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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 <string>
#include "test/opt/pass_fixture.h"
#include "test/opt/pass_utils.h"
namespace spvtools {
namespace opt {
namespace {
using VectorDCETest = PassTest<::testing::Test>;
TEST_F(VectorDCETest, InsertAfterInsertElim) {
// With two insertions to the same offset, the first is dead.
//
// Note: The SPIR-V assembly has had store/load elimination
// performed to allow the inserts and extracts to directly
// reference each other.
//
// #version 450
//
// layout (location=0) in float In0;
// layout (location=1) in float In1;
// layout (location=2) in vec2 In2;
// layout (location=0) out vec4 OutColor;
//
// void main()
// {
// vec2 v = In2;
// v.x = In0 + In1; // dead
// v.x = 0.0;
// OutColor = v.xyxy;
// }
const std::string before_predefs =
R"(OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In2 %In0 %In1 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpName %main "main"
OpName %In2 "In2"
OpName %In0 "In0"
OpName %In1 "In1"
OpName %OutColor "OutColor"
OpName %_Globals_ "_Globals_"
OpMemberName %_Globals_ 0 "g_b"
OpMemberName %_Globals_ 1 "g_n"
OpName %_ ""
OpDecorate %In2 Location 2
OpDecorate %In0 Location 0
OpDecorate %In1 Location 1
OpDecorate %OutColor Location 0
OpMemberDecorate %_Globals_ 0 Offset 0
OpMemberDecorate %_Globals_ 1 Offset 4
OpDecorate %_Globals_ Block
OpDecorate %_ DescriptorSet 0
OpDecorate %_ Binding 0
%void = OpTypeVoid
%11 = OpTypeFunction %void
%float = OpTypeFloat 32
%v2float = OpTypeVector %float 2
%_ptr_Function_v2float = OpTypePointer Function %v2float
%_ptr_Input_v2float = OpTypePointer Input %v2float
%In2 = OpVariable %_ptr_Input_v2float Input
%_ptr_Input_float = OpTypePointer Input %float
%In0 = OpVariable %_ptr_Input_float Input
%In1 = OpVariable %_ptr_Input_float Input
%uint = OpTypeInt 32 0
%_ptr_Function_float = OpTypePointer Function %float
%float_0 = OpConstant %float 0
%v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%int = OpTypeInt 32 1
%_Globals_ = OpTypeStruct %uint %int
%_ptr_Uniform__Globals_ = OpTypePointer Uniform %_Globals_
%_ = OpVariable %_ptr_Uniform__Globals_ Uniform
)";
const std::string after_predefs =
R"(OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In2 %In0 %In1 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpName %main "main"
OpName %In2 "In2"
OpName %In0 "In0"
OpName %In1 "In1"
OpName %OutColor "OutColor"
OpName %_Globals_ "_Globals_"
OpMemberName %_Globals_ 0 "g_b"
OpMemberName %_Globals_ 1 "g_n"
OpName %_ ""
OpDecorate %In2 Location 2
OpDecorate %In0 Location 0
OpDecorate %In1 Location 1
OpDecorate %OutColor Location 0
OpMemberDecorate %_Globals_ 0 Offset 0
OpMemberDecorate %_Globals_ 1 Offset 4
OpDecorate %_Globals_ Block
OpDecorate %_ DescriptorSet 0
OpDecorate %_ Binding 0
%void = OpTypeVoid
%10 = OpTypeFunction %void
%float = OpTypeFloat 32
%v2float = OpTypeVector %float 2
%_ptr_Function_v2float = OpTypePointer Function %v2float
%_ptr_Input_v2float = OpTypePointer Input %v2float
%In2 = OpVariable %_ptr_Input_v2float Input
%_ptr_Input_float = OpTypePointer Input %float
%In0 = OpVariable %_ptr_Input_float Input
%In1 = OpVariable %_ptr_Input_float Input
%uint = OpTypeInt 32 0
%_ptr_Function_float = OpTypePointer Function %float
%float_0 = OpConstant %float 0
%v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%int = OpTypeInt 32 1
%_Globals_ = OpTypeStruct %uint %int
%_ptr_Uniform__Globals_ = OpTypePointer Uniform %_Globals_
%_ = OpVariable %_ptr_Uniform__Globals_ Uniform
)";
const std::string before =
R"(%main = OpFunction %void None %11
%25 = OpLabel
%26 = OpLoad %v2float %In2
%27 = OpLoad %float %In0
%28 = OpLoad %float %In1
%29 = OpFAdd %float %27 %28
%35 = OpCompositeInsert %v2float %29 %26 0
%37 = OpCompositeInsert %v2float %float_0 %35 0
%33 = OpVectorShuffle %v4float %37 %37 0 1 0 1
OpStore %OutColor %33
OpReturn
OpFunctionEnd
)";
const std::string after =
R"(%main = OpFunction %void None %10
%23 = OpLabel
%24 = OpLoad %v2float %In2
%25 = OpLoad %float %In0
%26 = OpLoad %float %In1
%27 = OpFAdd %float %25 %26
%28 = OpCompositeInsert %v2float %27 %24 0
%29 = OpCompositeInsert %v2float %float_0 %24 0
%30 = OpVectorShuffle %v4float %29 %29 0 1 0 1
OpStore %OutColor %30
OpReturn
OpFunctionEnd
)";
SinglePassRunAndCheck<VectorDCE>(before_predefs + before,
after_predefs + after, true, true);
}
TEST_F(VectorDCETest, DeadInsertInChainWithPhi) {
// Dead insert eliminated with phi in insertion chain.
//
// Note: The SPIR-V assembly has had store/load elimination
// performed to allow the inserts and extracts to directly
// reference each other.
