Add CommonLinkage; currently tentative definitions
are represented as "weak", but there are subtle differences
in some cases on Darwin, so we need both. The intent
is that "common" will behave identically to "weak" unless
somebody changes their target to do something else.
No functional change as yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51118 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/GlobalValue.h b/include/llvm/GlobalValue.h
index 808471d..60b2d1c 100644
--- a/include/llvm/GlobalValue.h
+++ b/include/llvm/GlobalValue.h
@@ -38,7 +38,8 @@
DLLImportLinkage, ///< Function to be imported from DLL
DLLExportLinkage, ///< Function to be accessible from DLL
ExternalWeakLinkage,///< ExternalWeak linkage description
- GhostLinkage ///< Stand-in functions for streaming fns from BC files
+ GhostLinkage, ///< Stand-in functions for streaming fns from BC files
+ CommonLinkage ///< Tentative definitions
};
/// @brief An enumeration for the kinds of visibility of global values.
@@ -100,6 +101,7 @@
bool hasExternalLinkage() const { return Linkage == ExternalLinkage; }
bool hasLinkOnceLinkage() const { return Linkage == LinkOnceLinkage; }
bool hasWeakLinkage() const { return Linkage == WeakLinkage; }
+ bool hasCommonLinkage() const { return Linkage == CommonLinkage; }
bool hasAppendingLinkage() const { return Linkage == AppendingLinkage; }
bool hasInternalLinkage() const { return Linkage == InternalLinkage; }
bool hasDLLImportLinkage() const { return Linkage == DLLImportLinkage; }
diff --git a/lib/AsmParser/LLLexer.cpp b/lib/AsmParser/LLLexer.cpp
index 6787ba1..37032eb 100644
--- a/lib/AsmParser/LLLexer.cpp
+++ b/lib/AsmParser/LLLexer.cpp
@@ -451,6 +451,7 @@
KEYWORD("appending", APPENDING);
KEYWORD("dllimport", DLLIMPORT);
KEYWORD("dllexport", DLLEXPORT);
+ KEYWORD("common", COMMON);
KEYWORD("hidden", HIDDEN);
KEYWORD("protected", PROTECTED);
KEYWORD("extern_weak", EXTERN_WEAK);
diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp
index 4098266..2d421b4 100644
--- a/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -66,6 +66,7 @@
case 5: return GlobalValue::DLLImportLinkage;
case 6: return GlobalValue::DLLExportLinkage;
case 7: return GlobalValue::ExternalWeakLinkage;
+ case 8: return GlobalValue::CommonLinkage;
}
}
diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index 40e7011..8e9a395 100644
--- a/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -270,6 +270,7 @@
case GlobalValue::DLLImportLinkage: return 5;
case GlobalValue::DLLExportLinkage: return 6;
case GlobalValue::ExternalWeakLinkage: return 7;
+ case GlobalValue::CommonLinkage: return 8;
}
}
diff --git a/lib/CodeGen/ELFWriter.cpp b/lib/CodeGen/ELFWriter.cpp
index 63fee3a..27f23f4 100644
--- a/lib/CodeGen/ELFWriter.cpp
+++ b/lib/CodeGen/ELFWriter.cpp
@@ -282,7 +282,8 @@
// If this global is part of the common block, add it now. Variables are
// part of the common block if they are zero initialized and allowed to be
// merged with other symbols.
- if (GV->hasLinkOnceLinkage() || GV->hasWeakLinkage()) {
+ if (GV->hasLinkOnceLinkage() || GV->hasWeakLinkage() ||
+ GV->hasCommonLinkage()) {
ELFSym CommonSym(GV);
// Value for common symbols is the alignment required.
