#!amber # Copyright 2022 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-dead-branches' # '--merge-blocks' # '--eliminate-dead-code-aggressive' # '--convert-local-access-chains' # '--eliminate-dead-branches' # '--merge-blocks' # '--eliminate-local-multi-store' # '--reduce-load-size' # '--convert-local-access-chains' # '--eliminate-local-multi-store' # '--combine-access-chains' # '--vector-dce' # '--scalar-replacement=100' # '--eliminate-dead-branches' # '--merge-blocks' # '--copy-propagate-arrays' # '--eliminate-dead-branches' # '--scalar-replacement=100' # '--eliminate-dead-branches' # '--merge-blocks' # '--vector-dce' # '--convert-local-access-chains' # '--combine-access-chains' # '--redundancy-elimination' # '--inline-entry-points-exhaustive' # '--combine-access-chains' # '--eliminate-dead-branches' # '--eliminate-local-multi-store' # 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 int; # precision highp float; # # // 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; # # void func(int x) # { # // Always false. # if(x > _int_1) # { # return; # } # # ivec2 a = ivec2(_int_1); # // b = 1 & ((~0 | ~0) >> 1) = 1 & (~0 >> 1) = 1 & ~0 = 1 # int b = _int_1 & (((a.x != _int_1 ? 0 : ~ 0) | (a.x != _int_1 ? 0 : ~ 0)) >> _int_1); # # // Always true. # if(b == _int_1) # { # _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1); # } # else # { # _GLF_color = vec4(_int_0); # } # } # # void main() # { # func(_int_1); # } SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 ; SPIR-V ; Version: 1.0 ; Generator: Khronos Glslang Reference Front End; 10 ; Bound: 91 ; Schema: 0 OpCapability Shader %1 = OpExtInstImport "GLSL.std.450" OpMemoryModel Logical GLSL450 OpEntryPoint Fragment %4 "main" %65 OpExecutionMode %4 OriginUpperLeft OpSource ESSL 320 OpName %4 "main" OpName %10 "func(i1;" OpName %9 "x" OpName %16 "buf0" OpMemberName %16 0 "_GLF_uniform_int_values" OpName %18 "" OpName %30 "a" OpName %34 "b" OpName %65 "_GLF_color" OpName %85 "param" OpDecorate %15 ArrayStride 16 OpMemberDecorate %16 0 Offset 0 OpDecorate %16 Block OpDecorate %18 DescriptorSet 0 OpDecorate %18 Binding 0 OpDecorate %65 Location 0 %2 = OpTypeVoid %3 = OpTypeFunction %2 %6 = OpTypeInt 32 1 %7 = OpTypePointer Function %6 %8 = OpTypeFunction %2 %7 %13 = OpTypeInt 32 0 %14 = OpConstant %13 2 %15 = OpTypeArray %6 %14 %16 = OpTypeStruct %15 %17 = OpTypePointer Uniform %16 %18 = OpVariable %17 Uniform %19 = OpConstant %6 0 %20 = OpTypePointer Uniform %6 %23 = OpTypeBool %28 = OpTypeVector %6 2 %29 = OpTypePointer Function %28 %37 = OpConstant %13 0 %43 = OpConstant %6 -1 %62 = OpTypeFloat 32 %63 = OpTypeVector %62 4 %64 = OpTypePointer Output %63 %65 = OpVariable %64 Output %69 = OpConstant %6 1 %4 = OpFunction %2 None %3 %5 = OpLabel %85 = OpVariable %7 Function %86 = OpAccessChain %20 %18 %19 %19 %87 = OpLoad %6 %86 OpStore %85 %87 %88 = OpFunctionCall %2 %10 %85 OpReturn OpFunctionEnd %10 = OpFunction %2 None %8 %9 = OpFunctionParameter %7 %11 = OpLabel %30 = OpVariable %29 Function %34 = OpVariable %7 Function %12 = OpLoad %6 %9 %21 = OpAccessChain %20 %18 %19 %19 %22 = OpLoad %6 %21 %24 = OpSGreaterThan %23 %12 %22 OpSelectionMerge %26 None OpBranchConditional %24 %25 %26 %25 = OpLabel OpReturn %26 = OpLabel %33 = OpCompositeConstruct %28 %22 %22 OpStore %30 %33 %38 = OpAccessChain %7 %30 %37 %89 = OpLoad %28 %30 %39 = OpCompositeExtract %6 %89 0 %42 = OpINotEqual %23 %39 %22 %44 = OpSelect %6 %42 %19 %43 %90 = OpLoad %28 %30 %46 = OpCompositeExtract %6 %90 0 %49 = OpINotEqual %23 %46 %22 %50 = OpSelect %6 %49 %19 %43 %51 = OpBitwiseOr %6 %44 %50 %54 = OpShiftRightArithmetic %6 %51 %22 %55 = OpBitwiseAnd %6 %22 %54 OpStore %34 %55 %59 = OpIEqual %23 %55 %22 OpSelectionMerge %61 None OpBranchConditional %59 %60 %80 %60 = OpLabel %68 = OpConvertSToF %62 %22 %70 = OpAccessChain %20 %18 %19 %69 %71 = OpLoad %6 %70 %72 = OpConvertSToF %62 %71 %79 = OpCompositeConstruct %63 %68 %72 %72 %68 OpStore %65 %79 OpBranch %61 %80 = OpLabel %81 = OpAccessChain %20 %18 %19 %69 %82 = OpLoad %6 %81 %83 = OpConvertSToF %62 %82 %84 = OpCompositeConstruct %63 %83 %83 %83 %83 OpStore %65 %84 OpBranch %61 %61 = OpLabel OpReturn 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 32 32 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 32 32 EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255