EmitZerofill should take a 64-bit size or else it's chopping off large zero-filled global. rdar://11729134

llvm-svn: 159023
diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
index 1b7d037..373df4b 100644
--- a/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/llvm/lib/MC/MCAsmStreamer.cpp
@@ -171,7 +171,7 @@
                                      unsigned ByteAlignment);
 
   virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
-                            unsigned Size = 0, unsigned ByteAlignment = 0);
+                            uint64_t Size = 0, unsigned ByteAlignment = 0);
 
   virtual void EmitTBSSSymbol (const MCSection *Section, MCSymbol *Symbol,
                                uint64_t Size, unsigned ByteAlignment = 0);
@@ -529,7 +529,7 @@
 }
 
 void MCAsmStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
-                                 unsigned Size, unsigned ByteAlignment) {
+                                 uint64_t Size, unsigned ByteAlignment) {
   // Note: a .zerofill directive does not switch sections.
   OS << ".zerofill ";