#!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 NIR code paths # The test passes because the shader always writes red. # Optimized using spirv-opt with the following arguments: # '--reduce-load-size' # '--if-conversion' # '--if-conversion' # '--combine-access-chains' # '--eliminate-dead-branches' # '--merge-return' # '--eliminate-dead-branches' # '--merge-blocks' # '--if-conversion' # '--eliminate-local-single-store' # '--redundancy-elimination' # '--private-to-local' # '--combine-access-chains' # '--ccp' # '--eliminate-local-multi-store' # '--if-conversion' # '--convert-local-access-chains' # '--combine-access-chains' # '--reduce-load-size' # '--ccp' # '--eliminate-dead-inserts' # '--simplify-instructions' # '--eliminate-dead-code-aggressive' # 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_0 _GLF_uniform_int_values[0] # #define _int_1 _GLF_uniform_int_values[1] # #define _int_2 _GLF_uniform_int_values[2] # #define _float_1_0 _GLF_uniform_float_values[0] # #define _float_0_0 _GLF_uniform_float_values[1] # # precision highp int; # precision highp float; # # // Contents of _GLF_uniform_int_values: [0, 1, 2] # layout(set = 0, binding = 0) uniform buf0 # { # int _GLF_uniform_int_values[3]; # }; # // Contents of _GLF_uniform_float_values: [1.0, 0.0] # layout(set = 0, binding = 1) uniform buf1 # { # float _GLF_uniform_float_values[2]; # }; # # layout(location = 0) out vec4 _GLF_color; # # void main() # { # mat3x2 m32 = mat3x2(_float_1_0); # int a = 3; # # // Always false. # if (_int_0 == 1) # { # // Indexing past the matrix elements, but this # // code is never executed and the values are not # // used for the final results. # m32[a][_int_0] = _float_1_0; # } # # float sums[3] = float[3](_float_1_0, _float_1_0, _float_1_0); # # for(int c = _int_0; c < _int_2; c ++) # { # // This value is still unused later. # sums[_int_2] += m32[c][_int_0]; # } # # // This only depends on the initialized constant values. # _GLF_color = vec4(sums[_int_0], _float_0_0, _float_0_0, sums[_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: 105 ; Schema: 0 OpCapability Shader %1 = OpExtInstImport "GLSL.std.450" OpMemoryModel Logical GLSL450 OpEntryPoint Fragment %4 "main" %89 OpExecutionMode %4 OriginUpperLeft OpSource ESSL 320 OpName %4 "main" OpName %10 "m32" OpName %14 "buf1" OpMemberName %14 0 "_GLF_uniform_float_values" OpName %16 "" OpName %33 "buf0" OpMemberName %33 0 "_GLF_uniform_int_values" OpName %35 "" OpName %53 "sums" OpName %89 "_GLF_color" OpDecorate %13 ArrayStride 16 OpMemberDecorate %14 0 Offset 0 OpDecorate %14 Block OpDecorate %16 DescriptorSet 0 OpDecorate %16 Binding 1 OpDecorate %32 ArrayStride 16 OpMemberDecorate %33 0 Offset 0 OpDecorate %33 Block OpDecorate %35 DescriptorSet 0 OpDecorate %35 Binding 0 OpDecorate %89 Location 0 %2 = OpTypeVoid %3 = OpTypeFunction %2 %6 = OpTypeFloat 32 %7 = OpTypeVector %6 2 %8 = OpTypeMatrix %7 3 %9 = OpTypePointer Function %8 %11 = OpTypeInt 32 0 %12 = OpConstant %11 2 %13 = OpTypeArray %6 %12 %14 = OpTypeStruct %13 %15 = OpTypePointer Uniform %14 %16 = OpVariable %15 Uniform %17 = OpTypeInt 32 1 %18 = OpConstant %17 0 %19 = OpTypePointer Uniform %6 %23 = OpConstant %6 0 %30 = OpConstant %17 3 %31 = OpConstant %11 3 %32 = OpTypeArray %17 %31 %33 = OpTypeStruct %32 %34 = OpTypePointer Uniform %33 %35 = OpVariable %34 Uniform %36 = OpTypePointer Uniform %17 %39 = OpConstant %17 1 %40 = OpTypeBool %49 = OpTypePointer Function %6 %51 = OpTypeArray %6 %31 %52 = OpTypePointer Function %51 %70 = OpConstant %17 2 %87 = OpTypeVector %6 4 %88 = OpTypePointer Output %87 %89 = OpVariable %88 Output %103 = OpConstantComposite %7 %23 %23 %4 = OpFunction %2 None %3 %5 = OpLabel %10 = OpVariable %9 Function %53 = OpVariable %52 Function %20 = OpAccessChain %19 %16 %18 %18 %21 = OpLoad %6 %20 %24 = OpCompositeConstruct %7 %21 %23 %25 = OpCompositeConstruct %7 %23 %21 %27 = OpCompositeConstruct %8 %24 %25 %103 OpStore %10 %27 %37 = OpAccessChain %36 %35 %18 %18 %38 = OpLoad %17 %37 %41 = OpIEqual %40 %38 %39 OpSelectionMerge %43 None OpBranchConditional %41 %42 %43 %42 = OpLabel %50 = OpAccessChain %49 %10 %30 %38 OpStore %50 %21 OpBranch %43 %43 = OpLabel %60 = OpCompositeConstruct %51 %21 %21 %21 OpStore %53 %60 OpBranch %64 %64 = OpLabel %104 = OpPhi %17 %38 %43 %86 %65 %71 = OpAccessChain %36 %35 %18 %70 %72 = OpLoad %17 %71 %73 = OpSLessThan %40 %104 %72 OpLoopMerge %66 %65 None OpBranchConditional %73 %65 %66 %65 = OpLabel %79 = OpAccessChain %49 %10 %104 %38 %80 = OpLoad %6 %79 %81 = OpAccessChain %49 %53 %72 %82 = OpLoad %6 %81 %83 = OpFAdd %6 %82 %80 OpStore %81 %83 %86 = OpIAdd %17 %104 %39 OpBranch %64 %66 = OpLabel %92 = OpAccessChain %49 %53 %38 %93 = OpLoad %6 %92 %94 = OpAccessChain %19 %16 %18 %39 %95 = OpLoad %6 %94 %98 = OpAccessChain %36 %35 %18 %39 %99 = OpLoad %17 %98 %100 = OpAccessChain %49 %53 %99 %101 = OpLoad %6 %100 %102 = OpCompositeConstruct %87 %93 %95 %95 %101 OpStore %89 %102 OpReturn OpFunctionEnd END # uniforms for variant # _GLF_uniform_float_values BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA 1.0 0.0 END # _GLF_uniform_int_values BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA 0 1 2 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_float_values AS uniform DESCRIPTOR_SET 0 BINDING 1 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