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

llvm-svn: 258007
This commit is contained in:
Craig Topper 2016-01-17 08:47:02 +00:00
parent ede597c753
commit e8453b0d88
1 changed files with 2 additions and 3 deletions
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5
llvm/utils/TableGen/AsmWriterInst.cpp
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@ -120,8 +120,7 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned CGIIndex,
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 CodeGenInstruction &CGI, unsigned CGIIndex,
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,