 %3 %36 |
| %38 = OpLoad %13 %37 |
| %39 = OpAccessChain %20 %3 %34 |
| OpStore %39 %38 |
| %40 = OpIMul %8 %25 %18 |
| %41 = OpIMul %8 %25 %19 |
| %42 = OpAccessChain %20 %3 %41 |
| %43 = OpLoad %13 %42 |
| %44 = OpAccessChain %20 %3 %40 |
| OpStore %44 %43 |
| OpBranch %27 |
| %27 = OpLabel |
| %26 = OpIAdd %8 %25 %21 |
| OpStore %5 %26 |
| OpBranch %24 |
| %28 = 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); |
| ScalarEvolutionAnalysis analysis{context.get()}; |
| |
| const Instruction* loads[2] = {nullptr, nullptr}; |
| const Instruction* stores[2] = {nullptr, nullptr}; |
| int load_count = 0; |
| int store_count = 0; |
| |
| for (const Instruction& inst : *spvtest::GetBasicBlock(f, 31)) { |
| if (inst.opcode() == spv::Op::OpLoad) { |
| loads[load_count] = &inst; |
| ++load_count; |
| } |
| if (inst.opcode() == spv::Op::OpStore) { |
| stores[store_count] = &inst; |
| ++store_count; |
| } |
| } |
| |
| EXPECT_EQ(load_count, 2); |
| EXPECT_EQ(store_count, 2); |
| |
| Instruction* load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[0]->GetSingleWordInOperand(0)); |
| Instruction* store_access_chain = |
| context->get_def_use_mgr()->GetDef(stores[0]->GetSingleWordInOperand(0)); |
| |
| Instruction* load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| Instruction* store_child = context->get_def_use_mgr()->GetDef( |
| store_access_chain->GetSingleWordInOperand(1)); |
| |
| SENode* store_node = analysis.AnalyzeInstruction(store_child); |
| |
| SENode* store_simplified = analysis.SimplifyExpression(store_node); |
| |
| load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[1]->GetSingleWordInOperand(0)); |
| store_access_chain = |
| context->get_def_use_mgr()->GetDef(stores[1]->GetSingleWordInOperand(0)); |
| load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| store_child = context->get_def_use_mgr()->GetDef( |
| store_access_chain->GetSingleWordInOperand(1)); |
| |
| SENode* second_store = |
| analysis.SimplifyExpression(analysis.AnalyzeInstruction(store_child)); |
| SENode* second_load = |
| analysis.SimplifyExpression(analysis.AnalyzeInstruction(load_child)); |
| SENode* combined_add = analysis.SimplifyExpression( |
| analysis.CreateAddNode(second_load, second_store)); |
| |
| // We're checking that the two recurrent expression have been correctly |
| // folded. In store_simplified they will have been folded as the entire |
| // expression was simplified as one. In combined_add the two expressions have |
| // been simplified one after the other which means the recurrent expressions |
| // aren't exactly the same but should still be folded as they are with respect |
| // to the same loop. |
| EXPECT_EQ(combined_add, store_simplified); |
| } |
| |
| /* |
| Generated from the following GLSL + --eliminate-local-multi-store |
| |
| #version 430 |
| void main(void) { |
| for (int i = 0; i < 10; --i) { |
| array[i] = array[i]; |
| } |
| } |
| |
| */ |
| |
| TEST_F(ScalarAnalysisTest, SimplifyNegativeSteps) { |
| const std::string text = R"( |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %2 "main" %3 %4 |
| OpExecutionMode %2 OriginUpperLeft |
| OpSource GLSL 430 |
| OpName %2 "main" |
| OpName %5 "i" |
| OpName %3 "array" |
| OpName %4 "loop_invariant" |
| OpDecorate %3 Location 1 |
| OpDecorate %4 Flat |
| OpDecorate %4 Location 2 |
| %6 = OpTypeVoid |
| %7 = OpTypeFunction %6 |
| %8 = OpTypeInt 32 1 |
| %9 = OpTypePointer Function %8 |
| %10 = OpConstant %8 0 |
| %11 = OpConstant %8 10 |
| %12 = OpTypeBool |
| %13 = OpTypeFloat 32 |
| %14 = OpTypeInt 32 0 |
| %15 = OpConstant %14 10 |
| %16 = OpTypeArray %13 %15 |
| %17 = OpTypePointer Output %16 |
