#!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: # '--if-conversion' # '--convert-local-access-chains' # '--eliminate-dead-branches' # '--merge-return' # '--eliminate-local-single-block' # '--simplify-instructions' # '--simplify-instructions' # '--combine-access-chains' # '--convert-local-access-chains' # '--eliminate-dead-branches' # '--ccp' # '--eliminate-local-single-block' # '--combine-access-chains' # '--private-to-local' # '--eliminate-dead-inserts' # '--redundancy-elimination' # '--scalar-replacement=100' # '--eliminate-dead-branches' # '--eliminate-local-multi-store' # '--if-conversion' # '--eliminate-dead-branches' # '--eliminate-local-single-block' # '--scalar-replacement=100' # '--private-to-local' # '--eliminate-dead-branches' # '--eliminate-local-single-block' # '--if-conversion' # '--redundancy-elimination' # 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_1 _GLF_uniform_int_values[0] # #define _int_0 _GLF_uniform_int_values[1] # # precision highp float; # precision highp int; # # // Contents of _GLF_uniform_int_values: [1, 0] # layout(set = 0, binding = 0) uniform buf0 # { # int _GLF_uniform_int_values[2]; # }; # # layout(location = 0) out vec4 _GLF_color; # # // This function always returns one. # int func() # { # // Always true. # if(unpackUnorm2x16(1u).y == 0.0) # { # return _int_1; # } # else # { # return _int_0; # } # } # # void main() # { # // Always true. # if(func() == _int_1) # { # _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: 75 ; Schema: 0 OpCapability Shader %1 = OpExtInstImport "GLSL.std.450" OpMemoryModel Logical GLSL450 OpEntryPoint Fragment %4 "main" %45 OpExecutionMode %4 OriginUpperLeft OpSource ESSL 320 OpName %4 "main" OpName %8 "func(" OpName %23 "buf0" OpMemberName %23 0 "_GLF_uniform_int_values" OpName %25 "" OpName %45 "_GLF_color" OpDecorate %22 ArrayStride 16 OpMemberDecorate %23 0 Offset 0 OpDecorate %23 Block OpDecorate %25 DescriptorSet 0 OpDecorate %25 Binding 0 OpDecorate %45 Location 0 %2 = OpTypeVoid %3 = OpTypeFunction %2 %6 = OpTypeInt 32 1 %7 = OpTypeFunction %6 %10 = OpTypeInt 32 0 %11 = OpConstant %10 1 %12 = OpTypeFloat 32 %13 = OpTypeVector %12 2 %16 = OpConstant %12 0 %17 = OpTypeBool %21 = OpConstant %10 2 %22 = OpTypeArray %6 %21 %23 = OpTypeStruct %22 %24 = OpTypePointer Uniform %23 %25 = OpVariable %24 Uniform %26 = OpConstant %6 0 %27 = OpTypePointer Uniform %6 %32 = OpConstant %6 1 %43 = OpTypeVector %12 4 %44 = OpTypePointer Output %43 %45 = OpVariable %44 Output %65 = OpTypePointer Function %6 %69 = OpConstant %10 0 %70 = OpConstantFalse %17 %71 = OpTypePointer Function %17 %73 = OpConstantTrue %17 %4 = OpFunction %2 None %3 %5 = OpLabel %37 = OpFunctionCall %6 %8 %38 = OpAccessChain %27 %25 %26 %26 %39 = OpLoad %6 %38 %40 = OpIEqual %17 %37 %39 OpSelectionMerge %42 None OpBranchConditional %40 %41 %59 %59 = OpLabel %60 = OpAccessChain %27 %25 %26 %32 %61 = OpLoad %6 %60 %62 = OpConvertSToF %12 %61 %63 = OpCompositeConstruct %43 %62 %62 %62 %62 OpStore %45 %63 OpBranch %42 %41 = OpLabel %48 = OpConvertSToF %12 %39 %49 = OpAccessChain %27 %25 %26 %32 %50 = OpLoad %6 %49 %51 = OpConvertSToF %12 %50 %58 = OpCompositeConstruct %43 %48 %51 %51 %48 OpStore %45 %58 OpBranch %42 %42 = OpLabel OpReturn OpFunctionEnd %8 = OpFunction %6 None %7 %9 = OpLabel %72 = OpVariable %71 Function %70 %66 = OpVariable %65 Function OpSelectionMerge %64 None OpSwitch %69 %68 %68 = OpLabel %14 = OpExtInst %13 %1 UnpackUnorm2x16 %11 %15 = OpCompositeExtract %12 %14 1 %18 = OpFOrdEqual %17 %15 %16 OpSelectionMerge %20 None OpBranchConditional %18 %19 %31 %31 = OpLabel %33 = OpAccessChain %27 %25 %26 %32 %34 = OpLoad %6 %33 OpStore %72 %73 OpStore %66 %34 OpBranch %64 %19 = OpLabel %28 = OpAccessChain %27 %25 %26 %26 %29 = OpLoad %6 %28 OpStore %72 %73 OpStore %66 %29 OpBranch %64 %20 = OpLabel OpUnreachable %64 = OpLabel %74 = OpPhi %6 %34 %31 %29 %19 OpReturnValue %74 OpFunctionEnd END # uniforms for variant # _GLF_uniform_int_values BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 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__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