| #!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: Code wrapped in nested single iteration loops |
| |
| # The test passes because the first return statement in 'f' is guaranteed to be hit on the first loop iteration, so that red is written to the framebuffer |
| |
| 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; |
| # |
| # vec3 f() |
| # { |
| # int iteration = 0; |
| # for( |
| # int k = 0; |
| # k < 100; |
| # k ++ |
| # ) |
| # { |
| # iteration ++; |
| # } |
| # if(iteration < 100) |
| # { |
| # return vec3(1.0, float(iteration - 1), float(iteration - 1)); |
| # } |
| # else |
| # { |
| # do |
| # { |
| # do |
| # { |
| # return vec3(1.0, 0.0, 0.0); |
| # } |
| # while(false); |
| # } |
| # while(false); |
| # } |
| # } |
| # void main() |
| # { |
| # _GLF_color = vec4(f(), 1.0); |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 8 |
| ; Bound: 65 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %59 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %9 "f(" |
| OpName %13 "iteration" |
| OpName %15 "k" |
| OpName %59 "_GLF_color" |
| OpDecorate %13 RelaxedPrecision |
| OpDecorate %15 RelaxedPrecision |
| OpDecorate %21 RelaxedPrecision |
| OpDecorate %25 RelaxedPrecision |
| OpDecorate %27 RelaxedPrecision |
| OpDecorate %28 RelaxedPrecision |
| OpDecorate %29 RelaxedPrecision |
| OpDecorate %30 RelaxedPrecision |
| OpDecorate %35 RelaxedPrecision |
| OpDecorate %36 RelaxedPrecision |
| OpDecorate %38 RelaxedPrecision |
| OpDecorate %39 RelaxedPrecision |
| OpDecorate %59 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeVector %6 3 |
| %8 = OpTypeFunction %7 |
| %11 = OpTypeInt 32 1 |
| %12 = OpTypePointer Function %11 |
| %14 = OpConstant %11 0 |
| %22 = OpConstant %11 100 |
| %23 = OpTypeBool |
| %26 = OpConstant %11 1 |
| %34 = OpConstant %6 1 |
| %52 = OpConstant %6 0 |
| %53 = OpConstantComposite %7 %34 %52 %52 |
| %55 = OpConstantFalse %23 |
| %57 = OpTypeVector %6 4 |
| %58 = OpTypePointer Output %57 |
| %59 = OpVariable %58 Output |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %60 = OpFunctionCall %7 %9 |
| %61 = OpCompositeExtract %6 %60 0 |
| %62 = OpCompositeExtract %6 %60 1 |
| %63 = OpCompositeExtract %6 %60 2 |
| %64 = OpCompositeConstruct %57 %61 %62 %63 %34 |
| OpStore %59 %64 |
| OpReturn |
| OpFunctionEnd |
| %9 = OpFunction %7 None %8 |
| %10 = OpLabel |
| %13 = OpVariable %12 Function |
| %15 = OpVariable %12 Function |
| OpStore %13 %14 |
| OpStore %15 %14 |
| OpBranch %16 |
| %16 = OpLabel |
| OpLoopMerge %18 %19 None |
| OpBranch %20 |
| %20 = OpLabel |
| %21 = OpLoad %11 %15 |
| %24 = OpSLessThan %23 %21 %22 |
| OpBranchConditional %24 %17 %18 |
| %17 = OpLabel |
| %25 = OpLoad %11 %13 |
| %27 = OpIAdd %11 %25 %26 |
| OpStore %13 %27 |
| OpBranch %19 |
| %19 = OpLabel |
| %28 = OpLoad %11 %15 |
| %29 = OpIAdd %11 %28 %26 |
| OpStore %15 %29 |
| OpBranch %16 |
| %18 = OpLabel |
| %30 = OpLoad %11 %13 |
| %31 = OpSLessThan %23 %30 %22 |
| OpSelectionMerge %33 None |
| OpBranchConditional %31 %32 %43 |
| %32 = OpLabel |
| %35 = OpLoad %11 %13 |
| %36 = OpISub %11 %35 %26 |
| %37 = OpConvertSToF %6 %36 |
| %38 = OpLoad %11 %13 |
| %39 = OpISub %11 %38 %26 |
| %40 = OpConvertSToF %6 %39 |
| %41 = OpCompositeConstruct %7 %34 %37 %40 |
| OpReturnValue %41 |
| %43 = OpLabel |
| OpBranch %44 |
| %44 = OpLabel |
| OpLoopMerge %46 %47 None |
| OpBranch %45 |
| %45 = OpLabel |
| OpBranch %48 |
| %48 = OpLabel |
| OpLoopMerge %50 %51 None |
| OpBranch %49 |
| %49 = OpLabel |
| OpReturnValue %53 |
| %51 = OpLabel |
| OpBranch %48 |
| %50 = OpLabel |
| OpUnreachable |
| %47 = OpLabel |
| OpBranch %44 |
| %46 = OpLabel |
| OpUnreachable |
| %33 = OpLabel |
| OpUnreachable |
| OpFunctionEnd |
| 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 |
| 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 |