#!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 shader with a switch statement containing unreachable discards

# The test passes because the shader always writes the color red.

# Optimized using spirv-opt with the following arguments:
# '-O'
# spirv-opt commit hash: 6b072126595dd8c2448eb1fda616251c5e6d7079


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 injectionSwitch;
# };
# vec3 drawShape(vec2 square)
# {
#  switch(int(injectionSwitch.x))
#   {
#    case 0:
#    return vec3(1.0, 0.0, 0.0);
#    case 67:
#    do
#     {
#      if(1.0 < square.x)
#       {
#       }
#      else
#       {
#        discard;
#       }
#      discard;
#     }
#    while(true);
#   }
#  return vec3(1.0);
# }
# void main()
# {
#  vec2 center;
#  vec3 color = vec3(0.0);
#  for(
#      int i = 0;
#      i < 1;
#      i++
#  )
#   {
#    color = drawShape(center);
#    if(length(color) <= 0.0)
#     {
#      continue;
#     }
#   }
#   _GLF_color = vec4(color, 1.0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 7
; Bound: 139
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %78
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %14 "buf0"
               OpMemberName %14 0 "injectionSwitch"
               OpName %16 ""
               OpName %78 "_GLF_color"
               OpMemberDecorate %14 0 Offset 0
               OpDecorate %14 Block
               OpDecorate %16 DescriptorSet 0
               OpDecorate %16 Binding 0
               OpDecorate %75 RelaxedPrecision
               OpDecorate %78 Location 0
               OpDecorate %132 RelaxedPrecision
               OpDecorate %132 RelaxedPrecision
               OpDecorate %132 RelaxedPrecision
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 2
          %9 = OpTypeVector %6 3
         %14 = OpTypeStruct %7
         %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
         %28 = OpConstant %6 1
         %29 = OpConstant %6 0
         %30 = OpConstantComposite %9 %28 %29 %29
         %39 = OpTypeBool
         %48 = OpConstantComposite %9 %28 %28 %28
         %53 = OpConstantComposite %9 %29 %29 %29
         %62 = OpConstant %17 1
         %76 = OpTypeVector %6 4
         %77 = OpTypePointer Output %76
         %78 = OpVariable %77 Output
        %135 = OpUndef %7
          %4 = OpFunction %2 None %3
          %5 = OpLabel
               OpBranch %56
         %56 = OpLabel
        %133 = OpPhi %9 %53 %5 %137 %59
        %132 = OpPhi %17 %18 %5 %75 %59
         %63 = OpSLessThan %39 %132 %62
               OpLoopMerge %58 %59 None
               OpBranchConditional %63 %57 %58
         %57 = OpLabel
               OpBranch %104
        %104 = OpLabel
               OpLoopMerge %105 %106 None
               OpBranch %107
        %107 = OpLabel
        %108 = OpAccessChain %21 %16 %18 %20
        %109 = OpLoad %6 %108
        %110 = OpConvertFToS %17 %109
               OpSelectionMerge %111 None
               OpSwitch %110 %111 0 %112 67 %113
        %113 = OpLabel
               OpBranch %114
        %114 = OpLabel
               OpLoopMerge %115 %116 None
               OpBranch %117
        %117 = OpLabel
        %119 = OpCompositeExtract %6 %135 0
        %120 = OpFOrdLessThan %39 %28 %119
               OpSelectionMerge %122 None
               OpBranchConditional %120 %122 %123
        %123 = OpLabel
        %124 = OpFunctionCall %2 %84
        %125 = OpUndef %9
               OpBranch %115
        %122 = OpLabel
        %126 = OpFunctionCall %2 %84
        %127 = OpUndef %9
               OpBranch %115
        %116 = OpLabel
               OpBranch %114
        %115 = OpLabel
        %138 = OpPhi %9 %125 %123 %127 %122
               OpBranch %105
        %112 = OpLabel
               OpBranch %105
        %111 = OpLabel
               OpBranch %105
        %106 = OpLabel
               OpBranch %104
        %105 = OpLabel
        %137 = OpPhi %9 %138 %115 %30 %112 %48 %111
         %69 = OpExtInst %6 %1 Length %137
         %70 = OpFOrdLessThanEqual %39 %69 %29
               OpSelectionMerge %72 None
               OpBranchConditional %70 %71 %72
         %71 = OpLabel
               OpBranch %59
         %72 = OpLabel
               OpBranch %59
         %59 = OpLabel
         %75 = OpIAdd %17 %132 %62
               OpBranch %56
         %58 = OpLabel
         %80 = OpCompositeExtract %6 %133 0
         %81 = OpCompositeExtract %6 %133 1
         %82 = OpCompositeExtract %6 %133 2
         %83 = OpCompositeConstruct %76 %80 %81 %82 %28
               OpStore %78 %83
               OpReturn
               OpFunctionEnd
         %84 = OpFunction %2 None %3
         %85 = OpLabel
               OpKill
               OpFunctionEnd
END

# uniforms for variant

# injectionSwitch
BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
 0.0 1.0
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
  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 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