#!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 value tracking 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 two;
# };
#
# void main()
# {
#   int a = 0;
#   for (int i = 0; i < 2; i++)
#   {
#     a = (i | -2) - 1;
#   }
#
#   if (a == -2)
#   {
#     _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: 43
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %34
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "a"
               OpName %10 "i"
               OpName %34 "_GLF_color"
               OpName %40 "buf0"
               OpMemberName %40 0 "two"
               OpName %42 ""
               OpDecorate %34 Location 0
               OpMemberDecorate %40 0 Offset 0
               OpDecorate %40 Block
               OpDecorate %42 DescriptorSet 0
               OpDecorate %42 Binding 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 0
         %17 = OpConstant %6 2
         %18 = OpTypeBool
         %21 = OpConstant %6 -2
         %23 = OpConstant %6 1
         %31 = OpTypeFloat 32
         %32 = OpTypeVector %31 4
         %33 = OpTypePointer Output %32
         %34 = OpVariable %33 Output
         %35 = OpConstant %31 1
         %36 = OpConstant %31 0
         %37 = OpConstantComposite %32 %35 %36 %36 %35
         %39 = OpConstantComposite %32 %36 %36 %36 %36
         %40 = OpTypeStruct %6
         %41 = OpTypePointer Uniform %40
         %42 = OpVariable %41 Uniform
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %10 = OpVariable %7 Function
               OpStore %8 %9
               OpStore %10 %9
               OpBranch %11
         %11 = OpLabel
               OpLoopMerge %13 %14 None
               OpBranch %15
         %15 = OpLabel
         %16 = OpLoad %6 %10
         %19 = OpSLessThan %18 %16 %17
               OpBranchConditional %19 %12 %13
         %12 = OpLabel
         %20 = OpLoad %6 %10
         %22 = OpBitwiseOr %6 %20 %21
         %24 = OpISub %6 %22 %23
               OpStore %8 %24
               OpBranch %14
         %14 = OpLabel
         %25 = OpLoad %6 %10
         %26 = OpIAdd %6 %25 %23
               OpStore %10 %26
               OpBranch %11
         %13 = OpLabel
         %27 = OpLoad %6 %8
         %28 = OpIEqual %18 %27 %21
               OpSelectionMerge %30 None
               OpBranchConditional %28 %29 %38
         %29 = OpLabel
               OpStore %34 %37
               OpBranch %30
         %38 = OpLabel
               OpStore %34 %39
               OpBranch %30
         %30 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# two
BUFFER variant_two DATA_TYPE int32 DATA
 2
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_two 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