#!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' # '--inline-entry-points-exhaustive' # '--reduce-load-size' # '--eliminate-local-single-block' # '--vector-dce' # '--eliminate-dead-branches' # '--simplify-instructions' # '--inline-entry-points-exhaustive' # '--if-conversion' # '--redundancy-elimination' # '--eliminate-local-single-block' # '--vector-dce' # '--eliminate-dead-branches' # '--vector-dce' # '--if-conversion' # '--vector-dce' # '--combine-access-chains' # '--simplify-instructions' # '--eliminate-dead-code-aggressive' # '--inline-entry-points-exhaustive' # '--eliminate-dead-inserts' # '--eliminate-local-single-store' # '--ccp' # '--reduce-load-size' # '--eliminate-dead-branches' # '--merge-blocks' # '--if-conversion' # '--combine-access-chains' # '--copy-propagate-arrays' # '--eliminate-dead-branches' # '--merge-return' # '--inline-entry-points-exhaustive' # 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] # #define _float_1_0 _GLF_uniform_float_values[0] # #define _float_0_0 _GLF_uniform_float_values[1] # # precision highp float; # precision highp int; # # // Contents of _GLF_uniform_float_values: [1.0, 0.0] # layout(set = 0, binding = 0) uniform buf0 # { # float _GLF_uniform_float_values[2]; # }; # # // Contents of _GLF_uniform_int_values: [1, 0] # layout(set = 0, binding = 1) uniform buf1 # { # int _GLF_uniform_int_values[2]; # }; # # layout(location = 0) out vec4 _GLF_color; # # vec3 func() # { # int a = _int_1; # // b becomes one. # int b = int(max(ivec2(1, true ? a : _int_1), ivec2(1, true ? a : _int_1))); # // Returns vec3(1, 1, 1). # return vec3(max(_float_1_0, b == _int_1 ? _float_0_0 : _float_1_0)); # } # # void main() # { # // Always true. # if(func() == vec3(_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: 144 ; Schema: 0 OpCapability Shader %1 = OpExtInstImport "GLSL.std.450" OpMemoryModel Logical GLSL450 OpEntryPoint Fragment %4 "main" %86 OpExecutionMode %4 OriginUpperLeft OpSource ESSL 320 OpName %4 "main" OpName %17 "buf1" OpMemberName %17 0 "_GLF_uniform_int_values" OpName %19 "" OpName %50 "buf0" OpMemberName %50 0 "_GLF_uniform_float_values" OpName %52 "" OpName %86 "_GLF_color" OpDecorate %16 ArrayStride 16 OpMemberDecorate %17 0 Offset 0 OpDecorate %17 Block OpDecorate %19 DescriptorSet 0 OpDecorate %19 Binding 1 OpDecorate %49 ArrayStride 16 OpMemberDecorate %50 0 Offset 0 OpDecorate %50 Block OpDecorate %52 DescriptorSet 0 OpDecorate %52 Binding 0 OpDecorate %86 Location 0 %2 = OpTypeVoid %3 = OpTypeFunction %2 %6 = OpTypeFloat 32 %7 = OpTypeVector %6 3 %11 = OpTypeInt 32 1 %14 = OpTypeInt 32 0 %15 = OpConstant %14 2 %16 = OpTypeArray %11 %15 %17 = OpTypeStruct %16 %18 = OpTypePointer Uniform %17 %19 = OpVariable %18 Uniform %20 = OpConstant %11 0 %21 = OpTypePointer Uniform %11 %25 = OpConstant %11 1 %26 = OpTypeBool %36 = OpTypeVector %11 2 %49 = OpTypeArray %6 %15 %50 = OpTypeStruct %49 %51 = OpTypePointer Uniform %50 %52 = OpVariable %51 Uniform %53 = OpTypePointer Uniform %6 %60 = OpTypePointer Function %6 %79 = OpTypeVector %26 3 %84 = OpTypeVector %6 4 %85 = OpTypePointer Output %84 %86 = OpVariable %85 Output %143 = OpUndef %11 %4 = OpFunction %2 None %3 %5 = OpLabel %109 = OpVariable %60 Function %113 = OpAccessChain %21 %19 %20 %20 %114 = OpLoad %11 %113 %119 = OpCompositeConstruct %36 %25 %143 %125 = OpExtInst %36 %1 SMax %119 %119 %126 = OpCompositeExtract %11 %125 0 %127 = OpAccessChain %53 %52 %20 %20 %128 = OpLoad %6 %127 %132 = OpIEqual %26 %126 %114 OpSelectionMerge %139 None OpBranchConditional %132 %136 %133 %133 = OpLabel OpStore %109 %128 OpBranch %139 %136 = OpLabel %137 = OpAccessChain %53 %52 %20 %25 %138 = OpLoad %6 %137 OpStore %109 %138 OpBranch %139 %139 = OpLabel %140 = OpLoad %6 %109 %141 = OpExtInst %6 %1 FMax %128 %140 %142 = OpCompositeConstruct %7 %141 %141 %141 %77 = OpConvertSToF %6 %114 %78 = OpCompositeConstruct %7 %77 %77 %77 %80 = OpFOrdEqual %79 %142 %78 %81 = OpAll %26 %80 OpSelectionMerge %83 None OpBranchConditional %81 %82 %100 %100 = OpLabel %101 = OpAccessChain %21 %19 %20 %25 %102 = OpLoad %11 %101 %103 = OpConvertSToF %6 %102 %104 = OpCompositeConstruct %84 %103 %103 %103 %103 OpStore %86 %104 OpBranch %83 %82 = OpLabel %90 = OpAccessChain %21 %19 %20 %25 %91 = OpLoad %11 %90 %92 = OpConvertSToF %6 %91 %99 = OpCompositeConstruct %84 %77 %92 %92 %77 OpStore %86 %99 OpBranch %83 %83 = 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 # _GLF_uniform_float_values BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA 1.0 0.0 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 1 BIND BUFFER variant__GLF_uniform_float_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