| #!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 single block elimination path. |
| |
| # The test passes because 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; |
| # |
| # layout(set = 0, binding = 0) uniform buf0 { |
| # vec2 injectionSwitch; |
| # }; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # int g = 0; |
| # |
| # void main() |
| # { |
| # while(g < int(injectionSwitch.x + 2.0)) { |
| # g++; |
| # } |
| # |
| # // g is 2. |
| # int a = g; |
| # |
| # // Always false. |
| # while(g < int(injectionSwitch.y)) { |
| # g++; |
| # } |
| # |
| # a = a; |
| # |
| # // Always true. |
| # if(a == 2) |
| # _GLF_color = vec4(1, 0, 0, 1); |
| # else |
| # _GLF_color = vec4(0); |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 8 |
| ; Bound: 64 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %58 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %8 "g" |
| OpName %18 "buf0" |
| OpMemberName %18 0 "injectionSwitch" |
| OpName %20 "" |
| OpName %35 "a" |
| OpName %58 "_GLF_color" |
| OpDecorate %8 RelaxedPrecision |
| OpDecorate %15 RelaxedPrecision |
| OpMemberDecorate %18 0 Offset 0 |
| OpDecorate %18 Block |
| OpDecorate %20 DescriptorSet 0 |
| OpDecorate %20 Binding 0 |
| OpDecorate %31 RelaxedPrecision |
| OpDecorate %33 RelaxedPrecision |
| OpDecorate %35 RelaxedPrecision |
| OpDecorate %36 RelaxedPrecision |
| OpDecorate %42 RelaxedPrecision |
| OpDecorate %48 RelaxedPrecision |
| OpDecorate %49 RelaxedPrecision |
| OpDecorate %50 RelaxedPrecision |
| OpDecorate %51 RelaxedPrecision |
| OpDecorate %58 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeInt 32 1 |
| %7 = OpTypePointer Private %6 |
| %8 = OpVariable %7 Private |
| %9 = OpConstant %6 0 |
| %16 = OpTypeFloat 32 |
| %17 = OpTypeVector %16 2 |
| %18 = OpTypeStruct %17 |
| %19 = OpTypePointer Uniform %18 |
| %20 = OpVariable %19 Uniform |
| %21 = OpTypeInt 32 0 |
| %22 = OpConstant %21 0 |
| %23 = OpTypePointer Uniform %16 |
| %26 = OpConstant %16 2 |
| %29 = OpTypeBool |
| %32 = OpConstant %6 1 |
| %34 = OpTypePointer Function %6 |
| %43 = OpConstant %21 1 |
| %52 = OpConstant %6 2 |
| %56 = OpTypeVector %16 4 |
| %57 = OpTypePointer Output %56 |
| %58 = OpVariable %57 Output |
| %59 = OpConstant %16 1 |
| %60 = OpConstant %16 0 |
| %61 = OpConstantComposite %56 %59 %60 %60 %59 |
| %63 = OpConstantComposite %56 %60 %60 %60 %60 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %35 = OpVariable %34 Function |
| OpStore %8 %9 |
| OpBranch %10 |
| %10 = OpLabel |
| OpLoopMerge %12 %13 None |
| OpBranch %14 |
| %14 = OpLabel |
| %15 = OpLoad %6 %8 |
| %24 = OpAccessChain %23 %20 %9 %22 |
| %25 = OpLoad %16 %24 |
| %27 = OpFAdd %16 %25 %26 |
| %28 = OpConvertFToS %6 %27 |
| %30 = OpSLessThan %29 %15 %28 |
| OpBranchConditional %30 %11 %12 |
| %11 = OpLabel |
| %31 = OpLoad %6 %8 |
| %33 = OpIAdd %6 %31 %32 |
| OpStore %8 %33 |
| OpBranch %13 |
| %13 = OpLabel |
| OpBranch %10 |
| %12 = OpLabel |
| %36 = OpLoad %6 %8 |
| OpStore %35 %36 |
| OpBranch %37 |
| %37 = OpLabel |
| OpLoopMerge %39 %40 None |
| OpBranch %41 |
| %41 = OpLabel |
| %42 = OpLoad %6 %8 |
| %44 = OpAccessChain %23 %20 %9 %43 |
| %45 = OpLoad %16 %44 |
| %46 = OpConvertFToS %6 %45 |
| %47 = OpSLessThan %29 %42 %46 |
| OpBranchConditional %47 %38 %39 |
| %38 = OpLabel |
| %48 = OpLoad %6 %8 |
| %49 = OpIAdd %6 %48 %32 |
| OpStore %8 %49 |
| OpBranch %40 |
| %40 = OpLabel |
| OpBranch %37 |
| %39 = OpLabel |
| %50 = OpLoad %6 %35 |
| OpStore %35 %50 |
| %51 = OpLoad %6 %35 |
| %53 = OpIEqual %29 %51 %52 |
| OpSelectionMerge %55 None |
| OpBranchConditional %53 %54 %62 |
| %54 = OpLabel |
| OpStore %58 %61 |
| OpBranch %55 |
| %62 = OpLabel |
| OpStore %58 %63 |
| OpBranch %55 |
| %55 = OpLabel |
| 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 |