//
// #version 450
//
// layout (location=0) in vec4 In0;
// layout (location=1) in float In1;
// layout (location=2) in float In2;
// layout (location=0) out vec4 OutColor;
//
// layout(std140, binding = 0 ) uniform _Globals_
// {
// bool g_b;
// };
//
// void main()
// {
// vec4 v = In0;
// v.z = In1 + In2;
// if (g_b) v.w = 1.0;
// OutColor = vec4(v.x,v.y,0.0,v.w);
// }
const std::string before_predefs =
R"(OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In0 %In1 %In2 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpName %main "main"
OpName %In0 "In0"
OpName %In1 "In1"
OpName %In2 "In2"
OpName %_Globals_ "_Globals_"
OpMemberName %_Globals_ 0 "g_b"
OpName %_ ""
OpName %OutColor "OutColor"
OpDecorate %In0 Location 0
OpDecorate %In1 Location 1
OpDecorate %In2 Location 2
OpMemberDecorate %_Globals_ 0 Offset 0
OpDecorate %_Globals_ Block
OpDecorate %_ DescriptorSet 0
OpDecorate %_ Binding 0
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%11 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Function_v4float = OpTypePointer Function %v4float
%_ptr_Input_v4float = OpTypePointer Input %v4float
%In0 = OpVariable %_ptr_Input_v4float Input
%_ptr_Input_float = OpTypePointer Input %float
%In1 = OpVariable %_ptr_Input_float Input
%In2 = OpVariable %_ptr_Input_float Input
%uint = OpTypeInt 32 0
%_ptr_Function_float = OpTypePointer Function %float
%_Globals_ = OpTypeStruct %uint
%_ptr_Uniform__Globals_ = OpTypePointer Uniform %_Globals_
%_ = OpVariable %_ptr_Uniform__Globals_ Uniform
%int = OpTypeInt 32 1
%int_0 = OpConstant %int 0
%_ptr_Uniform_uint = OpTypePointer Uniform %uint
%bool = OpTypeBool
%uint_0 = OpConstant %uint 0
%float_1 = OpConstant %float 1
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%float_0 = OpConstant %float 0
)";
const std::string after_predefs =
R"(OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In0 %In1 %In2 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpName %main "main"
OpName %In0 "In0"
OpName %In1 "In1"
OpName %In2 "In2"
OpName %_Globals_ "_Globals_"
OpMemberName %_Globals_ 0 "g_b"
OpName %_ ""
OpName %OutColor "OutColor"
OpDecorate %In0 Location 0
OpDecorate %In1 Location 1
OpDecorate %In2 Location 2
OpMemberDecorate %_Globals_ 0 Offset 0
OpDecorate %_Globals_ Block
OpDecorate %_ DescriptorSet 0
OpDecorate %_ Binding 0
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%10 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Function_v4float = OpTypePointer Function %v4float
%_ptr_Input_v4float = OpTypePointer Input %v4float
%In0 = OpVariable %_ptr_Input_v4float Input
%_ptr_Input_float = OpTypePointer Input %float
%In1 = OpVariable %_ptr_Input_float Input
%In2 = OpVariable %_ptr_Input_float Input
%uint = OpTypeInt 32 0
%_ptr_Function_float = OpTypePointer Function %float
%_Globals_ = OpTypeStruct %uint
%_ptr_Uniform__Globals_ = OpTypePointer Uniform %_Globals_
%_ = OpVariable %_ptr_Uniform__Globals_ Uniform
%int = OpTypeInt 32 1
%int_0 = OpConstant %int 0
%_ptr_Uniform_uint = OpTypePointer Uniform %uint
%bool = OpTypeBool
%uint_0 = OpConstant %uint 0
%float_1 = OpConstant %float 1
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%float_0 = OpConstant %float 0
)";
const std::string before =
R"(%main = OpFunction %void None %11
%31 = OpLabel
%32 = OpLoad %v4float %In0
%33 = OpLoad %float %In1
%34 = OpLoad %float %In2
%35 = OpFAdd %float %33 %34
%51 = OpCompositeInsert %v4float %35 %32 2
%37 = OpAccessChain %_ptr_Uniform_uint %_ %int_0
%38 = OpLoad %uint %37
%39 = OpINotEqual %bool %38 %uint_0
OpSelectionMerge %40 None
OpBranchConditional %39 %41 %40
%41 = OpLabel
%53 = OpCompositeInsert %v4float %float_1 %51 3
OpBranch %40
%40 = OpLabel
%60 = OpPhi %v4float %51 %31 %53 %41
%55 = OpCompositeExtract %float %60 0
%57 = OpCompositeExtract %float %60 1
%59 = OpCompositeExtract %float %60 3
%49 = OpCompositeConstruct %v4float %55 %57 %float_0 %59
OpStore %OutColor %49
OpReturn
OpFunctionEnd
)";
const std::string after =
R"(%main = OpFunction %void None %10
%27 = OpLabel
%28 = OpLoad %v4float %In0
%29 = OpLoad %float %In1
%30 = OpLoad %float %In2
%31 = OpFAdd %float %29 %30
%32 = OpCompositeInsert %v4float %31 %28 2
%33 = OpAccessChain %_ptr_Uniform_uint %_ %int_0
%34 = OpLoad %uint %33
%35 = OpINotEqual %bool %34 %uint_0
OpSelectionMerge %36 None
OpBranchConditional %35 %37 %36
%37 = OpLabel
%38 = OpCompositeInsert %v4float %float_1 %28 3
OpBranch %36
%36 = OpLabel
%39 = OpPhi %v4float %28 %27 %38 %37
%40 = OpCompositeExtract %float %39 0
%41 = OpCompositeExtract %float %39 1
%42 = OpCompositeExtract %float %39 3
%43 = OpCompositeConstruct %v4float %40 %41 %float_0 %42
OpStore %OutColor %43
OpReturn
OpFunctionEnd
)";
SinglePassRunAndCheck<VectorDCE>(before_predefs + before,
after_predefs + after, true, true);
}
TEST_F(VectorDCETest, DeadInsertWithScalars) {
// Dead insert which requires two passes to eliminate
//
// Note: The SPIR-V assembly has had store/load elimination
// performed to allow the inserts and extracts to directly
// reference each other.
