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

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index ffccd9e2c0a..fa9b777cd8e 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -199,6 +199,7 @@ void AsmPrinter::EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const {
   case GlobalValue::LinkOnceODRLinkage:
   case GlobalValue::WeakAnyLinkage:
   case GlobalValue::WeakODRLinkage:
+  case GlobalValue::LinkerWeakLinkage:
   case GlobalValue::LinkerPrivateLinkage:
     if (MAI->getWeakDefDirective() != 0) {
       // .globl _foo
@@ -1610,8 +1611,8 @@ MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const {
 }
 
 /// GetJTISymbol - Return the symbol for the specified jump table entry.
-MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const {
-  return MF->getJTISymbol(JTID, OutContext, isLinkerPrivate);
+MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool PassToLinker) const {
+  return MF->getJTISymbol(JTID, OutContext, PassToLinker);
 }
 
 /// GetJTSetSymbol - Return the symbol for the specified jump table .set