| %3 = OpVariable %17 Output |
| %18 = OpTypePointer Output %13 |
| %19 = OpConstant %8 1 |
| %20 = OpTypePointer Input %8 |
| %4 = OpVariable %20 Input |
| %2 = OpFunction %6 None %7 |
| %21 = OpLabel |
| %5 = OpVariable %9 Function |
| OpStore %5 %10 |
| OpBranch %22 |
| %22 = OpLabel |
| %23 = OpPhi %8 %10 %21 %24 %25 |
| OpLoopMerge %26 %25 None |
| OpBranch %27 |
| %27 = OpLabel |
| %28 = OpSLessThan %12 %23 %11 |
| OpBranchConditional %28 %29 %26 |
| %29 = OpLabel |
| %30 = OpAccessChain %18 %3 %23 |
| %31 = OpLoad %13 %30 |
| %32 = OpAccessChain %18 %3 %23 |
| OpStore %32 %31 |
| OpBranch %25 |
| %25 = OpLabel |
| %24 = OpISub %8 %23 %19 |
| OpStore %5 %24 |
| OpBranch %22 |
| %26 = 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); |
| ScalarEvolutionAnalysis analysis{context.get()}; |
| |
| const Instruction* loads[1] = {nullptr}; |
| int load_count = 0; |
| |
| for (const Instruction& inst : *spvtest::GetBasicBlock(f, 29)) { |
| if (inst.opcode() == spv::Op::OpLoad) { |
| loads[load_count] = &inst; |
| ++load_count; |
| } |
| } |
| |
| EXPECT_EQ(load_count, 1); |
| |
| Instruction* load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[0]->GetSingleWordInOperand(0)); |
| Instruction* load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| |
| SENode* load_node = analysis.AnalyzeInstruction(load_child); |
| |
| EXPECT_TRUE(load_node); |
| EXPECT_EQ(load_node->GetType(), SENode::RecurrentAddExpr); |
| EXPECT_TRUE(load_node->AsSERecurrentNode()); |
| |
| SENode* child_1 = load_node->AsSERecurrentNode()->GetCoefficient(); |
| SENode* child_2 = load_node->AsSERecurrentNode()->GetOffset(); |
| |
| EXPECT_EQ(child_1->GetType(), SENode::Constant); |
| EXPECT_EQ(child_2->GetType(), SENode::Constant); |
| |
| EXPECT_EQ(child_1->AsSEConstantNode()->FoldToSingleValue(), -1); |
| EXPECT_EQ(child_2->AsSEConstantNode()->FoldToSingleValue(), 0u); |
| |
| SERecurrentNode* load_simplified = |
| analysis.SimplifyExpression(load_node)->AsSERecurrentNode(); |
| |
| EXPECT_TRUE(load_simplified); |
| EXPECT_EQ(load_node, load_simplified); |
| |
| EXPECT_EQ(load_simplified->GetType(), SENode::RecurrentAddExpr); |
| EXPECT_TRUE(load_simplified->AsSERecurrentNode()); |
| |
| SENode* simplified_child_1 = |
| load_simplified->AsSERecurrentNode()->GetCoefficient(); |
| SENode* simplified_child_2 = |
| load_simplified->AsSERecurrentNode()->GetOffset(); |
| |
| EXPECT_EQ(child_1, simplified_child_1); |
| EXPECT_EQ(child_2, simplified_child_2); |
| } |
| |
| /* |
| Generated from the following GLSL + --eliminate-local-multi-store |
| |
| #version 430 |
| void main(void) { |
| for (int i = 0; i < 10; --i) { |
| array[i] = array[i]; |
| } |
| } |
| |
| */ |
| |
| TEST_F(ScalarAnalysisTest, SimplifyInductionsAndLoads) { |
| const std::string text = R"( |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %2 "main" %3 %4 |
| OpExecutionMode %2 OriginUpperLeft |
| OpSource GLSL 430 |
| OpName %2 "main" |
| OpName %5 "i" |
| OpName %3 "array" |
| OpName %4 "N" |
| OpDecorate %3 Location 1 |
| OpDecorate %4 Flat |
| OpDecorate %4 Location 2 |
| %6 = OpTypeVoid |
| %7 = OpTypeFunction %6 |
| %8 = OpTypeInt 32 1 |
| %9 = OpTypePointer Function %8 |
| %10 = OpConstant %8 0 |
| %11 = OpConstant %8 10 |
| %12 = OpTypeBool |
| %13 = OpTypeFloat 32 |
| %14 = OpTypeInt 32 0 |
| %15 = OpConstant %14 10 |
| %16 = OpTypeArray %13 %15 |
| %17 = OpTypePointer Output %16 |
| %3 = OpVariable %17 Output |
| %18 = OpConstant %8 2 |
| %19 = OpTypePointer Input %8 |
| %4 = OpVariable %19 Input |
| %20 = OpTypePointer Output %13 |
| %21 = OpConstant %8 1 |
| %2 = OpFunction %6 None %7 |
| %22 = OpLabel |