//
// #version 450
//
// layout (location=0) in vec4 In0;
// layout (location=1) in float In1;
// layout (location=2) in float In2;
// layout (location=0) out vec4 OutColor;
//
// layout(std140, binding = 0 ) uniform _Globals_
// {
// bool g_b;
// bool g_b2;
// };
//
// void main()
// {
// vec4 v1, v2;
// v1 = In0;
// v1.y = In1 + In2; // dead, second pass
// if (g_b) v1.x = 1.0;
// v2.x = v1.x;
// v2.y = v1.y; // dead, first pass
// if (g_b2) v2.x = 0.0;
// OutColor = vec4(v2.x,v2.x,0.0,1.0);
// }
const std::string before_predefs =
R"(OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In0 %In1 %In2 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpName %main "main"
OpName %In0 "In0"
OpName %In1 "In1"
OpName %In2 "In2"
OpName %_Globals_ "_Globals_"
OpMemberName %_Globals_ 0 "g_b"
OpMemberName %_Globals_ 1 "g_b2"
OpName %_ ""
OpName %OutColor "OutColor"
OpDecorate %In0 Location 0
OpDecorate %In1 Location 1
OpDecorate %In2 Location 2
OpMemberDecorate %_Globals_ 0 Offset 0
OpMemberDecorate %_Globals_ 1 Offset 4
OpDecorate %_Globals_ Block
OpDecorate %_ DescriptorSet 0
OpDecorate %_ Binding 0
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%10 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Function_v4float = OpTypePointer Function %v4float
%_ptr_Input_v4float = OpTypePointer Input %v4float
%In0 = OpVariable %_ptr_Input_v4float Input
%_ptr_Input_float = OpTypePointer Input %float
%In1 = OpVariable %_ptr_Input_float Input
%In2 = OpVariable %_ptr_Input_float Input
%uint = OpTypeInt 32 0
%_Globals_ = OpTypeStruct %uint %uint
%_ptr_Uniform__Globals_ = OpTypePointer Uniform %_Globals_
%_ = OpVariable %_ptr_Uniform__Globals_ Uniform
%int = OpTypeInt 32 1
%int_0 = OpConstant %int 0
%_ptr_Uniform_uint = OpTypePointer Uniform %uint
%bool = OpTypeBool
%uint_0 = OpConstant %uint 0
%float_1 = OpConstant %float 1
%int_1 = OpConstant %int 1
%float_0 = OpConstant %float 0
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%27 = OpUndef %v4float
)";
const std::string after_predefs =
R"(OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In0 %In1 %In2 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpName %main "main"
OpName %In0 "In0"
OpName %In1 "In1"
OpName %In2 "In2"
OpName %_Globals_ "_Globals_"
OpMemberName %_Globals_ 0 "g_b"
OpMemberName %_Globals_ 1 "g_b2"
OpName %_ ""
OpName %OutColor "OutColor"
OpDecorate %In0 Location 0
OpDecorate %In1 Location 1
OpDecorate %In2 Location 2
OpMemberDecorate %_Globals_ 0 Offset 0
OpMemberDecorate %_Globals_ 1 Offset 4
OpDecorate %_Globals_ Block
OpDecorate %_ DescriptorSet 0
OpDecorate %_ Binding 0
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%10 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Function_v4float = OpTypePointer Function %v4float
%_ptr_Input_v4float = OpTypePointer Input %v4float
%In0 = OpVariable %_ptr_Input_v4float Input
%_ptr_Input_float = OpTypePointer Input %float
%In1 = OpVariable %_ptr_Input_float Input
%In2 = OpVariable %_ptr_Input_float Input
%uint = OpTypeInt 32 0
%_Globals_ = OpTypeStruct %uint %uint
%_ptr_Uniform__Globals_ = OpTypePointer Uniform %_Globals_
%_ = OpVariable %_ptr_Uniform__Globals_ Uniform
%int = OpTypeInt 32 1
%int_0 = OpConstant %int 0
%_ptr_Uniform_uint = OpTypePointer Uniform %uint
%bool = OpTypeBool
%uint_0 = OpConstant %uint 0
%float_1 = OpConstant %float 1
%int_1 = OpConstant %int 1
%float_0 = OpConstant %float 0
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%27 = OpUndef %v4float
%55 = OpUndef %v4float
)";
const std::string before =
R"(%main = OpFunction %void None %10
%28 = OpLabel
%29 = OpLoad %v4float %In0
%30 = OpLoad %float %In1
%31 = OpLoad %float %In2
%32 = OpFAdd %float %30 %31
%33 = OpCompositeInsert %v4float %32 %29 1
%34 = OpAccessChain %_ptr_Uniform_uint %_ %int_0
%35 = OpLoad %uint %34
%36 = OpINotEqual %bool %35 %uint_0
OpSelectionMerge %37 None
OpBranchConditional %36 %38 %37
%38 = OpLabel
%39 = OpCompositeInsert %v4float %float_1 %33 0
OpBranch %37
%37 = OpLabel
%40 = OpPhi %v4float %33 %28 %39 %38
%41 = OpCompositeExtract %float %40 0
%42 = OpCompositeInsert %v4float %41 %27 0
%43 = OpCompositeExtract %float %40 1
%44 = OpCompositeInsert %v4float %43 %42 1
%45 = OpAccessChain %_ptr_Uniform_uint %_ %int_1
%46 = OpLoad %uint %45
%47 = OpINotEqual %bool %46 %uint_0
OpSelectionMerge %48 None
OpBranchConditional %47 %49 %48
%49 = OpLabel
%50 = OpCompositeInsert %v4float %float_0 %44 0
OpBranch %48
%48 = OpLabel
%51 = OpPhi %v4float %44 %37 %50 %49
%52 = OpCompositeExtract %float %51 0
%53 = OpCompositeExtract %float %51 0
%54 = OpCompositeConstruct %v4float %52 %53 %float_0 %float_1
OpStore %OutColor %54
OpReturn
OpFunctionEnd
)";
const std::string after =
R"(%main = OpFunction %void None %10
%28 = OpLabel
%29 = OpLoad %v4float %In0
%30 = OpLoad %float %In1
%31 = OpLoad %float %In2
%32 = OpFAdd %float %30 %31
%33 = OpCompositeInsert %v4float %32 %29 1
%34 = OpAccessChain %_ptr_Uniform_uint %_ %int_0
%35 = OpLoad %uint %34
%36 = OpINotEqual %bool %35 %uint_0
OpSelectionMerge %37 None
OpBranchConditional %36 %38 %37
%38 = OpLabel
%39 = OpCompositeInsert %v4float %float_1 %55 0
OpBranch %37
%37 = OpLabel
%40 = OpPhi %v4float %29 %28 %39 %38
%41 = OpCompositeExtract %float %40 0
%42 = OpCompositeInsert %v4float %41 %55 0
%43 = OpCompositeExtract %float %40 1
%44 = OpCompositeInsert %v4float %43 %42 1
%45 = OpAccessChain %_ptr_Uniform_uint %_ %int_1
%46 = OpLoad %uint %45
%47 = OpINotEqual %bool %46 %uint_0
OpSelectionMerge %48 None
OpBranchConditional %47 %49 %48
%49 = OpLabel
%50 = OpCompositeInsert %v4float %float_0 %55 0
OpBranch %48
%48 = OpLabel
%51 = OpPhi %v4float %42 %37 %50 %49
%52 = OpCompositeExtract %float %51 0
%53 = OpCompositeExtract %float %51 0
%54 = OpCompositeConstruct %v4float %52 %53 %float_0 %float_1
OpStore %OutColor %54
OpReturn
OpFunctionEnd
)";
SinglePassRunAndCheck<VectorDCE>(before_predefs + before,
after_predefs + after, true, true);
}
TEST_F(VectorDCETest, InsertObjectLive) {
// Make sure that the object being inserted in an OpCompositeInsert
// is not removed when it is uses later on.
