| #!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 a do while that always returns |
| |
| # The test passes because the shader always writes the color red. The do while returns on first iteration. |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--redundancy-elimination' |
| # '--reduce-load-size' |
| # '--combine-access-chains' |
| # '--eliminate-dead-code-aggressive' |
| # '--eliminate-dead-branches' |
| # 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; |
| # |
| # struct _GLF_struct_12 |
| # { |
| # int count; |
| # }; |
| # |
| # bool puzzlelize(vec2 pos) |
| # { |
| # return true; |
| # } |
| # |
| # void main() |
| # { |
| # _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); |
| # |
| # vec2 grid; |
| # _GLF_struct_12 _GLF_struct_replacement_12; |
| # |
| # do |
| # { |
| # if (gl_FragCoord.y > -1.0) // Always true |
| # { |
| # return; |
| # } |
| # } while (_GLF_struct_replacement_12.count != 1); |
| # |
| # grid += vec2(1, _GLF_struct_replacement_12.count); |
| # vec2 position; |
| # position = grid; |
| # vec4(puzzlelize(position)); |
| # |
| # _GLF_color = vec4(1.0, 1.0, 1.0, 1.0); // This should not be reached |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 7 |
| ; Bound: 64 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %19 %28 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %12 "puzzlelize(vf2;" |
| OpName %11 "pos" |
| OpName %19 "_GLF_color" |
| OpName %28 "gl_FragCoord" |
| OpName %40 "_GLF_struct_12" |
| OpMemberName %40 0 "count" |
| OpName %42 "_GLF_struct_replacement_12" |
| OpName %49 "grid" |
| OpName %56 "position" |
| OpName %58 "param" |
| OpDecorate %19 Location 0 |
| OpDecorate %28 BuiltIn FragCoord |
| OpMemberDecorate %40 0 RelaxedPrecision |
| OpDecorate %46 RelaxedPrecision |
| OpDecorate %51 RelaxedPrecision |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeVector %6 2 |
| %8 = OpTypePointer Function %7 |
| %9 = OpTypeBool |
| %10 = OpTypeFunction %9 %8 |
| %14 = OpConstantTrue %9 |
| %17 = OpTypeVector %6 4 |
| %18 = OpTypePointer Output %17 |
| %19 = OpVariable %18 Output |
| %20 = OpConstant %6 1 |
| %21 = OpConstant %6 0 |
| %22 = OpConstantComposite %17 %20 %21 %21 %20 |
| %27 = OpTypePointer Input %17 |
| %28 = OpVariable %27 Input |
| %29 = OpTypeInt 32 0 |
| %30 = OpConstant %29 1 |
| %31 = OpTypePointer Input %6 |
| %34 = OpConstant %6 -1 |
| %39 = OpTypeInt 32 1 |
| %40 = OpTypeStruct %39 |
| %41 = OpTypePointer Function %40 |
| %43 = OpConstant %39 0 |
| %44 = OpTypePointer Function %39 |
| %47 = OpConstant %39 1 |
| %63 = OpConstantComposite %17 %20 %20 %20 %20 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %42 = OpVariable %41 Function |
| %49 = OpVariable %8 Function |
| %56 = OpVariable %8 Function |
| %58 = OpVariable %8 Function |
| OpStore %19 %22 |
| OpBranch %23 |
| %23 = OpLabel |
| OpLoopMerge %25 %26 None |
| OpBranch %24 |
| %24 = OpLabel |
| %32 = OpAccessChain %31 %28 %30 |
| %33 = OpLoad %6 %32 |
| %35 = OpFOrdGreaterThan %9 %33 %34 |
| OpSelectionMerge %37 None |
| OpBranchConditional %35 %36 %37 |
| %36 = OpLabel |
| OpReturn |
| %37 = OpLabel |
| OpBranch %26 |
| %26 = OpLabel |
| %45 = OpAccessChain %44 %42 %43 |
| %46 = OpLoad %39 %45 |
| %48 = OpINotEqual %9 %46 %47 |
| OpBranchConditional %48 %23 %25 |
| %25 = OpLabel |
| %51 = OpLoad %39 %45 |
| %52 = OpConvertSToF %6 %51 |
| %53 = OpCompositeConstruct %7 %20 %52 |
| %54 = OpLoad %7 %49 |
| %55 = OpFAdd %7 %54 %53 |
| OpStore %49 %55 |
| %57 = OpLoad %7 %49 |
| OpStore %56 %57 |
| %59 = OpLoad %7 %56 |
| OpStore %58 %59 |
| %60 = OpFunctionCall %9 %12 %58 |
| OpStore %19 %63 |
| OpReturn |
| OpFunctionEnd |
| %12 = OpFunction %9 None %10 |
| %11 = OpFunctionParameter %8 |
| %13 = OpLabel |
| OpReturnValue %14 |
| 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 |