mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-27 05:40:06 +00:00
801 lines
19 KiB
C++
801 lines
19 KiB
C++
// Copyright (c) 2017 Valve Corporation
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// Copyright (c) 2017 LunarG Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "pass_fixture.h"
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#include "pass_utils.h"
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namespace {
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using namespace spvtools;
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using DeadBranchElimTest = PassTest<::testing::Test>;
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TEST_F(DeadBranchElimTest, IfThenElseTrue) {
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// #version 140
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//
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// in vec4 BaseColor;
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//
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// void main()
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// {
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// vec4 v;
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// if (true)
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// v = vec4(0.0,0.0,0.0,0.0);
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// else
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// v = vec4(1.0,1.0,1.0,1.0);
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// gl_FragColor = v;
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// }
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const std::string predefs =
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R"(OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main" %gl_FragColor %BaseColor
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OpExecutionMode %main OriginUpperLeft
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OpSource GLSL 140
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OpName %main "main"
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OpName %v "v"
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OpName %gl_FragColor "gl_FragColor"
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OpName %BaseColor "BaseColor"
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%void = OpTypeVoid
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%7 = OpTypeFunction %void
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%bool = OpTypeBool
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%true = OpConstantTrue %bool
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%float = OpTypeFloat 32
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%v4float = OpTypeVector %float 4
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%float_0 = OpConstant %float 0
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%14 = OpConstantComposite %v4float %float_0 %float_0 %float_0 %float_0
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%float_1 = OpConstant %float 1
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%16 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
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%_ptr_Output_v4float = OpTypePointer Output %v4float
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%gl_FragColor = OpVariable %_ptr_Output_v4float Output
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%_ptr_Input_v4float = OpTypePointer Input %v4float
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%BaseColor = OpVariable %_ptr_Input_v4float Input
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)";
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const std::string before =
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R"(%main = OpFunction %void None %7
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%19 = OpLabel
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%v = OpVariable %_ptr_Function_v4float Function
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OpSelectionMerge %20 None
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OpBranchConditional %true %21 %22
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%21 = OpLabel
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OpStore %v %14
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OpBranch %20
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%22 = OpLabel
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OpStore %v %16
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OpBranch %20
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%20 = OpLabel
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%23 = OpLoad %v4float %v
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OpStore %gl_FragColor %23
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OpReturn
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OpFunctionEnd
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)";
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const std::string after =
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R"(%main = OpFunction %void None %7
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%19 = OpLabel
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%v = OpVariable %_ptr_Function_v4float Function
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OpBranch %21
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%21 = OpLabel
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OpStore %v %14
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OpBranch %20
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%20 = OpLabel
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%23 = OpLoad %v4float %v
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OpStore %gl_FragColor %23
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OpReturn
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OpFunctionEnd
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)";
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SinglePassRunAndCheck<opt::DeadBranchElimPass>(
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predefs + before, predefs + after, true, true);
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}
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TEST_F(DeadBranchElimTest, IfThenElseFalse) {
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// #version 140
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//
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// in vec4 BaseColor;
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//
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// void main()
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// {
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// vec4 v;
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// if (false)
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// v = vec4(0.0,0.0,0.0,0.0);
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// else
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// v = vec4(1.0,1.0,1.0,1.0);
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// gl_FragColor = v;
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// }
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const std::string predefs =
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R"(OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main" %gl_FragColor %BaseColor
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OpExecutionMode %main OriginUpperLeft
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OpSource GLSL 140
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OpName %main "main"
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OpName %v "v"