const std::string before =
R"(OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In0 %In1 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpName %main "main"
OpName %In0 "In0"
OpName %In1 "In1"
OpName %OutColor "OutColor"
OpDecorate %In0 Location 0
OpDecorate %In1 Location 1
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%10 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Input_v4float = OpTypePointer Input %v4float
%In0 = OpVariable %_ptr_Input_v4float Input
%_ptr_Input_float = OpTypePointer Input %float
%In1 = OpVariable %_ptr_Input_float Input
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%main = OpFunction %void None %10
%28 = OpLabel
%29 = OpLoad %v4float %In0
%30 = OpLoad %float %In1
%33 = OpCompositeInsert %v4float %30 %29 1
OpStore %OutColor %33
OpReturn
OpFunctionEnd
)";
SetAssembleOptions(SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
SinglePassRunAndCheck<VectorDCE>(before, before, true, true);
}
TEST_F(VectorDCETest, DeadInsertInCycle) {
// Dead insert in chain with cycle. Demonstrates analysis can handle
// cycles in chains going through scalars intermediate values.
//
// Note: The SPIR-V assembly has had store/load elimination
// performed to allow the inserts and extracts to directly
// reference each other.
//
// #version 450
//
// layout (location=0) in vec4 In0;
// layout (location=1) in float In1;
// layout (location=2) in float In2;
// layout (location=0) out vec4 OutColor;
//
// layout(std140, binding = 0 ) uniform _Globals_
// {
// int g_n ;
// };
//
// void main()
// {
// vec2 v = vec2(0.0, 1.0);
// for (int i = 0; i < g_n; i++) {
// v.x = v.x + 1;
// v.y = v.y * 0.9; // dead
// }
// OutColor = vec4(v.x);
// }
const std::string assembly =
R"(
; CHECK: [[init_val:%\w+]] = OpConstantComposite %v2float %float_0 %float_1
; CHECK: [[undef:%\w+]] = OpUndef %v2float
; CHECK: OpFunction
; CHECK: [[entry_lab:%\w+]] = OpLabel
; CHECK: [[loop_header:%\w+]] = OpLabel
; CHECK: OpPhi %v2float [[init_val]] [[entry_lab]] [[x_insert:%\w+]] {{%\w+}}
; CHECK: [[x_insert:%\w+]] = OpCompositeInsert %v2float %43 [[undef]] 0
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %OutColor %In0 %In1 %In2
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpName %main "main"
OpName %_Globals_ "_Globals_"
OpMemberName %_Globals_ 0 "g_n"
OpName %_ ""
OpName %OutColor "OutColor"
OpName %In0 "In0"
OpName %In1 "In1"
OpName %In2 "In2"
OpMemberDecorate %_Globals_ 0 Offset 0
OpDecorate %_Globals_ Block
OpDecorate %_ DescriptorSet 0
OpDecorate %_ Binding 0
OpDecorate %OutColor Location 0
OpDecorate %In0 Location 0
OpDecorate %In1 Location 1
OpDecorate %In2 Location 2
%void = OpTypeVoid
%10 = OpTypeFunction %void
%float = OpTypeFloat 32
%v2float = OpTypeVector %float 2
%_ptr_Function_v2float = OpTypePointer Function %v2float
%float_0 = OpConstant %float 0
%float_1 = OpConstant %float 1
%16 = OpConstantComposite %v2float %float_0 %float_1
%int = OpTypeInt 32 1
%_ptr_Function_int = OpTypePointer Function %int
%int_0 = OpConstant %int 0
%_Globals_ = OpTypeStruct %int
%_ptr_Uniform__Globals_ = OpTypePointer Uniform %_Globals_
%_ = OpVariable %_ptr_Uniform__Globals_ Uniform
%_ptr_Uniform_int = OpTypePointer Uniform %int
%bool = OpTypeBool
%float_0_75 = OpConstant %float 0.75
%int_1 = OpConstant %int 1
%v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%_ptr_Input_v4float = OpTypePointer Input %v4float
%In0 = OpVariable %_ptr_Input_v4float Input
%_ptr_Input_float = OpTypePointer Input %float
%In1 = OpVariable %_ptr_Input_float Input
%In2 = OpVariable %_ptr_Input_float Input
%main = OpFunction %void None %10
%29 = OpLabel
OpBranch %30
%30 = OpLabel
%31 = OpPhi %v2float %16 %29 %32 %33
%34 = OpPhi %int %int_0 %29 %35 %33
OpLoopMerge %36 %33 None
OpBranch %37
%37 = OpLabel
%38 = OpAccessChain %_ptr_Uniform_int %_ %int_0
%39 = OpLoad %int %38
%40 = OpSLessThan %bool %34 %39
OpBranchConditional %40 %41 %36
%41 = OpLabel
%42 = OpCompositeExtract %float %31 0
%43 = OpFAdd %float %42 %float_1
%44 = OpCompositeInsert %v2float %43 %31 0
%45 = OpCompositeExtract %float %44 1
%46 = OpFMul %float %45 %float_0_75
%32 = OpCompositeInsert %v2float %46 %44 1
OpBranch %33
%33 = OpLabel
%35 = OpIAdd %int %34 %int_1
OpBranch %30
%36 = OpLabel
%47 = OpCompositeExtract %float %31 0
%48 = OpCompositeConstruct %v4float %47 %47 %47 %47
OpStore %OutColor %48
OpReturn
OpFunctionEnd
)";
SinglePassRunAndMatch<VectorDCE>(assembly, true);
}
TEST_F(VectorDCETest, DeadLoadFeedingCompositeConstruct) {
// Detach the loads feeding the CompositeConstruct for the unused elements.
