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| author | Bill Wendling <isanbard@gmail.com> | 2010-06-29 21:24:00 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2010-06-29 21:24:00 +0000 |
| commit | 1767723dbe26e7149232d5a3a34f3be543ba5bb6 (patch) | |
| tree | 014723774a0353e41ea37a01f915a556bc29e394 /llvm/lib/AsmParser/LLParser.cpp | |
| parent | 30689a3a7fa0cf71b4c52c702360f9f51bbab1fa (diff) | |
| download | bcm5719-llvm-1767723dbe26e7149232d5a3a34f3be543ba5bb6.tar.gz bcm5719-llvm-1767723dbe26e7149232d5a3a34f3be543ba5bb6.zip | |
Introducing the "linker_weak" linkage type. This will be used for Objective-C
metadata types which should be marked as "weak", but which the linker will
remove upon final linkage. For example, the "objc_msgSend_fixup_alloc" symbol is
defined like this:
.globl l_objc_msgSend_fixup_alloc
.weak_definition l_objc_msgSend_fixup_alloc
.section __DATA, __objc_msgrefs, coalesced
.align 3
l_objc_msgSend_fixup_alloc:
.quad _objc_msgSend_fixup
.quad L_OBJC_METH_VAR_NAME_1
This is different from the "linker_private" linkage type, because it can't have
the metadata defined with ".weak_definition".
llvm-svn: 107205
Diffstat (limited to 'llvm/lib/AsmParser/LLParser.cpp')
| -rw-r--r-- | llvm/lib/AsmParser/LLParser.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp index 1cd66e536ea..9a9bd122692 100644 --- a/llvm/lib/AsmParser/LLParser.cpp +++ b/llvm/lib/AsmParser/LLParser.cpp @@ -198,6 +198,7 @@ bool LLParser::ParseTopLevelEntities() { // OptionalAddrSpace ('constant'|'global') ... case lltok::kw_private : // OptionalLinkage case lltok::kw_linker_private: // OptionalLinkage + case lltok::kw_linker_weak: // OptionalLinkage case lltok::kw_internal: // OptionalLinkage case lltok::kw_weak: // OptionalLinkage case lltok::kw_weak_odr: // OptionalLinkage @@ -629,7 +630,8 @@ bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, Linkage != GlobalValue::WeakODRLinkage && Linkage != GlobalValue::InternalLinkage && Linkage != GlobalValue::PrivateLinkage && - Linkage != GlobalValue::LinkerPrivateLinkage) + Linkage != GlobalValue::LinkerPrivateLinkage && + Linkage != GlobalValue::LinkerWeakLinkage) return Error(LinkageLoc, "invalid linkage type for alias"); Constant *Aliasee; @@ -1013,6 +1015,7 @@ bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { /// ::= /*empty*/ /// ::= 'private' /// ::= 'linker_private' +/// ::= 'linker_weak' /// ::= 'internal' /// ::= 'weak' /// ::= 'weak_odr' @@ -1030,6 +1033,7 @@ bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { default: Res=GlobalValue::ExternalLinkage; return false; case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; + case lltok::kw_linker_weak: Res = GlobalValue::LinkerWeakLinkage; break; case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; @@ -2704,6 +2708,7 @@ bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { break; case GlobalValue::PrivateLinkage: case GlobalValue::LinkerPrivateLinkage: + case GlobalValue::LinkerWeakLinkage: case GlobalValue::InternalLinkage: case GlobalValue::AvailableExternallyLinkage: case GlobalValue::LinkOnceAnyLinkage: |
