#!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 DAG combiner 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 minusEight;
# };
# layout(set = 0, binding = 1) uniform buf1
# {
#     int ten;
# };
#
# void main()
# {
#     int a = 0;
#     int b = 0;
#
#     for(int i = 0; i < ten; i++)
#     {
#         // Breaks when i == 3.
#         if(a > 5)
#             break;
#
#         // Increments a by 2.
#         a += minusEight / -4;
#         b++;
#     }
#
#     if (b == 3)
#         _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: 60
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %54
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "a"
               OpName %10 "b"
               OpName %11 "i"
               OpName %18 "buf1"
               OpMemberName %18 0 "ten"
               OpName %20 ""
               OpName %32 "buf0"
               OpMemberName %32 0 "minusEight"
               OpName %34 ""
               OpName %54 "_GLF_color"
               OpMemberDecorate %18 0 Offset 0
               OpDecorate %18 Block
               OpDecorate %20 DescriptorSet 0
               OpDecorate %20 Binding 1
               OpMemberDecorate %32 0 Offset 0
               OpDecorate %32 Block
               OpDecorate %34 DescriptorSet 0
               OpDecorate %34 Binding 0
               OpDecorate %54 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 0
         %18 = OpTypeStruct %6
         %19 = OpTypePointer Uniform %18
         %20 = OpVariable %19 Uniform
         %21 = OpTypePointer Uniform %6
         %24 = OpTypeBool
         %27 = OpConstant %6 5
         %32 = OpTypeStruct %6
         %33 = OpTypePointer Uniform %32
         %34 = OpVariable %33 Uniform
         %37 = OpConstant %6 -4
         %42 = OpConstant %6 1
         %47 = OpConstant %6 3
         %51 = OpTypeFloat 32
         %52 = OpTypeVector %51 4
         %53 = OpTypePointer Output %52
         %54 = OpVariable %53 Output
         %55 = OpConstant %51 1
         %56 = OpConstant %51 0
         %57 = OpConstantComposite %52 %55 %56 %56 %55
         %59 = OpConstantComposite %52 %56 %56 %56 %56
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %10 = OpVariable %7 Function
         %11 = OpVariable %7 Function
               OpStore %8 %9
               OpStore %10 %9
               OpStore %11 %9
               OpBranch %12
         %12 = OpLabel
               OpLoopMerge %14 %15 None
               OpBranch %16
         %16 = OpLabel
         %17 = OpLoad %6 %11
         %22 = OpAccessChain %21 %20 %9
         %23 = OpLoad %6 %22
         %25 = OpSLessThan %24 %17 %23
               OpBranchConditional %25 %13 %14
         %13 = OpLabel
         %26 = OpLoad %6 %8
         %28 = OpSGreaterThan %24 %26 %27
               OpSelectionMerge %30 None
               OpBranchConditional %28 %29 %30
         %29 = OpLabel
               OpBranch %14
         %30 = OpLabel
         %35 = OpAccessChain %21 %34 %9
         %36 = OpLoad %6 %35
         %38 = OpSDiv %6 %36 %37
         %39 = OpLoad %6 %8
         %40 = OpIAdd %6 %39 %38
               OpStore %8 %40
         %41 = OpLoad %6 %10
         %43 = OpIAdd %6 %41 %42
               OpStore %10 %43
               OpBranch %15
         %15 = OpLabel
         %44 = OpLoad %6 %11
         %45 = OpIAdd %6 %44 %42
               OpStore %11 %45
               OpBranch %12
         %14 = OpLabel
         %46 = OpLoad %6 %10
         %48 = OpIEqual %24 %46 %47
               OpSelectionMerge %50 None
               OpBranchConditional %48 %49 %58
         %49 = OpLabel
               OpStore %54 %57
               OpBranch %50
         %58 = OpLabel
               OpStore %54 %59
               OpBranch %50
         %50 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# minuseight
BUFFER variant_minuseight DATA_TYPE int32 DATA
 -8
END
# ten
BUFFER variant_ten DATA_TYPE int32 DATA
 10
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_minuseight AS uniform DESCRIPTOR_SET 0 BINDING 0
  BIND BUFFER variant_ten AS uniform DESCRIPTOR_SET 0 BINDING 1
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