// TODO: Implement the rewrite for CompositeConstruct.
const std::string assembly =
R"(
; CHECK: [[undef:%\w+]] = OpUndef %float
; CHECK: [[ac:%\w+]] = OpAccessChain %_ptr_Input_float %In0 %uint_2
; CHECK: [[load:%\w+]] = OpLoad %float [[ac]]
; CHECK: OpCompositeConstruct %v3float [[load]] [[undef]] [[undef]]
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In0 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpSourceExtension "GL_GOOGLE_cpp_style_line_directive"
OpSourceExtension "GL_GOOGLE_include_directive"
OpName %main "main"
OpName %In0 "In0"
OpName %OutColor "OutColor"
OpDecorate %In0 Location 0
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%6 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Input_v4float = OpTypePointer Input %v4float
%In0 = OpVariable %_ptr_Input_v4float Input
%uint = OpTypeInt 32 0
%uint_0 = OpConstant %uint 0
%_ptr_Input_float = OpTypePointer Input %float
%uint_1 = OpConstant %uint 1
%uint_2 = OpConstant %uint 2
%v3float = OpTypeVector %float 3
%int = OpTypeInt 32 1
%int_0 = OpConstant %int 0
%int_20 = OpConstant %int 20
%bool = OpTypeBool
%float_1 = OpConstant %float 1
%int_1 = OpConstant %int 1
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%23 = OpUndef %v3float
%main = OpFunction %void None %6
%24 = OpLabel
%25 = OpAccessChain %_ptr_Input_float %In0 %uint_0
%26 = OpLoad %float %25
%27 = OpAccessChain %_ptr_Input_float %In0 %uint_1
%28 = OpLoad %float %27
%29 = OpAccessChain %_ptr_Input_float %In0 %uint_2
%30 = OpLoad %float %29
%31 = OpCompositeConstruct %v3float %30 %28 %26
OpBranch %32
%32 = OpLabel
%33 = OpPhi %v3float %31 %24 %34 %35
%36 = OpPhi %int %int_0 %24 %37 %35
OpLoopMerge %38 %35 None
OpBranch %39
%39 = OpLabel
%40 = OpSLessThan %bool %36 %int_20
OpBranchConditional %40 %41 %38
%41 = OpLabel
%42 = OpCompositeExtract %float %33 0
%43 = OpFAdd %float %42 %float_1
%34 = OpCompositeInsert %v3float %43 %33 0
OpBranch %35
%35 = OpLabel
%37 = OpIAdd %int %36 %int_1
OpBranch %32
%38 = OpLabel
%44 = OpCompositeExtract %float %33 0
%45 = OpCompositeConstruct %v4float %44 %44 %44 %44
OpStore %OutColor %45
OpReturn
OpFunctionEnd
)";
SinglePassRunAndMatch<VectorDCE>(assembly, true);
}
TEST_F(VectorDCETest, DeadLoadFeedingVectorShuffle) {
// Detach the loads feeding the CompositeConstruct for the unused elements.
// TODO: Implement the rewrite for CompositeConstruct.
const std::string assembly =
R"(
; MemPass Type2Undef does not reuse and already existing undef.
; CHECK: {{%\w+}} = OpUndef %v3float
; CHECK: [[undef:%\w+]] = OpUndef %v3float
; CHECK: OpFunction
; CHECK: OpVectorShuffle %v3float {{%\w+}} [[undef]] 0 4 5
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In0 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpSourceExtension "GL_GOOGLE_cpp_style_line_directive"
OpSourceExtension "GL_GOOGLE_include_directive"
OpName %main "main"
OpName %In0 "In0"
OpName %OutColor "OutColor"
OpDecorate %In0 Location 0
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%6 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Input_v4float = OpTypePointer Input %v4float
%In0 = OpVariable %_ptr_Input_v4float Input
%uint = OpTypeInt 32 0
%uint_0 = OpConstant %uint 0
%_ptr_Input_float = OpTypePointer Input %float
%uint_1 = OpConstant %uint 1
%uint_2 = OpConstant %uint 2
%v3float = OpTypeVector %float 3
%int = OpTypeInt 32 1
%int_0 = OpConstant %int 0
%int_20 = OpConstant %int 20
%bool = OpTypeBool
%float_1 = OpConstant %float 1
%vec_const = OpConstantComposite %v3float %float_1 %float_1 %float_1
%int_1 = OpConstant %int 1
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%23 = OpUndef %v3float
%main = OpFunction %void None %6
%24 = OpLabel
%25 = OpAccessChain %_ptr_Input_float %In0 %uint_0
%26 = OpLoad %float %25
%27 = OpAccessChain %_ptr_Input_float %In0 %uint_1
%28 = OpLoad %float %27
%29 = OpAccessChain %_ptr_Input_float %In0 %uint_2
%30 = OpLoad %float %29
%31 = OpCompositeConstruct %v3float %30 %28 %26
%sh = OpVectorShuffle %v3float %vec_const %31 0 4 5
OpBranch %32
%32 = OpLabel
%33 = OpPhi %v3float %sh %24 %34 %35
%36 = OpPhi %int %int_0 %24 %37 %35
OpLoopMerge %38 %35 None
OpBranch %39
%39 = OpLabel
%40 = OpSLessThan %bool %36 %int_20
OpBranchConditional %40 %41 %38
%41 = OpLabel
%42 = OpCompositeExtract %float %33 0
%43 = OpFAdd %float %42 %float_1
%34 = OpCompositeInsert %v3float %43 %33 0
OpBranch %35
%35 = OpLabel
%37 = OpIAdd %int %36 %int_1
OpBranch %32
%38 = OpLabel
%44 = OpCompositeExtract %float %33 0
%45 = OpCompositeConstruct %v4float %44 %44 %44 %44
OpStore %OutColor %45
OpReturn
OpFunctionEnd
)";
SinglePassRunAndMatch<VectorDCE>(assembly, true);
}
TEST_F(VectorDCETest, DeadInstThroughShuffle) {
// Dead insert in chain with cycle. Demonstrates analysis can handle
// cycles in chains.
//
// Note: The SPIR-V assembly has had store/load elimination
// performed to allow the inserts and extracts to directly
// reference each other.
