36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
//===- Uniformity.h --------------------------------------*- C++ -*--------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ADT_UNIFORMITY_H
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#define LLVM_ADT_UNIFORMITY_H
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namespace llvm {
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/// Enum describing how values behave with respect to uniformity and
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/// divergence, to answer the question: if the same instruction is executed by
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/// two threads in a convergent set of threads, will its result value be
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/// uniform, i.e. the same on both threads?
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enum class ValueUniformity {
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/// The result value is uniform if and only if all operands are uniform.
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Default,
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/// The result value is always uniform.
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AlwaysUniform,
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/// The result value can never be assumed to be uniform.
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NeverUniform,
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/// The result value requires a custom uniformity check. A target-specific
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/// callback determines whether the result is uniform based on which
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/// operands are uniform.
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Custom
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};
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} // namespace llvm
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#endif // LLVM_ADT_UNIFORMITY_H
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