#!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 a specific value tracking path

# 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 310 es
# #define _float_0_0 _GLF_uniform_float_values[0]
# #define _float_1_0 _GLF_uniform_float_values[1]
#
# precision highp float;
#
# // Contents of _GLF_uniform_float_values: [0.0, 1.0]
# layout(set = 0, binding = 0) uniform buf0
# {
#     float _GLF_uniform_float_values[2];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     // Always false.
#     if (inversesqrt(_float_1_0) < -1.0)
#     {
#         _GLF_color = vec4(_float_0_0);
#     }
#     else
#     {
#         _GLF_color = vec4(_float_1_0, _float_0_0, _float_0_0, _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; 8
; Bound: 41
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %27
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %10 "buf0"
               OpMemberName %10 0 "_GLF_uniform_float_values"
               OpName %12 ""
               OpName %27 "_GLF_color"
               OpDecorate %9 ArrayStride 16
               OpMemberDecorate %10 0 Offset 0
               OpDecorate %10 Block
               OpDecorate %12 DescriptorSet 0
               OpDecorate %12 Binding 0
               OpDecorate %27 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeInt 32 0
          %8 = OpConstant %7 2
          %9 = OpTypeArray %6 %8
         %10 = OpTypeStruct %9
         %11 = OpTypePointer Uniform %10
         %12 = OpVariable %11 Uniform
         %13 = OpTypeInt 32 1
         %14 = OpConstant %13 0
         %15 = OpConstant %13 1
         %16 = OpTypePointer Uniform %6
         %20 = OpConstant %6 -1
         %21 = OpTypeBool
         %25 = OpTypeVector %6 4
         %26 = OpTypePointer Output %25
         %27 = OpVariable %26 Output
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %17 = OpAccessChain %16 %12 %14 %15
         %18 = OpLoad %6 %17
         %19 = OpExtInst %6 %1 InverseSqrt %18
         %22 = OpFOrdLessThan %21 %19 %20
               OpSelectionMerge %24 None
               OpBranchConditional %22 %23 %31
         %23 = OpLabel
         %28 = OpAccessChain %16 %12 %14 %14
         %29 = OpLoad %6 %28
         %30 = OpCompositeConstruct %25 %29 %29 %29 %29
               OpStore %27 %30
               OpBranch %24
         %31 = OpLabel
         %32 = OpAccessChain %16 %12 %14 %15
         %33 = OpLoad %6 %32
         %34 = OpAccessChain %16 %12 %14 %14
         %35 = OpLoad %6 %34
         %36 = OpAccessChain %16 %12 %14 %14
         %37 = OpLoad %6 %36
         %38 = OpAccessChain %16 %12 %14 %15
         %39 = OpLoad %6 %38
         %40 = OpCompositeConstruct %25 %33 %35 %37 %39
               OpStore %27 %40
               OpBranch %24
         %24 = OpLabel
               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

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 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