#!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 inlining optimization path.

# The test passes because 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;
#
# layout(location = 0) out vec4 _GLF_color;
#
# float func()
# {
#     float x = 2.0;
#     if (gl_FragCoord.x == 12.0)
#     {
#         if (gl_FragCoord.y == 13.0)
#         {
#             x += 1.0;
#         }
#         return x;
#     }
#
#     return 1.0;
# }
#
# void main()
# {
#     if (false)
#     {
#         _GLF_color = vec4(func());
#     }
#     else
#     {
#         _GLF_color = vec4(1, 0, 0, 1);
#     }
# }
SHADER fragment variant_fragment_shader SPIRV-ASM
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 50
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %15 %44
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "func("
               OpName %11 "x"
               OpName %15 "gl_FragCoord"
               OpName %44 "_GLF_color"
               OpDecorate %15 BuiltIn FragCoord
               OpDecorate %44 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeFunction %6
         %10 = OpTypePointer Function %6
         %12 = OpConstant %6 2
         %13 = OpTypeVector %6 4
         %14 = OpTypePointer Input %13
         %15 = OpVariable %14 Input
         %16 = OpTypeInt 32 0
         %17 = OpConstant %16 0
         %18 = OpTypePointer Input %6
         %21 = OpConstant %6 12
         %22 = OpTypeBool
         %26 = OpConstant %16 1
         %29 = OpConstant %6 13
         %33 = OpConstant %6 1
         %40 = OpConstantFalse %22
         %43 = OpTypePointer Output %13
         %44 = OpVariable %43 Output
         %48 = OpConstant %6 0
         %49 = OpConstantComposite %13 %33 %48 %48 %33
          %4 = OpFunction %2 None %3
          %5 = OpLabel
               OpSelectionMerge %42 None
               OpBranchConditional %40 %41 %47
         %41 = OpLabel
         %45 = OpFunctionCall %6 %8
         %46 = OpCompositeConstruct %13 %45 %45 %45 %45
               OpStore %44 %46
               OpBranch %42
         %47 = OpLabel
               OpStore %44 %49
               OpBranch %42
         %42 = OpLabel
               OpReturn
               OpFunctionEnd
          %8 = OpFunction %6 None %7
          %9 = OpLabel
         %11 = OpVariable %10 Function
               OpStore %11 %12
         %19 = OpAccessChain %18 %15 %17
         %20 = OpLoad %6 %19
         %23 = OpFOrdEqual %22 %20 %21
               OpSelectionMerge %25 None
               OpBranchConditional %23 %24 %25
         %24 = OpLabel
         %27 = OpAccessChain %18 %15 %26
         %28 = OpLoad %6 %27
         %30 = OpFOrdEqual %22 %28 %29
               OpSelectionMerge %32 None
               OpBranchConditional %30 %31 %32
         %31 = OpLabel
         %34 = OpLoad %6 %11
         %35 = OpFAdd %6 %34 %33
               OpStore %11 %35
               OpBranch %32
         %32 = OpLabel
         %36 = OpLoad %6 %11
               OpReturnValue %36
         %25 = OpLabel
               OpReturnValue %33
               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