| #!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 fragment shader with unreachable while loop |
| |
| # The test passes because the shader always writes the color red. |
| # The rest of the code is never reached. |
| |
| # 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; |
| # }; |
| # |
| # float deadCode() |
| # { |
| # float s; |
| # for (int i = 1; true; 1) |
| # { |
| # if (gl_FragCoord.x < 0.0) |
| # { |
| # if (injectionSwitch.x > 1.0) |
| # { |
| # return 1.0; |
| # } |
| # continue; |
| # } |
| # return s; |
| # } |
| # return 1.0; |
| # } |
| # |
| # void main() |
| # { |
| # if (injectionSwitch.x > 1.0) // Always false |
| # { |
| # vec4 c; |
| # c.y = deadCode(); |
| # _GLF_color = c; |
| # } |
| # |
| # // Always write color red because the other code is never reached. |
| # _GLF_color = vec4(1.0, 0.0, 0.0, 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: 120 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %23 %64 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %23 "gl_FragCoord" |
| OpName %34 "buf0" |
| OpMemberName %34 0 "injectionSwitch" |
| OpName %36 "" |
| OpName %64 "_GLF_color" |
| OpDecorate %23 BuiltIn FragCoord |
| OpMemberDecorate %34 0 Offset 0 |
| OpDecorate %34 Block |
| OpDecorate %36 DescriptorSet 0 |
| OpDecorate %36 Binding 0 |
| OpDecorate %64 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %10 = OpTypeInt 32 1 |
| %19 = OpTypeBool |
| %21 = OpTypeVector %6 4 |
| %22 = OpTypePointer Input %21 |
| %23 = OpVariable %22 Input |
| %24 = OpTypeInt 32 0 |
| %25 = OpConstant %24 0 |
| %26 = OpTypePointer Input %6 |
| %29 = OpConstant %6 0 |
| %33 = OpTypeVector %6 2 |
| %34 = OpTypeStruct %33 |
| %35 = OpTypePointer Uniform %34 |
| %36 = OpVariable %35 Uniform |
| %37 = OpConstant %10 0 |
| %38 = OpTypePointer Uniform %6 |
| %41 = OpConstant %6 1 |
| %63 = OpTypePointer Output %21 |
| %64 = OpVariable %63 Output |
| %66 = OpConstantComposite %21 %41 %29 %29 %41 |
| %110 = OpUndef %6 |
| %118 = OpUndef %21 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %53 = OpAccessChain %38 %36 %37 %25 |
| %54 = OpLoad %6 %53 |
| %55 = OpFOrdGreaterThan %19 %54 %41 |
| OpSelectionMerge %57 None |
| OpBranchConditional %55 %56 %57 |
| %56 = OpLabel |
| OpBranch %83 |
| %83 = OpLabel |
| OpLoopMerge %84 %85 None |
| OpBranch %87 |
| %87 = OpLabel |
| OpLoopMerge %88 %100 None |
| OpBranch %91 |
| %91 = OpLabel |
| %92 = OpAccessChain %26 %23 %25 |
| %93 = OpLoad %6 %92 |
| %94 = OpFOrdLessThan %19 %93 %29 |
| OpSelectionMerge %95 None |
| OpBranchConditional %94 %96 %95 |
| %96 = OpLabel |
| OpSelectionMerge %119 None |
| OpBranchConditional %55 %101 %100 |
| %101 = OpLabel |
| OpBranch %88 |
| %119 = OpLabel |
| OpBranch %100 |
| %100 = OpLabel |
| OpBranch %87 |
| %95 = OpLabel |
| OpBranch %88 |
| %88 = OpLabel |
| %113 = OpPhi %6 %41 %101 %110 %95 |
| OpBranch %84 |
| %85 = OpLabel |
| OpBranch %83 |
| %84 = OpLabel |
| %107 = OpCompositeInsert %21 %113 %118 1 |
| OpStore %64 %107 |
| OpBranch %57 |
| %57 = OpLabel |
| OpStore %64 %66 |
| OpReturn |
| 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 |