add a new MCAsmStreamer::GetCommentOS method to simplify stuff
that doesn't want to use twines.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94199 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 5564fa1..3f0a9de 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -1126,16 +1126,12 @@
 
 static void EmitGlobalConstantFP(const ConstantFP *CFP, unsigned AddrSpace,
                                  AsmPrinter &AP) {
-  SmallString<128> TmpBuffer;
-  
   // FP Constants are printed as integer constants to avoid losing
   // precision.
   if (CFP->getType()->isDoubleTy()) {
     if (AP.VerboseAsm) {
-      raw_svector_ostream OS(TmpBuffer);
-      double Val = CFP->getValueAPF().convertToDouble();  // for comment only
-      OS << "double " << Val;
-      AP.OutStreamer.AddComment(OS.str());
+      double Val = CFP->getValueAPF().convertToDouble();
+      AP.OutStreamer.GetCommentOS() << "double " << Val << '\n';
     }
 
     uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue();