| #!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 discard keyword and a return |
| |
| # The test passes because main always writes the color red; the discard statement is unreachable. |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--eliminate-dead-branches' |
| # '--merge-return' |
| # '--eliminate-dead-branches' |
| # '--merge-blocks' |
| # spirv-opt commit hash: 230c9e437146e48ec58adb4433890403c23c98fa |
| |
| |
| |
| 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; |
| # layout(set = 0, binding = 0) uniform buf0 |
| # { |
| # vec2 injectionSwitch; |
| # }; |
| # |
| # vec3 computePoint() |
| # { |
| # if (injectionSwitch.x > injectionSwitch.y) // always false |
| # { |
| # discard; |
| # return vec3(1.0); |
| # } |
| # } |
| # void main() |
| # { |
| # |
| # computePoint(); |
| # if (false) |
| # { |
| # } |
| # if (gl_FragCoord.x < 0.0) |
| # { |
| # return; |
| # } |
| # computePoint(); |
| # |
| # _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: 60 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %40 %51 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %9 "computePoint(" |
| OpName %12 "buf0" |
| OpMemberName %12 0 "injectionSwitch" |
| OpName %14 "" |
| OpName %40 "gl_FragCoord" |
| OpName %51 "_GLF_color" |
| OpMemberDecorate %12 0 Offset 0 |
| OpDecorate %12 Block |
| OpDecorate %14 DescriptorSet 0 |
| OpDecorate %14 Binding 0 |
| OpDecorate %40 BuiltIn FragCoord |
| OpDecorate %51 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeVector %6 3 |
| %8 = OpTypeFunction %7 |
| %11 = OpTypeVector %6 2 |
| %12 = OpTypeStruct %11 |
| %13 = OpTypePointer Uniform %12 |
| %14 = OpVariable %13 Uniform |
| %15 = OpTypeInt 32 1 |
| %16 = OpConstant %15 0 |
| %17 = OpTypeInt 32 0 |
| %18 = OpConstant %17 0 |
| %19 = OpTypePointer Uniform %6 |
| %22 = OpConstant %17 1 |
| %25 = OpTypeBool |
| %30 = OpConstant %6 1 |
| %31 = OpConstantComposite %7 %30 %30 %30 |
| %35 = OpConstantFalse %25 |
| %38 = OpTypeVector %6 4 |
| %39 = OpTypePointer Input %38 |
| %40 = OpVariable %39 Input |
| %41 = OpTypePointer Input %6 |
| %44 = OpConstant %6 0 |
| %50 = OpTypePointer Output %38 |
| %51 = OpVariable %50 Output |
| %52 = OpConstantComposite %38 %30 %44 %44 %30 |
| %57 = OpTypePointer Function %25 |
| %59 = OpConstantTrue %25 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %58 = OpVariable %57 Function %35 |
| OpBranch %54 |
| %54 = OpLabel |
| %34 = OpFunctionCall %7 %9 |
| OpLoopMerge %53 %56 None |
| OpBranch %37 |
| %37 = OpLabel |
| %42 = OpAccessChain %41 %40 %18 |
| %43 = OpLoad %6 %42 |
| %45 = OpFOrdLessThan %25 %43 %44 |
| OpSelectionMerge %47 None |
| OpBranchConditional %45 %46 %47 |
| %46 = OpLabel |
| OpStore %58 %59 |
| OpBranch %53 |
| %47 = OpLabel |
| %49 = OpFunctionCall %7 %9 |
| OpStore %51 %52 |
| OpStore %58 %59 |
| OpBranch %53 |
| %56 = OpLabel |
| OpBranch %54 |
| %53 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| %9 = OpFunction %7 None %8 |
| %10 = OpLabel |
| %20 = OpAccessChain %19 %14 %16 %18 |
| %21 = OpLoad %6 %20 |
| %23 = OpAccessChain %19 %14 %16 %22 |
| %24 = OpLoad %6 %23 |
| %26 = OpFOrdGreaterThan %25 %21 %24 |
| OpSelectionMerge %28 None |
| OpBranchConditional %26 %27 %28 |
| %27 = OpLabel |
| OpKill |
| %28 = OpLabel |
| %33 = OpUndef %7 |
| OpReturnValue %33 |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| # injectionSwitch |
| BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA |
| 0.0 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_injectionSwitch 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 |