Attachment 145110 Details for Bug 111449 – Another Amber test that exposes the problem

Another Amber test that exposes the problem

unreachable-loops.amber (text/plain), 4.76 KB, created by Alastair Donaldson on 2019-08-21 06:27:54 UTC

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Creator: Alastair Donaldson

Created: 2019-08-21 06:27:54 UTC

Size: 4.76 KB

patch

obsolete

>#!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: Fragment shader that writes red despite unreachable loops
>
># The test passes because red is written, and the loops inside the if (one of
># which would be infinite) are dynamically unreachable due to the runtime content
># of 'injected'.
>
>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 injected;
># };
>#
># void main()
># {
>#  _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
>#  if (injected.x > injected.y) {
>#    do
>#     {
>#     }
>#    while(false);
>#    {
>#     for(
>#         int m = 1;
>#         true;
>#         1
>#     )
>#      {
>#        _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: 45
>; Schema: 0
>               OpCapability Shader
>          %1 = OpExtInstImport "GLSL.std.450"
>               OpMemoryModel Logical GLSL450
>               OpEntryPoint Fragment %4 "main" %9
>               OpExecutionMode %4 OriginUpperLeft
>               OpSource ESSL 310
>               OpName %4 "main"
>               OpName %9 "_GLF_color"
>               OpName %14 "buf0"
>               OpMemberName %14 0 "injected"
>               OpName %16 ""
>               OpName %37 "m"
>               OpDecorate %9 Location 0
>               OpMemberDecorate %14 0 Offset 0
>               OpDecorate %14 Block
>               OpDecorate %16 DescriptorSet 0
>               OpDecorate %16 Binding 0
>               OpDecorate %37 RelaxedPrecision
>          %2 = OpTypeVoid
>          %3 = OpTypeFunction %2
>          %6 = OpTypeFloat 32
>          %7 = OpTypeVector %6 4
>          %8 = OpTypePointer Output %7
>          %9 = OpVariable %8 Output
>         %10 = OpConstant %6 1
>         %11 = OpConstant %6 0
>         %12 = OpConstantComposite %7 %10 %11 %11 %10
>         %13 = OpTypeVector %6 2
>         %14 = OpTypeStruct %13
>         %15 = OpTypePointer Uniform %14
>         %16 = OpVariable %15 Uniform
>         %17 = OpTypeInt 32 1
>         %18 = OpConstant %17 0
>         %19 = OpTypeInt 32 0
>         %20 = OpConstant %19 0
>         %21 = OpTypePointer Uniform %6
>         %24 = OpConstant %19 1
>         %27 = OpTypeBool
>         %35 = OpConstantFalse %27
>         %36 = OpTypePointer Function %17
>         %38 = OpConstant %17 1
>         %44 = OpConstantTrue %27
>          %4 = OpFunction %2 None %3
>          %5 = OpLabel
>         %37 = OpVariable %36 Function
>               OpStore %9 %12
>         %22 = OpAccessChain %21 %16 %18 %20
>         %23 = OpLoad %6 %22
>         %25 = OpAccessChain %21 %16 %18 %24
>         %26 = OpLoad %6 %25
>         %28 = OpFOrdGreaterThan %27 %23 %26
>               OpSelectionMerge %30 None
>               OpBranchConditional %28 %29 %30
>         %29 = OpLabel
>               OpBranch %31
>         %31 = OpLabel
>               OpLoopMerge %33 %34 None
>               OpBranch %32
>         %32 = OpLabel
>               OpBranch %34
>         %34 = OpLabel
>               OpBranchConditional %35 %31 %33
>         %33 = OpLabel
>               OpStore %37 %38
>               OpBranch %39
>         %39 = OpLabel
>               OpLoopMerge %41 %42 None
>               OpBranch %43
>         %43 = OpLabel
>               OpBranchConditional %44 %40 %41
>         %40 = OpLabel
>               OpStore %9 %12
>               OpBranch %42
>         %42 = OpLabel
>               OpBranch %39
>         %41 = OpLabel
>               OpBranch %30
>         %30 = OpLabel
>               OpReturn
>               OpFunctionEnd
>END
>
># uniforms for variant
>
># resolution
>BUFFER variant_resolution DATA_TYPE vec2<float> DATA
> 0.0 1.0
>END
>
>BUFFER framebuffer FORMAT B8G8R8A8_UNORM
>
>PIPELINE graphics gfz_pipeline
>  ATTACH variant_vertex_shader
>  ATTACH variant_fragment_shader
>  FRAMEBUFFER_SIZE 256 256
>  BIND BUFFER framebuffer AS color LOCATION 0
>  BIND BUFFER variant_resolution AS uniform DESCRIPTOR_SET 0 BINDING 0
>END
>CLEAR_COLOR gfz_pipeline 0 0 0 255
>
>CLEAR gfz_pipeline
>RUN gfz_pipeline DRAW_RECT POS 0 0 SIZE 256 256
>EXPECT framebuffer IDX 0 0 SIZE 256 256 EQ_RGB 255 0 0

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Attachments on bug 111449: 145109 | 145110

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