| #!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 always false if in switch statement |
| |
| # The test passes because the shader always writes the color red |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--private-to-local' |
| # '--eliminate-local-multi-store' |
| # '--simplify-instructions' |
| # '--eliminate-dead-inserts' |
| # spirv-opt commit hash: 4a00a80c40484a6f6f72f48c9d34943cf8f180d4 |
| |
| |
| |
| 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() |
| # { |
| # switch (0) |
| # { |
| # case 0: |
| # if (false) |
| # { |
| # } |
| # } |
| # |
| # _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 7 |
| ; Bound: 22 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %18 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %18 "_GLF_color" |
| OpDecorate %18 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeInt 32 1 |
| %7 = OpConstant %6 0 |
| %10 = OpTypeBool |
| %11 = OpConstantFalse %10 |
| %15 = OpTypeFloat 32 |
| %16 = OpTypeVector %15 4 |
| %17 = OpTypePointer Output %16 |
| %18 = OpVariable %17 Output |
| %19 = OpConstant %15 1 |
| %20 = OpConstant %15 0 |
| %21 = OpConstantComposite %16 %19 %20 %20 %19 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| OpSelectionMerge %9 None |
| OpSwitch %7 %9 0 %8 |
| %8 = OpLabel |
| OpSelectionMerge %13 None |
| OpBranchConditional %11 %12 %13 |
| %12 = OpLabel |
| OpBranch %13 |
| %13 = OpLabel |
| OpBranch %9 |
| %9 = OpLabel |
| OpStore %18 %21 |
| 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 |