#!amber

# Copyright 2021 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 the GraphicsFuzz project.

# Short description: A fragment shader that covers specific LLVM code paths

# 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 320 es
#
# precision highp int;
# precision highp float;
#
# layout(location = 0) out vec4 _GLF_color;
#
# // Contents of one: 1.0
# layout(set = 0, binding = 0) uniform buf0
# {
#     float one;
# };
#
# void main()
# {
#     int a = 1;
#
#     // Iterated until the break is executed.
#     while(int(one) >= 1)
#     {
#         if(a++ >= 5)
#         {
#             _GLF_color = vec4(1, 0, 0, 1);
#             break;
#         }
#     }
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 39
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %34
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "a"
               OpName %16 "buf0"
               OpMemberName %16 0 "one"
               OpName %18 ""
               OpName %34 "_GLF_color"
               OpMemberDecorate %16 0 Offset 0
               OpDecorate %16 Block
               OpDecorate %18 DescriptorSet 0
               OpDecorate %18 Binding 0
               OpDecorate %34 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 1
         %15 = OpTypeFloat 32
         %16 = OpTypeStruct %15
         %17 = OpTypePointer Uniform %16
         %18 = OpVariable %17 Uniform
         %19 = OpConstant %6 0
         %20 = OpTypePointer Uniform %15
         %24 = OpTypeBool
         %28 = OpConstant %6 5
         %32 = OpTypeVector %15 4
         %33 = OpTypePointer Output %32
         %34 = OpVariable %33 Output
         %35 = OpConstant %15 1
         %36 = OpConstant %15 0
         %37 = OpConstantComposite %32 %35 %36 %36 %35
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
               OpStore %8 %9
               OpBranch %10
         %10 = OpLabel
               OpLoopMerge %12 %13 None
               OpBranch %14
         %14 = OpLabel
         %21 = OpAccessChain %20 %18 %19
         %22 = OpLoad %15 %21
         %23 = OpConvertFToS %6 %22
         %25 = OpSGreaterThanEqual %24 %23 %9
               OpBranchConditional %25 %11 %12
         %11 = OpLabel
         %26 = OpLoad %6 %8
         %27 = OpIAdd %6 %26 %9
               OpStore %8 %27
         %29 = OpSGreaterThanEqual %24 %26 %28
               OpSelectionMerge %31 None
               OpBranchConditional %29 %30 %31
         %30 = OpLabel
               OpStore %34 %37
               OpBranch %12
         %31 = OpLabel
               OpBranch %13
         %13 = OpLabel
               OpBranch %10
         %12 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# one
BUFFER variant_one DATA_TYPE float STD140 DATA
 1.0
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_one 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