| #!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 an unreachable return in a loop |
| |
| # The test passes because main always writes the color red. |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--simplify-instructions' |
| # '--eliminate-local-single-store' |
| # '--simplify-instructions' |
| # '--inline-entry-points-exhaustive' |
| # '--reduce-load-size' |
| # '--eliminate-dead-branches' |
| # '--merge-return' |
| # '--inline-entry-points-exhaustive' |
| # '--private-to-local' |
| # '--eliminate-dead-branches' |
| # '--merge-return' |
| # '--copy-propagate-arrays' |
| # '--convert-local-access-chains' |
| # '--eliminate-dead-branches' |
| # '--merge-return' |
| # '--eliminate-local-single-store' |
| # '--copy-propagate-arrays' |
| # '--scalar-replacement=100' |
| # '--eliminate-dead-branches' |
| # '--merge-blocks' |
| # '--eliminate-dead-branches' |
| # '--if-conversion' |
| # '--copy-propagate-arrays' |
| # '--reduce-load-size' |
| # '--eliminate-local-multi-store' |
| # '--eliminate-dead-code-aggressive' |
| # '--convert-local-access-chains' |
| # '--private-to-local' |
| # '--if-conversion' |
| # spirv-opt commit hash: ad7f2c5c4c7f51360e9e079109a9217aa5ba5cc0 |
| |
| |
| |
| 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; |
| # |
| # void main() |
| # { |
| # for(int i = 1; i < 0; i++) |
| # return; |
| # |
| # _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 7 |
| ; Bound: 43 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %25 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %25 "_GLF_color" |
| OpDecorate %25 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeInt 32 1 |
| %9 = OpConstant %6 1 |
| %16 = OpConstant %6 0 |
| %17 = OpTypeBool |
| %22 = OpTypeFloat 32 |
| %23 = OpTypeVector %22 4 |
| %24 = OpTypePointer Output %23 |
| %25 = OpVariable %24 Output |
| %26 = OpConstant %22 1 |
| %27 = OpConstant %22 0 |
| %28 = OpConstantComposite %23 %26 %27 %27 %26 |
| %33 = OpConstantFalse %17 |
| %36 = OpConstantTrue %17 |
| %42 = OpUndef %17 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| OpBranch %30 |
| %30 = OpLabel |
| %41 = OpPhi %17 %33 %5 %42 %32 |
| OpLoopMerge %29 %32 None |
| OpBranch %10 |
| %10 = OpLabel |
| %40 = OpPhi %17 %41 %30 %42 %13 |
| %18 = OpSLessThan %17 %9 %16 |
| OpLoopMerge %12 %13 None |
| OpBranchConditional %18 %11 %12 |
| %11 = OpLabel |
| OpBranch %12 |
| %13 = OpLabel |
| OpBranch %10 |
| %12 = OpLabel |
| %39 = OpPhi %17 %40 %10 %36 %11 |
| OpSelectionMerge %37 None |
| OpBranchConditional %39 %29 %37 |
| %37 = OpLabel |
| OpStore %25 %28 |
| OpBranch %29 |
| %32 = OpLabel |
| OpBranch %30 |
| %29 = OpLabel |
| OpReturn |
| 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 |