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//=- CFLAliasAnalysisUtils.h - Utilities for CFL Alias Analysis ----*- 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
//
//===----------------------------------------------------------------------===//
// \file
// These are the utilities/helpers used by the CFL Alias Analyses available in
// tree, i.e. Steensgaard's and Andersens'.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_CFLALIASANALYSISUTILS_H
#define LLVM_ANALYSIS_CFLALIASANALYSISUTILS_H
#include "llvm/IR/Argument.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/ValueHandle.h"
namespace llvm {
namespace cflaa {
template <typename AAResult> struct FunctionHandle final : public CallbackVH {
FunctionHandle(Function *Fn, AAResult *Result)
: CallbackVH(Fn), Result(Result) {
assert(Fn != nullptr);
assert(Result != nullptr);
}
void deleted() override { removeSelfFromCache(); }
void allUsesReplacedWith(Value *) override { removeSelfFromCache(); }
private:
AAResult *Result;
void removeSelfFromCache() {
assert(Result != nullptr);
auto *Val = getValPtr();
Result->evict(cast<Function>(Val));
setValPtr(nullptr);
}
};
static inline const Function *parentFunctionOfValue(const Value *Val) {
if (auto *Inst = dyn_cast<Instruction>(Val)) {
auto *Bb = Inst->getParent();
return Bb->getParent();
}
if (auto *Arg = dyn_cast<Argument>(Val))
return Arg->getParent();
return nullptr;
}
} // namespace cflaa
} // namespace llvm
#endif // LLVM_ANALYSIS_CFLALIASANALYSISUTILS_H
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