xref: /third_party/vk-gl-cts/external/vulkancts/data/vulkan/amber/graphicsfuzz/cov-const-folding-clamp.amber

#!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 coverage-gap found by GraphicsFuzz.

# Short description: A fragment shader that covers a specific const folding rule 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;
#
# layout(location = 0) out vec4 _GLF_color;
# layout(set = 0, binding = 0) uniform buf0
# {
#     float fourtytwo;
# };
#
# void main()
# {
#     // If condition is always false.
#     if(clamp(1.0, fourtytwo, fourtytwo) > 42.0
#        || clamp(1.0, fourtytwo, fourtytwo) < 42.0)
#         _GLF_color = vec4(0);
#     else
#         _GLF_color = vec4(1, 0, 0, 1);
#
# }
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" %36
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %9 "buf0"
               OpMemberName %9 0 "fourtytwo"
               OpName %11 ""
               OpName %36 "_GLF_color"
               OpMemberDecorate %9 0 Offset 0
               OpDecorate %9 Block
               OpDecorate %11 DescriptorSet 0
               OpDecorate %11 Binding 0
               OpDecorate %36 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeBool
          %7 = OpTypeFloat 32
          %8 = OpConstant %7 1
          %9 = OpTypeStruct %7
         %10 = OpTypePointer Uniform %9
         %11 = OpVariable %10 Uniform
         %12 = OpTypeInt 32 1
         %13 = OpConstant %12 0
         %14 = OpTypePointer Uniform %7
         %20 = OpConstant %7 42
         %34 = OpTypeVector %7 4
         %35 = OpTypePointer Output %34
         %36 = OpVariable %35 Output
         %37 = OpConstant %7 0
         %38 = OpConstantComposite %34 %37 %37 %37 %37
         %40 = OpConstantComposite %34 %8 %37 %37 %8
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %15 = OpAccessChain %14 %11 %13
         %16 = OpLoad %7 %15
         %17 = OpAccessChain %14 %11 %13
         %18 = OpLoad %7 %17
         %19 = OpExtInst %7 %1 FClamp %8 %16 %18
         %21 = OpFOrdGreaterThan %6 %19 %20
         %22 = OpLogicalNot %6 %21
               OpSelectionMerge %24 None
               OpBranchConditional %22 %23 %24
         %23 = OpLabel
         %25 = OpAccessChain %14 %11 %13
         %26 = OpLoad %7 %25
         %27 = OpAccessChain %14 %11 %13
         %28 = OpLoad %7 %27
         %29 = OpExtInst %7 %1 FClamp %8 %26 %28
         %30 = OpFOrdLessThan %6 %29 %20
               OpBranch %24
         %24 = OpLabel
         %31 = OpPhi %6 %21 %5 %30 %23
               OpSelectionMerge %33 None
               OpBranchConditional %31 %32 %39
         %32 = OpLabel
               OpStore %36 %38
               OpBranch %33
         %39 = OpLabel
               OpStore %36 %40
               OpBranch %33
         %33 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# fourtytwo
BUFFER variant_fourtytwo DATA_TYPE float DATA
 42.0
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_fourtytwo 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