#!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
# #define _float_0_0 _GLF_uniform_float_values[0]
#
# precision highp float;
# precision highp int;
#
# // Contents of _GLF_uniform_float_values: 0.0
# layout(set = 0, binding = 0) uniform buf0
# {
#     float _GLF_uniform_float_values[1];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     float f;
#
#     // f is uninitialized, but 1.0 is selected from the first vector.
#     _GLF_color = mix(vec4(1.0), vec4(f, 0.0, 0.0, 1.0), bvec4(gl_FragCoord.y < _float_0_0, true, true, true));
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 39
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %9 %18
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %9 "_GLF_color"
               OpName %13 "f"
               OpName %18 "gl_FragCoord"
               OpName %25 "buf0"
               OpMemberName %25 0 "_GLF_uniform_float_values"
               OpName %27 ""
               OpDecorate %9 Location 0
               OpDecorate %18 BuiltIn FragCoord
               OpDecorate %24 ArrayStride 16
               OpMemberDecorate %25 0 Offset 0
               OpDecorate %25 Block
               OpDecorate %27 DescriptorSet 0
               OpDecorate %27 Binding 0
          %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 = OpConstantComposite %7 %10 %10 %10 %10
         %12 = OpTypePointer Function %6
         %15 = OpConstant %6 0
         %17 = OpTypePointer Input %7
         %18 = OpVariable %17 Input
         %19 = OpTypeInt 32 0
         %20 = OpConstant %19 1
         %21 = OpTypePointer Input %6
         %24 = OpTypeArray %6 %20
         %25 = OpTypeStruct %24
         %26 = OpTypePointer Uniform %25
         %27 = OpVariable %26 Uniform
         %28 = OpTypeInt 32 1
         %29 = OpConstant %28 0
         %30 = OpTypePointer Uniform %6
         %33 = OpTypeBool
         %35 = OpConstantTrue %33
         %36 = OpTypeVector %33 4
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %13 = OpVariable %12 Function
         %14 = OpLoad %6 %13
         %16 = OpCompositeConstruct %7 %14 %15 %15 %10
         %22 = OpAccessChain %21 %18 %20
         %23 = OpLoad %6 %22
         %31 = OpAccessChain %30 %27 %29 %29
         %32 = OpLoad %6 %31
         %34 = OpFOrdLessThan %33 %23 %32
         %37 = OpCompositeConstruct %36 %34 %35 %35 %35
         %38 = OpSelect %7 %37 %16 %11
               OpStore %9 %38
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_float_values
BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
 0.0
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__GLF_uniform_float_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 32 32

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