rename getSpelledCharacterAt to getSpellingOfSingleCharacterNumericConstant,
optimize it to use the LiteralData when possible.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63060 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 9b91ec6..9e80946 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -869,7 +869,7 @@
   // Fast path for a single digit (which is quite common).  A single digit
   // cannot have a trigraph, escaped newline, radix prefix, or type suffix.
   if (Tok.getLength() == 1) {
-    const char Val = PP.getSpelledCharacterAt(Tok.getLocation());
+    const char Val = PP.getSpellingOfSingleCharacterNumericConstant(Tok);
     unsigned IntSize = Context.Target.getIntWidth();
     return Owned(new (Context) IntegerLiteral(llvm::APInt(IntSize, Val-'0'),
                     Context.IntTy, Tok.getLocation()));