#!amber

# Copyright 2019 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 bug found by GraphicsFuzz.

# Short description: A fragment shader with an expression used in two discard guards

# The test passes because most of the code never executes; the shader just writes the color red.

SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
# precision highp float;
# precision highp int;
#
# layout(set = 0, binding = 0) uniform buf0
# {
#   vec2 injectionSwitch;
# };
# layout(location = 0) out vec4 _GLF_color;
#
# mediump vec4 gv;
#
# void main()
# {
#   if (injectionSwitch.x > 2.0) // always false
#   {
#     int temp = int(max(mix(vec4(1.0), vec4(1.0), gv), 8.6)[1]);
#
#     if (temp < 150)
#     {
#       discard;
#     }
#
#     if (temp < 180)
#     {
#       discard;
#     }
#   }
#   _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 7
; Bound: 54
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %51
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "buf0"
               OpMemberName %8 0 "injectionSwitch"
               OpName %10 ""
               OpName %24 "temp"
               OpName %29 "gv"
               OpName %51 "_GLF_color"
               OpMemberDecorate %8 0 Offset 0
               OpDecorate %8 Block
               OpDecorate %10 DescriptorSet 0
               OpDecorate %10 Binding 0
               OpDecorate %29 RelaxedPrecision
               OpDecorate %30 RelaxedPrecision
               OpDecorate %31 RelaxedPrecision
               OpDecorate %33 RelaxedPrecision
               OpDecorate %34 RelaxedPrecision
               OpDecorate %36 RelaxedPrecision
               OpDecorate %51 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 2
          %8 = OpTypeStruct %7
          %9 = OpTypePointer Uniform %8
         %10 = OpVariable %9 Uniform
         %11 = OpTypeInt 32 1
         %12 = OpConstant %11 0
         %13 = OpTypeInt 32 0
         %14 = OpConstant %13 0
         %15 = OpTypePointer Uniform %6
         %18 = OpConstant %6 2
         %19 = OpTypeBool
         %23 = OpTypePointer Function %11
         %25 = OpTypeVector %6 4
         %26 = OpConstant %6 1
         %27 = OpConstantComposite %25 %26 %26 %26 %26
         %28 = OpTypePointer Private %25
         %29 = OpVariable %28 Private
         %32 = OpConstant %6 8.60000038
         %35 = OpConstant %13 1
         %39 = OpConstant %11 150
         %45 = OpConstant %11 180
         %50 = OpTypePointer Output %25
         %51 = OpVariable %50 Output
         %52 = OpConstant %6 0
         %53 = OpConstantComposite %25 %26 %52 %52 %26
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %24 = OpVariable %23 Function
         %16 = OpAccessChain %15 %10 %12 %14
         %17 = OpLoad %6 %16
         %20 = OpFOrdGreaterThan %19 %17 %18
               OpSelectionMerge %22 None
               OpBranchConditional %20 %21 %22
         %21 = OpLabel
         %30 = OpLoad %25 %29
         %31 = OpExtInst %25 %1 FMix %27 %27 %30
         %33 = OpCompositeConstruct %25 %32 %32 %32 %32
         %34 = OpExtInst %25 %1 FMax %31 %33
         %36 = OpCompositeExtract %6 %34 1
         %37 = OpConvertFToS %11 %36
               OpStore %24 %37
         %38 = OpLoad %11 %24
         %40 = OpSLessThan %19 %38 %39
               OpSelectionMerge %42 None
               OpBranchConditional %40 %41 %42
         %41 = OpLabel
               OpKill
         %42 = OpLabel
         %44 = OpLoad %11 %24
         %46 = OpSLessThan %19 %44 %45
               OpSelectionMerge %48 None
               OpBranchConditional %46 %47 %48
         %47 = OpLabel
               OpKill
         %48 = OpLabel
               OpBranch %22
         %22 = OpLabel
               OpStore %51 %53
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# injectionSwitch
BUFFER variant_injectionSwitch DATA_TYPE vec2<float> 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_injectionSwitch 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