#!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.

SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 320 es
# #define _int_1 _GLF_uniform_int_values[0]
# #define _int_0 _GLF_uniform_int_values[1]
#
# precision highp int;
# precision highp float;
#
# // Contents of _GLF_uniform_int_values: [1, 0]
# layout(set = 0, binding = 0) uniform buf0
# {
#     int _GLF_uniform_int_values[2];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# int func()
# {
#     int a = 1;
#     return (1 + a) - 1;
# }
#
# void main()
# {
#     // Always true.
#     if(func() == 1)
#     {
#         _GLF_color = vec4(_int_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: 53
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %26
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "func("
               OpName %11 "a"
               OpName %26 "_GLF_color"
               OpName %30 "buf0"
               OpMemberName %30 0 "_GLF_uniform_int_values"
               OpName %32 ""
               OpDecorate %26 Location 0
               OpDecorate %29 ArrayStride 16
               OpMemberDecorate %30 0 Offset 0
               OpDecorate %30 Block
               OpDecorate %32 DescriptorSet 0
               OpDecorate %32 Binding 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypeFunction %6
         %10 = OpTypePointer Function %6
         %12 = OpConstant %6 1
         %19 = OpTypeBool
         %23 = OpTypeFloat 32
         %24 = OpTypeVector %23 4
         %25 = OpTypePointer Output %24
         %26 = OpVariable %25 Output
         %27 = OpTypeInt 32 0
         %28 = OpConstant %27 2
         %29 = OpTypeArray %6 %28
         %30 = OpTypeStruct %29
         %31 = OpTypePointer Uniform %30
         %32 = OpVariable %31 Uniform
         %33 = OpConstant %6 0
         %34 = OpTypePointer Uniform %6
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %18 = OpFunctionCall %6 %8
         %20 = OpIEqual %19 %18 %12
               OpSelectionMerge %22 None
               OpBranchConditional %20 %21 %48
         %21 = OpLabel
         %35 = OpAccessChain %34 %32 %33 %33
         %36 = OpLoad %6 %35
         %37 = OpConvertSToF %23 %36
         %38 = OpAccessChain %34 %32 %33 %12
         %39 = OpLoad %6 %38
         %40 = OpConvertSToF %23 %39
         %41 = OpAccessChain %34 %32 %33 %12
         %42 = OpLoad %6 %41
         %43 = OpConvertSToF %23 %42
         %44 = OpAccessChain %34 %32 %33 %33
         %45 = OpLoad %6 %44
         %46 = OpConvertSToF %23 %45
         %47 = OpCompositeConstruct %24 %37 %40 %43 %46
               OpStore %26 %47
               OpBranch %22
         %48 = OpLabel
         %49 = OpAccessChain %34 %32 %33 %12
         %50 = OpLoad %6 %49
         %51 = OpConvertSToF %23 %50
         %52 = OpCompositeConstruct %24 %51 %51 %51 %51
               OpStore %26 %52
               OpBranch %22
         %22 = OpLabel
               OpReturn
               OpFunctionEnd
          %8 = OpFunction %6 None %7
          %9 = OpLabel
         %11 = OpVariable %10 Function
               OpStore %11 %12
         %13 = OpLoad %6 %11
         %14 = OpIAdd %6 %12 %13
         %15 = OpISub %6 %14 %12
               OpReturnValue %15
               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 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