xref: /third_party/vk-gl-cts/external/vulkancts/data/vulkan/amber/graphicsfuzz/cov-bitfieldExtract-undefined.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 the GraphicsFuzz project.

# Short description: A fragment shader that covers a specific constant fold code path

# 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 310 es
# #define _int_1 _GLF_uniform_int_values[0]
# #define _int_0 _GLF_uniform_int_values[1]
#
# precision highp float;
# precision highp int;
#
# // Contents of _GLF_uniform_int_values: [1, 0]
# layout(set = 0, binding = 0) uniform buf0
# {
#     int _GLF_uniform_int_values[2];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     uint a = 0x77777777u;
#
#     // b becomes undefined. This results in an undefined value, but not in undefined behavior.
#     uint b = bitfieldExtract(a, -1, 1);
#
#     uint c = a | b;
#
#     // Always true.
#     if ((c & a) == a)
#     {
#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
#     }
#     else
#     {
#         _GLF_color = vec4(_int_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: 57
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %31
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "a"
               OpName %10 "b"
               OpName %16 "c"
               OpName %31 "_GLF_color"
               OpName %34 "buf0"
               OpMemberName %34 0 "_GLF_uniform_int_values"
               OpName %36 ""
               OpDecorate %31 Location 0
               OpDecorate %33 ArrayStride 16
               OpMemberDecorate %34 0 Offset 0
               OpDecorate %34 Block
               OpDecorate %36 DescriptorSet 0
               OpDecorate %36 Binding 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 0
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 2004318071
         %12 = OpTypeInt 32 1
         %13 = OpConstant %12 -1
         %14 = OpConstant %12 1
         %24 = OpTypeBool
         %28 = OpTypeFloat 32
         %29 = OpTypeVector %28 4
         %30 = OpTypePointer Output %29
         %31 = OpVariable %30 Output
         %32 = OpConstant %6 2
         %33 = OpTypeArray %12 %32
         %34 = OpTypeStruct %33
         %35 = OpTypePointer Uniform %34
         %36 = OpVariable %35 Uniform
         %37 = OpConstant %12 0
         %38 = OpTypePointer Uniform %12
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %10 = OpVariable %7 Function
         %16 = OpVariable %7 Function
               OpStore %8 %9
         %11 = OpLoad %6 %8
         %15 = OpBitFieldUExtract %6 %11 %13 %14
               OpStore %10 %15
         %17 = OpLoad %6 %8
         %18 = OpLoad %6 %10
         %19 = OpBitwiseOr %6 %17 %18
               OpStore %16 %19
         %20 = OpLoad %6 %16
         %21 = OpLoad %6 %8
         %22 = OpBitwiseAnd %6 %20 %21
         %23 = OpLoad %6 %8
         %25 = OpIEqual %24 %22 %23
               OpSelectionMerge %27 None
               OpBranchConditional %25 %26 %52
         %26 = OpLabel
         %39 = OpAccessChain %38 %36 %37 %37
         %40 = OpLoad %12 %39
         %41 = OpConvertSToF %28 %40
         %42 = OpAccessChain %38 %36 %37 %14
         %43 = OpLoad %12 %42
         %44 = OpConvertSToF %28 %43
         %45 = OpAccessChain %38 %36 %37 %14
         %46 = OpLoad %12 %45
         %47 = OpConvertSToF %28 %46
         %48 = OpAccessChain %38 %36 %37 %37
         %49 = OpLoad %12 %48
         %50 = OpConvertSToF %28 %49
         %51 = OpCompositeConstruct %29 %41 %44 %47 %50
               OpStore %31 %51
               OpBranch %27
         %52 = OpLabel
         %53 = OpAccessChain %38 %36 %37 %14
         %54 = OpLoad %12 %53
         %55 = OpConvertSToF %28 %54
         %56 = OpCompositeConstruct %29 %55 %55 %55 %55
               OpStore %31 %56
               OpBranch %27
         %27 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
 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__GLF_uniform_int_values 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