CommonSym.Value = Align;
@@ -313,7 +314,7 @@
BSSSym.SetType(ELFSym::STT_OBJECT);
switch (GV->getLinkage()) {
- default: // weak/linkonce handled above
+ default: // weak/linkonce/common handled above
assert(0 && "Unexpected linkage type!");
case GlobalValue::AppendingLinkage: // FIXME: This should be improved!
case GlobalValue::ExternalLinkage:
diff --git a/lib/CodeGen/MachOWriter.cpp b/lib/CodeGen/MachOWriter.cpp
index 2726f70..c2b42ec 100644
--- a/lib/CodeGen/MachOWriter.cpp
+++ b/lib/CodeGen/MachOWriter.cpp
@@ -403,7 +403,8 @@
// If this global is part of the common block, add it now. Variables are
// part of the common block if they are zero initialized and allowed to be
// merged with other symbols.
- if (NoInit || GV->hasLinkOnceLinkage() || GV->hasWeakLinkage()) {
+ if (NoInit || GV->hasLinkOnceLinkage() || GV->hasWeakLinkage() ||
+ GV->hasCommonLinkage()) {
MachOSym ExtOrCommonSym(GV, Mang->getValueName(GV), MachOSym::NO_SECT,TM);
// For undefined (N_UNDF) external (N_EXT) types, n_value is the size in
// bytes of the symbol.
@@ -951,6 +952,7 @@
break;
case GlobalValue::WeakLinkage:
case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::CommonLinkage:
assert(!isa<Function>(gv) && "Unexpected linkage type for Function!");
case GlobalValue::ExternalLinkage:
GVName = TAI->getGlobalPrefix() + name;
diff --git a/lib/ExecutionEngine/ExecutionEngine.cpp b/lib/ExecutionEngine/ExecutionEngine.cpp
index a56951d..8bd3b11 100644
--- a/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -884,7 +884,7 @@
continue;
// Otherwise, we know it's linkonce/weak, replace it if this is a strong
- // symbol.
+ // symbol. FIXME is this right for common?
if (GV->hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
GVEntry = GV;
}
diff --git a/lib/Linker/LinkModules.cpp b/lib/Linker/LinkModules.cpp
index 3db5b09..cf4ceaa 100644
--- a/lib/Linker/LinkModules.cpp
+++ b/lib/Linker/LinkModules.cpp
@@ -410,10 +410,12 @@
"': can only link appending global with another appending global!");
LinkFromSrc = true; // Special cased.
LT = Src->getLinkage();
- } else if (Src->hasWeakLinkage() || Src->hasLinkOnceLinkage()) {
- // At this point we know that Dest has LinkOnce, External*, Weak, or
- // DLL* linkage.
- if ((Dest->hasLinkOnceLinkage() && Src->hasWeakLinkage()) ||
+ } else if (Src->hasWeakLinkage() || Src->hasLinkOnceLinkage() ||
+ Src->hasCommonLinkage()) {
+ // At this point we know that Dest has LinkOnce, External*, Weak, Common,
+ // or DLL* linkage.
+ if ((Dest->hasLinkOnceLinkage() &&
+ (Src->hasWeakLinkage() || Src->hasCommonLinkage())) ||
Dest->hasExternalWeakLinkage()) {
LinkFromSrc = true;
LT = Src->getLinkage();
@@ -421,7 +423,8 @@
LinkFromSrc = false;
LT = Dest->getLinkage();
}
- } else if (Dest->hasWeakLinkage() || Dest->hasLinkOnceLinkage()) {
+ } else if (Dest->hasWeakLinkage() || Dest->hasLinkOnceLinkage() ||
+ Dest->hasCommonLinkage()) {
// At this point we know that Src has External* or DLL* linkage.
if (Src->hasExternalWeakLinkage()) {
LinkFromSrc = false;
@@ -792,10 +795,12 @@
if (DGV->getInitializer() != SInit)
return Error(Err, "Global Variable Collision on '" + SGV->getName() +
"': global variables have different initializers");
- } else if (DGV->hasLinkOnceLinkage() || DGV->hasWeakLinkage()) {
+ } else if (DGV->hasLinkOnceLinkage() || DGV->hasWeakLinkage() ||
+ DGV->hasCommonLinkage()) {
// Nothing is required, mapped values will take the new global
// automatically.