| %5 = OpVariable %9 Function |
| OpStore %5 %10 |
| OpBranch %23 |
| %23 = OpLabel |
| %24 = OpPhi %8 %10 %22 %25 %26 |
| OpLoopMerge %27 %26 None |
| OpBranch %28 |
| %28 = OpLabel |
| %29 = OpSLessThan %12 %24 %11 |
| OpBranchConditional %29 %30 %27 |
| %30 = OpLabel |
| %31 = OpLoad %8 %4 |
| %32 = OpIMul %8 %18 %31 |
| %33 = OpIAdd %8 %24 %32 |
| %35 = OpIAdd %8 %24 %31 |
| %36 = OpAccessChain %20 %3 %35 |
| %37 = OpLoad %13 %36 |
| %38 = OpAccessChain %20 %3 %33 |
| OpStore %38 %37 |
| %39 = OpIMul %8 %18 %24 |
| %41 = OpIMul %8 %18 %31 |
| %42 = OpIAdd %8 %39 %41 |
| %43 = OpIAdd %8 %42 %21 |
| %44 = OpIMul %8 %18 %24 |
| %46 = OpIAdd %8 %44 %31 |
| %47 = OpIAdd %8 %46 %21 |
| %48 = OpAccessChain %20 %3 %47 |
| %49 = OpLoad %13 %48 |
| %50 = OpAccessChain %20 %3 %43 |
| OpStore %50 %49 |
| OpBranch %26 |
| %26 = OpLabel |
| %25 = OpISub %8 %24 %21 |
| OpStore %5 %25 |
| OpBranch %23 |
| %27 = 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); |
| ScalarEvolutionAnalysis analysis{context.get()}; |
| |
| std::vector<const Instruction*> loads{}; |
| std::vector<const Instruction*> stores{}; |
| |
| for (const Instruction& inst : *spvtest::GetBasicBlock(f, 30)) { |
| if (inst.opcode() == spv::Op::OpLoad) { |
| loads.push_back(&inst); |
| } |
| if (inst.opcode() == spv::Op::OpStore) { |
| stores.push_back(&inst); |
| } |
| } |
| |
| EXPECT_EQ(loads.size(), 3u); |
| EXPECT_EQ(stores.size(), 2u); |
| { |
| Instruction* store_access_chain = context->get_def_use_mgr()->GetDef( |
| stores[0]->GetSingleWordInOperand(0)); |
| |
| Instruction* store_child = context->get_def_use_mgr()->GetDef( |
| store_access_chain->GetSingleWordInOperand(1)); |
| |
| SENode* store_node = analysis.AnalyzeInstruction(store_child); |
| |
| SENode* store_simplified = analysis.SimplifyExpression(store_node); |
| |
| Instruction* load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[1]->GetSingleWordInOperand(0)); |
| |
| Instruction* load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| |
| SENode* load_node = analysis.AnalyzeInstruction(load_child); |
| |
| SENode* load_simplified = analysis.SimplifyExpression(load_node); |
| |
| SENode* difference = |
| analysis.CreateSubtraction(store_simplified, load_simplified); |
| |
| SENode* difference_simplified = analysis.SimplifyExpression(difference); |
| |
| // Check that i+2*N - i*N, turns into just N when both sides have already |
| // been simplified into a single recurrent expression. |
| EXPECT_EQ(difference_simplified->GetType(), SENode::ValueUnknown); |
| |
| // Check that the inverse, i*N - i+2*N turns into -N. |
| SENode* difference_inverse = analysis.SimplifyExpression( |
| analysis.CreateSubtraction(load_simplified, store_simplified)); |
| |
| EXPECT_EQ(difference_inverse->GetType(), SENode::Negative); |
| EXPECT_EQ(difference_inverse->GetChild(0)->GetType(), SENode::ValueUnknown); |
| EXPECT_EQ(difference_inverse->GetChild(0), difference_simplified); |
| } |
| |
| { |
| Instruction* store_access_chain = context->get_def_use_mgr()->GetDef( |
| stores[1]->GetSingleWordInOperand(0)); |
| |
| Instruction* store_child = context->get_def_use_mgr()->GetDef( |
| store_access_chain->GetSingleWordInOperand(1)); |
| SENode* store_node = analysis.AnalyzeInstruction(store_child); |
| SENode* store_simplified = analysis.SimplifyExpression(store_node); |
| |
| Instruction* load_access_chain = |
| context->get_def_use_mgr()->GetDef(loads[2]->GetSingleWordInOperand(0)); |
| |
| Instruction* load_child = context->get_def_use_mgr()->GetDef( |
| load_access_chain->GetSingleWordInOperand(1)); |
| |
| SENode* load_node = analysis.AnalyzeInstruction(load_child); |
| |