//
// #version 450
//
// layout (location=0) out vec4 OutColor;
//
// void main()
// {
// vec2 v;
// v.x = 0.0;
// v.y = 0.1; // dead
// for (int i = 0; i < 20; i++) {
// v.x = v.x + 1;
// v = v * 0.9;
// }
// OutColor = vec4(v.x);
// }
const std::string assembly =
R"(
; CHECK: OpFunction
; CHECK-NOT: OpCompositeInsert %v2float {{%\w+}} 1
; CHECK: OpFunctionEnd
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpSourceExtension "GL_GOOGLE_cpp_style_line_directive"
OpSourceExtension "GL_GOOGLE_include_directive"
OpName %main "main"
OpName %OutColor "OutColor"
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%3 = OpTypeFunction %void
%float = OpTypeFloat 32
%v2float = OpTypeVector %float 2
%float_0 = OpConstant %float 0
%float_0_100000001 = OpConstant %float 0.100000001
%int = OpTypeInt 32 1
%int_0 = OpConstant %int 0
%int_20 = OpConstant %int 20
%bool = OpTypeBool
%float_1 = OpConstant %float 1
%float_0_899999976 = OpConstant %float 0.899999976
%int_1 = OpConstant %int 1
%v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%58 = OpUndef %v2float
%main = OpFunction %void None %3
%5 = OpLabel
%49 = OpCompositeInsert %v2float %float_0 %58 0
%51 = OpCompositeInsert %v2float %float_0_100000001 %49 1
OpBranch %22
%22 = OpLabel
%60 = OpPhi %v2float %51 %5 %38 %25
%59 = OpPhi %int %int_0 %5 %41 %25
OpLoopMerge %24 %25 None
OpBranch %26
%26 = OpLabel
%30 = OpSLessThan %bool %59 %int_20
OpBranchConditional %30 %23 %24
%23 = OpLabel
%53 = OpCompositeExtract %float %60 0
%34 = OpFAdd %float %53 %float_1
%55 = OpCompositeInsert %v2float %34 %60 0
%38 = OpVectorTimesScalar %v2float %55 %float_0_899999976
OpBranch %25
%25 = OpLabel
%41 = OpIAdd %int %59 %int_1
OpBranch %22
%24 = OpLabel
%57 = OpCompositeExtract %float %60 0
%47 = OpCompositeConstruct %v4float %57 %57 %57 %57
OpStore %OutColor %47
OpReturn
OpFunctionEnd
)";
SinglePassRunAndMatch<VectorDCE>(assembly, true);
}
TEST_F(VectorDCETest, DeadInsertThroughOtherInst) {
// Dead insert in chain with cycle. Demonstrates analysis can handle
// cycles in chains.
//
// Note: The SPIR-V assembly has had store/load elimination
// performed to allow the inserts and extracts to directly
// reference each other.
//
// #version 450
//
// layout (location=0) out vec4 OutColor;
//
// void main()
// {
// vec2 v;
// v.x = 0.0;
// v.y = 0.1; // dead
// for (int i = 0; i < 20; i++) {
// v.x = v.x + 1;
// v = v * 0.9;
// }
// OutColor = vec4(v.x);
// }
const std::string assembly =
R"(
; CHECK: OpFunction
; CHECK-NOT: OpCompositeInsert %v2float {{%\w+}} 1
; CHECK: OpFunctionEnd
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpSourceExtension "GL_GOOGLE_cpp_style_line_directive"
OpSourceExtension "GL_GOOGLE_include_directive"
OpName %main "main"
OpName %OutColor "OutColor"
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%3 = OpTypeFunction %void
%float = OpTypeFloat 32
%v2float = OpTypeVector %float 2
%float_0 = OpConstant %float 0
%float_0_100000001 = OpConstant %float 0.100000001
%int = OpTypeInt 32 1
%int_0 = OpConstant %int 0
%int_20 = OpConstant %int 20
%bool = OpTypeBool
%float_1 = OpConstant %float 1
%float_0_899999976 = OpConstant %float 0.899999976
%int_1 = OpConstant %int 1
%v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%58 = OpUndef %v2float
%main = OpFunction %void None %3
%5 = OpLabel
%49 = OpCompositeInsert %v2float %float_0 %58 0
%51 = OpCompositeInsert %v2float %float_0_100000001 %49 1
OpBranch %22
%22 = OpLabel
%60 = OpPhi %v2float %51 %5 %38 %25
%59 = OpPhi %int %int_0 %5 %41 %25
OpLoopMerge %24 %25 None
OpBranch %26
%26 = OpLabel
%30 = OpSLessThan %bool %59 %int_20
OpBranchConditional %30 %23 %24
%23 = OpLabel
%53 = OpCompositeExtract %float %60 0
%34 = OpFAdd %float %53 %float_1
%55 = OpCompositeInsert %v2float %34 %60 0
%38 = OpVectorTimesScalar %v2float %55 %float_0_899999976
OpBranch %25
%25 = OpLabel
%41 = OpIAdd %int %59 %int_1
OpBranch %22
%24 = OpLabel
%57 = OpCompositeExtract %float %60 0
%47 = OpCompositeConstruct %v4float %57 %57 %57 %57
OpStore %OutColor %47
OpReturn
OpFunctionEnd
)";
SinglePassRunAndMatch<VectorDCE>(assembly, true);
}
TEST_F(VectorDCETest, VectorIntoCompositeConstruct) {
const std::string text = R"(OpCapability Linkage
OpCapability Shader
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %1 "EntryPoint_Main" %2 %3
OpExecutionMode %1 OriginUpperLeft
OpDecorate %2 Location 0
OpDecorate %_struct_4 Block
OpDecorate %3 Location 0
%float = OpTypeFloat 32
%v2float = OpTypeVector %float 2
%_ptr_Function_v2float = OpTypePointer Function %v2float
%v4float = OpTypeVector %float 4
%_ptr_Function_v4float = OpTypePointer Function %v4float
%mat4v4float = OpTypeMatrix %v4float 4
%_ptr_Function_mat4v4float = OpTypePointer Function %mat4v4float
%v3float = OpTypeVector %float 3
%_ptr_Function_v3float = OpTypePointer Function %v3float
%_struct_14 = OpTypeStruct %v2float %mat4v4float %v3float %v2float %v4float
%_ptr_Function__struct_14 = OpTypePointer Function %_struct_14
%void = OpTypeVoid
%int = OpTypeInt 32 1
%int_2 = OpConstant %int 2
%int_1 = OpConstant %int 1
%int_4 = OpConstant %int 4
%int_0 = OpConstant %int 0
%int_3 = OpConstant %int 3
%float_0 = OpConstant %float 0
%float_1 = OpConstant %float 1
%_ptr_Input_v2float = OpTypePointer Input %v2float
%2 = OpVariable %_ptr_Input_v2float Input
%_ptr_Output_v2float = OpTypePointer Output %v2float
%_struct_4 = OpTypeStruct %v2float
%_ptr_Output__struct_4 = OpTypePointer Output %_struct_4
%3 = OpVariable %_ptr_Output__struct_4 Output
%28 = OpTypeFunction %void
%29 = OpConstantComposite %v2float %float_0 %float_0
%30 = OpConstantComposite %v4float %float_0 %float_0 %float_0 %float_0
%31 = OpConstantComposite %mat4v4float %30 %30 %30 %30
%32 = OpConstantComposite %v3float %float_0 %float_0 %float_0
%1 = OpFunction %void None %28
%33 = OpLabel
%34 = OpVariable %_ptr_Function_v4float Function
%35 = OpVariable %_ptr_Function__struct_14 Function
%36 = OpAccessChain %_ptr_Function_v2float %35 %int_0
OpStore %36 %29
%37 = OpAccessChain %_ptr_Function_mat4v4float %35 %int_1
OpStore %37 %31
%38 = OpAccessChain %_ptr_Function_v3float %35 %int_2
OpStore %38 %32
%39 = OpAccessChain %_ptr_Function_v2float %35 %int_3
OpStore %39 %29
%40 = OpAccessChain %_ptr_Function_v4float %35 %int_4
OpStore %40 %30
%41 = OpLoad %v2float %2
OpStore %36 %41
%42 = OpLoad %v3float %38
%43 = OpCompositeConstruct %v4float %42 %float_1
%44 = OpLoad %mat4v4float %37
%45 = OpVectorTimesMatrix %v4float %43 %44
OpStore %34 %45
OpCopyMemory %40 %34
OpCopyMemory %36 %39
%46 = OpAccessChain %_ptr_Output_v2float %3 %int_0
%47 = OpLoad %v2float %36
OpStore %46 %47
OpReturn
OpFunctionEnd
)";
SinglePassRunAndCheck<VectorDCE>(text, text, true, true);
}
TEST_F(VectorDCETest, NotAffectedByDebugValue) {
// It tests that an OpenCL.DebugInfo.100 DebugValue instruction does
// not change the vector DCE pass result. If the composite used for
// the value of DebugValue is killed, the DebugValue must be killed as well.
