[llvm] r258007 - [TableGen] Use a StringRef instead of creating a new std::string. It gets passed to a function that takes a StringRef anyway. NFC

[Craig Topper via llvm-commits]

Author: ctopper
Date: Sun Jan 17 02:47:02 2016
New Revision: 258007

URL: http://llvm.org/viewvc/llvm-project?rev=258007&view=rev
Log:
[TableGen] Use a StringRef instead of creating a new std::string. It gets passed to a function that takes a StringRef anyway. NFC

Modified:
    llvm/trunk/utils/TableGen/AsmWriterInst.cpp

Modified: llvm/trunk/utils/TableGen/AsmWriterInst.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/AsmWriterInst.cpp?rev=258007&r1=258006&r2=258007&view=diff
==============================================================================
--- llvm/trunk/utils/TableGen/AsmWriterInst.cpp (original)
+++ llvm/trunk/utils/TableGen/AsmWriterInst.cpp Sun Jan 17 02:47:02 2016
@@ -120,8 +120,7 @@ AsmWriterInst::AsmWriterInst(const CodeG
 
       while (VarEnd < AsmString.size() && isIdentChar(AsmString[VarEnd]))
         ++VarEnd;
-      std::string VarName(AsmString.begin()+DollarPos+1,
-                          AsmString.begin()+VarEnd);
+      StringRef VarName(AsmString.data()+DollarPos+1, VarEnd-DollarPos-1);
 
       // Modifier - Support ${foo:modifier} syntax, where "modifier" is passed
       // into printOperand.  Also support ${:feature}, which is passed into
@@ -143,7 +142,7 @@ AsmWriterInst::AsmWriterInst(const CodeG
             PrintFatalError("Reached end of string before terminating curly brace in '"
               + CGI.TheDef->getName() + "'");
 
-          unsigned ModifierStart = VarEnd;
+          std::string::size_type ModifierStart = VarEnd;
           while (VarEnd < AsmString.size() && isIdentChar(AsmString[VarEnd]))
             ++VarEnd;
           Modifier = std::string(AsmString.begin()+ModifierStart,