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//===--- 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/DenseSet.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSet.h"
namespace llvm {
class Function;
class CallBase;
/// 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(const char *AssumptionStr)
: AssumptionStr(AssumptionStr) {
KnownAssumptionStrings.insert(AssumptionStr);
}
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(const Function &F,
const KnownAssumptionString &AssumptionStr);
/// Return true if \p CB or the callee has the assumption \p AssumptionStr
/// attached.
bool hasAssumption(const CallBase &CB,
const KnownAssumptionString &AssumptionStr);
/// Return the set of all assumptions for the function \p F.
DenseSet<StringRef> getAssumptions(const Function &F);
/// Return the set of all assumptions for the call \p CB.
DenseSet<StringRef> getAssumptions(const CallBase &CB);
/// Appends the set of assumptions \p Assumptions to \F.
bool addAssumptions(Function &F, const DenseSet<StringRef> &Assumptions);
/// Appends the set of assumptions \p Assumptions to \CB.
bool addAssumptions(CallBase &CB, const DenseSet<StringRef> &Assumptions);
} // namespace llvm
#endif
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