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Introduce non-const overloads for GlobalAlias::{get,resolve}AliasedGlobal.

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llvm-svn: 188725
This commit is contained in:
Peter Collingbourne 2013-08-19 23:13:33 +00:00
parent b4a62fef02
commit 5c5e108012
2 changed files with 16 additions and 10 deletions
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10
include/llvm/IR/GlobalAlias.h
View File

@ -66,14 +66,20 @@ public:
}
/// getAliasedGlobal() - Aliasee can be either global or bitcast of
/// global. This method retrives the global for both aliasee flavours.
const GlobalValue *getAliasedGlobal() const;
GlobalValue *getAliasedGlobal();
const GlobalValue *getAliasedGlobal() const {
return const_cast<GlobalAlias *>(this)->getAliasedGlobal();
}
/// resolveAliasedGlobal() - This method tries to ultimately resolve the alias
/// by going through the aliasing chain and trying to find the very last
/// global. Returns NULL if a cycle was found. If stopOnWeak is false, then
/// the whole chain aliasing chain is traversed, otherwise - only strong
/// aliases.
const GlobalValue *resolveAliasedGlobal(bool stopOnWeak = true) const;
GlobalValue *resolveAliasedGlobal(bool stopOnWeak = true);
const GlobalValue *resolveAliasedGlobal(bool stopOnWeak = true) const {
return const_cast<GlobalAlias *>(this)->resolveAliasedGlobal(stopOnWeak);
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const Value *V) {

16
lib/IR/Globals.cpp
View File

@ -229,14 +229,14 @@ void GlobalAlias::setAliasee(Constant *Aliasee) {
setOperand(0, Aliasee);
}
const GlobalValue *GlobalAlias::getAliasedGlobal() const {
const Constant *C = getAliasee();
GlobalValue *GlobalAlias::getAliasedGlobal() {
Constant *C = getAliasee();
if (C == 0) return 0;
if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
return GV;
const ConstantExpr *CE = cast<ConstantExpr>(C);
ConstantExpr *CE = cast<ConstantExpr>(C);
assert((CE->getOpcode() == Instruction::BitCast ||
CE->getOpcode() == Instruction::GetElementPtr) &&
"Unsupported aliasee");
@ -244,18 +244,18 @@ const GlobalValue *GlobalAlias::getAliasedGlobal() const {
return cast<GlobalValue>(CE->getOperand(0));
}
const GlobalValue *GlobalAlias::resolveAliasedGlobal(bool stopOnWeak) const {
SmallPtrSet<const GlobalValue*, 3> Visited;
GlobalValue *GlobalAlias::resolveAliasedGlobal(bool stopOnWeak) {
SmallPtrSet<GlobalValue*, 3> Visited;
// Check if we need to stop early.
if (stopOnWeak && mayBeOverridden())
return this;
const GlobalValue *GV = getAliasedGlobal();
GlobalValue *GV = getAliasedGlobal();
Visited.insert(GV);
// Iterate over aliasing chain, stopping on weak alias if necessary.
while (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV)) {
while (GlobalAlias *GA = dyn_cast<GlobalAlias>(GV)) {
if (stopOnWeak && GA->mayBeOverridden())
break;