Vulkan-CTS-bin/vulkan/amber/graphicsfuzz/unreachable-loops-in-switch.amber

#!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 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;
#    }
#   }
#  }
# }

SHADER vertex variant_vertex_shader PASSTHROUGH

SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; 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
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