#!amber

# Copyright 2022 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 float;
# precision highp int;
#
# // Contents of one: 1
# layout(push_constant) uniform buf_push
# {
#     int one;
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     int a = 100;
#
#     do
#     {
#         // Always false.
#         if(one < 1)
#         {
#             break;
#         }
#
#         a--;
#     }
#     while(a > 1);
#
#     // Always true.
#     if(a == 1)
#     {
#         _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; 10
; Bound: 44
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %38
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "a"
               OpName %14 "buf_push"
               OpMemberName %14 0 "one"
               OpName %16 ""
               OpName %38 "_GLF_color"
               OpMemberDecorate %14 0 Offset 0
               OpDecorate %14 Block
               OpDecorate %38 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 100
         %14 = OpTypeStruct %6
         %15 = OpTypePointer PushConstant %14
         %16 = OpVariable %15 PushConstant
         %17 = OpConstant %6 0
         %18 = OpTypePointer PushConstant %6
         %21 = OpConstant %6 1
         %22 = OpTypeBool
         %35 = OpTypeFloat 32
         %36 = OpTypeVector %35 4
         %37 = OpTypePointer Output %36
         %38 = OpVariable %37 Output
         %39 = OpConstant %35 1
         %40 = OpConstant %35 0
         %41 = OpConstantComposite %36 %39 %40 %40 %39
         %43 = OpConstantComposite %36 %40 %40 %40 %40
          %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
         %19 = OpAccessChain %18 %16 %17
         %20 = OpLoad %6 %19
         %23 = OpSLessThan %22 %20 %21
               OpSelectionMerge %25 None
               OpBranchConditional %23 %24 %25
         %24 = OpLabel
               OpBranch %12
         %25 = OpLabel
         %27 = OpLoad %6 %8
         %28 = OpISub %6 %27 %21
               OpStore %8 %28
               OpBranch %13
         %13 = OpLabel
         %29 = OpLoad %6 %8
         %30 = OpSGreaterThan %22 %29 %21
               OpBranchConditional %30 %10 %12
         %12 = OpLabel
         %31 = OpLoad %6 %8
         %32 = OpIEqual %22 %31 %21
               OpSelectionMerge %34 None
               OpBranchConditional %32 %33 %42
         %33 = OpLabel
               OpStore %38 %41
               OpBranch %34
         %42 = OpLabel
               OpStore %38 %43
               OpBranch %34
         %34 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# one
BUFFER variant_one DATA_TYPE int32 STD140 DATA
 1
END

BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM

PIPELINE graphics variant_pipeline
  ATTACH variant_vertex_shader
  ATTACH variant_fragment_shader
  FRAMEBUFFER_SIZE 32 32
  BIND BUFFER variant_framebuffer AS color LOCATION 0
  BIND BUFFER variant_one AS push_constant
END
CLEAR_COLOR variant_pipeline 0 0 0 255

CLEAR variant_pipeline
RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32

EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255