#!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 coverage-gap found by GraphicsFuzz.

# Short description: A fragment shader that covers a specific instruction simplification code path

# The test passes because the shader always writes red.

SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
# precision highp float;
# precision highp int;
#
# layout(location = 0) out vec4 _GLF_color;
#
# layout(set = 0, binding = 0) uniform buf0
# {
#     int three;
# };
#
# void main()
# {
#     // Always true.
#     if(three > 1 && !(gl_FragCoord.y < -5.0))
#         _GLF_color = vec4(1, 0, 0, 1);
#     else
#         _GLF_color = vec4(0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 41
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %22 %35
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "buf0"
               OpMemberName %8 0 "three"
               OpName %10 ""
               OpName %22 "gl_FragCoord"
               OpName %35 "_GLF_color"
               OpMemberDecorate %8 0 Offset 0
               OpDecorate %8 Block
               OpDecorate %10 DescriptorSet 0
               OpDecorate %10 Binding 0
               OpDecorate %22 BuiltIn FragCoord
               OpDecorate %35 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeBool
          %7 = OpTypeInt 32 1
          %8 = OpTypeStruct %7
          %9 = OpTypePointer Uniform %8
         %10 = OpVariable %9 Uniform
         %11 = OpConstant %7 0
         %12 = OpTypePointer Uniform %7
         %15 = OpConstant %7 1
         %19 = OpTypeFloat 32
         %20 = OpTypeVector %19 4
         %21 = OpTypePointer Input %20
         %22 = OpVariable %21 Input
         %23 = OpTypeInt 32 0
         %24 = OpConstant %23 1
         %25 = OpTypePointer Input %19
         %28 = OpConstant %19 -5
         %34 = OpTypePointer Output %20
         %35 = OpVariable %34 Output
         %36 = OpConstant %19 1
         %37 = OpConstant %19 0
         %38 = OpConstantComposite %20 %36 %37 %37 %36
         %40 = OpConstantComposite %20 %37 %37 %37 %37
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %13 = OpAccessChain %12 %10 %11
         %14 = OpLoad %7 %13
         %16 = OpSGreaterThan %6 %14 %15
               OpSelectionMerge %18 None
               OpBranchConditional %16 %17 %18
         %17 = OpLabel
         %26 = OpAccessChain %25 %22 %24
         %27 = OpLoad %19 %26
         %29 = OpFOrdLessThan %6 %27 %28
         %30 = OpLogicalNot %6 %29
               OpBranch %18
         %18 = OpLabel
         %31 = OpPhi %6 %16 %5 %30 %17
               OpSelectionMerge %33 None
               OpBranchConditional %31 %32 %39
         %32 = OpLabel
               OpStore %35 %38
               OpBranch %33
         %39 = OpLabel
               OpStore %35 %40
               OpBranch %33
         %33 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# three
BUFFER variant_three DATA_TYPE int32 DATA
 3
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_three 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