| #!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 bug found by GraphicsFuzz. |
| |
| # Short description: A fragment shader with switch cases that fall through |
| |
| # The test passes because shader always writes red. |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--ccp' |
| # '--eliminate-local-single-block' |
| # '--combine-access-chains' |
| # '--copy-propagate-arrays' |
| # '--eliminate-local-single-store' |
| # '--eliminate-local-multi-store' |
| # '--eliminate-local-single-block' |
| # '--private-to-local' |
| # spirv-opt commit hash: ab7ac60f14ae66006bed5c989a2cfd4c4881704c |
| |
| |
| |
| 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 { |
| # vec2 injectionSwitch; |
| # }; |
| # |
| # void main() |
| # { |
| # for(int i = 0; i < 2 + int(injectionSwitch.x); i++) |
| # { |
| # int value = i; |
| # float y = 0.5; |
| # |
| # switch(value) |
| # { |
| # case 0: |
| # y += 0.5; |
| # // Always falls through. |
| # case 1: |
| # y = clamp(1.0, 0.5, y); |
| # // Always falls through. |
| # case 2: |
| # default: |
| # // Always ends up here. |
| # // Always true. |
| # if (y == 1.0) |
| # { |
| # _GLF_color = vec4(value + 1, 0, 0, 1); |
| # return; |
| # } |
| # } |
| # } |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 8 |
| ; Bound: 66 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %52 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %8 "i" |
| OpName %19 "buf0" |
| OpMemberName %19 0 "injectionSwitch" |
| OpName %21 "" |
| OpName %31 "value" |
| OpName %34 "y" |
| OpName %52 "_GLF_color" |
| OpMemberDecorate %19 0 Offset 0 |
| OpDecorate %19 Block |
| OpDecorate %21 DescriptorSet 0 |
| OpDecorate %21 Binding 0 |
| OpDecorate %52 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeInt 32 1 |
| %7 = OpTypePointer Function %6 |
| %9 = OpConstant %6 0 |
| %16 = OpConstant %6 2 |
| %17 = OpTypeFloat 32 |
| %18 = OpTypeVector %17 2 |
| %19 = OpTypeStruct %18 |
| %20 = OpTypePointer Uniform %19 |
| %21 = OpVariable %20 Uniform |
| %22 = OpTypeInt 32 0 |
| %23 = OpConstant %22 0 |
| %24 = OpTypePointer Uniform %17 |
| %29 = OpTypeBool |
| %33 = OpTypePointer Function %17 |
| %35 = OpConstant %17 0.5 |
| %43 = OpConstant %17 1 |
| %50 = OpTypeVector %17 4 |
| %51 = OpTypePointer Output %50 |
| %52 = OpVariable %51 Output |
| %54 = OpConstant %6 1 |
| %57 = OpConstant %17 0 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %8 = OpVariable %7 Function |
| %31 = OpVariable %7 Function |
| %34 = OpVariable %33 Function |
| OpStore %8 %9 |
| OpBranch %10 |
| %10 = OpLabel |
| %63 = OpPhi %6 %9 %5 %62 %13 |
| OpLoopMerge %12 %13 None |
| OpBranch %14 |
| %14 = OpLabel |
| %25 = OpAccessChain %24 %21 %9 %23 |
| %26 = OpLoad %17 %25 |
| %27 = OpConvertFToS %6 %26 |
| %28 = OpIAdd %6 %16 %27 |
| %30 = OpSLessThan %29 %63 %28 |
| OpBranchConditional %30 %11 %12 |
| %11 = OpLabel |
| OpStore %31 %63 |
| OpStore %34 %35 |
| OpSelectionMerge %40 None |
| OpSwitch %63 %39 0 %37 1 %38 2 %39 |
| %39 = OpLabel |
| %65 = OpPhi %17 %35 %11 %45 %38 |
| %47 = OpFOrdEqual %29 %65 %43 |
| OpSelectionMerge %49 None |
| OpBranchConditional %47 %48 %49 |
| %48 = OpLabel |
| %55 = OpIAdd %6 %63 %54 |
| %56 = OpConvertSToF %17 %55 |
| %58 = OpCompositeConstruct %50 %56 %57 %57 %43 |
| OpStore %52 %58 |
| OpReturn |
| %49 = OpLabel |
| OpBranch %40 |
| %37 = OpLabel |
| %42 = OpFAdd %17 %35 %35 |
| OpStore %34 %42 |
| OpBranch %38 |
| %38 = OpLabel |
| %64 = OpPhi %17 %35 %11 %42 %37 |
| %45 = OpExtInst %17 %1 FClamp %43 %35 %64 |
| OpStore %34 %45 |
| OpBranch %39 |
| %40 = OpLabel |
| OpBranch %13 |
| %13 = OpLabel |
| %62 = OpIAdd %6 %63 %54 |
| OpStore %8 %62 |
| OpBranch %10 |
| %12 = OpLabel |
| OpReturn |
| 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 |