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OpName %gl_FragColor "gl_FragColor"
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OpName %BaseColor "BaseColor"
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%void = OpTypeVoid
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%7 = OpTypeFunction %void
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%bool = OpTypeBool
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%false = OpConstantFalse %bool
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%float = OpTypeFloat 32
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%v4float = OpTypeVector %float 4
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%float_0 = OpConstant %float 0
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%14 = OpConstantComposite %v4float %float_0 %float_0 %float_0 %float_0
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%float_1 = OpConstant %float 1
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%16 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
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%_ptr_Output_v4float = OpTypePointer Output %v4float
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%gl_FragColor = OpVariable %_ptr_Output_v4float Output
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%_ptr_Input_v4float = OpTypePointer Input %v4float
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%BaseColor = OpVariable %_ptr_Input_v4float Input
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)";
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const std::string before =
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R"(%main = OpFunction %void None %7
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%19 = OpLabel
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%v = OpVariable %_ptr_Function_v4float Function
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OpSelectionMerge %20 None
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OpBranchConditional %false %21 %22
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%21 = OpLabel
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OpStore %v %14
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OpBranch %20
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%22 = OpLabel
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OpStore %v %16
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OpBranch %20
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%20 = OpLabel
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%23 = OpLoad %v4float %v
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OpStore %gl_FragColor %23
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OpReturn
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OpFunctionEnd
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)";
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const std::string after =
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R"(%main = OpFunction %void None %7
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%19 = OpLabel
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%v = OpVariable %_ptr_Function_v4float Function
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OpBranch %22
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%22 = OpLabel
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OpStore %v %16
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OpBranch %20
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%20 = OpLabel
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%23 = OpLoad %v4float %v
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OpStore %gl_FragColor %23
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OpReturn
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OpFunctionEnd
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)";
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SinglePassRunAndCheck<opt::DeadBranchElimPass>(
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predefs + before, predefs + after, true, true);
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}
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TEST_F(DeadBranchElimTest, IfThenTrue) {
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// #version 140
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//
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// in vec4 BaseColor;
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//
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// void main()
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// {
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// vec4 v = BaseColor;
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// if (true)
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// v = v * vec4(0.5,0.5,0.5,0.5);
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// gl_FragColor = v;
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// }
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const std::string predefs =
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R"(OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main" %BaseColor %gl_FragColor
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OpExecutionMode %main OriginUpperLeft
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OpSource GLSL 140
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OpName %main "main"
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OpName %v "v"
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OpName %BaseColor "BaseColor"
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OpName %gl_FragColor "gl_FragColor"
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%void = OpTypeVoid
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%7 = OpTypeFunction %void
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%float = OpTypeFloat 32
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%v4float = OpTypeVector %float 4
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%_ptr_Input_v4float = OpTypePointer Input %v4float
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%BaseColor = OpVariable %_ptr_Input_v4float Input
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%bool = OpTypeBool
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%true = OpConstantTrue %bool
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%float_0_5 = OpConstant %float 0.5
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%15 = OpConstantComposite %v4float %float_0_5 %float_0_5 %float_0_5 %float_0_5
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%_ptr_Output_v4float = OpTypePointer Output %v4float
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%gl_FragColor = OpVariable %_ptr_Output_v4float Output
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)";
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const std::string before =
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R"(%main = OpFunction %void None %7
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%17 = OpLabel
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%v = OpVariable %_ptr_Function_v4float Function
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%18 = OpLoad %v4float %BaseColor
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OpStore %v %18
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OpSelectionMerge %19 None
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OpBranchConditional %true %20 %19
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%20 = OpLabel
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%21 = OpLoad %v4float %v
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%22 = OpFMul %v4float %21 %15
