#!amber # Copyright 2021 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 the GraphicsFuzz project. # Short description: A fragment shader that covers specific LLVM code paths # The test passes because the shader always writes red. # Optimized using spirv-opt with the following arguments: # '--eliminate-local-multi-store' # '--eliminate-dead-branches' # '--merge-blocks' # '--simplify-instructions' # '--eliminate-dead-branches' # '--reduce-load-size' # '--convert-local-access-chains' # '--eliminate-dead-branches' # '--if-conversion' # '--simplify-instructions' # '--ccp' # '--vector-dce' # '--vector-dce' # '--eliminate-dead-code-aggressive' # '--redundancy-elimination' # '--eliminate-local-multi-store' # '--eliminate-dead-branches' # '--eliminate-local-single-store' # '--private-to-local' # '--eliminate-dead-branches' # '--eliminate-dead-branches' # '--merge-blocks' # '--eliminate-dead-branches' # '--merge-blocks' # spirv-opt commit hash: a0370efd589be33d5d9a85cfde2f85841b3755af SHADER vertex variant_vertex_shader PASSTHROUGH # variant_fragment_shader is derived from the following GLSL: # #version 320 es # #define _int_5 _GLF_uniform_int_values[0] # #define _int_4 _GLF_uniform_int_values[1] # #define _int_1 _GLF_uniform_int_values[2] # #define _int_0 _GLF_uniform_int_values[3] # # precision highp float; # precision highp int; # # // Contents of _GLF_uniform_int_values: [5, 4, 1, 0] # layout(set = 0, binding = 0) uniform buf0 # { # int _GLF_uniform_int_values[4]; # }; # # struct S # { # int i; # }; # # layout(location = 0) out vec4 _GLF_color; # # void main() # { # int a = _int_1; # # for(S s = S(0); s.i < _int_5; s.i++) # { # if(a > 3) # { # break; # } # a++; # } # # if(a == _int_4) # { # _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1); # } # else # { # _GLF_color = vec4(_int_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: 82 ; Schema: 0 OpCapability Shader %1 = OpExtInstImport "GLSL.std.450" OpMemoryModel Logical GLSL450 OpEntryPoint Fragment %4 "main" %56 OpExecutionMode %4 OriginUpperLeft OpSource ESSL 320 OpName %4 "main" OpName %12 "buf0" OpMemberName %12 0 "_GLF_uniform_int_values" OpName %14 "" OpName %20 "S" OpMemberName %20 0 "i" OpName %22 "s" OpName %56 "_GLF_color" OpDecorate %11 ArrayStride 16 OpMemberDecorate %12 0 Offset 0 OpDecorate %12 Block OpDecorate %14 DescriptorSet 0 OpDecorate %14 Binding 0 OpDecorate %56 Location 0 %2 = OpTypeVoid %3 = OpTypeFunction %2 %6 = OpTypeInt 32 1 %9 = OpTypeInt 32 0 %10 = OpConstant %9 4 %11 = OpTypeArray %6 %10 %12 = OpTypeStruct %11 %13 = OpTypePointer Uniform %12 %14 = OpVariable %13 Uniform %15 = OpConstant %6 0 %16 = OpConstant %6 2 %17 = OpTypePointer Uniform %6 %20 = OpTypeStruct %6 %21 = OpTypePointer Function %20 %23 = OpConstantComposite %20 %15 %33 = OpTypeBool %36 = OpConstant %6 3 %42 = OpConstant %6 1 %53 = OpTypeFloat 32 %54 = OpTypeVector %53 4 %55 = OpTypePointer Output %54 %56 = OpVariable %55 Output %4 = OpFunction %2 None %3 %5 = OpLabel %22 = OpVariable %21 Function %18 = OpAccessChain %17 %14 %15 %16 %19 = OpLoad %6 %18 OpStore %22 %23 OpBranch %24 %24 = OpLabel %81 = OpPhi %20 %23 %5 %80 %27 %75 = OpPhi %6 %19 %5 %43 %27 %30 = OpCompositeExtract %6 %81 0 %31 = OpAccessChain %17 %14 %15 %15 %32 = OpLoad %6 %31 %34 = OpSLessThan %33 %30 %32 OpLoopMerge %26 %27 None OpBranchConditional %34 %25 %26 %25 = OpLabel %37 = OpSGreaterThan %33 %75 %36 OpSelectionMerge %39 None OpBranchConditional %37 %38 %39 %38 = OpLabel OpBranch %26 %39 = OpLabel %43 = OpIAdd %6 %75 %42 OpBranch %27 %27 = OpLabel %45 = OpCompositeExtract %6 %81 0 %46 = OpIAdd %6 %45 %42 %80 = OpCompositeInsert %20 %46 %81 0 OpStore %22 %80 OpBranch %24 %26 = OpLabel %48 = OpAccessChain %17 %14 %15 %42 %49 = OpLoad %6 %48 %50 = OpIEqual %33 %75 %49 OpSelectionMerge %52 None OpBranchConditional %50 %51 %70 %51 = OpLabel %59 = OpConvertSToF %53 %19 %60 = OpAccessChain %17 %14 %15 %36 %61 = OpLoad %6 %60 %62 = OpConvertSToF %53 %61 %69 = OpCompositeConstruct %54 %59 %62 %62 %59 OpStore %56 %69 OpBranch %52 %70 = OpLabel %71 = OpAccessChain %17 %14 %15 %36 %72 = OpLoad %6 %71 %73 = OpConvertSToF %53 %72 %74 = OpCompositeConstruct %54 %73 %73 %73 %73 OpStore %56 %74 OpBranch %52 %52 = OpLabel OpReturn OpFunctionEnd END # uniforms for variant # _GLF_uniform_int_values BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA 5 4 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__GLF_uniform_int_values 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