| #!amber |
| |
| # Copyright 2020 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 the GraphicsFuzz project. |
| |
| # Short description: A fragment shader with recurrent always false if statement |
| |
| # The test passes because the shader always writes color red. |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--vector-dce' |
| # '--vector-dce' |
| # '--scalar-replacement=100' |
| # '--redundancy-elimination' |
| # '--redundancy-elimination' |
| # '--eliminate-dead-branches' |
| # '--eliminate-dead-branches' |
| # '--merge-blocks' |
| # '--scalar-replacement=100' |
| # '--reduce-load-size' |
| # '--copy-propagate-arrays' |
| # '--eliminate-dead-branches' |
| # '--merge-blocks' |
| # '--eliminate-dead-code-aggressive' |
| # '--inline-entry-points-exhaustive' |
| # '--simplify-instructions' |
| # '--redundancy-elimination' |
| # '--ccp' |
| # '--eliminate-local-single-block' |
| # '--scalar-replacement=100' |
| # '--reduce-load-size' |
| # '--eliminate-local-single-block' |
| # '--reduce-load-size' |
| # '--eliminate-local-single-store' |
| # '--inline-entry-points-exhaustive' |
| # spirv-opt commit hash: 230f363e6da32791f640b02205e0645cc67c3f1d |
| |
| |
| |
| SHADER vertex variant_vertex_shader PASSTHROUGH |
| |
| # variant_fragment_shader is derived from the following GLSL: |
| # #version 320 es |
| # precision highp float; |
| # |
| # precision highp int; |
| # |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # layout(set = 0, binding = 0) uniform buf0 |
| # { |
| # vec2 injectionSwitch; // x == 0.0, y == 1.0 |
| # }; |
| # void main() |
| # { |
| # const int loop_limit = 100; |
| # int loop_count = 0; |
| # // Always false. |
| # if (injectionSwitch.x > injectionSwitch.y) |
| # { |
| # return; |
| # } |
| # // Always false. |
| # gl_FragCoord.x < log(1.0); |
| # for (; loop_count < loop_limit; loop_count++) |
| # { |
| # // Always false. |
| # if (injectionSwitch.x > injectionSwitch.y) |
| # { |
| # break; |
| # } |
| # // Always false. |
| # if (injectionSwitch.x > injectionSwitch.y) |
| # { |
| # _GLF_color = vec4(1.0); |
| # } |
| # else |
| # { |
| # // Always false. |
| # if (gl_FragCoord.x < 0.0) |
| # { |
| # return; |
| # } |
| # } |
| # // Always false. |
| # if (injectionSwitch.x > injectionSwitch.y) |
| # { |
| # _GLF_color = vec4(1.0); |
| # } |
| # else |
| # { |
| # _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); |
| # } |
| # // Always false. |
| # if (injectionSwitch.x > injectionSwitch.y) |
| # { |
| # return; |
| # } |
| # // Always false. |
| # if (gl_FragCoord.x < 0.0) |
| # { |
| # for (; loop_count < loop_limit; loop_count++) |
| # { |
| # } |
| # } |
| # } |
| # if(loop_count >= loop_limit) |
| # { |
| # _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); |
| # } |
| # else |
| # { |
| # _GLF_color = vec4(1.0); |
| # } |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 10 |
| ; Bound: 109 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %30 %60 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 320 |
| OpName %4 "main" |
| OpName %8 "loop_count" |
| OpName %12 "buf0" |
| OpMemberName %12 0 "injectionSwitch" |
| OpName %14 "" |
| OpName %30 "gl_FragCoord" |
| OpName %60 "_GLF_color" |
| OpMemberDecorate %12 0 Offset 0 |
| OpDecorate %12 Block |