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OpStore %v %22
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OpBranch %19
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%19 = OpLabel
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%23 = OpLoad %v4float %v
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OpStore %gl_FragColor %23
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OpReturn
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OpFunctionEnd
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)";
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const std::string after =
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R"(%main = OpFunction %void None %7
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%17 = OpLabel
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%v = OpVariable %_ptr_Function_v4float Function
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%18 = OpLoad %v4float %BaseColor
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OpStore %v %18
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OpBranch %20
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%20 = OpLabel
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%21 = OpLoad %v4float %v
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%22 = OpFMul %v4float %21 %15
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OpStore %v %22
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OpBranch %19
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%19 = OpLabel
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%23 = OpLoad %v4float %v
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OpStore %gl_FragColor %23
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OpReturn
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OpFunctionEnd
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)";
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SinglePassRunAndCheck<opt::DeadBranchElimPass>(
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predefs + before, predefs + after, true, true);
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}
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TEST_F(DeadBranchElimTest, IfThenFalse) {
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// #version 140
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//
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// in vec4 BaseColor;
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//
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// void main()
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// {
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// vec4 v = BaseColor;
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// if (false)
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// v = v * vec4(0.5,0.5,0.5,0.5);
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// gl_FragColor = v;
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// }
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const std::string predefs =
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R"(OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main" %BaseColor %gl_FragColor
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OpExecutionMode %main OriginUpperLeft
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OpSource GLSL 140
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OpName %main "main"
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OpName %v "v"
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OpName %BaseColor "BaseColor"
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OpName %gl_FragColor "gl_FragColor"
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%void = OpTypeVoid
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%7 = OpTypeFunction %void
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%float = OpTypeFloat 32
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%v4float = OpTypeVector %float 4
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%_ptr_Input_v4float = OpTypePointer Input %v4float
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%BaseColor = OpVariable %_ptr_Input_v4float Input
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%bool = OpTypeBool
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%false = OpConstantFalse %bool
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%float_0_5 = OpConstant %float 0.5
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%15 = OpConstantComposite %v4float %float_0_5 %float_0_5 %float_0_5 %float_0_5
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%_ptr_Output_v4float = OpTypePointer Output %v4float
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%gl_FragColor = OpVariable %_ptr_Output_v4float Output
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)";
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const std::string before =
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R"(%main = OpFunction %void None %7
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%17 = OpLabel
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%v = OpVariable %_ptr_Function_v4float Function
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%18 = OpLoad %v4float %BaseColor
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OpStore %v %18
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OpSelectionMerge %19 None
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OpBranchConditional %false %20 %19
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%20 = OpLabel
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%21 = OpLoad %v4float %v
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%22 = OpFMul %v4float %21 %15
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OpStore %v %22
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OpBranch %19
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%19 = OpLabel
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%23 = OpLoad %v4float %v
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OpStore %gl_FragColor %23
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OpReturn
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OpFunctionEnd
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)";
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const std::string after =
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R"(%main = OpFunction %void None %7
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%17 = OpLabel
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%v = OpVariable %_ptr_Function_v4float Function
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%18 = OpLoad %v4float %BaseColor
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OpStore %v %18
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OpBranch %19
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%19 = OpLabel
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%23 = OpLoad %v4float %v
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OpStore %gl_FragColor %23
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OpReturn
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OpFunctionEnd
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)";
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SinglePassRunAndCheck<opt::DeadBranchElimPass>(
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predefs + before, predefs + after, true, true);
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}
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TEST_F(DeadBranchElimTest, IfThenElsePhiTrue) {
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// Test handling of phi in merge block after dead branch elimination.