- } else if (SGV->hasLinkOnceLinkage() || SGV->hasWeakLinkage()) {
+ } else if (SGV->hasLinkOnceLinkage() || SGV->hasWeakLinkage() ||
+ SGV->hasCommonLinkage()) {
// Nothing is required, mapped values will take the new global
// automatically.
} else if (DGV->hasAppendingLinkage()) {
@@ -916,16 +921,19 @@
DF->setLinkage(SF->getLinkage());
// Visibility of prototype is overridden by vis of definition.
DF->setVisibility(SF->getVisibility());
- } else if (SF->hasWeakLinkage() || SF->hasLinkOnceLinkage()) {
+ } else if (SF->hasWeakLinkage() || SF->hasLinkOnceLinkage() ||
+ SF->hasCommonLinkage()) {
// At this point we know that DF has LinkOnce, Weak, or External* linkage.
ValueMap[SF] = DF;
// Linkonce+Weak = Weak
// *+External Weak = *
- if ((DF->hasLinkOnceLinkage() && SF->hasWeakLinkage()) ||
+ if ((DF->hasLinkOnceLinkage() &&
+ (SF->hasWeakLinkage() || SF->hasCommonLinkage())) ||
DF->hasExternalWeakLinkage())
DF->setLinkage(SF->getLinkage());
- } else if (DF->hasWeakLinkage() || DF->hasLinkOnceLinkage()) {
+ } else if (DF->hasWeakLinkage() || DF->hasLinkOnceLinkage() ||
+ DF->hasCommonLinkage()) {
// At this point we know that SF has LinkOnce or External* linkage.
ValueMap[SF] = DF;
if (!SF->hasLinkOnceLinkage() && !SF->hasExternalWeakLinkage())
diff --git a/lib/Target/Alpha/AlphaAsmPrinter.cpp b/lib/Target/Alpha/AlphaAsmPrinter.cpp
index 42e4b78..2c28971 100644
--- a/lib/Target/Alpha/AlphaAsmPrinter.cpp
+++ b/lib/Target/Alpha/AlphaAsmPrinter.cpp
@@ -225,6 +225,7 @@
switch (I->getLinkage()) {
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage:
+ case GlobalValue::CommonLinkage:
O << TAI->getWeakRefDirective() << name << '\n';
break;
case GlobalValue::AppendingLinkage:
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index dcc920a..f52322b 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -1604,7 +1604,8 @@
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
- if (I->hasExternalLinkage() || I->hasExternalWeakLinkage())
+ if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
+ I->hasCommonLinkage())
Out << "extern ";
else if (I->hasDLLImportLinkage())
Out << "__declspec(dllimport) ";
@@ -1678,6 +1679,8 @@
if (I->hasLinkOnceLinkage())
Out << " __attribute__((common))";
+ else if (I->hasCommonLinkage()) // FIXME is this right?
+ Out << " __ATTRIBUTE_WEAK__";
else if (I->hasWeakLinkage())
Out << " __ATTRIBUTE_WEAK__";
else if (I->hasExternalWeakLinkage())
@@ -1715,6 +1718,8 @@
Out << " __attribute__((common))";
else if (I->hasWeakLinkage())
Out << " __ATTRIBUTE_WEAK__";
+ else if (I->hasCommonLinkage())
+ Out << " __ATTRIBUTE_WEAK__";
if (I->hasHiddenVisibility())
Out << " __HIDDEN__";
@@ -1724,6 +1729,7 @@
// this, however, occurs when the variable has weak linkage. In this
// case, the assembler will complain about the variable being both weak
// and common, so we disable this optimization.
