SPIRV-Tools/test/opt/simplification_test.cpp

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// 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 "opt/simplification_pass.h"
#include "assembly_builder.h"
#include "gmock/gmock.h"
#include "pass_fixture.h"
namespace {
using namespace spvtools;
using SimplificationTest = PassTest<::testing::Test>;
#ifdef SPIRV_EFFCEE
TEST_F(SimplificationTest, StraightLineTest) {
// Testing that folding rules are combined in simple straight line code.
const std::string text = R"(OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %i %o
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 430
OpSourceExtension "GL_GOOGLE_cpp_style_line_directive"
OpSourceExtension "GL_GOOGLE_include_directive"
OpName %main "main"
OpName %i "i"
OpName %o "o"
OpDecorate %i Flat
OpDecorate %i Location 0
OpDecorate %o Location 0
%void = OpTypeVoid
%8 = OpTypeFunction %void
%int = OpTypeInt 32 1
%v4int = OpTypeVector %int 4
%int_0 = OpConstant %int 0
%13 = OpConstantComposite %v4int %int_0 %int_0 %int_0 %int_0
%int_1 = OpConstant %int 1
%_ptr_Input_v4int = OpTypePointer Input %v4int
%i = OpVariable %_ptr_Input_v4int Input
%_ptr_Output_int = OpTypePointer Output %int
%o = OpVariable %_ptr_Output_int Output
%main = OpFunction %void None %8
%21 = OpLabel
%31 = OpCompositeInsert %v4int %int_1 %13 0
; CHECK: [[load:%[a-zA-Z_\d]+]] = OpLoad
%23 = OpLoad %v4int %i
%33 = OpCompositeInsert %v4int %int_0 %23 0
%35 = OpCompositeExtract %int %31 0
; CHECK: [[extract:%[a-zA-Z_\d]+]] = OpCompositeExtract %int [[load]] 1
%37 = OpCompositeExtract %int %33 1
; CHECK: [[add:%[a-zA-Z_\d]+]] = OpIAdd %int %int_1 [[extract]]
%29 = OpIAdd %int %35 %37
OpStore %o %29
OpReturn
OpFunctionEnd
)";
SinglePassRunAndMatch<opt::SimplificationPass>(text, false);
}
TEST_F(SimplificationTest, AcrossBasicBlocks) {
// Testing that folding rules are combined across basic blocks.
const std::string text = R"(OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %i %o
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 430
OpSourceExtension "GL_GOOGLE_cpp_style_line_directive"
OpSourceExtension "GL_GOOGLE_include_directive"
OpName %main "main"
OpName %i "i"
OpName %o "o"
OpDecorate %i Flat
OpDecorate %i Location 0
OpDecorate %o Location 0
%void = OpTypeVoid
%8 = OpTypeFunction %void
%int = OpTypeInt 32 1
%v4int = OpTypeVector %int 4
%int_0 = OpConstant %int 0
%_ptr_Input_v4int = OpTypePointer Input %v4int
%i = OpVariable %_ptr_Input_v4int Input
%uint = OpTypeInt 32 0
%uint_0 = OpConstant %uint 0
%_ptr_Input_int = OpTypePointer Input %int
%int_10 = OpConstant %int 10
%bool = OpTypeBool
%int_1 = OpConstant %int 1
%_ptr_Output_int = OpTypePointer Output %int
%o = OpVariable %_ptr_Output_int Output
%main = OpFunction %void None %8
%24 = OpLabel
; CHECK: [[load:%[a-zA-Z_\d]+]] = OpLoad %v4int %i
%25 = OpLoad %v4int %i
%41 = OpCompositeInsert %v4int %int_0 %25 0
%27 = OpAccessChain %_ptr_Input_int %i %uint_0
%28 = OpLoad %int %27
%29 = OpSGreaterThan %bool %28 %int_10
OpSelectionMerge %30 None
OpBranchConditional %29 %31 %32
%31 = OpLabel
%43 = OpCopyObject %v4int %25
OpBranch %30
%32 = OpLabel
%45 = OpCopyObject %v4int %25
OpBranch %30
%30 = OpLabel
%50 = OpPhi %v4int %43 %31 %45 %32
; CHECK: [[extract1:%[a-zA-Z_\d]+]] = OpCompositeExtract %int [[load]] 0
%47 = OpCompositeExtract %int %50 0
; CHECK: [[extract2:%[a-zA-Z_\d]+]] = OpCompositeExtract %int [[load]] 1
%49 = OpCompositeExtract %int %41 1
; CHECK: [[add:%[a-zA-Z_\d]+]] = OpIAdd %int [[extract1]] [[extract2]]
%39 = OpIAdd %int %47 %49
OpStore %o %39
OpReturn
OpFunctionEnd
)";
SinglePassRunAndMatch<opt::SimplificationPass>(text, false);
}
TEST_F(SimplificationTest, ThroughLoops) {
// Testing that folding rules are applied multiple times to instructions
// to be able to propagate across loop iterations.
const std::string text = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %o %i
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 430
OpSourceExtension "GL_GOOGLE_cpp_style_line_directive"
OpSourceExtension "GL_GOOGLE_include_directive"
OpName %main "main"
OpName %o "o"
OpName %i "i"
OpDecorate %o Location 0
OpDecorate %i Flat
OpDecorate %i Location 0
%void = OpTypeVoid
%8 = OpTypeFunction %void
%int = OpTypeInt 32 1
%v4int = OpTypeVector %int 4
%int_0 = OpConstant %int 0
; CHECK: [[constant:%[a-zA-Z_\d]+]] = OpConstantComposite %v4int %int_0 %int_0 %int_0 %int_0
%13 = OpConstantComposite %v4int %int_0 %int_0 %int_0 %int_0
%bool = OpTypeBool
%_ptr_Output_int = OpTypePointer Output %int
%o = OpVariable %_ptr_Output_int Output
%_ptr_Input_v4int = OpTypePointer Input %v4int
%i = OpVariable %_ptr_Input_v4int Input
%68 = OpUndef %v4int
%main = OpFunction %void None %8
%23 = OpLabel
; CHECK: [[load:%[a-zA-Z_\d]+]] = OpLoad %v4int %i
%load = OpLoad %v4int %i
OpBranch %24
%24 = OpLabel
%67 = OpPhi %v4int %load %23 %64 %26
; CHECK: OpLoopMerge [[merge_lab:%[a-zA-Z_\d]+]]
OpLoopMerge %25 %26 None
OpBranch %27
%27 = OpLabel
%48 = OpCompositeExtract %int %67 0
%30 = OpIEqual %bool %48 %int_0
OpBranchConditional %30 %31 %25
%31 = OpLabel
%50 = OpCompositeExtract %int %67 0
%54 = OpCompositeExtract %int %67 1
%58 = OpCompositeExtract %int %67 2
%62 = OpCompositeExtract %int %67 3
%64 = OpCompositeConstruct %v4int %50 %54 %58 %62
OpBranch %26
%26 = OpLabel
OpBranch %24
%25 = OpLabel
; CHECK: [[merge_lab]] = OpLabel
; CHECK: [[extract:%[a-zA-Z_\d]+]] = OpCompositeExtract %int [[load]] 0
%66 = OpCompositeExtract %int %67 0
; CHECK-NEXT: OpStore %o [[extract]]
OpStore %o %66
OpReturn
OpFunctionEnd
)";
SinglePassRunAndMatch<opt::SimplificationPass>(text, false);
}
#endif
} // anonymous namespace