| #!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 coverage-gap found by GraphicsFuzz. |
| |
| # Short description: A fragment shader that covers a specific return merge path. |
| |
| # The test passes because shader always writes red. |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--simplify-instructions' |
| # '--eliminate-dead-branches' |
| # '--merge-blocks' |
| # '--private-to-local' |
| # '--eliminate-local-single-block' |
| # '--eliminate-local-single-block' |
| # '--if-conversion' |
| # '--eliminate-local-multi-store' |
| # spirv-opt commit hash: 9215c1b7df0029f27807e8c8d7ec80532ce90a87 |
| |
| |
| |
| 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 |
| # { |
| # float three; |
| # }; |
| # |
| # // Always returns 1.0. |
| # float func() |
| # { |
| # float b = 2.0; |
| # |
| # do |
| # { |
| # // Always false. |
| # if (three == 0.0) |
| # break; |
| # |
| # // Always false. |
| # if (three == 0.0) |
| # return 1.0; |
| # |
| # b = 1.0; |
| # } |
| # while(false); |
| # |
| # return b; |
| # } |
| # |
| # void main() |
| # { |
| # if (func() == 1.0) |
| # _GLF_color = vec4(1, 0, 0, 1); |
| # else |
| # _GLF_color = vec4(0); |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 8 |
| ; Bound: 54 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %48 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %8 "func(" |
| OpName %11 "b" |
| OpName %17 "buf0" |
| OpMemberName %17 0 "three" |
| OpName %19 "" |
| OpName %48 "_GLF_color" |
| OpMemberDecorate %17 0 Offset 0 |
| OpDecorate %17 Block |
| OpDecorate %19 DescriptorSet 0 |
| OpDecorate %19 Binding 0 |
| OpDecorate %48 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeFunction %6 |
| %10 = OpTypePointer Function %6 |
| %12 = OpConstant %6 2 |
| %17 = OpTypeStruct %6 |
| %18 = OpTypePointer Uniform %17 |
| %19 = OpVariable %18 Uniform |
| %20 = OpTypeInt 32 1 |
| %21 = OpConstant %20 0 |
| %22 = OpTypePointer Uniform %6 |
| %25 = OpConstant %6 0 |
| %26 = OpTypeBool |
| %36 = OpConstant %6 1 |
| %38 = OpConstantFalse %26 |
| %46 = OpTypeVector %6 4 |
| %47 = OpTypePointer Output %46 |
| %48 = OpVariable %47 Output |
| %49 = OpConstantComposite %46 %36 %25 %25 %36 |
| %51 = OpConstantComposite %46 %25 %25 %25 %25 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %42 = OpFunctionCall %6 %8 |
| %43 = OpFOrdEqual %26 %42 %36 |
| OpSelectionMerge %45 None |
| OpBranchConditional %43 %44 %50 |
| %44 = OpLabel |
| OpStore %48 %49 |
| OpBranch %45 |
| %50 = OpLabel |
| OpStore %48 %51 |
| OpBranch %45 |
| %45 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| %8 = OpFunction %6 None %7 |
| %9 = OpLabel |
| %11 = OpVariable %10 Function |
| OpStore %11 %12 |
| OpBranch %13 |
| %13 = OpLabel |
| %53 = OpPhi %6 %12 %9 %36 %16 |
| OpLoopMerge %15 %16 None |
| OpBranch %14 |
| %14 = OpLabel |
| %23 = OpAccessChain %22 %19 %21 |
| %24 = OpLoad %6 %23 |
| %27 = OpFOrdEqual %26 %24 %25 |
| OpSelectionMerge %29 None |
| OpBranchConditional %27 %28 %29 |
| %28 = OpLabel |
| OpBranch %15 |
| %29 = OpLabel |
| %31 = OpAccessChain %22 %19 %21 |
| %32 = OpLoad %6 %31 |
| %33 = OpFOrdEqual %26 %32 %25 |
| OpSelectionMerge %35 None |
| OpBranchConditional %33 %34 %35 |
| %34 = OpLabel |
| OpReturnValue %36 |
| %35 = OpLabel |
| OpStore %11 %36 |
| OpBranch %16 |
| %16 = OpLabel |
| OpBranchConditional %38 %13 %15 |
| %15 = OpLabel |
| %52 = OpPhi %6 %53 %28 %36 %16 |
| OpReturnValue %52 |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| # three |
| BUFFER variant_three DATA_TYPE float DATA |
| 3.0 |
| 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_three 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 |