A initialized global variable cannot be extern weak. However, if a global value's initializer is itself a external weak symbol, emit the weak reference.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32069 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/Target/PowerPC/PPCAsmPrinter.cpp b/lib/Target/PowerPC/PPCAsmPrinter.cpp
index fdc335d4cf..0998c29226 100644
--- a/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ b/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -605,6 +605,9 @@ bool DarwinAsmPrinter::doFinalization(Module &M) {
     } else {
       switch (I->getLinkage()) {
       case GlobalValue::LinkOnceLinkage:
+      case GlobalValue::ExternalWeakLinkage:
+        O << "\t.weak_reference " << name << "\n";
+        break;
       case GlobalValue::WeakLinkage:
         O << "\t.globl " << name << '\n'
           << "\t.weak_definition " << name << '\n';
@@ -635,6 +638,13 @@ bool DarwinAsmPrinter::doFinalization(Module &M) {
 
       EmitAlignment(Align, I);
       O << name << ":\t\t\t\t; '" << I->getName() << "'\n";
+
+      // If the initializer is a extern weak symbol, remember to emit the weak
+      // reference!
+      if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
+        if (GV->hasExternalWeakLinkage())
+          ExtWeakSymbols.insert(Mang->getValueName(GV));
+
       EmitGlobalConstant(C);
       O << '\n';
     }