#!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 the GraphicsFuzz project.

# Short description: A fragment shader that covers a specific simplify cfg 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
# #define _int_1 _GLF_uniform_int_values[0]
# #define _int_0 _GLF_uniform_int_values[1]
#
# precision highp float;
# precision highp int;
#
# // Contents of _GLF_uniform_int_values: [1, 0]
# layout(set = 0, binding = 0) uniform buf1
# {
#     int _GLF_uniform_int_values[2];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
#
#     // Always false.
#     if(_int_0 > _int_1)
#     {
#         do
#         {
#             _GLF_color = vec4(_int_1);
#         }
#         while(_int_0 > _int_1);
#
#         return;
#     }
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 55
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %9
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %9 "_GLF_color"
               OpName %14 "buf1"
               OpMemberName %14 0 "_GLF_uniform_int_values"
               OpName %16 ""
               OpDecorate %9 Location 0
               OpDecorate %13 ArrayStride 16
               OpMemberDecorate %14 0 Offset 0
               OpDecorate %14 Block
               OpDecorate %16 DescriptorSet 0
               OpDecorate %16 Binding 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 4
          %8 = OpTypePointer Output %7
          %9 = OpVariable %8 Output
         %10 = OpTypeInt 32 1
         %11 = OpTypeInt 32 0
         %12 = OpConstant %11 2
         %13 = OpTypeArray %10 %12
         %14 = OpTypeStruct %13
         %15 = OpTypePointer Uniform %14
         %16 = OpVariable %15 Uniform
         %17 = OpConstant %10 0
         %18 = OpTypePointer Uniform %10
         %22 = OpConstant %10 1
         %37 = OpTypeBool
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %19 = OpAccessChain %18 %16 %17 %17
         %20 = OpLoad %10 %19
         %21 = OpConvertSToF %6 %20
         %23 = OpAccessChain %18 %16 %17 %22
         %24 = OpLoad %10 %23
         %25 = OpConvertSToF %6 %24
         %26 = OpAccessChain %18 %16 %17 %22
         %27 = OpLoad %10 %26
         %28 = OpConvertSToF %6 %27
         %29 = OpAccessChain %18 %16 %17 %17
         %30 = OpLoad %10 %29
         %31 = OpConvertSToF %6 %30
         %32 = OpCompositeConstruct %7 %21 %25 %28 %31
               OpStore %9 %32
         %33 = OpAccessChain %18 %16 %17 %22
         %34 = OpLoad %10 %33
         %35 = OpAccessChain %18 %16 %17 %17
         %36 = OpLoad %10 %35
         %38 = OpSGreaterThan %37 %34 %36
               OpSelectionMerge %40 None
               OpBranchConditional %38 %39 %40
         %39 = OpLabel
               OpBranch %41
         %41 = OpLabel
               OpLoopMerge %43 %44 None
               OpBranch %42
         %42 = OpLabel
         %45 = OpAccessChain %18 %16 %17 %17
         %46 = OpLoad %10 %45
         %47 = OpConvertSToF %6 %46
         %48 = OpCompositeConstruct %7 %47 %47 %47 %47
               OpStore %9 %48
               OpBranch %44
         %44 = OpLabel
         %49 = OpAccessChain %18 %16 %17 %22
         %50 = OpLoad %10 %49
         %51 = OpAccessChain %18 %16 %17 %17
         %52 = OpLoad %10 %51
         %53 = OpSGreaterThan %37 %50 %52
               OpBranchConditional %53 %41 %43
         %43 = OpLabel
               OpReturn
         %40 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] 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 16 16
  BIND BUFFER variant_framebuffer AS color LOCATION 0
  BIND BUFFER variant__GLF_uniform_int_values 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 16 16

EXPECT variant_framebuffer IDX 0 0 SIZE 16 16 EQ_RGBA 255 0 0 255