| #!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 constant folding code path |
| |
| # The test passes because the shader always writes red. |
| |
| SHADER vertex variant_vertex_shader PASSTHROUGH |
| |
| # variant_fragment_shader is derived from the following GLSL: |
| # #version 310 es |
| # precision highp float; |
| # |
| # precision highp int; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # layout(set = 0, binding = 0) uniform buf0 |
| # { |
| # float one; |
| # }; |
| # |
| # void main() |
| # { |
| # _GLF_color = vec4(0); |
| # |
| # // Always false. |
| # if(one < 0.0 || one < 1.0) |
| # return; |
| # |
| # // Always false. |
| # if(one < 0.0) |
| # { |
| # while (one < 0.0) |
| # { |
| # _GLF_color = vec4(1); |
| # break; |
| # } |
| # } |
| # else |
| # { |
| # _GLF_color = vec4(1, 0, 0, 1); |
| # } |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 8 |
| ; Bound: 50 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %9 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %9 "_GLF_color" |
| OpName %13 "buf0" |
| OpMemberName %13 0 "one" |
| OpName %15 "" |
| OpDecorate %9 Location 0 |
| OpMemberDecorate %13 0 Offset 0 |
| OpDecorate %13 Block |
| OpDecorate %15 DescriptorSet 0 |
| OpDecorate %15 Binding 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeVector %6 4 |
| %8 = OpTypePointer Output %7 |
| %9 = OpVariable %8 Output |
| %10 = OpConstant %6 0 |
| %11 = OpConstantComposite %7 %10 %10 %10 %10 |
| %12 = OpTypeBool |
| %13 = OpTypeStruct %6 |
| %14 = OpTypePointer Uniform %13 |
| %15 = OpVariable %14 Uniform |
| %16 = OpTypeInt 32 1 |
| %17 = OpConstant %16 0 |
| %18 = OpTypePointer Uniform %6 |
| %27 = OpConstant %6 1 |
| %46 = OpConstantComposite %7 %27 %27 %27 %27 |
| %49 = OpConstantComposite %7 %27 %10 %10 %27 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| OpStore %9 %11 |
| %19 = OpAccessChain %18 %15 %17 |
| %20 = OpLoad %6 %19 |
| %21 = OpFOrdLessThan %12 %20 %10 |
| %22 = OpLogicalNot %12 %21 |
| OpSelectionMerge %24 None |
| OpBranchConditional %22 %23 %24 |
| %23 = OpLabel |
| %25 = OpAccessChain %18 %15 %17 |
| %26 = OpLoad %6 %25 |
| %28 = OpFOrdLessThan %12 %26 %27 |
| OpBranch %24 |
| %24 = OpLabel |
| %29 = OpPhi %12 %21 %5 %28 %23 |
| OpSelectionMerge %31 None |
| OpBranchConditional %29 %30 %31 |
| %30 = OpLabel |
| OpReturn |
| %31 = OpLabel |
| %33 = OpAccessChain %18 %15 %17 |
| %34 = OpLoad %6 %33 |
| %35 = OpFOrdLessThan %12 %34 %10 |
| OpSelectionMerge %37 None |
| OpBranchConditional %35 %36 %48 |
| %36 = OpLabel |
| OpBranch %38 |
| %38 = OpLabel |
| OpLoopMerge %40 %41 None |
| OpBranch %42 |
| %42 = OpLabel |
| %43 = OpAccessChain %18 %15 %17 |
| %44 = OpLoad %6 %43 |
| %45 = OpFOrdLessThan %12 %44 %10 |
| OpBranchConditional %45 %39 %40 |
| %39 = OpLabel |
| OpStore %9 %46 |
| OpBranch %40 |
| %41 = OpLabel |
| OpBranch %38 |
| %40 = OpLabel |
| OpBranch %37 |
| %48 = OpLabel |
| OpStore %9 %49 |
| OpBranch %37 |
| %37 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| # one |
| BUFFER variant_one DATA_TYPE float DATA |
| 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_one 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 |