#!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 GraphicsFuzz. # Short description: A fragment shader that covers a specific types optimization path. # The test passes because shader always writes red. # Optimized using spirv-opt with the following arguments: # '--eliminate-dead-branches' # '--merge-blocks' # '--scalar-replacement=100' # '--scalar-replacement=100' # '--inline-entry-points-exhaustive' # '--private-to-local' # '--eliminate-local-single-block' # '--eliminate-dead-branches' # '--if-conversion' # '--combine-access-chains' # '--eliminate-dead-branches' # '--redundancy-elimination' # '--simplify-instructions' # '--private-to-local' # '--private-to-local' # spirv-opt commit hash: 9215c1b7df0029f27807e8c8d7ec80532ce90a87 SHADER vertex variant_vertex_shader PASSTHROUGH # variant_fragment_shader is derived from the following GLSL: # #version 310 es # precision highp float; # precision highp int; # # layout(location = 0) out vec4 _GLF_color; # layout(set = 0, binding = 0) uniform buf0 # { # int one; # }; # # vec4 func() # { # return vec4(1, 0, 0, 1); # } # # void main() # { # _GLF_color = vec4(0); # # if(one == 0) // Always false. # return; # # _GLF_color = func(); # } SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 ; SPIR-V ; Version: 1.0 ; Generator: Khronos Glslang Reference Front End; 8 ; Bound: 35 ; Schema: 0 OpCapability Shader %1 = OpExtInstImport "GLSL.std.450" OpMemoryModel Logical GLSL450 OpEntryPoint Fragment %4 "main" %17 OpExecutionMode %4 OriginUpperLeft OpSource ESSL 310 OpName %4 "main" OpName %9 "func(" OpName %17 "_GLF_color" OpName %20 "buf0" OpMemberName %20 0 "one" OpName %22 "" OpDecorate %17 Location 0 OpMemberDecorate %20 0 Offset 0 OpDecorate %20 Block OpDecorate %22 DescriptorSet 0 OpDecorate %22 Binding 0 %2 = OpTypeVoid %3 = OpTypeFunction %2 %6 = OpTypeFloat 32 %7 = OpTypeVector %6 4 %8 = OpTypeFunction %7 %11 = OpConstant %6 1 %12 = OpConstant %6 0 %13 = OpConstantComposite %7 %11 %12 %12 %11 %16 = OpTypePointer Output %7 %17 = OpVariable %16 Output %18 = OpConstantComposite %7 %12 %12 %12 %12 %19 = OpTypeInt 32 1 %20 = OpTypeStruct %19 %21 = OpTypePointer Uniform %20 %22 = OpVariable %21 Uniform %23 = OpConstant %19 0 %24 = OpTypePointer Uniform %19 %27 = OpTypeBool %33 = OpTypePointer Function %7 %4 = OpFunction %2 None %3 %5 = OpLabel %34 = OpVariable %33 Function OpStore %17 %18 %25 = OpAccessChain %24 %22 %23 %26 = OpLoad %19 %25 %28 = OpIEqual %27 %26 %23 OpSelectionMerge %30 None OpBranchConditional %28 %29 %30 %29 = OpLabel OpReturn %30 = OpLabel OpStore %34 %13 OpStore %17 %13 OpReturn OpFunctionEnd %9 = OpFunction %7 None %8 %10 = OpLabel OpReturnValue %13 OpFunctionEnd END # uniforms for variant # one BUFFER variant_one DATA_TYPE int32 DATA 1 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_one 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