#!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.

# Optimized using spirv-opt with the following arguments:
# '--copy-propagate-arrays'
# '--eliminate-dead-inserts'
# '--convert-local-access-chains'
# '--private-to-local'
# '--redundancy-elimination'
# '--eliminate-local-multi-store'
# '--eliminate-local-single-block'
# '--eliminate-dead-code-aggressive'
# '--copy-propagate-arrays'
# '--eliminate-dead-inserts'
# '--redundancy-elimination'
# '--eliminate-local-single-block'
# '--eliminate-local-single-store'
# '--eliminate-local-single-store'
# '--eliminate-dead-code-aggressive'
# '--inline-entry-points-exhaustive'
# '--combine-access-chains'
# '--eliminate-dead-branches'
# '--merge-return'
# '--eliminate-local-single-block'
# '--eliminate-dead-branches'
# '--reduce-load-size'
# '--eliminate-dead-inserts'
# '--copy-propagate-arrays'
# '--convert-local-access-chains'
# '--vector-dce'
# '--redundancy-elimination'
# '--eliminate-local-multi-store'
# '--redundancy-elimination'
# '--eliminate-dead-inserts'
# '--eliminate-dead-code-aggressive'
# spirv-opt commit hash: a0370efd589be33d5d9a85cfde2f85841b3755af


SHADER vertex texgen_vert PASSTHROUGH

SHADER fragment texgen_frag GLSL
#version 430
precision highp float;

layout(location = 0) out vec4 _GLF_color;

void main()
{
 _GLF_color = vec4(
 floor(gl_FragCoord.x) * (1.0 / 255.0),
 (int(gl_FragCoord.x) ^ int(gl_FragCoord.y)) * (1.0 / 255.0),
 floor(gl_FragCoord.y) * (1.0 / 255.0),
 1.0);
}
END
BUFFER default_texture FORMAT B8G8R8A8_UNORM

PIPELINE graphics texgen_pipeline
  ATTACH texgen_vert
  ATTACH texgen_frag
  FRAMEBUFFER_SIZE 256 256
  BIND BUFFER default_texture AS color LOCATION 0
END

CLEAR_COLOR texgen_pipeline 0 0 0 255
CLEAR texgen_pipeline
RUN texgen_pipeline DRAW_RECT POS 0 0  SIZE 256 256

SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 320 es
#
# precision highp float;
# precision highp int;
#
# const int _GLF_global_loop_bound = 10;
# int _GLF_global_loop_count = 0;
#
# struct S
# {
#     int data;
# };
#
# layout(set = 0, binding = 0) uniform sampler2D tex;
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     int a = 1;
#     int b = 1;
#     vec4 v = vec4(1.0);
#     S s = S(1);
#
#     // Iterated once.
#     while(v.x + 1.0 > 0.0 && s.data <= 1 && _GLF_global_loop_count < _GLF_global_loop_bound)
#     {
#         _GLF_global_loop_count++;
#
#         // Always false.
#         if(b++ > 3)
#         {
#             break;
#         }
#
#         // The sampled value doesn't matter because the loop will exit in any case.
#         v = texture(tex, vec2(1.0));
#
#         // This will cause the loop to exit.
#         s.data++;
#     }
#
#     // Always true.
#     if (s.data == 2)
#         _GLF_color = vec4(float(a), 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: 96
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %75
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %20 "S"
               OpMemberName %20 0 "data"
               OpName %60 "tex"
               OpName %75 "_GLF_color"
               OpDecorate %60 RelaxedPrecision
               OpDecorate %60 DescriptorSet 0
               OpDecorate %60 Binding 0
               OpDecorate %61 RelaxedPrecision
               OpDecorate %64 RelaxedPrecision
               OpDecorate %75 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %9 = OpConstant %6 0
         %12 = OpConstant %6 1
         %14 = OpTypeFloat 32
         %15 = OpTypeVector %14 4
         %18 = OpConstant %14 1
         %19 = OpConstantComposite %15 %18 %18 %18 %18
         %20 = OpTypeStruct %6
         %23 = OpConstantComposite %20 %12
         %29 = OpTypeBool
         %36 = OpConstant %14 0
         %45 = OpConstant %6 10
         %52 = OpConstant %6 3
         %57 = OpTypeImage %14 2D 0 0 0 1 Unknown
         %58 = OpTypeSampledImage %57
         %59 = OpTypePointer UniformConstant %58
         %60 = OpVariable %59 UniformConstant
         %62 = OpTypeVector %14 2
         %63 = OpConstantComposite %62 %18 %18
         %70 = OpConstant %6 2
         %74 = OpTypePointer Output %15
         %75 = OpVariable %74 Output
         %80 = OpConstantComposite %15 %36 %36 %36 %36
          %4 = OpFunction %2 None %3
          %5 = OpLabel
               OpBranch %24
         %24 = OpLabel
         %95 = OpPhi %20 %23 %5 %85 %27
         %94 = OpPhi %15 %19 %5 %64 %27
         %90 = OpPhi %6 %12 %5 %51 %27
         %88 = OpPhi %6 %9 %5 %49 %27
         %93 = OpPhi %6 %12 %5 %93 %27
               OpLoopMerge %26 %27 None
               OpBranch %28
         %28 = OpLabel
         %34 = OpCompositeExtract %14 %94 0
         %35 = OpFAdd %14 %34 %18
         %37 = OpFOrdGreaterThan %29 %35 %36
               OpSelectionMerge %39 None
               OpBranchConditional %37 %38 %39
         %38 = OpLabel
         %41 = OpCompositeExtract %6 %95 0
         %42 = OpSLessThanEqual %29 %41 %12
               OpBranch %39
         %39 = OpLabel
         %43 = OpPhi %29 %37 %28 %42 %38
         %46 = OpSLessThan %29 %88 %45
         %47 = OpLogicalAnd %29 %43 %46
               OpBranchConditional %47 %25 %26
         %25 = OpLabel
         %49 = OpIAdd %6 %88 %12
         %51 = OpIAdd %6 %90 %12
         %53 = OpSGreaterThan %29 %90 %52
               OpSelectionMerge %55 None
               OpBranchConditional %53 %54 %55
         %54 = OpLabel
               OpBranch %26
         %55 = OpLabel
         %61 = OpLoad %58 %60
         %64 = OpImageSampleImplicitLod %15 %61 %63
         %66 = OpCompositeExtract %6 %95 0
         %67 = OpIAdd %6 %66 %12
         %85 = OpCompositeInsert %20 %67 %95 0
               OpBranch %27
         %27 = OpLabel
               OpBranch %24
         %26 = OpLabel
         %69 = OpCompositeExtract %6 %95 0
         %71 = OpIEqual %29 %69 %70
               OpSelectionMerge %73 None
               OpBranchConditional %71 %72 %79
         %72 = OpLabel
         %77 = OpConvertSToF %14 %93
         %78 = OpCompositeConstruct %15 %77 %36 %36 %18
               OpStore %75 %78
               OpBranch %73
         %79 = OpLabel
               OpStore %75 %80
               OpBranch %73
         %73 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# GLF_live1tex
SAMPLER variant_GLF_live1tex


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 default_texture AS combined_image_sampler SAMPLER variant_GLF_live1tex 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