| OpDecorate %14 DescriptorSet 0 |
| OpDecorate %14 Binding 0 |
| OpDecorate %30 BuiltIn FragCoord |
| OpDecorate %60 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeInt 32 1 |
| %7 = OpTypePointer Function %6 |
| %9 = OpConstant %6 0 |
| %10 = OpTypeFloat 32 |
| %11 = OpTypeVector %10 2 |
| %12 = OpTypeStruct %11 |
| %13 = OpTypePointer Uniform %12 |
| %14 = OpVariable %13 Uniform |
| %15 = OpTypeInt 32 0 |
| %16 = OpConstant %15 0 |
| %17 = OpTypePointer Uniform %10 |
| %20 = OpConstant %15 1 |
| %23 = OpTypeBool |
| %28 = OpTypeVector %10 4 |
| %29 = OpTypePointer Input %28 |
| %30 = OpVariable %29 Input |
| %31 = OpTypePointer Input %10 |
| %34 = OpConstant %10 0 |
| %42 = OpConstant %6 100 |
| %59 = OpTypePointer Output %28 |
| %60 = OpVariable %59 Output |
| %61 = OpConstant %10 1 |
| %62 = OpConstantComposite %28 %61 %61 %61 %61 |
| %78 = OpConstantComposite %28 %61 %34 %34 %61 |
| %100 = OpConstant %6 1 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %8 = OpVariable %7 Function |
| OpStore %8 %9 |
| %18 = OpAccessChain %17 %14 %9 %16 |
| %19 = OpLoad %10 %18 |
| %21 = OpAccessChain %17 %14 %9 %20 |
| %22 = OpLoad %10 %21 |
| %24 = OpFOrdGreaterThan %23 %19 %22 |
| OpSelectionMerge %26 None |
| OpBranchConditional %24 %25 %26 |
| %25 = OpLabel |
| OpReturn |
| %26 = OpLabel |
| %32 = OpAccessChain %31 %30 %16 |
| %33 = OpLoad %10 %32 |
| %35 = OpFOrdLessThan %23 %33 %34 |
| OpBranch %36 |
| %36 = OpLabel |
| %41 = OpLoad %6 %8 |
| %43 = OpSLessThan %23 %41 %42 |
| OpLoopMerge %38 %39 None |
| OpBranchConditional %43 %37 %38 |
| %37 = OpLabel |
| OpSelectionMerge %50 None |
| OpBranchConditional %24 %49 %50 |
| %49 = OpLabel |
| OpBranch %38 |
| %50 = OpLabel |
| OpSelectionMerge %58 None |
| OpBranchConditional %24 %57 %63 |
| %57 = OpLabel |
| OpStore %60 %62 |
| OpBranch %58 |
| %63 = OpLabel |
| OpSelectionMerge %68 None |
| OpBranchConditional %35 %67 %68 |
| %67 = OpLabel |
| OpReturn |
| %68 = OpLabel |
| OpBranch %58 |
| %58 = OpLabel |
| OpSelectionMerge %76 None |
| OpBranchConditional %24 %75 %77 |
| %75 = OpLabel |
| OpStore %60 %62 |
| OpBranch %76 |
| %77 = OpLabel |
| OpStore %60 %78 |
| OpBranch %76 |
| %76 = OpLabel |
| OpSelectionMerge %85 None |
| OpBranchConditional %24 %84 %85 |
| %84 = OpLabel |
| OpReturn |
| %85 = OpLabel |
| OpSelectionMerge %91 None |
| OpBranchConditional %35 %90 %91 |
| %90 = OpLabel |
| OpBranch %92 |
| %92 = OpLabel |
| %97 = OpLoad %6 %8 |
| %98 = OpSLessThan %23 %97 %42 |
| OpLoopMerge %94 %93 None |
| OpBranchConditional %98 %93 %94 |
| %93 = OpLabel |
| %99 = OpLoad %6 %8 |
| %101 = OpIAdd %6 %99 %100 |
| OpStore %8 %101 |
| OpBranch %92 |
| %94 = OpLabel |
| OpBranch %91 |
| %91 = OpLabel |
| OpBranch %39 |
| %39 = OpLabel |
| %102 = OpLoad %6 %8 |
| %103 = OpIAdd %6 %102 %100 |
| OpStore %8 %103 |
| OpBranch %36 |
| %38 = OpLabel |
| %104 = OpLoad %6 %8 |
| %105 = OpSGreaterThanEqual %23 %104 %42 |
| OpSelectionMerge %107 None |
| OpBranchConditional %105 %106 %108 |
| %106 = OpLabel |
| OpStore %60 %78 |
| OpBranch %107 |
| %108 = OpLabel |
| OpStore %60 %62 |
| OpBranch %107 |
| %107 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| # injectionSwitch |
| BUFFER variant_injectionSwitch DATA_TYPE vec2<float> STD140 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 |