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// Note: The SPIR-V has had store/load elimination and phi insertion
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//
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// #version 140
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//
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// void main()
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// {
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// vec4 v;
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// if (true)
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// v = vec4(0.0,0.0,0.0,0.0);
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// else
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// v = vec4(1.0,1.0,1.0,1.0);
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// gl_FragColor = v;
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// }
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const std::string predefs =
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R"(OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main" %gl_FragColor
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OpExecutionMode %main OriginUpperLeft
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OpSource GLSL 140
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OpName %main "main"
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OpName %gl_FragColor "gl_FragColor"
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%void = OpTypeVoid
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%5 = OpTypeFunction %void
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%bool = OpTypeBool
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%true = OpConstantTrue %bool
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%float = OpTypeFloat 32
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%v4float = OpTypeVector %float 4
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%float_0 = OpConstant %float 0
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%12 = OpConstantComposite %v4float %float_0 %float_0 %float_0 %float_0
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%float_1 = OpConstant %float 1
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%14 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
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%_ptr_Output_v4float = OpTypePointer Output %v4float
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%gl_FragColor = OpVariable %_ptr_Output_v4float Output
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%_ptr_Input_v4float = OpTypePointer Input %v4float
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)";
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const std::string before =
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R"(%main = OpFunction %void None %5
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%17 = OpLabel
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OpSelectionMerge %18 None
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OpBranchConditional %true %19 %20
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%19 = OpLabel
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OpBranch %18
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%20 = OpLabel
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OpBranch %18
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%18 = OpLabel
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%21 = OpPhi %v4float %12 %19 %14 %20
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OpStore %gl_FragColor %21
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OpReturn
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OpFunctionEnd
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)";
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const std::string after =
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R"(%main = OpFunction %void None %5
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%17 = OpLabel
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OpBranch %19
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%19 = OpLabel
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OpBranch %18
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%18 = OpLabel
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OpStore %gl_FragColor %12
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OpReturn
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OpFunctionEnd
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)";
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SinglePassRunAndCheck<opt::DeadBranchElimPass>(
