| #!amber |
| |
| # Copyright 2019 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 bug found by GraphicsFuzz. |
| |
| # Short description: A fragment shader with unreachable discard statement |
| |
| # The test passes because the shader always writes the color red. The discard statement is never reached. |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--scalar-replacement=100' |
| # '--private-to-local' |
| # '--eliminate-dead-branches' |
| # '--merge-return' |
| # '--eliminate-dead-branches' |
| # '--private-to-local' |
| # '--copy-propagate-arrays' |
| # '--scalar-replacement=100' |
| # '--combine-access-chains' |
| # '--vector-dce' |
| # '--convert-local-access-chains' |
| # '--if-conversion' |
| # '--eliminate-dead-branches' |
| # '--merge-return' |
| # '--ccp' |
| # '--eliminate-dead-branches' |
| # '--eliminate-dead-branches' |
| # '--merge-blocks' |
| # '--combine-access-chains' |
| # '--eliminate-local-single-block' |
| # '--copy-propagate-arrays' |
| # '--ccp' |
| # '--private-to-local' |
| # '--private-to-local' |
| # spirv-opt commit hash: 06407250a169c6a03b3765e86619075af1a8c187 |
| |
| |
| |
| SHADER vertex variant_vertex_shader PASSTHROUGH |
| |
| # variant_fragment_shader is derived from the following GLSL: |
| # #version 310 es |
| # precision highp float; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # vec3 mand() |
| # { |
| # for (int k = 0; k < 1000; k++) |
| # return vec3(1.0); |
| # |
| # discard; // This statement is never reached |
| # return vec3(1.0); |
| # } |
| # |
| # void main() |
| # { |
| # _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); |
| # |
| # for (int i = 0; i < 4; i++) |
| # mand(); |
| # |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 7 |
| ; Bound: 63 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %35 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %9 "mand(" |
| OpName %13 "k" |
| OpName %35 "_GLF_color" |
| OpName %38 "i" |
| OpDecorate %13 RelaxedPrecision |
| OpDecorate %20 RelaxedPrecision |
| OpDecorate %35 Location 0 |
| OpDecorate %38 RelaxedPrecision |
| OpDecorate %44 RelaxedPrecision |
| OpDecorate %48 RelaxedPrecision |
| OpDecorate %49 RelaxedPrecision |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeVector %6 3 |
| %8 = OpTypeFunction %7 |
| %11 = OpTypeInt 32 1 |
| %12 = OpTypePointer Function %11 |
| %14 = OpConstant %11 0 |
| %21 = OpConstant %11 1000 |
| %22 = OpTypeBool |
| %24 = OpConstant %6 1 |
| %25 = OpConstantComposite %7 %24 %24 %24 |
| %28 = OpConstant %11 1 |
| %33 = OpTypeVector %6 4 |
| %34 = OpTypePointer Output %33 |
| %35 = OpVariable %34 Output |
| %36 = OpConstant %6 0 |
| %37 = OpConstantComposite %33 %24 %36 %36 %24 |
| %45 = OpConstant %11 4 |
| %51 = OpTypePointer Function %7 |
| %57 = OpConstantFalse %22 |
| %58 = OpTypePointer Function %22 |
| %60 = OpConstantTrue %22 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %38 = OpVariable %12 Function |
| OpStore %35 %37 |
| OpStore %38 %14 |
| OpBranch %39 |
| %39 = OpLabel |
| %44 = OpLoad %11 %38 |
| %46 = OpSLessThan %22 %44 %45 |
| OpLoopMerge %41 %40 None |
| OpBranchConditional %46 %40 %41 |
| %40 = OpLabel |
| %47 = OpFunctionCall %7 %9 |
| %48 = OpLoad %11 %38 |
| %49 = OpIAdd %11 %48 %28 |
| OpStore %38 %49 |
| OpBranch %39 |
| %41 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| %9 = OpFunction %7 None %8 |
| %10 = OpLabel |
| %59 = OpVariable %58 Function %57 |
| %52 = OpVariable %51 Function |
| %13 = OpVariable %12 Function |
| OpBranch %54 |
| %54 = OpLabel |
| OpStore %13 %14 |
| OpLoopMerge %50 %56 None |
| OpBranch %15 |
| %15 = OpLabel |
| %20 = OpLoad %11 %13 |
| %23 = OpSLessThan %22 %20 %21 |
| OpLoopMerge %17 %18 None |
| OpBranchConditional %23 %16 %17 |
| %16 = OpLabel |
| OpStore %59 %60 |
| OpStore %52 %25 |
| OpBranch %17 |
| %18 = OpLabel |
| OpBranch %15 |
| %17 = OpLabel |
| %62 = OpLoad %22 %59 |
| OpSelectionMerge %61 None |
| OpBranchConditional %62 %50 %61 |
| %61 = OpLabel |
| OpKill |
| %56 = OpLabel |
| OpBranch %54 |
| %50 = OpLabel |
| %53 = OpLoad %7 %52 |
| OpReturnValue %53 |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| |
| 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 |
| 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 |