#!amber # Copyright 2020 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: # '--simplify-instructions' # '--reduce-load-size' # '--inline-entry-points-exhaustive' # '--eliminate-local-single-block' # '--redundancy-elimination' # '--eliminate-dead-branches' # '--eliminate-dead-inserts' # '--redundancy-elimination' # '--eliminate-local-single-block' # '--eliminate-local-multi-store' # '--simplify-instructions' # '--eliminate-local-multi-store' # '--eliminate-dead-branches' # '--eliminate-dead-branches' # '--merge-return' # '--combine-access-chains' # '--eliminate-local-multi-store' # '--eliminate-local-single-block' # '--eliminate-local-single-store' # '--eliminate-dead-branches' # '--merge-blocks' # '--eliminate-dead-branches' # '--merge-blocks' # '--simplify-instructions' # '--eliminate-dead-branches' # '--merge-blocks' # '--eliminate-local-multi-store' # '--eliminate-dead-branches' # '--merge-return' # '--ccp' # '--eliminate-local-single-store' # '--redundancy-elimination' # '--eliminate-local-multi-store' # '--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 _float_1_0 _GLF_uniform_float_values[0] # # precision highp int; # precision highp float; # # // Contents of _GLF_uniform_float_values: 1.0 # layout(set = 0, binding = 0) uniform buf0 # { # float _GLF_uniform_float_values[1]; # }; # # // Contents of _GLF_uniform_int_values: [0, 1] # layout(set = 0, binding = 1) uniform buf1 # { # int _GLF_uniform_int_values[2]; # }; # # // Contents of zero: 0 # layout(set = 0, binding = 2) uniform buf2 # { # int zero; # }; # # layout(location = 0) out vec4 _GLF_color; # # void main() # { # vec3 v = vec3(_int_1); # // Static out of bound access required to hit the coverage point. # int a = 3; # # // Always false. # if(zero > _int_0) # { # // Out of bounds access but never executed. # v[a] = _float_1_0; # } # # _GLF_color = vec4(v[_int_1], _int_0, _int_0, _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: 66 ; Schema: 0 OpCapability Shader %1 = OpExtInstImport "GLSL.std.450" OpMemoryModel Logical GLSL450 OpEntryPoint Fragment %4 "main" %51 OpExecutionMode %4 OriginUpperLeft OpSource ESSL 320 OpName %4 "main" OpName %9 "v" OpName %14 "buf1" OpMemberName %14 0 "_GLF_uniform_int_values" OpName %16 "" OpName %27 "buf2" OpMemberName %27 0 "zero" OpName %29 "" OpName %41 "buf0" OpMemberName %41 0 "_GLF_uniform_float_values" OpName %43 "" OpName %51 "_GLF_color" OpDecorate %13 ArrayStride 16 OpMemberDecorate %14 0 Offset 0 OpDecorate %14 Block OpDecorate %16 DescriptorSet 0 OpDecorate %16 Binding 1 OpMemberDecorate %27 0 Offset 0 OpDecorate %27 Block OpDecorate %29 DescriptorSet 0 OpDecorate %29 Binding 2 OpDecorate %40 ArrayStride 16 OpMemberDecorate %41 0 Offset 0 OpDecorate %41 Block OpDecorate %43 DescriptorSet 0 OpDecorate %43 Binding 0 OpDecorate %51 Location 0 %2 = OpTypeVoid %3 = OpTypeFunction %2 %6 = OpTypeFloat 32 %7 = OpTypeVector %6 3 %8 = OpTypePointer Function %7 %10 = OpTypeInt 32 1 %11 = OpTypeInt 32 0 %12 = OpConstant %11 2 %13 = OpTypeArray %10 %12 %14 = OpTypeStruct %13 %15 = OpTypePointer Uniform %14 %16 = OpVariable %15 Uniform %17 = OpConstant %10 0 %18 = OpConstant %10 1 %19 = OpTypePointer Uniform %10 %26 = OpConstant %10 3 %27 = OpTypeStruct %10 %28 = OpTypePointer Uniform %27 %29 = OpVariable %28 Uniform %34 = OpTypeBool %39 = OpConstant %11 1 %40 = OpTypeArray %6 %39 %41 = OpTypeStruct %40 %42 = OpTypePointer Uniform %41 %43 = OpVariable %42 Uniform %44 = OpTypePointer Uniform %6 %47 = OpTypePointer Function %6 %49 = OpTypeVector %6 4 %50 = OpTypePointer Output %49 %51 = OpVariable %50 Output %4 = OpFunction %2 None %3 %5 = OpLabel %9 = OpVariable %8 Function %20 = OpAccessChain %19 %16 %17 %18 %21 = OpLoad %10 %20 %22 = OpConvertSToF %6 %21 %23 = OpCompositeConstruct %7 %22 %22 %22 OpStore %9 %23 %30 = OpAccessChain %19 %29 %17 %31 = OpLoad %10 %30 %32 = OpAccessChain %19 %16 %17 %17 %33 = OpLoad %10 %32 %35 = OpSGreaterThan %34 %31 %33 OpSelectionMerge %37 None OpBranchConditional %35 %36 %37 %36 = OpLabel %45 = OpAccessChain %44 %43 %17 %17 %46 = OpLoad %6 %45 %48 = OpAccessChain %47 %9 %26 OpStore %48 %46 OpBranch %37 %37 = OpLabel %54 = OpAccessChain %47 %9 %21 %55 = OpLoad %6 %54 %58 = OpConvertSToF %6 %33 %65 = OpCompositeConstruct %49 %55 %58 %58 %22 OpStore %51 %65 OpReturn OpFunctionEnd END # uniforms for variant # zero BUFFER variant_zero DATA_TYPE int32[] STD140 DATA 0 END # _GLF_uniform_int_values BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA 0 1 END # _GLF_uniform_float_values BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] 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_zero AS uniform DESCRIPTOR_SET 0 BINDING 2 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 256 256 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255