Merge from mainline.

Revert the part of 45849 that treated weak globals
as weak globals rather than commons.  While not wrong,
this change tickled a latent bug in Darwin's strip,
so revert it for now as a workaround.

llvm-svn: 46168

Author: tlattner

llvm/lib/Target/ARM/ARMAsmPrinter.cpp

@@ -845,9 +845,8 @@ bool ARMAsmPrinter::doFinalization(Module &M) {
         }
       }
 
-      if (I->hasInternalLinkage() || 
-           (!Subtarget->isTargetDarwin() && 
-            (I->hasWeakLinkage() || I->hasLinkOnceLinkage()))) {
+      if (I->hasInternalLinkage() || I->hasWeakLinkage() ||
+          I->hasLinkOnceLinkage()) {
         if (Size == 0) Size = 1;   // .comm Foo, 0 is undefined, avoid it.
         if (!NoZerosInBSS && TAI->getBSSSection())
           SwitchToDataSection(TAI->getBSSSection(), I);