+ // FIXME common linkage should avoid this problem.
if (!I->getInitializer()->isNullValue()) {
Out << " = " ;
writeOperand(I->getInitializer());
diff --git a/lib/Target/CellSPU/SPUAsmPrinter.cpp b/lib/Target/CellSPU/SPUAsmPrinter.cpp
index f627896..4e4324b 100644
--- a/lib/Target/CellSPU/SPUAsmPrinter.cpp
+++ b/lib/Target/CellSPU/SPUAsmPrinter.cpp
@@ -340,7 +340,7 @@
// stubs
if (TM.getRelocationModel() != Reloc::Static) {
if (((GV->isDeclaration() || GV->hasWeakLinkage() ||
- GV->hasLinkOnceLinkage()))) {
+ GV->hasLinkOnceLinkage() || GV->hasCommonLinkage()))) {
GVStubs.insert(Name);
O << "L" << Name << "$non_lazy_ptr";
return;
@@ -510,7 +510,7 @@
if (C->isNullValue() && /* FIXME: Verify correct */
(I->hasInternalLinkage() || I->hasWeakLinkage() ||
- I->hasLinkOnceLinkage() ||
+ I->hasLinkOnceLinkage() || I->hasCommonLinkage() ||
(I->hasExternalLinkage() && !I->hasSection()))) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (I->hasExternalLinkage()) {
@@ -537,6 +537,7 @@
switch (I->getLinkage()) {
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage:
+ case GlobalValue::CommonLinkage:
O << "\t.global " << name << '\n'
<< "\t.weak_definition " << name << '\n';
SwitchToDataSection(".section __DATA,__datacoal_nt,coalesced", I);
diff --git a/lib/Target/CppBackend/CPPBackend.cpp b/lib/Target/CppBackend/CPPBackend.cpp
index 8724073..dc9a11e 100644
--- a/lib/Target/CppBackend/CPPBackend.cpp
+++ b/lib/Target/CppBackend/CPPBackend.cpp
@@ -301,6 +301,8 @@
Out << "GlobalValue::ExternalWeakLinkage"; break;
case GlobalValue::GhostLinkage:
Out << "GlobalValue::GhostLinkage"; break;
+ case GlobalValue::CommonLinkage:
+ Out << "GlobalValue::CommonLinkage"; break;
}
}
diff --git a/lib/Target/IA64/IA64AsmPrinter.cpp b/lib/Target/IA64/IA64AsmPrinter.cpp
index 829730d..037687c 100644
--- a/lib/Target/IA64/IA64AsmPrinter.cpp
+++ b/lib/Target/IA64/IA64AsmPrinter.cpp
@@ -275,6 +275,7 @@
if (C->isNullValue() &&
(I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
+ I->hasCommonLinkage() ||
I->hasWeakLinkage() /* FIXME: Verify correct */)) {
SwitchToDataSection(".data", I);
if (I->hasInternalLinkage()) {
@@ -289,6 +290,7 @@
} else {
switch (I->getLinkage()) {
case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::CommonLinkage:
case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
// Nonnull linkonce -> weak
O << "\t.weak " << name << "\n";
diff --git a/lib/Target/Mips/MipsAsmPrinter.cpp b/lib/Target/Mips/MipsAsmPrinter.cpp
index 6c0c908..6ae6104 100644
--- a/lib/Target/Mips/MipsAsmPrinter.cpp
+++ b/lib/Target/Mips/MipsAsmPrinter.cpp
@@ -461,7 +461,8 @@
// Is this correct ?
if (C->isNullValue() && (I->hasLinkOnceLinkage() ||
- I->hasInternalLinkage() || I->hasWeakLinkage()))
+ I->hasInternalLinkage() || I->hasWeakLinkage() ||
+ I->hasCommonLinkage()))
{
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
@@ -487,7 +488,8 @@
switch (I->getLinkage())
{
case GlobalValue::LinkOnceLinkage:
- case GlobalValue::WeakLinkage:
+ case GlobalValue::CommonLinkage:
+ case GlobalValue::WeakLinkage:
// FIXME: Verify correct for weak.