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predefs + before, predefs + after, true, true);
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}
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TEST_F(DeadBranchElimTest, IfThenElsePhiFalse) {
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// Test handling of phi in merge block after dead branch elimination.
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// Note: The SPIR-V has had store/load elimination and phi insertion
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//
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// #version 140
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//
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// void main()
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// {
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// vec4 v;
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// if (true)
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// v = vec4(0.0,0.0,0.0,0.0);
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// else
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// v = vec4(1.0,1.0,1.0,1.0);
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// gl_FragColor = v;
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// }
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const std::string predefs =
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R"(OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main" %gl_FragColor
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OpExecutionMode %main OriginUpperLeft
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OpSource GLSL 140
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OpName %main "main"
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OpName %gl_FragColor "gl_FragColor"
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%void = OpTypeVoid
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%5 = OpTypeFunction %void
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%bool = OpTypeBool
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%false = OpConstantFalse %bool
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%float = OpTypeFloat 32
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%v4float = OpTypeVector %float 4
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%float_0 = OpConstant %float 0
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%12 = OpConstantComposite %v4float %float_0 %float_0 %float_0 %float_0
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%float_1 = OpConstant %float 1
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%14 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
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%_ptr_Output_v4float = OpTypePointer Output %v4float
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%gl_FragColor = OpVariable %_ptr_Output_v4float Output
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%_ptr_Input_v4float = OpTypePointer Input %v4float
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)";
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const std::string before =
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R"(%main = OpFunction %void None %5
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%17 = OpLabel
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OpSelectionMerge %18 None
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OpBranchConditional %false %19 %20
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%19 = OpLabel
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OpBranch %18
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%20 = OpLabel
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OpBranch %18
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%18 = OpLabel
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%21 = OpPhi %v4float %12 %19 %14 %20
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OpStore %gl_FragColor %21
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OpReturn
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OpFunctionEnd
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)";
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const std::string after =
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R"(%main = OpFunction %void None %5
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%17 = OpLabel
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OpBranch %20
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%20 = OpLabel
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OpBranch %18
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%18 = OpLabel
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OpStore %gl_FragColor %14
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OpReturn
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OpFunctionEnd
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)";
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SinglePassRunAndCheck<opt::DeadBranchElimPass>(
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predefs + before, predefs + after, true, true);
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}
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TEST_F(DeadBranchElimTest, CompoundIfThenElseFalse) {
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// #version 140
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//
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// layout(std140) uniform U_t
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// {
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// bool g_B ;
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// } ;
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//
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// void main()
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// {
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// vec4 v;
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// if (false) {
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// if (g_B)
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// v = vec4(0.0,0.0,0.0,0.0);
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// else
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// v = vec4(1.0,1.0,1.0,1.0);
|
|
// } else {
|
|
// if (g_B)
|
|
// v = vec4(1.0,1.0,1.0,1.0);
|
|
// else
|
|
// v = vec4(0.0,0.0,0.0,0.0);
|
|
// }
|
|
// gl_FragColor = v;
|
|
// }
|
|
|
|
const std::string predefs =
|
|
R"(OpCapability Shader
|
|
%1 = OpExtInstImport "GLSL.std.450"
|
|
OpMemoryModel Logical GLSL450
|
|
OpEntryPoint Fragment %main "main" %gl_FragColor
|
|
OpExecutionMode %main OriginUpperLeft
|
|
OpSource GLSL 140
|
|
OpName %main "main"
|
|
OpName %U_t "U_t"
|
|
OpMemberName %U_t 0 "g_B"
|
|
OpName %_ ""
|
|
OpName %v "v"
|
|
OpName %gl_FragColor "gl_FragColor"
|
|
OpMemberDecorate %U_t 0 Offset 0
|
|
OpDecorate %U_t Block
|
|
OpDecorate %_ DescriptorSet 0
|
|
%void = OpTypeVoid
|
|
%8 = OpTypeFunction %void
|
|
%bool = OpTypeBool
|
|
%false = OpConstantFalse %bool
|
|
%uint = OpTypeInt 32 0
|
|
%U_t = OpTypeStruct %uint
|
|
%_ptr_Uniform_U_t = OpTypePointer Uniform %U_t
|
|
%_ = OpVariable %_ptr_Uniform_U_t Uniform
|
|
%int = OpTypeInt 32 1
|
|
%int_0 = OpConstant %int 0
|
|
%_ptr_Uniform_uint = OpTypePointer Uniform %uint
|
|
%uint_0 = OpConstant %uint 0
|
|
%float = OpTypeFloat 32
|
|
%v4float = OpTypeVector %float 4
|
|
%_ptr_Function_v4float = OpTypePointer Function %v4float
|
|
%float_0 = OpConstant %float 0
|
|
%21 = OpConstantComposite %v4float %float_0 %float_0 %float_0 %float_0
|
|
%float_1 = OpConstant %float 1
|
|
%23 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
|
|
%_ptr_Output_v4float = OpTypePointer Output %v4float
|
|
%gl_FragColor = OpVariable %_ptr_Output_v4float Output
|
|
)";
|
|
|
|
const std::string before =
|
|
R"(%main = OpFunction %void None %8
|
|
%25 = OpLabel
|
|
%v = OpVariable %_ptr_Function_v4float Function
|
|
OpSelectionMerge %26 None
|
|
OpBranchConditional %false %27 %28
|
|
%27 = OpLabel
|
|
%29 = OpAccessChain %_ptr_Uniform_uint %_ %int_0
|
|
%30 = OpLoad %uint %29
|
|
%31 = OpINotEqual %bool %30 %uint_0
|
|
OpSelectionMerge %32 None
|
|
OpBranchConditional %31 %33 %34
|
|
%33 = OpLabel
|
|
OpStore %v %21
|
|
OpBranch %32
|
|
%34 = OpLabel
|
|
OpStore %v %23
|
|
OpBranch %32
|
|
%32 = OpLabel
|
|
OpBranch %26
|
|
%28 = OpLabel
|
|
%35 = OpAccessChain %_ptr_Uniform_uint %_ %int_0
|
|
%36 = OpLoad %uint %35
|
|
%37 = OpINotEqual %bool %36 %uint_0
|
|
OpSelectionMerge %38 None
|
|
OpBranchConditional %37 %39 %40
|
|
%39 = OpLabel
|
|
OpStore %v %23
|
|
OpBranch %38
|
|
%40 = OpLabel
|
|
OpStore %v %21
|
|
OpBranch %38
|
|
%38 = OpLabel
|
|
OpBranch %26
|
|
%26 = OpLabel
|
|
%41 = OpLoad %v4float %v
|
|
OpStore %gl_FragColor %41
|
|
OpReturn
|
|
OpFunctionEnd
|
|
)";
|
|
|
|
const std::string after =
|
|
R"(%main = OpFunction %void None %8
|
|
%25 = OpLabel
|
|
%v = OpVariable %_ptr_Function_v4float Function
|
|
OpBranch %28
|
|
%28 = OpLabel
|
|
%35 = OpAccessChain %_ptr_Uniform_uint %_ %int_0
|
|
%36 = OpLoad %uint %35
|
|
%37 = OpINotEqual %bool %36 %uint_0
|
|
OpSelectionMerge %38 None
|
|
OpBranchConditional %37 %39 %40
|
|
%39 = OpLabel
|
|
OpStore %v %23
|
|
OpBranch %38
|
|
%40 = OpLabel
|
|
OpStore %v %21
|
|
OpBranch %38
|
|
%38 = OpLabel
|
|
OpBranch %26
|
|
