1 //===-- ValueLatticeUtils.cpp - Utils for solving lattices ------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file implements common functions useful for performing data-flow
10 // analyses that propagate values across function boundaries.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Analysis/ValueLatticeUtils.h"
15 #include "llvm/IR/GlobalVariable.h"
16 #include "llvm/IR/Instructions.h"
19 bool llvm::canTrackArgumentsInterprocedurally(Function *F) {
20 return F->hasLocalLinkage() && !F->hasAddressTaken();
23 bool llvm::canTrackReturnsInterprocedurally(Function *F) {
24 return F->hasExactDefinition() && !F->hasFnAttribute(Attribute::Naked);
27 bool llvm::canTrackGlobalVariableInterprocedurally(GlobalVariable *GV) {
28 if (GV->isConstant() || !GV->hasLocalLinkage() ||
29 !GV->hasDefinitiveInitializer())
31 return !any_of(GV->users(), [&](User *U) {
32 if (auto *Store = dyn_cast<StoreInst>(U)) {
33 if (Store->getValueOperand() == GV || Store->isVolatile())
35 } else if (auto *Load = dyn_cast<LoadInst>(U)) {
36 if (Load->isVolatile())