@<Name> = alias [Linkage] [Visibility] <AliaseeTy> @<Aliasee>
+The linkgage must be one of ``private``, ``linker_private``,
+``linker_private_weak``, ``internal``, ``linkonce``, ``weak``,
+``linkonce_odr``, ``weak_odr``, ``linkonce_odr_auto_hide``, ``external``. Note
+that some system linkers might not correctly handle dropping a weak symbol that
+is aliased by a non weak alias.
+
.. _namedmetadatastructure:
Named Metadata
unsigned Visibility) {
assert(Lex.getKind() == lltok::kw_alias);
Lex.Lex();
- unsigned Linkage;
LocTy LinkageLoc = Lex.getLoc();
- if (ParseOptionalLinkage(Linkage))
+ unsigned L;
+ if (ParseOptionalLinkage(L))
return true;
- if (Linkage != GlobalValue::ExternalLinkage &&
- Linkage != GlobalValue::WeakAnyLinkage &&
- Linkage != GlobalValue::WeakODRLinkage &&
- Linkage != GlobalValue::InternalLinkage &&
- Linkage != GlobalValue::PrivateLinkage &&
- Linkage != GlobalValue::LinkerPrivateLinkage &&
- Linkage != GlobalValue::LinkerPrivateWeakLinkage)
+ GlobalValue::LinkageTypes Linkage = (GlobalValue::LinkageTypes) L;
+
+ if(!GlobalValue::isExternalLinkage(Linkage) &&
+ !GlobalValue::isLocalLinkage(Linkage) &&
+ !GlobalValue::isWeakLinkage(Linkage) &&
+ !GlobalValue::isLinkOnceLinkage(Linkage))
return Error(LinkageLoc, "invalid linkage type for alias");
Constant *Aliasee;
if (I->hasExternalLinkage() || !MAI->getWeakRefDirective())
OutStreamer.EmitSymbolAttribute(Name, MCSA_Global);
- else if (I->hasWeakLinkage())
+ else if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference);
else
assert(I->hasLocalLinkage() && "Invalid alias linkage");
Assert1(!GA.getName().empty(),
"Alias name cannot be empty!", &GA);
Assert1(GA.hasExternalLinkage() || GA.hasLocalLinkage() ||
- GA.hasWeakLinkage(),
+ GA.hasWeakLinkage() || GA.hasLinkOnceLinkage(),
"Alias should have external or external weak linkage!", &GA);
Assert1(GA.getAliasee(),
"Aliasee cannot be NULL!", &GA);
; CHECK-DAG: .weak bar_f
@bar_f = alias weak %FunTy* @foo_f
+@bar_l = alias linkonce_odr i32* @bar
+; CHECK-DAG: .weak bar_l
+
@bar_i = alias internal i32* @bar
; CHECK-DAG: .globl A