| //===--- Assumptions.h - Assumption handling and organization ---*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // String assumptions that are known to optimization passes should be placed in |
| // the KnownAssumptionStrings set. This can be done in various ways, i.a., |
| // via a static KnownAssumptionString object. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_IR_ASSUMPTIONS_H |
| #define LLVM_IR_ASSUMPTIONS_H |
| |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/ADT/StringSet.h" |
| |
| namespace llvm { |
| |
| class Function; |
| |
| /// The key we use for assumption attributes. |
| constexpr StringRef AssumptionAttrKey = "llvm.assume"; |
| |
| /// A set of known assumption strings that are accepted without warning and |
| /// which can be recommended as typo correction. |
| extern StringSet<> KnownAssumptionStrings; |
| |
| /// Helper that allows to insert a new assumption string in the known assumption |
| /// set by creating a (static) object. |
| struct KnownAssumptionString { |
| KnownAssumptionString(StringRef AssumptionStr) |
| : AssumptionStr(AssumptionStr) { |
| KnownAssumptionStrings.insert(AssumptionStr); |
| } |
| operator StringRef() const { return AssumptionStr; } |
| |
| private: |
| StringRef AssumptionStr; |
| }; |
| |
| /// Return true if \p F has the assumption \p AssumptionStr attached. |
| bool hasAssumption(Function &F, const KnownAssumptionString &AssumptionStr); |
| |
| } // namespace llvm |
| |
| #endif |