#!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 specific NIR 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
# #define _int_0 _GLF_uniform_int_values[0]
# #define _int_1 _GLF_uniform_int_values[1]
#
# precision highp float;
# precision highp int;
#
# // Contents of _GLF_uniform_int_values: [0, 1]
# layout(set = 0, binding = 0) uniform buf0
# {
#     int _GLF_uniform_int_values[2];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     int a = 1;
#
#     do
#     {
#         // Always true.
#         if(a >= _int_0)
#         {
#             break;
#         }
#
#         // Never executed as the break above is always hit.
#         if (true)
#         {
#             discard;
#         }
#
#         a++;
#     }
#     while(a != 1);
#
#     // Always true.
#     if(a == 1)
#     {
#         _GLF_color = vec4(1, _int_0, _int_0, _int_1);
#     }
#     else
#     {
#         _GLF_color = vec4(_int_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: 62
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %45
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "a"
               OpName %18 "buf0"
               OpMemberName %18 0 "_GLF_uniform_int_values"
               OpName %20 ""
               OpName %45 "_GLF_color"
               OpDecorate %17 ArrayStride 16
               OpMemberDecorate %18 0 Offset 0
               OpDecorate %18 Block
               OpDecorate %20 DescriptorSet 0
               OpDecorate %20 Binding 0
               OpDecorate %45 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 1
         %15 = OpTypeInt 32 0
         %16 = OpConstant %15 2
         %17 = OpTypeArray %6 %16
         %18 = OpTypeStruct %17
         %19 = OpTypePointer Uniform %18
         %20 = OpVariable %19 Uniform
         %21 = OpConstant %6 0
         %22 = OpTypePointer Uniform %6
         %25 = OpTypeBool
         %30 = OpConstantTrue %25
         %42 = OpTypeFloat 32
         %43 = OpTypeVector %42 4
         %44 = OpTypePointer Output %43
         %45 = OpVariable %44 Output
         %46 = OpConstant %42 1
          %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
         %14 = OpLoad %6 %8
         %23 = OpAccessChain %22 %20 %21 %21
         %24 = OpLoad %6 %23
         %26 = OpSGreaterThanEqual %25 %14 %24
               OpSelectionMerge %28 None
               OpBranchConditional %26 %27 %28
         %27 = OpLabel
               OpBranch %12
         %28 = OpLabel
               OpSelectionMerge %32 None
               OpBranchConditional %30 %31 %32
         %31 = OpLabel
               OpKill
         %32 = OpLabel
         %34 = OpLoad %6 %8
         %35 = OpIAdd %6 %34 %9
               OpStore %8 %35
               OpBranch %13
         %13 = OpLabel
         %36 = OpLoad %6 %8
         %37 = OpINotEqual %25 %36 %9
               OpBranchConditional %37 %10 %12
         %12 = OpLabel
         %38 = OpLoad %6 %8
         %39 = OpIEqual %25 %38 %9
               OpSelectionMerge %41 None
               OpBranchConditional %39 %40 %57
         %40 = OpLabel
         %47 = OpAccessChain %22 %20 %21 %21
         %48 = OpLoad %6 %47
         %49 = OpConvertSToF %42 %48
         %50 = OpAccessChain %22 %20 %21 %21
         %51 = OpLoad %6 %50
         %52 = OpConvertSToF %42 %51
         %53 = OpAccessChain %22 %20 %21 %9
         %54 = OpLoad %6 %53
         %55 = OpConvertSToF %42 %54
         %56 = OpCompositeConstruct %43 %46 %49 %52 %55
               OpStore %45 %56
               OpBranch %41
         %57 = OpLabel
         %58 = OpAccessChain %22 %20 %21 %21
         %59 = OpLoad %6 %58
         %60 = OpConvertSToF %42 %59
         %61 = OpCompositeConstruct %43 %60 %60 %60 %60
               OpStore %45 %61
               OpBranch %41
         %41 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
 0 1
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__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 256 256

EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255