// Nonnull linkonce -> weak
O << "\t.weak " << name << "\n";
diff --git a/lib/Target/PIC16/PIC16AsmPrinter.cpp b/lib/Target/PIC16/PIC16AsmPrinter.cpp
index f211fac..15711b5 100644
--- a/lib/Target/PIC16/PIC16AsmPrinter.cpp
+++ b/lib/Target/PIC16/PIC16AsmPrinter.cpp
@@ -414,7 +414,7 @@
if (!I->hasSection() &&
(I->hasInternalLinkage() || I->hasWeakLinkage() ||
- I->hasLinkOnceLinkage())) {
+ I->hasLinkOnceLinkage() || I->hasCommonLinkage())) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (!NoZerosInBSS && TAI->getBSSSection())
SwitchToDataSection(M.getModuleIdentifier().c_str(), I);
diff --git a/lib/Target/PowerPC/PPCAsmPrinter.cpp b/lib/Target/PowerPC/PPCAsmPrinter.cpp
index 4cc9d2a..96e1ae8 100644
--- a/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ b/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -185,7 +185,7 @@
if (MO.getType() == MachineOperand::MO_GlobalAddress) {
GlobalValue *GV = MO.getGlobal();
if (((GV->isDeclaration() || GV->hasWeakLinkage() ||
- GV->hasLinkOnceLinkage()))) {
+ GV->hasLinkOnceLinkage() || GV->hasCommonLinkage()))) {
// Dynamically-resolved functions need a stub for the function.
std::string Name = Mang->getValueName(GV);
FnStubs.insert(Name);
@@ -390,7 +390,7 @@
// External or weakly linked global variables need non-lazily-resolved stubs
if (TM.getRelocationModel() != Reloc::Static) {
if (((GV->isDeclaration() || GV->hasWeakLinkage() ||
- GV->hasLinkOnceLinkage()))) {
+ GV->hasLinkOnceLinkage() || GV->hasCommonLinkage()))) {
GVStubs.insert(Name);
O << "L" << Name << "$non_lazy_ptr";
return;
@@ -671,8 +671,8 @@
unsigned Align = TD->getPreferredAlignmentLog(I);
if (C->isNullValue() && /* FIXME: Verify correct */
- !I->hasSection() &&
- (I->hasInternalLinkage() || I->hasWeakLinkage() ||
+ !I->hasSection() && (I->hasCommonLinkage() ||
+ I->hasInternalLinkage() || I->hasWeakLinkage() ||
I->hasLinkOnceLinkage() || I->hasExternalLinkage())) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (I->hasExternalLinkage()) {
@@ -696,6 +696,7 @@
switch (I->getLinkage()) {
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage:
+ case GlobalValue::CommonLinkage:
O << "\t.global " << name << '\n'
<< "\t.type " << name << ", @object\n"
<< "\t.weak " << name << '\n';
@@ -936,8 +937,8 @@
unsigned Align = TD->getPreferredAlignmentLog(I);
if (C->isNullValue() && /* FIXME: Verify correct */
- !I->hasSection() &&
- (I->hasInternalLinkage() || I->hasWeakLinkage() ||
+ !I->hasSection() && (I->hasCommonLinkage() ||
+ I->hasInternalLinkage() || I->hasWeakLinkage() ||
I->hasLinkOnceLinkage() || I->hasExternalLinkage())) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (I->hasExternalLinkage()) {
@@ -961,6 +962,7 @@
switch (I->getLinkage()) {
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage:
+ case GlobalValue::CommonLinkage:
O << "\t.globl " << name << '\n'
<< "\t.weak_definition " << name << '\n';
SwitchToDataSection("\t.section __DATA,__datacoal_nt,coalesced", I);
diff --git a/lib/Target/Sparc/SparcAsmPrinter.cpp b/lib/Target/Sparc/SparcAsmPrinter.cpp
index 01bd092..2011ab9 100644
--- a/lib/Target/Sparc/SparcAsmPrinter.cpp
+++ b/lib/Target/Sparc/SparcAsmPrinter.cpp
@@ -231,8 +231,8 @@
unsigned Size = TD->getABITypeSize(C->getType());
unsigned Align = TD->getPreferredAlignment(I);
- if (C->isNullValue() &&
- (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
+ if (C->isNullValue() && (I->hasCommonLinkage() ||
+ I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
I->hasWeakLinkage() /* FIXME: Verify correct */)) {
SwitchToDataSection(".data", I);
if (I->hasInternalLinkage())
@@ -243,6 +243,7 @@
O << "\n";
} else {
switch (I->getLinkage()) {
+ case GlobalValue::CommonLinkage:
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
// Nonnull linkonce -> weak
diff --git a/lib/Target/X86/X86ATTAsmPrinter.cpp b/lib/Target/X86/X86ATTAsmPrinter.cpp
index 6909da1..4659deb 100644
--- a/lib/Target/X86/X86ATTAsmPrinter.cpp
+++ b/lib/Target/X86/X86ATTAsmPrinter.cpp
@@ -309,7 +309,8 @@
// non-lazily-resolved stubs
if (GV->isDeclaration() ||
GV->hasWeakLinkage() ||
- GV->hasLinkOnceLinkage()) {
+ GV->hasLinkOnceLinkage() ||
+ GV->hasCommonLinkage()) {
// Dynamically-resolved functions need a stub for the function.