const std::string text = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
%ext = OpExtInstImport "OpenCL.DebugInfo.100"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In2 %In0 %In1 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
%file_name = OpString "test"
%float_name = OpString "float"
%main_name = OpString "main"
%f_name = OpString "f"
OpName %main "main"
OpName %In2 "In2"
OpName %In0 "In0"
OpName %In1 "In1"
OpName %OutColor "OutColor"
OpName %_Globals_ "_Globals_"
OpMemberName %_Globals_ 0 "g_b"
OpMemberName %_Globals_ 1 "g_n"
OpName %_ ""
OpDecorate %In2 Location 2
OpDecorate %In0 Location 0
OpDecorate %In1 Location 1
OpDecorate %OutColor Location 0
OpMemberDecorate %_Globals_ 0 Offset 0
OpMemberDecorate %_Globals_ 1 Offset 4
OpDecorate %_Globals_ Block
OpDecorate %_ DescriptorSet 0
OpDecorate %_ Binding 0
%void = OpTypeVoid
%11 = OpTypeFunction %void
%float = OpTypeFloat 32
%v2float = OpTypeVector %float 2
%_ptr_Function_v2float = OpTypePointer Function %v2float
%_ptr_Input_v2float = OpTypePointer Input %v2float
%In2 = OpVariable %_ptr_Input_v2float Input
%_ptr_Input_float = OpTypePointer Input %float
%In0 = OpVariable %_ptr_Input_float Input
%In1 = OpVariable %_ptr_Input_float Input
%uint = OpTypeInt 32 0
%uint_32 = OpConstant %uint 32
%_ptr_Function_float = OpTypePointer Function %float
%float_0 = OpConstant %float 0
%v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%int = OpTypeInt 32 1
%_Globals_ = OpTypeStruct %uint %int
%_ptr_Uniform__Globals_ = OpTypePointer Uniform %_Globals_
%_ = OpVariable %_ptr_Uniform__Globals_ Uniform
%null_expr = OpExtInst %void %ext DebugExpression
%src = OpExtInst %void %ext DebugSource %file_name
%cu = OpExtInst %void %ext DebugCompilationUnit 1 4 %src HLSL
%dbg_tf = OpExtInst %void %ext DebugTypeBasic %float_name %uint_32 Float
%main_ty = OpExtInst %void %ext DebugTypeFunction FlagIsProtected|FlagIsPrivate %dbg_tf
%dbg_main = OpExtInst %void %ext DebugFunction %main_name %main_ty %src 0 0 %cu %main_name FlagIsProtected|FlagIsPrivate 10 %main
%dbg_f = OpExtInst %void %ext DebugLocalVariable %f_name %dbg_tf %src 0 0 %dbg_main FlagIsLocal
%main = OpFunction %void None %11
%25 = OpLabel
%s = OpExtInst %void %ext DebugScope %dbg_main
; CHECK: [[in2:%\w+]] = OpLoad %v2float %In2
%26 = OpLoad %v2float %In2
%27 = OpLoad %float %In0
%28 = OpLoad %float %In1
%29 = OpFAdd %float %27 %28
; CHECK: OpCompositeInsert %v2float {{%\w+}} [[in2]] 0
; CHECK-NEXT: OpCompositeInsert %v2float {{%\w+}} [[in2]] 0
; CHECK-NOT: DebugValue
%35 = OpCompositeInsert %v2float %29 %26 0
%value = OpExtInst %void %ext DebugValue %dbg_f %35 %null_expr
%37 = OpCompositeInsert %v2float %float_0 %35 0
%33 = OpVectorShuffle %v4float %37 %37 0 1 0 1
OpStore %OutColor %33
OpReturn
OpFunctionEnd
)";
SetDisassembleOptions(SPV_BINARY_TO_TEXT_OPTION_NO_HEADER |
SPV_BINARY_TO_TEXT_OPTION_FRIENDLY_NAMES);
SinglePassRunAndMatch<VectorDCE>(text, true);
}
TEST_F(VectorDCETest, RemoveDebugValueUsesKilledInstr) {
// It tests that the vector DCE pass removes the OpenCL.DebugInfo.100
// DebugValue instruction using a killed instruction.
