[PATCH] Adding SmallString support to Twine

[Paweł Bylica]

================
Comment at: lib/MC/MCContext.cpp:176-177
@@ -171,4 +175,4 @@
 MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) {
   SmallString<128> NameSV;
   return GetOrCreateSymbol(Name.toStringRef(NameSV));
 }
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Do you think it is worth to check if `Name` `isSingleStringRef`?

http://reviews.llvm.org/D6372

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