| #!amber |
| |
| # Copyright 2019 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. |
| |
| |
| # A test for a bug found by GraphicsFuzz. |
| |
| # Short description: A shader with a switch statement containing unreachable discards |
| |
| # The test passes because the shader always writes the color red. |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '-O' |
| # spirv-opt commit hash: 6b072126595dd8c2448eb1fda616251c5e6d7079 |
| |
| |
| |
| SHADER vertex variant_vertex_shader PASSTHROUGH |
| |
| # variant_fragment_shader is derived from the following GLSL: |
| # #version 310 es |
| # precision highp float; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # layout(set = 0, binding = 0) uniform buf0 { |
| # vec2 injectionSwitch; |
| # }; |
| # vec3 drawShape(vec2 square) |
| # { |
| # switch(int(injectionSwitch.x)) |
| # { |
| # case 0: |
| # return vec3(1.0, 0.0, 0.0); |
| # case 67: |
| # do |
| # { |
| # if(1.0 < square.x) |
| # { |
| # } |
| # else |
| # { |
| # discard; |
| # } |
| # discard; |
| # } |
| # while(true); |
| # } |
| # return vec3(1.0); |
| # } |
| # void main() |
| # { |
| # vec2 center; |
| # vec3 color = vec3(0.0); |
| # for( |
| # int i = 0; |
| # i < 1; |
| # i++ |
| # ) |
| # { |
| # color = drawShape(center); |
| # if(length(color) <= 0.0) |
| # { |
| # continue; |
| # } |
| # } |
| # _GLF_color = vec4(color, 1.0); |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 7 |
| ; Bound: 139 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %78 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %14 "buf0" |
| OpMemberName %14 0 "injectionSwitch" |
| OpName %16 "" |
| OpName %78 "_GLF_color" |
| OpMemberDecorate %14 0 Offset 0 |
| OpDecorate %14 Block |
| OpDecorate %16 DescriptorSet 0 |
| OpDecorate %16 Binding 0 |
| OpDecorate %75 RelaxedPrecision |
| OpDecorate %78 Location 0 |
| OpDecorate %132 RelaxedPrecision |
| OpDecorate %132 RelaxedPrecision |
| OpDecorate %132 RelaxedPrecision |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeVector %6 2 |
| %9 = OpTypeVector %6 3 |
| %14 = OpTypeStruct %7 |
| %15 = OpTypePointer Uniform %14 |
| %16 = OpVariable %15 Uniform |
| %17 = OpTypeInt 32 1 |
| %18 = OpConstant %17 0 |
| %19 = OpTypeInt 32 0 |
| %20 = OpConstant %19 0 |
| %21 = OpTypePointer Uniform %6 |
| %28 = OpConstant %6 1 |
| %29 = OpConstant %6 0 |
| %30 = OpConstantComposite %9 %28 %29 %29 |
| %39 = OpTypeBool |
| %48 = OpConstantComposite %9 %28 %28 %28 |
| %53 = OpConstantComposite %9 %29 %29 %29 |
| %62 = OpConstant %17 1 |
| %76 = OpTypeVector %6 4 |
| %77 = OpTypePointer Output %76 |
| %78 = OpVariable %77 Output |
| %135 = OpUndef %7 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| OpBranch %56 |
| %56 = OpLabel |
| %133 = OpPhi %9 %53 %5 %137 %59 |
| %132 = OpPhi %17 %18 %5 %75 %59 |
| %63 = OpSLessThan %39 %132 %62 |
| OpLoopMerge %58 %59 None |
| OpBranchConditional %63 %57 %58 |
| %57 = OpLabel |
| OpBranch %104 |
| %104 = OpLabel |
| OpLoopMerge %105 %106 None |
| OpBranch %107 |
| %107 = OpLabel |
| %108 = OpAccessChain %21 %16 %18 %20 |
| %109 = OpLoad %6 %108 |
| %110 = OpConvertFToS %17 %109 |
| OpSelectionMerge %111 None |
| OpSwitch %110 %111 0 %112 67 %113 |
| %113 = OpLabel |
| OpBranch %114 |
| %114 = OpLabel |
| OpLoopMerge %115 %116 None |
| OpBranch %117 |
| %117 = OpLabel |
| %119 = OpCompositeExtract %6 %135 0 |
| %120 = OpFOrdLessThan %39 %28 %119 |
| OpSelectionMerge %122 None |
| OpBranchConditional %120 %122 %123 |
| %123 = OpLabel |
| %124 = OpFunctionCall %2 %84 |
| %125 = OpUndef %9 |
| OpBranch %115 |
| %122 = OpLabel |
| %126 = OpFunctionCall %2 %84 |
| %127 = OpUndef %9 |
| OpBranch %115 |
| %116 = OpLabel |
| OpBranch %114 |
| %115 = OpLabel |
| %138 = OpPhi %9 %125 %123 %127 %122 |
| OpBranch %105 |
| %112 = OpLabel |
| OpBranch %105 |
| %111 = OpLabel |
| OpBranch %105 |
| %106 = OpLabel |
| OpBranch %104 |
| %105 = OpLabel |
| %137 = OpPhi %9 %138 %115 %30 %112 %48 %111 |
| %69 = OpExtInst %6 %1 Length %137 |
| %70 = OpFOrdLessThanEqual %39 %69 %29 |
| OpSelectionMerge %72 None |
| OpBranchConditional %70 %71 %72 |
| %71 = OpLabel |
| OpBranch %59 |
| %72 = OpLabel |
| OpBranch %59 |
| %59 = OpLabel |
| %75 = OpIAdd %17 %132 %62 |
| OpBranch %56 |
| %58 = OpLabel |
| %80 = OpCompositeExtract %6 %133 0 |
| %81 = OpCompositeExtract %6 %133 1 |
| %82 = OpCompositeExtract %6 %133 2 |
| %83 = OpCompositeConstruct %76 %80 %81 %82 %28 |
| OpStore %78 %83 |
| OpReturn |
| OpFunctionEnd |
| %84 = OpFunction %2 None %3 |
| %85 = OpLabel |
| OpKill |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| # injectionSwitch |
| BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA |
| 0.0 1.0 |
| END |
| |
| BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM |
| |
| PIPELINE graphics variant_pipeline |
| ATTACH variant_vertex_shader |
| ATTACH variant_fragment_shader |
| FRAMEBUFFER_SIZE 256 256 |
| BIND BUFFER variant_framebuffer AS color LOCATION 0 |
| BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 0 |
| END |
| CLEAR_COLOR variant_pipeline 0 0 0 255 |
| |
| CLEAR variant_pipeline |
| RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 |
| |
| EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 |