if (isCallOp && isa<Function>(GV)) {
FnStubs.insert(Name);
diff --git a/lib/Target/X86/X86AsmPrinter.cpp b/lib/Target/X86/X86AsmPrinter.cpp
index e1bc65f..3898a9e 100644
--- a/lib/Target/X86/X86AsmPrinter.cpp
+++ b/lib/Target/X86/X86AsmPrinter.cpp
@@ -200,7 +200,7 @@
if (!I->isThreadLocal() &&
(I->hasInternalLinkage() || I->hasWeakLinkage() ||
- I->hasLinkOnceLinkage())) {
+ I->hasLinkOnceLinkage() || I->hasCommonLinkage())) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (!NoZerosInBSS && TAI->getBSSSection())
SwitchToDataSection(TAI->getBSSSection(), I);
@@ -235,6 +235,7 @@
}
switch (I->getLinkage()) {
+ case GlobalValue::CommonLinkage:
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage:
if (Subtarget->isTargetDarwin()) {
diff --git a/lib/Target/X86/X86IntelAsmPrinter.cpp b/lib/Target/X86/X86IntelAsmPrinter.cpp
index ddd90cd..a1031bd 100644
--- a/lib/Target/X86/X86IntelAsmPrinter.cpp
+++ b/lib/Target/X86/X86IntelAsmPrinter.cpp
@@ -373,6 +373,7 @@
bool bCustomSegment = false;
switch (I->getLinkage()) {
+ case GlobalValue::CommonLinkage:
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage:
SwitchToDataSection("");
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index 98d80c8..23ceb9b 100644
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -41,6 +41,7 @@
if (isTargetDarwin()) {
return (!isDirectCall &&
(GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
+ GV->hasCommonLinkage() ||
(GV->isDeclaration() && !GV->hasNotBeenReadFromBitcode())));
} else if (isTargetELF()) {
// Extra load is needed for all non-statics.
diff --git a/lib/VMCore/AsmWriter.cpp b/lib/VMCore/AsmWriter.cpp
index 06bfc50..3d39553 100644
--- a/lib/VMCore/AsmWriter.cpp
+++ b/lib/VMCore/AsmWriter.cpp
@@ -930,6 +930,7 @@
} else {
switch (GV->getLinkage()) {
case GlobalValue::InternalLinkage: Out << "internal "; break;
+ case GlobalValue::CommonLinkage: Out << "common "; break;
case GlobalValue::LinkOnceLinkage: Out << "linkonce "; break;
case GlobalValue::WeakLinkage: Out << "weak "; break;
case GlobalValue::AppendingLinkage: Out << "appending "; break;
@@ -1049,6 +1050,7 @@
case GlobalValue::InternalLinkage: Out << "internal "; break;
case GlobalValue::LinkOnceLinkage: Out << "linkonce "; break;
case GlobalValue::WeakLinkage: Out << "weak "; break;
+ case GlobalValue::CommonLinkage: Out << "common "; break;
case GlobalValue::AppendingLinkage: Out << "appending "; break;
case GlobalValue::DLLImportLinkage: Out << "dllimport "; break;
case GlobalValue::DLLExportLinkage: Out << "dllexport "; break;