#!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 nested do while and undefined int

# The test passes because the shader always writes color red. performPartition() writes the color red and then always returns early.

# Optimized using spirv-opt with the following arguments:
# '--if-conversion'
# '--redundancy-elimination'
# '--eliminate-local-multi-store'
# '--ccp'
# '--eliminate-local-multi-store'
# '--eliminate-dead-inserts'
# '--ccp'
# '--eliminate-dead-branches'
# '--merge-blocks'
# '--eliminate-dead-inserts'
# '--ccp'
# '--eliminate-dead-branches'
# '--private-to-local'
# '--eliminate-dead-branches'
# spirv-opt commit hash: ad7f2c5c4c7f51360e9e079109a9217aa5ba5cc0


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;
# };
#
# int performPartition()
# {
#   _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); // Write color red
#   int i;
#   do
#   {
#     if (injectionSwitch.y < 0.0) // Always false
#     {
#     }
#     else
#     {
#       for (int GLF_live0i = 0; GLF_live0i < 1; GLF_live0i++)
#       {
#         if (injectionSwitch.y < 0.0) // Always false
#         {
#           break;
#         }
#         return 1; // We always return here. The code below is never executed.
#       }
#       if (injectionSwitch.y < 0.0)
#       {
#         do
#         {
#           return 1;
#         } while (false);
#       }
#     }
#   } while (false);
#   return i;
# }
#
# void main()
# {
#   performPartition();
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 7
; Bound: 80
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %13
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "performPartition("
               OpName %13 "_GLF_color"
               OpName %22 "buf0"
               OpMemberName %22 0 "injectionSwitch"
               OpName %24 ""
               OpName %37 "GLF_live0i"
               OpName %66 "i"
               OpDecorate %8 RelaxedPrecision
               OpDecorate %13 Location 0
               OpMemberDecorate %22 0 Offset 0
               OpDecorate %22 Block
               OpDecorate %24 DescriptorSet 0
               OpDecorate %24 Binding 0
               OpDecorate %37 RelaxedPrecision
               OpDecorate %66 RelaxedPrecision
               OpDecorate %70 RelaxedPrecision
               OpDecorate %73 RelaxedPrecision
               OpDecorate %72 RelaxedPrecision
               OpDecorate %73 RelaxedPrecision
               OpDecorate %73 RelaxedPrecision
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypeFunction %6
         %10 = OpTypeFloat 32
         %11 = OpTypeVector %10 4
         %12 = OpTypePointer Output %11
         %13 = OpVariable %12 Output
         %14 = OpConstant %10 1
         %15 = OpConstant %10 0
         %16 = OpConstantComposite %11 %14 %15 %15 %14
         %21 = OpTypeVector %10 2
         %22 = OpTypeStruct %21
         %23 = OpTypePointer Uniform %22
         %24 = OpVariable %23 Uniform
         %25 = OpConstant %6 0
         %26 = OpTypeInt 32 0
         %27 = OpConstant %26 1
         %28 = OpTypePointer Uniform %10
         %31 = OpTypeBool
         %36 = OpTypePointer Function %6
         %44 = OpConstant %6 1
         %65 = OpConstantFalse %31
         %74 = OpUndef %6
         %78 = OpConstantTrue %31
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %70 = OpFunctionCall %6 %8
               OpReturn
               OpFunctionEnd
          %8 = OpFunction %6 None %7
          %9 = OpLabel
         %37 = OpVariable %36 Function
         %66 = OpVariable %36 Function
               OpStore %13 %16
               OpBranch %17
         %17 = OpLabel
         %73 = OpPhi %6 %74 %9 %72 %34
               OpLoopMerge %19 %34 None
               OpBranch %18
         %18 = OpLabel
         %29 = OpAccessChain %28 %24 %25 %27
         %30 = OpLoad %10 %29
         %32 = OpFOrdLessThan %31 %30 %15
               OpSelectionMerge %79 None
               OpBranchConditional %32 %33 %35
         %35 = OpLabel
               OpStore %37 %25
               OpBranch %38
         %38 = OpLabel
         %45 = OpSLessThan %31 %25 %44
               OpLoopMerge %49 %41 None
               OpBranch %39
         %39 = OpLabel
               OpSelectionMerge %50 None
               OpBranchConditional %32 %49 %50
         %49 = OpLabel
               OpSelectionMerge %59 None
               OpBranchConditional %32 %58 %59
         %50 = OpLabel
               OpReturnValue %44
         %41 = OpLabel
               OpBranch %38
         %58 = OpLabel
               OpBranch %60
         %60 = OpLabel
               OpLoopMerge %62 %63 None
               OpBranch %61
         %61 = OpLabel
               OpReturnValue %44
         %63 = OpLabel
               OpBranch %60
         %62 = OpLabel
               OpUnreachable
         %59 = OpLabel
               OpBranch %34
         %33 = OpLabel
               OpBranch %34
         %79 = OpLabel
               OpBranch %34
         %34 = OpLabel
         %72 = OpPhi %6 %73 %33 %73 %59 %25 %79
               OpBranchConditional %65 %17 %19
         %19 = OpLabel
               OpReturnValue %72
               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