#!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: Fragment shader using (int, mat2) struct

# The test passes because the struct instance is created and used in a way that guarantees writing red to the output buffer

# Optimized using spirv-opt with the following arguments:
# '--eliminate-local-single-block'
# '--eliminate-dead-branches'
# '--vector-dce'
# '--simplify-instructions'
# '--reduce-load-size'
# '--eliminate-local-multi-store'
# '--private-to-local'
# '--eliminate-dead-branches'
# '--eliminate-dead-branches'
# '--merge-return'
# '--ccp'
# '--reduce-load-size'
# '--eliminate-local-single-block'
# '--scalar-replacement=100'
# '--combine-access-chains'
# '--if-conversion'
# '--ccp'
# '--eliminate-dead-branches'
# '--vector-dce'
# '--eliminate-dead-branches'
# '--merge-return'
# '--eliminate-local-single-block'
# '--inline-entry-points-exhaustive'
# '--eliminate-dead-inserts'
# '--eliminate-local-multi-store'
# '--convert-local-access-chains'
# '--eliminate-dead-branches'
# '--vector-dce'
# '--eliminate-dead-inserts'
# '--private-to-local'
# '--eliminate-local-multi-store'
# spirv-opt commit hash: f1e5cd73f658abcc23ee96d78f2dc27c4b7028c1


SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
# precision highp float;
#
# struct S {
#  int f1;
#  mat2 f2;
# } ;
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#  S myS = S(1, transpose(gl_FragCoord.x < 0.0 ? mat2(1.0, 2.0, 3.0, 4.0) : mat2(0.5, -0.5, -0.5, 0.5)));
#  _GLF_color = vec4(float(myS.f1), myS.f2[0][0] + myS.f2[1][0], myS.f2[0][1] + myS.f2[1][1], float(myS.f1));
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 81
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %16 %46
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %10 "S"
               OpMemberName %10 0 "f1"
               OpMemberName %10 1 "f2"
               OpName %16 "gl_FragCoord"
               OpName %46 "_GLF_color"
               OpMemberDecorate %10 0 RelaxedPrecision
               OpDecorate %16 BuiltIn FragCoord
               OpDecorate %46 Location 0
               OpDecorate %69 RelaxedPrecision
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypeFloat 32
          %8 = OpTypeVector %7 2
          %9 = OpTypeMatrix %8 2
         %10 = OpTypeStruct %6 %9
         %11 = OpTypePointer Function %10
         %13 = OpConstant %6 1
         %14 = OpTypeVector %7 4
         %15 = OpTypePointer Input %14
         %16 = OpVariable %15 Input
         %17 = OpTypeInt 32 0
         %18 = OpConstant %17 0
         %19 = OpTypePointer Input %7
         %22 = OpConstant %7 0
         %23 = OpTypeBool
         %25 = OpTypePointer Function %9
         %29 = OpConstant %7 1
         %30 = OpConstant %7 2
         %31 = OpConstantComposite %8 %29 %30
         %32 = OpConstant %7 3
         %33 = OpConstant %7 4
         %34 = OpConstantComposite %8 %32 %33
         %35 = OpConstantComposite %9 %31 %34
         %37 = OpConstant %7 0.5
         %38 = OpConstant %7 -0.5
         %39 = OpConstantComposite %8 %37 %38
         %40 = OpConstantComposite %8 %38 %37
         %41 = OpConstantComposite %9 %39 %40
         %45 = OpTypePointer Output %14
         %46 = OpVariable %45 Output
         %47 = OpConstant %6 0
         %48 = OpTypePointer Function %6
         %52 = OpTypePointer Function %7
         %58 = OpConstant %17 1
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %70 = OpVariable %25 Function
         %69 = OpVariable %48 Function
         %26 = OpVariable %25 Function
         %20 = OpAccessChain %19 %16 %18
         %21 = OpLoad %7 %20
         %24 = OpFOrdLessThan %23 %21 %22
               OpSelectionMerge %28 None
               OpBranchConditional %24 %27 %36
         %27 = OpLabel
               OpStore %26 %35
               OpBranch %28
         %36 = OpLabel
               OpStore %26 %41
               OpBranch %28
         %28 = OpLabel
         %68 = OpPhi %9 %35 %27 %41 %36
         %43 = OpTranspose %9 %68
         %44 = OpCompositeConstruct %10 %13 %43
         %71 = OpCompositeExtract %6 %44 0
               OpStore %69 %71
         %72 = OpCompositeExtract %9 %44 1
               OpStore %70 %72
         %51 = OpConvertSToF %7 %71
         %73 = OpAccessChain %52 %70 %47 %18
         %77 = OpLoad %9 %70
         %54 = OpCompositeExtract %7 %77 0 0
         %74 = OpAccessChain %52 %70 %13 %18
         %78 = OpLoad %9 %70
         %56 = OpCompositeExtract %7 %78 1 0
         %57 = OpFAdd %7 %54 %56
         %75 = OpAccessChain %52 %70 %47 %58
         %79 = OpLoad %9 %70
         %60 = OpCompositeExtract %7 %79 0 1
         %76 = OpAccessChain %52 %70 %13 %58
         %80 = OpLoad %9 %70
         %62 = OpCompositeExtract %7 %80 1 1
         %63 = OpFAdd %7 %60 %62
         %66 = OpConvertSToF %7 %71
         %67 = OpCompositeConstruct %14 %51 %57 %63 %66
               OpStore %46 %67
               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