0b57cec536
This uses the new layout of the upstream repository, which was recently migrated to GitHub, and converted into a "monorepo". That is, most of the earlier separate sub-projects with their own branches and tags were consolidated into one top-level directory, and are now branched and tagged together. Updating the vendor area to match this layout is next.
44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
//===-- ValueLatticeUtils.cpp - Utils for solving lattices ------*- 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements common functions useful for performing data-flow
|
|
// analyses that propagate values across function boundaries.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/ValueLatticeUtils.h"
|
|
#include "llvm/IR/GlobalVariable.h"
|
|
#include "llvm/IR/Instructions.h"
|
|
using namespace llvm;
|
|
|
|
bool llvm::canTrackArgumentsInterprocedurally(Function *F) {
|
|
return F->hasLocalLinkage() && !F->hasAddressTaken();
|
|
}
|
|
|
|
bool llvm::canTrackReturnsInterprocedurally(Function *F) {
|
|
return F->hasExactDefinition() && !F->hasFnAttribute(Attribute::Naked);
|
|
}
|
|
|
|
bool llvm::canTrackGlobalVariableInterprocedurally(GlobalVariable *GV) {
|
|
if (GV->isConstant() || !GV->hasLocalLinkage() ||
|
|
!GV->hasDefinitiveInitializer())
|
|
return false;
|
|
return !any_of(GV->users(), [&](User *U) {
|
|
if (auto *Store = dyn_cast<StoreInst>(U)) {
|
|
if (Store->getValueOperand() == GV || Store->isVolatile())
|
|
return true;
|
|
} else if (auto *Load = dyn_cast<LoadInst>(U)) {
|
|
if (Load->isVolatile())
|
|
return true;
|
|
} else {
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
}
|