#!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 GraphicsFuzz.

# Short description: A fragment shader that covers a specific instruction folding path.

# The test passes because shader always writes 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(location = 0) out vec4 _GLF_color;
# layout(set = 0, binding = 0) uniform buf0
# {
#     vec2 twoandthree; // (2.0, 3.0)
# };
#
# void main()
# {
#     vec2 a = twoandthree;
#     vec2 b = vec2(a.x, clamp(a, vec2(1), vec2(1)).y);
#
#     // Always true
#     if (b.x == 2.0 && b.y == 1.0)
#         _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; 8
; Bound: 51
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %46
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %9 "a"
               OpName %10 "buf0"
               OpMemberName %10 0 "twoandthree"
               OpName %12 ""
               OpName %18 "b"
               OpName %46 "_GLF_color"
               OpMemberDecorate %10 0 Offset 0
               OpDecorate %10 Block
               OpDecorate %12 DescriptorSet 0
               OpDecorate %12 Binding 0
               OpDecorate %46 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 2
          %8 = OpTypePointer Function %7
         %10 = OpTypeStruct %7
         %11 = OpTypePointer Uniform %10
         %12 = OpVariable %11 Uniform
         %13 = OpTypeInt 32 1
         %14 = OpConstant %13 0
         %15 = OpTypePointer Uniform %7
         %19 = OpTypeInt 32 0
         %20 = OpConstant %19 0
         %21 = OpTypePointer Function %6
         %25 = OpConstant %6 1
         %26 = OpConstantComposite %7 %25 %25
         %28 = OpConstant %19 1
         %31 = OpTypeBool
         %34 = OpConstant %6 2
         %44 = OpTypeVector %6 4
         %45 = OpTypePointer Output %44
         %46 = OpVariable %45 Output
         %47 = OpConstant %6 0
         %48 = OpConstantComposite %44 %25 %47 %47 %25
         %50 = OpConstantComposite %44 %47 %47 %47 %47
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %9 = OpVariable %8 Function
         %18 = OpVariable %8 Function
         %16 = OpAccessChain %15 %12 %14
         %17 = OpLoad %7 %16
               OpStore %9 %17
         %22 = OpAccessChain %21 %9 %20
         %23 = OpLoad %6 %22
         %24 = OpLoad %7 %9
         %27 = OpExtInst %7 %1 FClamp %24 %26 %26
         %29 = OpCompositeExtract %6 %27 1
         %30 = OpCompositeConstruct %7 %23 %29
               OpStore %18 %30
         %32 = OpAccessChain %21 %18 %20
         %33 = OpLoad %6 %32
         %35 = OpFOrdEqual %31 %33 %34
               OpSelectionMerge %37 None
               OpBranchConditional %35 %36 %37
         %36 = OpLabel
         %38 = OpAccessChain %21 %18 %28
         %39 = OpLoad %6 %38
         %40 = OpFOrdEqual %31 %39 %25
               OpBranch %37
         %37 = OpLabel
         %41 = OpPhi %31 %35 %5 %40 %36
               OpSelectionMerge %43 None
               OpBranchConditional %41 %42 %49
         %42 = OpLabel
               OpStore %46 %48
               OpBranch %43
         %49 = OpLabel
               OpStore %46 %50
               OpBranch %43
         %43 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# twoandthree
BUFFER variant_twoandthree DATA_TYPE vec2<float> DATA
 2.0 3.0
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_twoandthree 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