Attachment 144706 Details for Bug 111070 – Amber test exposing the problem

Amber test exposing the problem

unreachable-loops-in-switch.amber (text/plain), 5.28 KB, created by Alastair Donaldson on 2019-07-04 22:54:16 UTC

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Creator: Alastair Donaldson

Created: 2019-07-04 22:54:16 UTC

Size: 5.28 KB

patch

obsolete

># 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 unreachable loops in a switch
>
># The test passes because the fragment shader writes a red pixel, and then
># terminates without further output manipulation
>
># Derived from the following GLSL.
>
># Fragment shader GLSL:
># #version 310 es
>#
># precision highp float;
>#
># layout(location = 0) out vec4 _GLF_color;
>#
># void main()
># {
>#  _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
>#  float data[1];
>#  for(int i = 0; i < 1; i++) {
>#   if(data[i] < data[0]) {
>#    if(false) {
>#     if(float(i) >= 1.0) { }
>#    }
>#    switch(0) {
>#     case 1:
>#      for(; 1 > 0;) { }
>#      for(;;) { }
>#     case 0:
>#      data[0] = 2.0;
>#      break;
>#    }
>#   }
>#  }
># }
>
>[require]
>fbsize 256 256
>
>[vertex shader passthrough]
>
>[fragment shader spirv]
>; SPIR-V
>; Version: 1.0
>; Generator: Khronos Glslang Reference Front End; 7
>; Bound: 67
>; 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 %15 "i"
>               OpName %30 "data"
>               OpDecorate %9 Location 0
>               OpDecorate %15 RelaxedPrecision
>               OpDecorate %22 RelaxedPrecision
>               OpDecorate %31 RelaxedPrecision
>               OpDecorate %43 RelaxedPrecision
>               OpDecorate %65 RelaxedPrecision
>               OpDecorate %66 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 = OpTypeInt 32 1
>         %14 = OpTypePointer Function %13
>         %16 = OpConstant %13 0
>         %23 = OpConstant %13 1
>         %24 = OpTypeBool
>         %26 = OpTypeInt 32 0
>         %27 = OpConstant %26 1
>         %28 = OpTypeArray %6 %27
>         %29 = OpTypePointer Function %28
>         %32 = OpTypePointer Function %6
>         %40 = OpConstantFalse %24
>         %56 = OpConstantTrue %24
>         %61 = OpConstant %6 2
>          %4 = OpFunction %2 None %3
>          %5 = OpLabel
>         %15 = OpVariable %14 Function
>         %30 = OpVariable %29 Function
>               OpStore %9 %12
>               OpStore %15 %16
>               OpBranch %17
>         %17 = OpLabel
>               OpLoopMerge %19 %20 None
>               OpBranch %21
>         %21 = OpLabel
>         %22 = OpLoad %13 %15
>         %25 = OpSLessThan %24 %22 %23
>               OpBranchConditional %25 %18 %19
>         %18 = OpLabel
>         %31 = OpLoad %13 %15
>         %33 = OpAccessChain %32 %30 %31
>         %34 = OpLoad %6 %33
>         %35 = OpAccessChain %32 %30 %16
>         %36 = OpLoad %6 %35
>         %37 = OpFOrdLessThan %24 %34 %36
>               OpSelectionMerge %39 None
>               OpBranchConditional %37 %38 %39
>         %38 = OpLabel
>               OpSelectionMerge %42 None
>               OpBranchConditional %40 %41 %42
>         %41 = OpLabel
>         %43 = OpLoad %13 %15
>         %44 = OpConvertSToF %6 %43
>         %45 = OpFOrdGreaterThanEqual %24 %44 %10
>               OpSelectionMerge %47 None
>               OpBranchConditional %45 %46 %47
>         %46 = OpLabel
>               OpBranch %47
>         %47 = OpLabel
>               OpBranch %42
>         %42 = OpLabel
>               OpSelectionMerge %50 None
>               OpSwitch %16 %50 1 %48 0 %49
>         %48 = OpLabel
>               OpBranch %51
>         %51 = OpLabel
>               OpLoopMerge %53 %54 None
>               OpBranch %55
>         %55 = OpLabel
>               OpBranchConditional %56 %52 %53
>         %52 = OpLabel
>               OpBranch %54
>         %54 = OpLabel
>               OpBranch %51
>         %53 = OpLabel
>               OpBranch %57
>         %57 = OpLabel
>               OpLoopMerge %59 %60 None
>               OpBranch %58
>         %58 = OpLabel
>               OpBranch %60
>         %60 = OpLabel
>               OpBranch %57
>         %59 = OpLabel
>               OpBranch %49
>         %49 = OpLabel
>         %62 = OpAccessChain %32 %30 %16
>               OpStore %62 %61
>               OpBranch %50
>         %50 = OpLabel
>               OpBranch %39
>         %39 = OpLabel
>               OpBranch %20
>         %20 = OpLabel
>         %65 = OpLoad %13 %15
>         %66 = OpIAdd %13 %65 %23
>               OpStore %15 %66
>               OpBranch %17
>         %19 = OpLabel
>               OpReturn
>               OpFunctionEnd
>
>
>[test]
>draw rect -1 -1 2 2
>probe rgba (0, 0) (1, 0, 0, 1)

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Attachments on bug 111070: 144706 | 144709

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