#!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
#
# precision highp float;
# precision highp int;
#
# layout(set = 0, binding = 0) uniform buf0
# {
#     int one;
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     // Arithmetic shift replicates the sign bit.
#     int a = 0xffffffff >> one;
#     // Clamps to 2.0.
#     float f = clamp(5.0, 1.0, (a == 0xffffffff) ? 2.0 : 3.0);
#
#     // Always true.
#     if (int(f) == 2)
#         _GLF_color = vec4(1, 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: 43
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %38
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "a"
               OpName %10 "buf0"
               OpMemberName %10 0 "one"
               OpName %12 ""
               OpName %20 "f"
               OpName %38 "_GLF_color"
               OpMemberDecorate %10 0 Offset 0
               OpDecorate %10 Block
               OpDecorate %12 DescriptorSet 0
               OpDecorate %12 Binding 0
               OpDecorate %38 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 -1
         %10 = OpTypeStruct %6
         %11 = OpTypePointer Uniform %10
         %12 = OpVariable %11 Uniform
         %13 = OpConstant %6 0
         %14 = OpTypePointer Uniform %6
         %18 = OpTypeFloat 32
         %19 = OpTypePointer Function %18
         %21 = OpConstant %18 5
         %22 = OpConstant %18 1
         %24 = OpTypeBool
         %26 = OpConstant %18 2
         %27 = OpConstant %18 3
         %32 = OpConstant %6 2
         %36 = OpTypeVector %18 4
         %37 = OpTypePointer Output %36
         %38 = OpVariable %37 Output
         %39 = OpConstant %18 0
         %40 = OpConstantComposite %36 %22 %39 %39 %22
         %42 = OpConstantComposite %36 %39 %39 %39 %39
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %20 = OpVariable %19 Function
         %15 = OpAccessChain %14 %12 %13
         %16 = OpLoad %6 %15
         %17 = OpShiftRightArithmetic %6 %9 %16
               OpStore %8 %17
         %23 = OpLoad %6 %8
         %25 = OpIEqual %24 %23 %9
         %28 = OpSelect %18 %25 %26 %27
         %29 = OpExtInst %18 %1 FClamp %21 %22 %28
               OpStore %20 %29
         %30 = OpLoad %18 %20
         %31 = OpConvertFToS %6 %30
         %33 = OpIEqual %24 %31 %32
               OpSelectionMerge %35 None
               OpBranchConditional %33 %34 %41
         %34 = OpLabel
               OpStore %38 %40
               OpBranch %35
         %41 = OpLabel
               OpStore %38 %42
               OpBranch %35
         %35 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# one
BUFFER variant_one 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_one 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