#!amber

# Copyright 2021 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 coverage-gap found by the GraphicsFuzz project.

# Short description: A fragment shader that covers specific LLVM code paths

# The test passes because the shader always writes red.

# Optimized using spirv-opt with the following arguments:
# '--if-conversion'
# '--convert-local-access-chains'
# '--eliminate-dead-branches'
# '--merge-return'
# '--eliminate-local-single-block'
# '--simplify-instructions'
# '--simplify-instructions'
# '--combine-access-chains'
# '--convert-local-access-chains'
# '--eliminate-dead-branches'
# '--ccp'
# '--eliminate-local-single-block'
# '--combine-access-chains'
# '--private-to-local'
# '--eliminate-dead-inserts'
# '--redundancy-elimination'
# '--scalar-replacement=100'
# '--eliminate-dead-branches'
# '--eliminate-local-multi-store'
# '--if-conversion'
# '--eliminate-dead-branches'
# '--eliminate-local-single-block'
# '--scalar-replacement=100'
# '--private-to-local'
# '--eliminate-dead-branches'
# '--eliminate-local-single-block'
# '--if-conversion'
# '--redundancy-elimination'
# spirv-opt commit hash: a0370efd589be33d5d9a85cfde2f85841b3755af


SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 320 es
# #define _int_1 _GLF_uniform_int_values[0]
# #define _int_0 _GLF_uniform_int_values[1]
#
# precision highp float;
# precision highp int;
#
# // Contents of _GLF_uniform_int_values: [1, 0]
# layout(set = 0, binding = 0) uniform buf0
# {
#     int _GLF_uniform_int_values[2];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# // This function always returns one.
# int func()
# {
#     // Always true.
#     if(unpackUnorm2x16(1u).y == 0.0)
#     {
#         return _int_1;
#     }
#     else
#     {
#         return _int_0;
#     }
# }
#
# void main()
# {
#     // Always true.
#     if(func() == _int_1)
#     {
#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
#     }
#     else
#     {
#         _GLF_color = vec4(_int_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: 75
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %45
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "func("
               OpName %23 "buf0"
               OpMemberName %23 0 "_GLF_uniform_int_values"
               OpName %25 ""
               OpName %45 "_GLF_color"
               OpDecorate %22 ArrayStride 16
               OpMemberDecorate %23 0 Offset 0
               OpDecorate %23 Block
               OpDecorate %25 DescriptorSet 0
               OpDecorate %25 Binding 0
               OpDecorate %45 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypeFunction %6
         %10 = OpTypeInt 32 0
         %11 = OpConstant %10 1
         %12 = OpTypeFloat 32
         %13 = OpTypeVector %12 2
         %16 = OpConstant %12 0
         %17 = OpTypeBool
         %21 = OpConstant %10 2
         %22 = OpTypeArray %6 %21
         %23 = OpTypeStruct %22
         %24 = OpTypePointer Uniform %23
         %25 = OpVariable %24 Uniform
         %26 = OpConstant %6 0
         %27 = OpTypePointer Uniform %6
         %32 = OpConstant %6 1
         %43 = OpTypeVector %12 4
         %44 = OpTypePointer Output %43
         %45 = OpVariable %44 Output
         %65 = OpTypePointer Function %6
         %69 = OpConstant %10 0
         %70 = OpConstantFalse %17
         %71 = OpTypePointer Function %17
         %73 = OpConstantTrue %17
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %37 = OpFunctionCall %6 %8
         %38 = OpAccessChain %27 %25 %26 %26
         %39 = OpLoad %6 %38
         %40 = OpIEqual %17 %37 %39
               OpSelectionMerge %42 None
               OpBranchConditional %40 %41 %59
         %59 = OpLabel
         %60 = OpAccessChain %27 %25 %26 %32
         %61 = OpLoad %6 %60
         %62 = OpConvertSToF %12 %61
         %63 = OpCompositeConstruct %43 %62 %62 %62 %62
               OpStore %45 %63
               OpBranch %42
         %41 = OpLabel
         %48 = OpConvertSToF %12 %39
         %49 = OpAccessChain %27 %25 %26 %32
         %50 = OpLoad %6 %49
         %51 = OpConvertSToF %12 %50
         %58 = OpCompositeConstruct %43 %48 %51 %51 %48
               OpStore %45 %58
               OpBranch %42
         %42 = OpLabel
               OpReturn
               OpFunctionEnd
          %8 = OpFunction %6 None %7
          %9 = OpLabel
         %72 = OpVariable %71 Function %70
         %66 = OpVariable %65 Function
               OpSelectionMerge %64 None
               OpSwitch %69 %68
         %68 = OpLabel
         %14 = OpExtInst %13 %1 UnpackUnorm2x16 %11
         %15 = OpCompositeExtract %12 %14 1
         %18 = OpFOrdEqual %17 %15 %16
               OpSelectionMerge %20 None
               OpBranchConditional %18 %19 %31
         %31 = OpLabel
         %33 = OpAccessChain %27 %25 %26 %32
         %34 = OpLoad %6 %33
               OpStore %72 %73
               OpStore %66 %34
               OpBranch %64
         %19 = OpLabel
         %28 = OpAccessChain %27 %25 %26 %26
         %29 = OpLoad %6 %28
               OpStore %72 %73
               OpStore %66 %29
               OpBranch %64
         %20 = OpLabel
               OpUnreachable
         %64 = OpLabel
         %74 = OpPhi %6 %34 %31 %29 %19
               OpReturnValue %74
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
 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__GLF_uniform_int_values 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