Fix an invalid Twine use spotty by abbeyj, it isn't safe to use Twine

temporaries (this is one reason I'm nervous about propagating their use beyond
particularly performance critical places).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93981 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Frontend/InitPreprocessor.cpp b/lib/Frontend/InitPreprocessor.cpp
index e4c380ae0eddcbace1670623c0d8e7d737a9b78c..f2eb4e642be807add9f068b904b77d67f75c28c9 100644 (file)
--- a/lib/Frontend/InitPreprocessor.cpp
+++ b/lib/Frontend/InitPreprocessor.cpp
@@ -137,7 +137,10 @@ static void DefineFloatMacros(MacroBuilder &Builder, llvm::StringRef Prefix,
                "1.79769313486231580793728971405301e+308L",
                "1.18973149535723176508575932662800702e+4932L");
 
-  llvm::Twine DefPrefix = "__" + Prefix + "_";
+  llvm::SmallString<32> DefPrefix;
+  DefPrefix = "__";
+  DefPrefix += Prefix;
+  DefPrefix += "_";
 
   Builder.defineMacro(DefPrefix + "DENORM_MIN__", DenormMin);
   Builder.defineMacro(DefPrefix + "HAS_DENORM__");