Implement the "linker_private_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. However, this linkage isn't specific to
Objective-C.
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".
Currently only supported on Darwin platforms.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107433 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/LLLexer.cpp b/lib/AsmParser/LLLexer.cpp
index 9b4370f..f4c0e50 100644
--- a/lib/AsmParser/LLLexer.cpp
+++ b/lib/AsmParser/LLLexer.cpp
@@ -492,6 +492,7 @@
KEYWORD(private);
KEYWORD(linker_private);
+ KEYWORD(linker_private_weak);
KEYWORD(internal);
KEYWORD(available_externally);
KEYWORD(linkonce);
diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 1cd66e5..6752181 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -196,19 +196,20 @@
// optional leading prefixes, the production is:
// GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal
// OptionalAddrSpace ('constant'|'global') ...
- case lltok::kw_private : // OptionalLinkage
- case lltok::kw_linker_private: // OptionalLinkage
- case lltok::kw_internal: // OptionalLinkage
- case lltok::kw_weak: // OptionalLinkage
- case lltok::kw_weak_odr: // OptionalLinkage
- case lltok::kw_linkonce: // OptionalLinkage
- case lltok::kw_linkonce_odr: // OptionalLinkage
- case lltok::kw_appending: // OptionalLinkage
- case lltok::kw_dllexport: // OptionalLinkage
- case lltok::kw_common: // OptionalLinkage
- case lltok::kw_dllimport: // OptionalLinkage
- case lltok::kw_extern_weak: // OptionalLinkage
- case lltok::kw_external: { // OptionalLinkage
+ case lltok::kw_private: // OptionalLinkage
+ case lltok::kw_linker_private: // OptionalLinkage
+ case lltok::kw_linker_private_weak: // OptionalLinkage
+ case lltok::kw_internal: // OptionalLinkage
+ case lltok::kw_weak: // OptionalLinkage
+ case lltok::kw_weak_odr: // OptionalLinkage
+ case lltok::kw_linkonce: // OptionalLinkage
+ case lltok::kw_linkonce_odr: // OptionalLinkage
+ case lltok::kw_appending: // OptionalLinkage
+ case lltok::kw_dllexport: // OptionalLinkage
+ case lltok::kw_common: // OptionalLinkage
+ case lltok::kw_dllimport: // OptionalLinkage
+ case lltok::kw_extern_weak: // OptionalLinkage
+ case lltok::kw_external: { // OptionalLinkage
unsigned Linkage, Visibility;
if (ParseOptionalLinkage(Linkage) ||
ParseOptionalVisibility(Visibility) ||
@@ -629,7 +630,8 @@
Linkage != GlobalValue::WeakODRLinkage &&
Linkage != GlobalValue::InternalLinkage &&
Linkage != GlobalValue::PrivateLinkage &&
- Linkage != GlobalValue::LinkerPrivateLinkage)
+ Linkage != GlobalValue::LinkerPrivateLinkage &&
+ Linkage != GlobalValue::LinkerPrivateWeakLinkage)
return Error(LinkageLoc, "invalid linkage type for alias");
Constant *Aliasee;
@@ -1013,11 +1015,13 @@
/// ::= /*empty*/
/// ::= 'private'
/// ::= 'linker_private'
+/// ::= 'linker_private_weak'
/// ::= 'internal'
/// ::= 'weak'
/// ::= 'weak_odr'
/// ::= 'linkonce'
/// ::= 'linkonce_odr'
+/// ::= 'available_externally'
/// ::= 'appending'
/// ::= 'dllexport'
/// ::= 'common'
@@ -1030,6 +1034,9 @@
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_private_weak:
+ Res = GlobalValue::LinkerPrivateWeakLinkage;
+ 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 +2711,7 @@
break;
case GlobalValue::PrivateLinkage:
case GlobalValue::LinkerPrivateLinkage:
+ case GlobalValue::LinkerPrivateWeakLinkage:
case GlobalValue::InternalLinkage:
case GlobalValue::AvailableExternallyLinkage:
case GlobalValue::LinkOnceAnyLinkage:
diff --git a/lib/AsmParser/LLToken.h b/lib/AsmParser/LLToken.h
index 5eed170..2703134 100644
--- a/lib/AsmParser/LLToken.h
+++ b/lib/AsmParser/LLToken.h
@@ -37,9 +37,9 @@
kw_declare, kw_define,
kw_global, kw_constant,
- kw_private, kw_linker_private, kw_internal, kw_linkonce, kw_linkonce_odr,
- kw_weak, kw_weak_odr, kw_appending, kw_dllimport, kw_dllexport, kw_common,
- kw_available_externally,
+ kw_private, kw_linker_private, kw_linker_private_weak, kw_internal,
+ kw_linkonce, kw_linkonce_odr, kw_weak, kw_weak_odr, kw_appending,
+ kw_dllimport, kw_dllexport, kw_common, kw_available_externally,
kw_default, kw_hidden, kw_protected,
kw_extern_weak,
kw_external, kw_thread_local,
diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp
index a252da2..121dc86 100644
--- a/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -75,6 +75,7 @@
case 11: return GlobalValue::LinkOnceODRLinkage;
case 12: return GlobalValue::AvailableExternallyLinkage;
case 13: return GlobalValue::LinkerPrivateLinkage;
+ case 14: return GlobalValue::LinkerPrivateWeakLinkage;
}
}
diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index cdeb854..fa1b2c4 100644
--- a/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -313,6 +313,7 @@
case GlobalValue::LinkOnceODRLinkage: return 11;
case GlobalValue::AvailableExternallyLinkage: return 12;
case GlobalValue::LinkerPrivateLinkage: return 13;
+ case GlobalValue::LinkerPrivateWeakLinkage: return 14;
}
}
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 9d060f8..fa3356d 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -200,6 +200,7 @@
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
case GlobalValue::LinkerPrivateLinkage:
+ case GlobalValue::LinkerPrivateWeakLinkage:
if (MAI->getWeakDefDirective() != 0) {
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
diff --git a/lib/Target/CppBackend/CPPBackend.cpp b/lib/Target/CppBackend/CPPBackend.cpp
index eda08e7..9056cef 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::LinkerPrivateWeakLinkage:
+ Out << "GlobalValue::LinkerPrivateWeakLinkage"; 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..2037a91 100644
--- a/lib/Target/Mangler.cpp
+++ b/lib/Target/Mangler.cpp
@@ -180,7 +180,7 @@
ManglerPrefixTy PrefixTy = Mangler::Default;
if (GV->hasPrivateLinkage() || isImplicitlyPrivate)
PrefixTy = Mangler::Private;
- else if (GV->hasLinkerPrivateLinkage())
+ else if (GV->hasLinkerPrivateLinkage() || GV->hasLinkerPrivateWeakLinkage())
PrefixTy = Mangler::LinkerPrivate;
// If this global has a name, handle it simply.
diff --git a/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp b/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp
index c100c59..6656bdc 100644
--- a/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp
+++ b/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp
@@ -138,7 +138,6 @@
// FALL THROUGH
case GlobalValue::InternalLinkage:
case GlobalValue::PrivateLinkage:
- case GlobalValue::LinkerPrivateLinkage:
break;
case GlobalValue::DLLImportLinkage:
llvm_unreachable("DLLImport linkage is not supported by this target!");
diff --git a/lib/Transforms/IPO/MergeFunctions.cpp b/lib/Transforms/IPO/MergeFunctions.cpp
index 622a9b5..74bb2c8 100644
--- a/lib/Transforms/IPO/MergeFunctions.cpp
+++ b/lib/Transforms/IPO/MergeFunctions.cpp
@@ -535,6 +535,7 @@
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
case GlobalValue::ExternalWeakLinkage:
+ case GlobalValue::LinkerPrivateWeakLinkage:
return ExternalWeak;
case GlobalValue::ExternalLinkage:
diff --git a/lib/VMCore/AsmWriter.cpp b/lib/VMCore/AsmWriter.cpp
index 057ad91..e98636b 100644
--- a/lib/VMCore/AsmWriter.cpp
+++ b/lib/VMCore/AsmWriter.cpp
@@ -1419,6 +1419,9 @@
case GlobalValue::ExternalLinkage: break;
case GlobalValue::PrivateLinkage: Out << "private "; break;
case GlobalValue::LinkerPrivateLinkage: Out << "linker_private "; break;
+ case GlobalValue::LinkerPrivateWeakLinkage:
+ Out << "linker_private_weak ";
+ break;
case GlobalValue::InternalLinkage: Out << "internal "; break;
case GlobalValue::LinkOnceAnyLinkage: Out << "linkonce "; break;
case GlobalValue::LinkOnceODRLinkage: Out << "linkonce_odr "; break;
diff --git a/lib/VMCore/Core.cpp b/lib/VMCore/Core.cpp
index 295d148..ca1a399 100644
--- a/lib/VMCore/Core.cpp
+++ b/lib/VMCore/Core.cpp
@@ -1058,6 +1058,8 @@
return LLVMPrivateLinkage;
case GlobalValue::LinkerPrivateLinkage:
return LLVMLinkerPrivateLinkage;
+ case GlobalValue::LinkerPrivateWeakLinkage:
+ return LLVMLinkerPrivateWeakLinkage;
case GlobalValue::DLLImportLinkage:
return LLVMDLLImportLinkage;
case GlobalValue::DLLExportLinkage:
@@ -1108,6 +1110,9 @@
case LLVMLinkerPrivateLinkage:
GV->setLinkage(GlobalValue::LinkerPrivateLinkage);
break;
+ case LLVMLinkerPrivateWeakLinkage:
+ GV->setLinkage(GlobalValue::LinkerPrivateWeakLinkage);
+ break;
case LLVMDLLImportLinkage:
GV->setLinkage(GlobalValue::DLLImportLinkage);
break;