#!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 folding 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;
# precision highp int;
#
# layout(location = 0) out vec4 _GLF_color;
#
# layout(set = 0, binding = 0) uniform buf0
# {
#     int minusOne;
# };
#
# void main()
# {
#     int minValue = -2147483648;
#     int negMinValue = -minValue;
#
#     if (negMinValue == minValue * minusOne)
#         _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: 36
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %30
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "minValue"
               OpName %10 "negMinValue"
               OpName %15 "buf0"
               OpMemberName %15 0 "minusOne"
               OpName %17 ""
               OpName %30 "_GLF_color"
               OpMemberDecorate %15 0 Offset 0
               OpDecorate %15 Block
               OpDecorate %17 DescriptorSet 0
               OpDecorate %17 Binding 0
               OpDecorate %30 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 -2147483648
         %15 = OpTypeStruct %6
         %16 = OpTypePointer Uniform %15
         %17 = OpVariable %16 Uniform
         %18 = OpConstant %6 0
         %19 = OpTypePointer Uniform %6
         %23 = OpTypeBool
         %27 = OpTypeFloat 32
         %28 = OpTypeVector %27 4
         %29 = OpTypePointer Output %28
         %30 = OpVariable %29 Output
         %31 = OpConstant %27 1
         %32 = OpConstant %27 0
         %33 = OpConstantComposite %28 %31 %32 %32 %31
         %35 = OpConstantComposite %28 %32 %32 %32 %32
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %10 = OpVariable %7 Function
               OpStore %8 %9
         %11 = OpLoad %6 %8
         %12 = OpSNegate %6 %11
               OpStore %10 %12
         %13 = OpLoad %6 %10
         %14 = OpLoad %6 %8
         %20 = OpAccessChain %19 %17 %18
         %21 = OpLoad %6 %20
         %22 = OpIMul %6 %14 %21
         %24 = OpIEqual %23 %13 %22
               OpSelectionMerge %26 None
               OpBranchConditional %24 %25 %34
         %25 = OpLabel
               OpStore %30 %33
               OpBranch %26
         %34 = OpLabel
               OpStore %30 %35
               OpBranch %26
         %26 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# minusOne
BUFFER variant_minusOne DATA_TYPE int32 DATA
 -1
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_minusOne 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