Make a convenient helper for printing offsets.

llvm-svn: 59872
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index a641d0b..bfc2e35 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -1526,6 +1526,13 @@
   }
 }
 
+void AsmPrinter::printOffset(int64_t Offset) const {
+  if (Offset > 0)
+    O << '+' << Offset;
+  else if (Offset < 0)
+    O << Offset;
+}
+
 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
   if (!S->usesMetadata())
     return 0;