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".
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107205 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/CppBackend/CPPBackend.cpp b/lib/Target/CppBackend/CPPBackend.cpp
index eda08e7..e72763b 100644
--- a/lib/Target/CppBackend/CPPBackend.cpp
+++ b/lib/Target/CppBackend/CPPBackend.cpp
@@ -286,6 +286,8 @@
Out << "GlobalValue::PrivateLinkage"; break;
case GlobalValue::LinkerPrivateLinkage:
Out << "GlobalValue::LinkerPrivateLinkage"; break;
+ case GlobalValue::LinkerWeakLinkage:
+ Out << "GlobalValue::LinkerWeakLinkage"; break;
case GlobalValue::AvailableExternallyLinkage:
Out << "GlobalValue::AvailableExternallyLinkage "; break;
case GlobalValue::LinkOnceAnyLinkage:
diff --git a/lib/Target/Mangler.cpp b/lib/Target/Mangler.cpp
index 4ef017a..fc2f78d 100644
--- a/lib/Target/Mangler.cpp
+++ b/lib/Target/Mangler.cpp
@@ -118,6 +118,9 @@
} else if (PrefixTy == Mangler::LinkerPrivate) {
const char *Prefix = MAI.getLinkerPrivateGlobalPrefix();
OutName.append(Prefix, Prefix+strlen(Prefix));
+ } else if (PrefixTy == Mangler::LinkerWeak) {
+ const char *Prefix = MAI.getLinkerWeakGlobalPrefix();
+ OutName.append(Prefix, Prefix+strlen(Prefix));
}
const char *Prefix = MAI.getGlobalPrefix();
@@ -182,6 +185,8 @@
PrefixTy = Mangler::Private;
else if (GV->hasLinkerPrivateLinkage())
PrefixTy = Mangler::LinkerPrivate;
+ else if (GV->hasLinkerWeakLinkage())
+ PrefixTy = Mangler::LinkerWeak;
// If this global has a name, handle it simply.
if (GV->hasName()) {
diff --git a/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp b/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp
index c100c59..33a11d0 100644
--- a/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp
+++ b/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp
@@ -129,6 +129,7 @@
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
case GlobalValue::ExternalLinkage:
+ case GlobalValue::LinkerWeakLinkage:
emitArrayBound(GVSym, GV);
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);