%26 = OpLabel
|
|
%41 = OpLoad %v4float %v
|
|
OpStore %gl_FragColor %41
|
|
OpReturn
|
|
OpFunctionEnd
|
|
)";
|
|
|
|
SinglePassRunAndCheck<opt::DeadBranchElimPass>(
|
|
predefs + before, predefs + after, true, true);
|
|
}
|
|
|
|
TEST_F(DeadBranchElimTest, NoOrphanMerge) {
|
|
|
|
const std::string predefs =
|
|
R"(OpCapability Shader
|
|
%1 = OpExtInstImport "GLSL.std.450"
|
|
OpMemoryModel Logical GLSL450
|
|
OpEntryPoint Fragment %main "main" %BaseColor %gl_FragColor
|
|
OpExecutionMode %main OriginUpperLeft
|
|
OpSource GLSL 140
|
|
OpName %main "main"
|
|
OpName %v "v"
|
|
OpName %BaseColor "BaseColor"
|
|
OpName %gl_FragColor "gl_FragColor"
|
|
%void = OpTypeVoid
|
|
%7 = OpTypeFunction %void
|
|
%float = OpTypeFloat 32
|
|
%v4float = OpTypeVector %float 4
|
|
%_ptr_Function_v4float = OpTypePointer Function %v4float
|
|
%_ptr_Input_v4float = OpTypePointer Input %v4float
|
|
%BaseColor = OpVariable %_ptr_Input_v4float Input
|
|
%bool = OpTypeBool
|
|
%true = OpConstantTrue %bool
|
|
%float_0_5 = OpConstant %float 0.5
|
|
%_ptr_Output_v4float = OpTypePointer Output %v4float
|
|
%gl_FragColor = OpVariable %_ptr_Output_v4float Output
|
|
)";
|
|
|
|
const std::string before =
|
|
R"(%main = OpFunction %void None %7
|
|
%16 = OpLabel
|
|
%v = OpVariable %_ptr_Function_v4float Function
|
|
%17 = OpLoad %v4float %BaseColor
|
|
OpStore %v %17
|
|
OpSelectionMerge %18 None
|
|
OpBranchConditional %true %19 %20
|
|
%19 = OpLabel
|
|
OpKill
|
|
%20 = OpLabel
|
|
%21 = OpLoad %v4float %v
|
|
%22 = OpVectorTimesScalar %v4float %21 %float_0_5
|
|
OpStore %v %22
|
|
OpBranch %18
|
|
%18 = OpLabel
|
|
%23 = OpLoad %v4float %v
|
|
OpStore %gl_FragColor %23
|
|
OpReturn
|
|
OpFunctionEnd
|
|
)";
|
|
|
|
const std::string after =
|
|
R"(%main = OpFunction %void None %7
|
|
%16 = OpLabel
|
|
%v = OpVariable %_ptr_Function_v4float Function
|
|
%17 = OpLoad %v4float %BaseColor
|
|
OpStore %v %17
|
|
OpSelectionMerge %18 None
|
|
OpBranchConditional %true %19 %18
|
|
%19 = OpLabel
|
|
OpKill
|
|
%18 = OpLabel
|
|
%23 = OpLoad %v4float %v
|
|
OpStore %gl_FragColor %23
|
|
OpReturn
|
|
OpFunctionEnd
|
|
)";
|
|
|
|
SinglePassRunAndCheck<opt::DeadBranchElimPass>(
|
|
predefs + before, predefs + after, true, true);
|
|
}
|
|
|
|
TEST_F(DeadBranchElimTest, KeepContinueTargetWhenKillAfterMerge) {
|
|
// #version 450
|
|
// void main() {
|
|
// bool c;
|
|
// bool d;
|
|
// while(c) {
|
|
// if(d) {
|
|
// continue;
|
|
// }
|
|
// if(false) {
|
|
// continue;
|
|
// }
|
|
// discard;
|
|
// }
|
|
// }
|
|
|
|
const std::string predefs =
|
|
R"(OpCapability Shader
|
|
%1 = OpExtInstImport "GLSL.std.450"
|
|
OpMemoryModel Logical GLSL450
|
|
OpEntryPoint Fragment %main "main"
|
|
OpExecutionMode %main OriginUpperLeft
|
|
OpSource GLSL 450
|
|
OpName %main "main"
|
|
OpName %c "c"
|
|
OpName %d "d"
|
|
%void = OpTypeVoid
|
|
%6 = OpTypeFunction %void
|
|
%bool = OpTypeBool
|
|
%_ptr_Function_bool = OpTypePointer Function %bool
|
|
%false = OpConstantFalse %bool
|
|
)";
|
|
|
|
const std::string before =
|
|
R"(%main = OpFunction %void None %6
|
|
%10 = OpLabel
|
|
%c = OpVariable %_ptr_Function_bool Function
|
|
%d = OpVariable %_ptr_Function_bool Function
|
|
OpBranch %11
|
|
%11 = OpLabel
|
|
OpLoopMerge %12 %13 None
|
|
OpBranch %14
|
|
%14 = OpLabel
|
|
%15 = OpLoad %bool %c
|
|
OpBranchConditional %15 %16 %12
|
|
%16 = OpLabel
|
|
%17 = OpLoad %bool %d
|
|
OpSelectionMerge %18 None
|
|
OpBranchConditional %17 %19 %18
|
|
%19 = OpLabel
|
|
OpBranch %13
|
|
%18 = OpLabel
|
|
OpSelectionMerge %20 None
|
|
OpBranchConditional %false %21 %20
|
|
%21 = OpLabel
|
|
OpBranch %13
|
|
%20 = OpLabel
|
|
OpKill
|
|
%13 = OpLabel
|
|
OpBranch %11
|
|
%12 = OpLabel
|
|
OpReturn
|
|
OpFunctionEnd
|
|
)";
|
|
|
|
const std::string after =
|
|
R"(%main = OpFunction %void None %6
|
|
%10 = OpLabel
|
|
%c = OpVariable %_ptr_Function_bool Function
|
|
%d = OpVariable %_ptr_Function_bool Function
|
|
OpBranch %11
|
|
%11 = OpLabel
|
|
OpLoopMerge %12 %13 None
|
|
OpBranch %14
|
|
%14 = OpLabel
|
|
%15 = OpLoad %bool %c
|
|
OpBranchConditional %15 %16 %12
|
|
%16 = OpLabel
|
|
%17 = OpLoad %bool %d
|
|
OpSelectionMerge %18 None
|
|
OpBranchConditional %17 %19 %18
|
|
%19 = OpLabel
|
|
OpBranch %13
|
|
%18 = OpLabel
|
|
OpBranch %20
|
|
%20 = OpLabel
|
|
OpKill
|
|
%13 = OpLabel
|
|
OpBranch %11
|
|
%12 = OpLabel
|
|
OpReturn
|
|
OpFunctionEnd
|
|
)";
|
|
|
|
SinglePassRunAndCheck<opt::DeadBranchElimPass>(
|
|
predefs + before, predefs + after, true, true);
|
|
}
|
|
|
|
// TODO(greg-lunarg): Add tests to verify handling of these cases:
|
|
//
|
|
// More complex control flow
|
|
// Others?
|
|
|
|
} // anonymous namespace
|