#!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 two loops that write to a struct

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

# Optimized using spirv-opt with the following arguments:
# '--private-to-local'
# '--private-to-local'
# '--eliminate-dead-inserts'
# '--if-conversion'
# '--eliminate-dead-code-aggressive'
# '--eliminate-dead-code-aggressive'
# '--vector-dce'
# '--convert-local-access-chains'
# '--convert-local-access-chains'
# '--eliminate-local-single-block'
# '--eliminate-dead-code-aggressive'
# '--redundancy-elimination'
# '--eliminate-local-multi-store'
# '--eliminate-dead-branches'
# '--merge-blocks'
# '--eliminate-dead-code-aggressive'
# '--eliminate-dead-branches'
# '--eliminate-dead-inserts'
# '--simplify-instructions'
# '--eliminate-local-multi-store'
# '--private-to-local'
# '--combine-access-chains'
# '--eliminate-local-single-store'
# '--eliminate-dead-branches'
# '--merge-return'
# spirv-opt commit hash: 06407250a169c6a03b3765e86619075af1a8c187


SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
# precision highp float;
#
# struct StructType
# {
#     vec3 col;
#     bvec4 bbbb;
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# layout(set = 0, binding = 0) uniform buf0
# {
#     vec2 injectionSwitch;
# };
# void main()
# {
#     StructType s;
#
#     for (
#         int i = 0;
#         i < int(injectionSwitch.y); // i < 1
#         i++)
#     {
#         s.col = vec3(1.0, 0.0, 0.0);
#     }
#
#     for (
#         int i = 0;
#         i < int(injectionSwitch.y); // i < 1
#         i++)
#     {
#         s.col = vec3(1.0, 0.0, 0.0);;
#     }
#     _GLF_color = vec4(s.col, 1.0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 7
; Bound: 75
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %58
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %18 "buf0"
               OpMemberName %18 0 "injectionSwitch"
               OpName %20 ""
               OpName %31 "StructType"
               OpMemberName %31 0 "col"
               OpMemberName %31 1 "bbbb"
               OpName %58 "_GLF_color"
               OpMemberDecorate %18 0 Offset 0
               OpDecorate %18 Block
               OpDecorate %20 DescriptorSet 0
               OpDecorate %20 Binding 0
               OpDecorate %41 RelaxedPrecision
               OpDecorate %55 RelaxedPrecision
               OpDecorate %58 Location 0
               OpDecorate %70 RelaxedPrecision
               OpDecorate %71 RelaxedPrecision
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %9 = OpConstant %6 0
         %16 = OpTypeFloat 32
         %17 = OpTypeVector %16 2
         %18 = OpTypeStruct %17
         %19 = OpTypePointer Uniform %18
         %20 = OpVariable %19 Uniform
         %21 = OpTypeInt 32 0
         %22 = OpConstant %21 1
         %23 = OpTypePointer Uniform %16
         %27 = OpTypeBool
         %29 = OpTypeVector %16 3
         %30 = OpTypeVector %27 4
         %31 = OpTypeStruct %29 %30
         %34 = OpConstant %16 1
         %35 = OpConstant %16 0
         %36 = OpConstantComposite %29 %34 %35 %35
         %40 = OpConstant %6 1
         %56 = OpTypeVector %16 4
         %57 = OpTypePointer Output %56
         %58 = OpVariable %57 Output
         %74 = OpUndef %31
          %4 = OpFunction %2 None %3
          %5 = OpLabel
               OpBranch %10
         %10 = OpLabel
         %73 = OpPhi %31 %74 %5 %66 %11
         %70 = OpPhi %6 %9 %5 %41 %11
         %24 = OpAccessChain %23 %20 %9 %22
         %25 = OpLoad %16 %24
         %26 = OpConvertFToS %6 %25
         %28 = OpSLessThan %27 %70 %26
               OpLoopMerge %12 %11 None
               OpBranchConditional %28 %11 %12
         %11 = OpLabel
         %66 = OpCompositeInsert %31 %36 %73 0
         %41 = OpIAdd %6 %70 %40
               OpBranch %10
         %12 = OpLabel
               OpBranch %43
         %43 = OpLabel
         %72 = OpPhi %31 %73 %12 %68 %44
         %71 = OpPhi %6 %9 %12 %55 %44
         %52 = OpSLessThan %27 %71 %26
               OpLoopMerge %45 %44 None
               OpBranchConditional %52 %44 %45
         %44 = OpLabel
         %68 = OpCompositeInsert %31 %36 %72 0
         %55 = OpIAdd %6 %71 %40
               OpBranch %43
         %45 = OpLabel
         %60 = OpCompositeExtract %29 %72 0
         %61 = OpCompositeExtract %16 %60 0
         %62 = OpCompositeExtract %16 %60 1
         %63 = OpCompositeExtract %16 %60 2
         %64 = OpCompositeConstruct %56 %61 %62 %63 %34
               OpStore %58 %64
               OpReturn
               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