external/vulkancts/data/vulkan/amber/graphicsfuzz/cov-fold-and-in-for-loop-range.amber

#!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 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
# {
#     int one;
# };
#
# int func()
# {
#     int ret = 0;
#
#     for(int i = 3; i > (i & 1); i -= one)
#         ret++;
#
#     return ret;
# }
#
# void main()
# {
#     if (func() == 2)
#         _GLF_color = vec4(1, 0, 0, 1);
#     else
#         _GLF_color = vec4(0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 53
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %47
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "func("
               OpName %11 "ret"
               OpName %13 "i"
               OpName %28 "buf0"
               OpMemberName %28 0 "one"
               OpName %30 ""
               OpName %47 "_GLF_color"
               OpMemberDecorate %28 0 Offset 0
               OpDecorate %28 Block
               OpDecorate %30 DescriptorSet 0
               OpDecorate %30 Binding 0
               OpDecorate %47 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypeFunction %6
         %10 = OpTypePointer Function %6
         %12 = OpConstant %6 0
         %14 = OpConstant %6 3
         %22 = OpConstant %6 1
         %24 = OpTypeBool
         %28 = OpTypeStruct %6
         %29 = OpTypePointer Uniform %28
         %30 = OpVariable %29 Uniform
         %31 = OpTypePointer Uniform %6
         %40 = OpConstant %6 2
         %44 = OpTypeFloat 32
         %45 = OpTypeVector %44 4
         %46 = OpTypePointer Output %45
         %47 = OpVariable %46 Output
         %48 = OpConstant %44 1
         %49 = OpConstant %44 0
         %50 = OpConstantComposite %45 %48 %49 %49 %48
         %52 = OpConstantComposite %45 %49 %49 %49 %49
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %39 = OpFunctionCall %6 %8
         %41 = OpIEqual %24 %39 %40
               OpSelectionMerge %43 None
               OpBranchConditional %41 %42 %51
         %42 = OpLabel
               OpStore %47 %50
               OpBranch %43
         %51 = OpLabel
               OpStore %47 %52
               OpBranch %43
         %43 = OpLabel
               OpReturn
               OpFunctionEnd
          %8 = OpFunction %6 None %7
          %9 = OpLabel
         %11 = OpVariable %10 Function
         %13 = OpVariable %10 Function
               OpStore %11 %12
               OpStore %13 %14
               OpBranch %15
         %15 = OpLabel
               OpLoopMerge %17 %18 None
               OpBranch %19
         %19 = OpLabel
         %20 = OpLoad %6 %13
         %21 = OpLoad %6 %13
         %23 = OpBitwiseAnd %6 %21 %22
         %25 = OpSGreaterThan %24 %20 %23
               OpBranchConditional %25 %16 %17
         %16 = OpLabel
         %26 = OpLoad %6 %11
         %27 = OpIAdd %6 %26 %22
               OpStore %11 %27
               OpBranch %18
         %18 = OpLabel
         %32 = OpAccessChain %31 %30 %12
         %33 = OpLoad %6 %32
         %34 = OpLoad %6 %13
         %35 = OpISub %6 %34 %33
               OpStore %13 %35
               OpBranch %15
         %17 = OpLabel
         %36 = OpLoad %6 %11
               OpReturnValue %36
               OpFunctionEnd
END

# uniforms for variant

# one
BUFFER variant_one DATA_TYPE int32 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