#!amber

# Copyright 2020 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 the GraphicsFuzz project.

# Short description: A fragment shader with true if in a nested do while loop

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

# Optimized using spirv-opt with the following arguments:
# '--simplify-instructions'
# '--private-to-local'
# '--eliminate-local-multi-store'
# '--convert-local-access-chains'
# '--inline-entry-points-exhaustive'
# '--simplify-instructions'
# '--eliminate-dead-inserts'
# '--vector-dce'
# '--combine-access-chains'
# '--convert-local-access-chains'
# '--if-conversion'
# '--private-to-local'
# '--eliminate-local-single-store'
# '--copy-propagate-arrays'
# spirv-opt commit hash: 230f363e6da32791f640b02205e0645cc67c3f1d


SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 320 es
# precision highp float;
#
# precision highp int;
#
# layout(location = 0) out vec4 _GLF_color;
# layout(set = 0, binding = 0) uniform buf0
# {
#     vec2 injectionSwitch;   // x == 0.0, y == 1.0
# };
#
# int func()
# {
#     const int loop_limit = 100;
#     int loop_count = 0;
#     do
#     {
#         loop_count++;
#         do
#         {
#             loop_count++;
#             // Always true.
#             if (injectionSwitch.x < injectionSwitch.y)
#             {
#                 return 1;
#             }
#             // Always true.
#             if (injectionSwitch.x < injectionSwitch.y)
#             {
#                 break;
#             }
#         } while (loop_count < loop_limit);
#     } while (loop_count < loop_limit);
#     return 0;
# }
# void main()
# {
#     if(func() == 1)
#     {
#         _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
#     }
#     else
#     {
#         _GLF_color = vec4(1.0);
#     }
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 73
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %65
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "func("
               OpName %11 "loop_count"
               OpName %28 "buf0"
               OpMemberName %28 0 "injectionSwitch"
               OpName %30 ""
               OpName %65 "_GLF_color"
               OpMemberDecorate %28 0 Offset 0
               OpDecorate %28 Block
               OpDecorate %30 DescriptorSet 0
               OpDecorate %30 Binding 0
               OpDecorate %65 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypeFunction %6
         %10 = OpTypePointer Function %6
         %12 = OpConstant %6 0
         %18 = OpConstant %6 1
         %26 = OpTypeFloat 32
         %27 = OpTypeVector %26 2
         %28 = OpTypeStruct %27
         %29 = OpTypePointer Uniform %28
         %30 = OpVariable %29 Uniform
         %31 = OpTypeInt 32 0
         %32 = OpConstant %31 0
         %33 = OpTypePointer Uniform %26
         %36 = OpConstant %31 1
         %39 = OpTypeBool
         %53 = OpConstant %6 100
         %63 = OpTypeVector %26 4
         %64 = OpTypePointer Output %63
         %65 = OpVariable %64 Output
         %66 = OpConstant %26 1
         %67 = OpConstant %26 0
         %68 = OpConstantComposite %63 %66 %67 %67 %66
         %70 = OpConstantComposite %63 %66 %66 %66 %66
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %59 = OpFunctionCall %6 %8
         %60 = OpIEqual %39 %59 %18
               OpSelectionMerge %62 None
               OpBranchConditional %60 %61 %69
         %61 = OpLabel
               OpStore %65 %68
               OpBranch %62
         %69 = OpLabel
               OpStore %65 %70
               OpBranch %62
         %62 = OpLabel
               OpReturn
               OpFunctionEnd
          %8 = OpFunction %6 None %7
          %9 = OpLabel
         %11 = OpVariable %10 Function
               OpStore %11 %12
               OpBranch %13
         %13 = OpLabel
         %71 = OpPhi %6 %12 %9 %25 %16
               OpLoopMerge %15 %16 None
               OpBranch %14
         %14 = OpLabel
         %19 = OpIAdd %6 %71 %18
               OpStore %11 %19
               OpBranch %20
         %20 = OpLabel
         %72 = OpPhi %6 %19 %14 %25 %23
               OpLoopMerge %22 %23 None
               OpBranch %21
         %21 = OpLabel
         %25 = OpIAdd %6 %72 %18
               OpStore %11 %25
         %34 = OpAccessChain %33 %30 %12 %32
         %35 = OpLoad %26 %34
         %37 = OpAccessChain %33 %30 %12 %36
         %38 = OpLoad %26 %37
         %40 = OpFOrdLessThan %39 %35 %38
               OpSelectionMerge %42 None
               OpBranchConditional %40 %41 %42
         %41 = OpLabel
               OpReturnValue %18
         %42 = OpLabel
         %44 = OpAccessChain %33 %30 %12 %32
         %45 = OpLoad %26 %44
         %46 = OpAccessChain %33 %30 %12 %36
         %47 = OpLoad %26 %46
         %48 = OpFOrdLessThan %39 %45 %47
               OpSelectionMerge %50 None
               OpBranchConditional %48 %49 %50
         %49 = OpLabel
               OpBranch %22
         %50 = OpLabel
               OpBranch %23
         %23 = OpLabel
         %54 = OpSLessThan %39 %25 %53
               OpBranchConditional %54 %20 %22
         %22 = OpLabel
               OpBranch %16
         %16 = OpLabel
         %56 = OpSLessThan %39 %25 %53
               OpBranchConditional %56 %13 %15
         %15 = OpLabel
               OpReturnValue %12
               OpFunctionEnd
END

# uniforms for variant

# injectionSwitch
BUFFER variant_injectionSwitch DATA_TYPE vec2<float> STD140 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