#!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 _float_0_0 _GLF_uniform_float_values[0]
# #define _float_1_0 _GLF_uniform_float_values[1]
#
# precision highp int;
# precision highp float;
#
# // Contents of _GLF_uniform_int_values: 1
# layout(set = 0, binding = 0) uniform buf0
# {
#     int _GLF_uniform_int_values[1];
# };
#
# // Contents of _GLF_uniform_float_values: [0.0, 1.0]
# layout(set = 0, binding = 1) uniform buf1
# {
#     float _GLF_uniform_float_values[2];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     vec4 v;
#     // _GLF_color becomes (1, 1, 1, 1). Vector v is uninitialized, but none of it's values are selected.
#     _GLF_color = mix(vec4(1.0, v[_int_1], 1.0, 1.0), vec4(1), bvec4(true, true, gl_FragCoord.y > _float_0_0, true));
#     // Adjust the color to (1, 0, 0, 1).
#     _GLF_color.yz -= _float_1_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: 58
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %9 %32
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %9 "_GLF_color"
               OpName %12 "v"
               OpName %17 "buf0"
               OpMemberName %17 0 "_GLF_uniform_int_values"
               OpName %19 ""
               OpName %32 "gl_FragCoord"
               OpName %38 "buf1"
               OpMemberName %38 0 "_GLF_uniform_float_values"
               OpName %40 ""
               OpDecorate %9 Location 0
               OpDecorate %16 ArrayStride 16
               OpMemberDecorate %17 0 Offset 0
               OpDecorate %17 Block
               OpDecorate %19 DescriptorSet 0
               OpDecorate %19 Binding 0
               OpDecorate %32 BuiltIn FragCoord
               OpDecorate %37 ArrayStride 16
               OpMemberDecorate %38 0 Offset 0
               OpDecorate %38 Block
               OpDecorate %40 DescriptorSet 0
               OpDecorate %40 Binding 1
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 4
          %8 = OpTypePointer Output %7
          %9 = OpVariable %8 Output
         %10 = OpConstant %6 1
         %11 = OpTypePointer Function %7
         %13 = OpTypeInt 32 1
         %14 = OpTypeInt 32 0
         %15 = OpConstant %14 1
         %16 = OpTypeArray %13 %15
         %17 = OpTypeStruct %16
         %18 = OpTypePointer Uniform %17
         %19 = OpVariable %18 Uniform
         %20 = OpConstant %13 0
         %21 = OpTypePointer Uniform %13
         %24 = OpTypePointer Function %6
         %28 = OpConstantComposite %7 %10 %10 %10 %10
         %29 = OpTypeBool
         %30 = OpConstantTrue %29
         %31 = OpTypePointer Input %7
         %32 = OpVariable %31 Input
         %33 = OpTypePointer Input %6
         %36 = OpConstant %14 2
         %37 = OpTypeArray %6 %36
         %38 = OpTypeStruct %37
         %39 = OpTypePointer Uniform %38
         %40 = OpVariable %39 Uniform
         %41 = OpTypePointer Uniform %6
         %45 = OpTypeVector %29 4
         %48 = OpConstant %13 1
         %51 = OpTypeVector %6 2
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %12 = OpVariable %11 Function
         %22 = OpAccessChain %21 %19 %20 %20
         %23 = OpLoad %13 %22
         %25 = OpAccessChain %24 %12 %23
         %26 = OpLoad %6 %25
         %27 = OpCompositeConstruct %7 %10 %26 %10 %10
         %34 = OpAccessChain %33 %32 %15
         %35 = OpLoad %6 %34
         %42 = OpAccessChain %41 %40 %20 %20
         %43 = OpLoad %6 %42
         %44 = OpFOrdGreaterThan %29 %35 %43
         %46 = OpCompositeConstruct %45 %30 %30 %44 %30
         %47 = OpSelect %7 %46 %28 %27
               OpStore %9 %47
         %49 = OpAccessChain %41 %40 %20 %48
         %50 = OpLoad %6 %49
         %52 = OpLoad %7 %9
         %53 = OpVectorShuffle %51 %52 %52 1 2
         %54 = OpCompositeConstruct %51 %50 %50
         %55 = OpFSub %51 %53 %54
         %56 = OpLoad %7 %9
         %57 = OpVectorShuffle %7 %56 %55 0 4 5 3
               OpStore %9 %57
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_float_values
BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
 0.0 1.0
END
# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values 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 256 256
  BIND BUFFER variant_framebuffer AS color LOCATION 0
  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 1
  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