Add support for 'weak' linkage.

llvm-svn: 9171
diff --git a/llvm/lib/Target/X86/Printer.cpp b/llvm/lib/Target/X86/Printer.cpp
index fbc6b6e..f8c006c 100644
--- a/llvm/lib/Target/X86/Printer.cpp
+++ b/llvm/lib/Target/X86/Printer.cpp
@@ -948,7 +948,8 @@
       unsigned Align = TD.getTypeAlignment(C->getType());
 
       if (C->isNullValue() && 
-          (I->hasLinkOnceLinkage() || I->hasInternalLinkage())) {
+          (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
+           I->hasWeakLinkage() /* FIXME: Verify correct */)) {
         SwitchSection(O, CurSection, ".data");
         if (I->hasInternalLinkage())
           O << "\t.local " << name << "\n";
@@ -961,6 +962,7 @@
       } else {
         switch (I->getLinkage()) {
         case GlobalValue::LinkOnceLinkage:
+        case GlobalValue::WeakLinkage:   // FIXME: Verify correct for weak.
           // Nonnull linkonce -> weak
           O << "\t.weak " << name << "\n";
           SwitchSection(O, CurSection, "");