#!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 constant 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;
#
# layout(location = 0) out vec4 _GLF_color;
# layout(set = 0, binding = 0) uniform buf0
# {
#     float one;
# };
#
# void main()
# {
#     float f = 1.0;
#
#     do
#     {
#         f += one;
#     }
#     while(10.0 > clamp(f, 8.0, 9.0 + one));
#
#     if (f == 10.0)
#         _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: 45
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %40
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "f"
               OpName %14 "buf0"
               OpMemberName %14 0 "one"
               OpName %16 ""
               OpName %40 "_GLF_color"
               OpMemberDecorate %14 0 Offset 0
               OpDecorate %14 Block
               OpDecorate %16 DescriptorSet 0
               OpDecorate %16 Binding 0
               OpDecorate %40 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 1
         %14 = OpTypeStruct %6
         %15 = OpTypePointer Uniform %14
         %16 = OpVariable %15 Uniform
         %17 = OpTypeInt 32 1
         %18 = OpConstant %17 0
         %19 = OpTypePointer Uniform %6
         %24 = OpConstant %6 10
         %26 = OpConstant %6 8
         %27 = OpConstant %6 9
         %32 = OpTypeBool
         %38 = OpTypeVector %6 4
         %39 = OpTypePointer Output %38
         %40 = OpVariable %39 Output
         %41 = OpConstant %6 0
         %42 = OpConstantComposite %38 %9 %41 %41 %9
         %44 = OpConstantComposite %38 %41 %41 %41 %41
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
               OpStore %8 %9
               OpBranch %10
         %10 = OpLabel
               OpLoopMerge %12 %13 None
               OpBranch %11
         %11 = OpLabel
         %20 = OpAccessChain %19 %16 %18
         %21 = OpLoad %6 %20
         %22 = OpLoad %6 %8
         %23 = OpFAdd %6 %22 %21
               OpStore %8 %23
               OpBranch %13
         %13 = OpLabel
         %25 = OpLoad %6 %8
         %28 = OpAccessChain %19 %16 %18
         %29 = OpLoad %6 %28
         %30 = OpFAdd %6 %27 %29
         %31 = OpExtInst %6 %1 FClamp %25 %26 %30
         %33 = OpFOrdGreaterThan %32 %24 %31
               OpBranchConditional %33 %10 %12
         %12 = OpLabel
         %34 = OpLoad %6 %8
         %35 = OpFOrdEqual %32 %34 %24
               OpSelectionMerge %37 None
               OpBranchConditional %35 %36 %43
         %36 = OpLabel
               OpStore %40 %42
               OpBranch %37
         %43 = OpLabel
               OpStore %40 %44
               OpBranch %37
         %37 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# one
BUFFER variant_one DATA_TYPE float 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