const std::string text = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
%ext = OpExtInstImport "OpenCL.DebugInfo.100"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %In0 %OutColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
%file_name = OpString "test"
%float_name = OpString "float"
%main_name = OpString "main"
%f_name = OpString "f"
OpSourceExtension "GL_GOOGLE_cpp_style_line_directive"
OpSourceExtension "GL_GOOGLE_include_directive"
OpName %main "main"
OpName %In0 "In0"
OpName %OutColor "OutColor"
OpDecorate %In0 Location 0
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%6 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Input_v4float = OpTypePointer Input %v4float
%In0 = OpVariable %_ptr_Input_v4float Input
%uint = OpTypeInt 32 0
%uint_0 = OpConstant %uint 0
%uint_32 = OpConstant %uint 32
%_ptr_Input_float = OpTypePointer Input %float
%uint_1 = OpConstant %uint 1
%uint_2 = OpConstant %uint 2
%v3float = OpTypeVector %float 3
%int = OpTypeInt 32 1
%int_0 = OpConstant %int 0
%int_20 = OpConstant %int 20
%bool = OpTypeBool
%float_1 = OpConstant %float 1
%int_1 = OpConstant %int 1
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%23 = OpUndef %v3float
%null_expr = OpExtInst %void %ext DebugExpression
%src = OpExtInst %void %ext DebugSource %file_name
%cu = OpExtInst %void %ext DebugCompilationUnit 1 4 %src HLSL
%dbg_tf = OpExtInst %void %ext DebugTypeBasic %float_name %uint_32 Float
%main_ty = OpExtInst %void %ext DebugTypeFunction FlagIsProtected|FlagIsPrivate %dbg_tf
%dbg_main = OpExtInst %void %ext DebugFunction %main_name %main_ty %src 0 0 %cu %main_name FlagIsProtected|FlagIsPrivate 10 %main
%dbg_f = OpExtInst %void %ext DebugLocalVariable %f_name %dbg_tf %src 0 0 %dbg_main FlagIsLocal
%main = OpFunction %void None %6
%24 = OpLabel
%s0 = OpExtInst %void %ext DebugScope %dbg_main
%25 = OpAccessChain %_ptr_Input_float %In0 %uint_0
%26 = OpLoad %float %25
%27 = OpAccessChain %_ptr_Input_float %In0 %uint_1
%28 = OpLoad %float %27
; CHECK: [[undef:%\w+]] = OpUndef %float
; CHECK-NOT: DebugValue
%value = OpExtInst %void %ext DebugValue %dbg_f %28 %null_expr
%29 = OpAccessChain %_ptr_Input_float %In0 %uint_2
%30 = OpLoad %float %29
; CHECK: [[composite:%\w+]] = OpCompositeConstruct %v3float {{%\w+}} [[undef]] [[undef]]
; CHECK-NEXT: DebugValue {{%\w+}} [[composite]]
%31 = OpCompositeConstruct %v3float %30 %28 %26
%value_live = OpExtInst %void %ext DebugValue %dbg_f %31 %null_expr
OpBranch %32
%32 = OpLabel
%s1 = OpExtInst %void %ext DebugScope %dbg_main
%33 = OpPhi %v3float %31 %24 %34 %35
%36 = OpPhi %int %int_0 %24 %37 %35
OpLoopMerge %38 %35 None
OpBranch %39
%39 = OpLabel
%s2 = OpExtInst %void %ext DebugScope %dbg_main
%40 = OpSLessThan %bool %36 %int_20
OpBranchConditional %40 %41 %38
%41 = OpLabel
%s3 = OpExtInst %void %ext DebugScope %dbg_main
%42 = OpCompositeExtract %float %33 0
%43 = OpFAdd %float %42 %float_1
%34 = OpCompositeInsert %v3float %43 %33 0
OpBranch %35
%35 = OpLabel
%s4 = OpExtInst %void %ext DebugScope %dbg_main
%37 = OpIAdd %int %36 %int_1
OpBranch %32
%38 = OpLabel
%s5 = OpExtInst %void %ext DebugScope %dbg_main
%44 = OpCompositeExtract %float %33 0
%45 = OpCompositeConstruct %v4float %44 %44 %44 %44
OpStore %OutColor %45
OpReturn
OpFunctionEnd
)";
SetDisassembleOptions(SPV_BINARY_TO_TEXT_OPTION_NO_HEADER |
SPV_BINARY_TO_TEXT_OPTION_FRIENDLY_NAMES);
SinglePassRunAndMatch<VectorDCE>(text, true);
}
TEST_F(VectorDCETest, OutOfBoundsExtract) {
// It tests that the vector DCE pass is able to handle an extract with an
// index that is out of bounds.
const std::string text = R"(
; CHECK: [[undef:%\w+]] = OpUndef %v4float
; CHECK: OpCompositeExtract %float [[undef]] 8
OpCapability Shader
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %OutColor
OpExecutionMode %main OriginUpperLeft
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%10 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Output_float = OpTypePointer Output %float
%OutColor = OpVariable %_ptr_Output_float Output
%null = OpConstantNull %v4float
%float_1 = OpConstant %float 1
%main = OpFunction %void None %10
%28 = OpLabel
%33 = OpCompositeInsert %v4float %float_1 %null 1
%extract = OpCompositeExtract %float %33 8
OpStore %OutColor %extract
OpReturn
OpFunctionEnd
)";
SetDisassembleOptions(SPV_BINARY_TO_TEXT_OPTION_NO_HEADER |
SPV_BINARY_TO_TEXT_OPTION_FRIENDLY_NAMES);
SinglePassRunAndMatch<VectorDCE>(text, false);
}
TEST_F(VectorDCETest, OutOfBoundsShuffle) {
// It tests that the vector DCE pass is able to handle a shuffle with an
// index that is out of bounds.
const std::string text = R"(
; CHECK: [[undef:%\w+]] = OpUndef %v4float
; CHECK: OpVectorShuffle %v4float [[undef]] [[undef]] 9 10 11 12
OpCapability Shader
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %OutColor
OpExecutionMode %main OriginUpperLeft
OpDecorate %OutColor Location 0
%void = OpTypeVoid
%10 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%OutColor = OpVariable %_ptr_Output_v4float Output
%null = OpConstantNull %v4float
%float_1 = OpConstant %float 1
%main = OpFunction %void None %10
%28 = OpLabel
%33 = OpCompositeInsert %v4float %float_1 %null 1
%shuffle = OpVectorShuffle %v4float %33 %33 9 10 11 12
OpStore %OutColor %shuffle
OpReturn
OpFunctionEnd
)";
SetDisassembleOptions(SPV_BINARY_TO_TEXT_OPTION_NO_HEADER |
SPV_BINARY_TO_TEXT_OPTION_FRIENDLY_NAMES);
SinglePassRunAndMatch<VectorDCE>(text, false);
}
} // namespace
} // namespace opt
} // namespace spvtools
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