| #!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 basic block code path |
| |
| # The test passes because shader always writes red. |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--vector-dce' |
| # '--combine-access-chains' |
| # '--eliminate-local-multi-store' |
| # '--scalar-replacement=100' |
| # '--simplify-instructions' |
| # '--eliminate-dead-branches' |
| # '--merge-return' |
| # '--combine-access-chains' |
| # '--simplify-instructions' |
| # '--eliminate-dead-branches' |
| # '--merge-blocks' |
| # 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; |
| # precision highp int; |
| # |
| # layout(set = 0, binding = 0) uniform buf0 |
| # { |
| # int zero; |
| # }; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # int func(int x) |
| # { |
| # if (x == 10) // Always false. |
| # discard; |
| # |
| # return x; |
| # } |
| # |
| # void main() |
| # { |
| # int a = 0; |
| # int b = zero; |
| # |
| # do |
| # { |
| # a = func(b); |
| # b++; |
| # } |
| # while(b < 4); |
| # |
| # if (a == 3) |
| # _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: 59 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %52 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %10 "func(i1;" |
| OpName %9 "x" |
| OpName %22 "a" |
| OpName %24 "b" |
| OpName %25 "buf0" |
| OpMemberName %25 0 "zero" |
| OpName %27 "" |
| OpName %35 "param" |
| OpName %52 "_GLF_color" |
| OpMemberDecorate %25 0 Offset 0 |
| OpDecorate %25 Block |
| OpDecorate %27 DescriptorSet 0 |
| OpDecorate %27 Binding 0 |
| OpDecorate %52 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeInt 32 1 |
| %7 = OpTypePointer Function %6 |
| %8 = OpTypeFunction %6 %7 |
| %13 = OpConstant %6 10 |
| %14 = OpTypeBool |
| %23 = OpConstant %6 0 |
| %25 = OpTypeStruct %6 |
| %26 = OpTypePointer Uniform %25 |
| %27 = OpVariable %26 Uniform |
| %28 = OpTypePointer Uniform %6 |
| %39 = OpConstant %6 1 |
| %42 = OpConstant %6 4 |
| %45 = OpConstant %6 3 |
| %49 = OpTypeFloat 32 |
| %50 = OpTypeVector %49 4 |
| %51 = OpTypePointer Output %50 |
| %52 = OpVariable %51 Output |
| %53 = OpConstant %49 1 |
| %54 = OpConstant %49 0 |
| %55 = OpConstantComposite %50 %53 %54 %54 %53 |
| %57 = OpConstantComposite %50 %54 %54 %54 %54 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %22 = OpVariable %7 Function |
| %24 = OpVariable %7 Function |
| %35 = OpVariable %7 Function |
| OpStore %22 %23 |
| %29 = OpAccessChain %28 %27 %23 |
| %30 = OpLoad %6 %29 |
| OpStore %24 %30 |
| OpBranch %31 |
| %31 = OpLabel |
| %58 = OpPhi %6 %30 %5 %40 %31 |
| OpStore %35 %58 |
| %37 = OpFunctionCall %6 %10 %35 |
| OpStore %22 %37 |
| %40 = OpIAdd %6 %58 %39 |
| OpStore %24 %40 |
| %43 = OpSLessThan %14 %40 %42 |
| OpLoopMerge %33 %31 None |
| OpBranchConditional %43 %31 %33 |
| %33 = OpLabel |
| %46 = OpIEqual %14 %37 %45 |
| OpSelectionMerge %48 None |
| OpBranchConditional %46 %47 %56 |
| %47 = OpLabel |
| OpStore %52 %55 |
| OpBranch %48 |
| %56 = OpLabel |
| OpStore %52 %57 |
| OpBranch %48 |
| %48 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| %10 = OpFunction %6 None %8 |
| %9 = OpFunctionParameter %7 |
| %11 = OpLabel |
| %12 = OpLoad %6 %9 |
| %15 = OpIEqual %14 %12 %13 |
| OpSelectionMerge %17 None |
| OpBranchConditional %15 %16 %17 |
| %16 = OpLabel |
| OpKill |
| %17 = OpLabel |
| %19 = OpLoad %6 %9 |
| OpReturnValue %19 |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| # zero |
| BUFFER variant_zero DATA_TYPE int32 DATA |
| 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_zero 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 |