MC: Add target hook to control symbol quoting

llvm-svn: 239370
diff --git a/llvm/lib/Target/NVPTX/NVPTXMCExpr.cpp b/llvm/lib/Target/NVPTX/NVPTXMCExpr.cpp
index 407986a..3c98b9f 100644
--- a/llvm/lib/Target/NVPTX/NVPTXMCExpr.cpp
+++ b/llvm/lib/Target/NVPTX/NVPTXMCExpr.cpp
@@ -20,7 +20,7 @@
   return new (Ctx) NVPTXFloatMCExpr(Kind, Flt);
 }
 
-void NVPTXFloatMCExpr::printImpl(raw_ostream &OS) const {
+void NVPTXFloatMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
   bool Ignored;
   unsigned NumHex;
   APFloat APF = getAPFloat();
@@ -52,6 +52,9 @@
   return new (Ctx) NVPTXGenericMCSymbolRefExpr(SymExpr);
 }
 
-void NVPTXGenericMCSymbolRefExpr::printImpl(raw_ostream &OS) const {
-  OS << "generic(" << *SymExpr << ")";
+void NVPTXGenericMCSymbolRefExpr::printImpl(raw_ostream &OS,
+                                            const MCAsmInfo *MAI) const {
+  OS << "generic(";
+  SymExpr->print(OS, MAI);
+  OS << ")";
 }