| SENode* load_simplified = analysis.SimplifyExpression(load_node); |
| |
| SENode* difference = |
| analysis.CreateSubtraction(store_simplified, load_simplified); |
| SENode* difference_simplified = analysis.SimplifyExpression(difference); |
| |
| // Check that 2*i + 2*N + 1 - 2*i + N + 1, turns into just N when both |
| // sides have already been simplified into a single recurrent expression. |
| EXPECT_EQ(difference_simplified->GetType(), SENode::ValueUnknown); |
| |
| // Check that the inverse, (2*i + N + 1) - (2*i + 2*N + 1) turns into -N. |
| SENode* difference_inverse = analysis.SimplifyExpression( |
| analysis.CreateSubtraction(load_simplified, store_simplified)); |
| |
| EXPECT_EQ(difference_inverse->GetType(), SENode::Negative); |
| EXPECT_EQ(difference_inverse->GetChild(0)->GetType(), SENode::ValueUnknown); |
| EXPECT_EQ(difference_inverse->GetChild(0), difference_simplified); |
| } |
| } |
| |
| /* Generated from the following GLSL + --eliminate-local-multi-store |
| |
| #version 430 |
| layout(location = 1) out float array[10]; |
| layout(location = 2) flat in int N; |
| void main(void) { |
| int step = 0; |
| for (int i = 0; i < N; i += step) { |
| step++; |
| } |
| } |
| */ |
| TEST_F(ScalarAnalysisTest, InductionWithVariantStep) { |
| const std::string text = R"( |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %2 "main" %3 %4 |
| OpExecutionMode %2 OriginUpperLeft |
| OpSource GLSL 430 |
| OpName %2 "main" |
| OpName %5 "step" |
| OpName %6 "i" |
| OpName %3 "N" |
| OpName %4 "array" |
| OpDecorate %3 Flat |
| OpDecorate %3 Location 2 |
| OpDecorate %4 Location 1 |
| %7 = OpTypeVoid |
| %8 = OpTypeFunction %7 |
| %9 = OpTypeInt 32 1 |
| %10 = OpTypePointer Function %9 |
| %11 = OpConstant %9 0 |
| %12 = OpTypePointer Input %9 |
| %3 = OpVariable %12 Input |
| %13 = OpTypeBool |
| %14 = OpConstant %9 1 |
| %15 = OpTypeFloat 32 |
| %16 = OpTypeInt 32 0 |
| %17 = OpConstant %16 10 |
| %18 = OpTypeArray %15 %17 |
| %19 = OpTypePointer Output %18 |
| %4 = OpVariable %19 Output |
| %2 = OpFunction %7 None %8 |
| %20 = OpLabel |
| %5 = OpVariable %10 Function |
| %6 = OpVariable %10 Function |
| OpStore %5 %11 |
| OpStore %6 %11 |
| OpBranch %21 |
| %21 = OpLabel |
| %22 = OpPhi %9 %11 %20 %23 %24 |
| %25 = OpPhi %9 %11 %20 %26 %24 |
| OpLoopMerge %27 %24 None |
| OpBranch %28 |
| %28 = OpLabel |
| %29 = OpLoad %9 %3 |
| %30 = OpSLessThan %13 %25 %29 |
| OpBranchConditional %30 %31 %27 |
| %31 = OpLabel |
| %23 = OpIAdd %9 %22 %14 |
| OpStore %5 %23 |
| OpBranch %24 |
| %24 = OpLabel |
| %26 = OpIAdd %9 %25 %23 |
| OpStore %6 %26 |
| OpBranch %21 |
| %27 = 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); |
| ScalarEvolutionAnalysis analysis{context.get()}; |
| |
| std::vector<const Instruction*> phis{}; |
| |
| for (const Instruction& inst : *spvtest::GetBasicBlock(f, 21)) { |
| if (inst.opcode() == spv::Op::OpPhi) { |
| phis.push_back(&inst); |
| } |
| } |
| |
| EXPECT_EQ(phis.size(), 2u); |
| SENode* phi_node_1 = analysis.AnalyzeInstruction(phis[0]); |
| SENode* phi_node_2 = analysis.AnalyzeInstruction(phis[1]); |
| EXPECT_NE(phi_node_1, nullptr); |
| EXPECT_NE(phi_node_2, nullptr); |
| |
| EXPECT_EQ(phi_node_1->GetType(), SENode::RecurrentAddExpr); |
| EXPECT_EQ(phi_node_2->GetType(), SENode::CanNotCompute); |
| |
| SENode* simplified_1 = analysis.SimplifyExpression(phi_node_1); |
| SENode* simplified_2 = analysis.SimplifyExpression(phi_node_2); |
| |
| EXPECT_EQ(simplified_1->GetType(), SENode::RecurrentAddExpr); |
| EXPECT_EQ(simplified_2->GetType(), SENode::CanNotCompute); |
| } |
| |
| } // namespace |
| } // namespace opt |
| } // namespace spvtools |
