[TableGen] Avoid unnecessary std::string creations

Avoid unnecessary std::string creations in the TreePredicateFn getters.

llvm-svn: 315826

1 files changed, 6 insertions, 7 deletions

diff --git a/llvm/utils/TableGen/CodeGenDAGPatterns.h b/llvm/utils/TableGen/CodeGenDAGPatterns.h
index 5918e901a3d..2103e154dad 100644
--- a/llvm/utils/TableGen/CodeGenDAGPatterns.h
+++ b/llvm/utils/TableGen/CodeGenDAGPatterns.h
@@ -452,13 +452,12 @@ public:
   /// getImmediatePredicateCode - Return the code that evaluates this pattern if
   /// this is an immediate predicate.  It is an error to call this on a
   /// non-immediate pattern.
-  std::string getImmediatePredicateCode() const {
-    std::string Result = getImmCode();
+  StringRef getImmediatePredicateCode() const {
+    StringRef Result = getImmCode();
     assert(!Result.empty() && "Isn't an immediate pattern!");
     return Result;
   }
 
-
   bool operator==(const TreePredicateFn &RHS) const {
     return PatFragRec == RHS.PatFragRec;
   }
@@ -476,15 +475,15 @@ public:
   std::string getCodeToRunOnSDNode() const;
 
   /// Get the data type of the argument to getImmediatePredicateCode().
-  std::string getImmType() const;
+  StringRef getImmType() const;
 
   /// Get a string that describes the type returned by getImmType() but is
   /// usable as part of an identifier.
-  std::string getImmTypeIdentifier() const;
+  StringRef getImmTypeIdentifier() const;
 
 private:
-  std::string getPredCode() const;
-  std::string getImmCode() const;
+  StringRef getPredCode() const;
+  StringRef getImmCode() const;
   bool immCodeUsesAPInt() const;
   bool immCodeUsesAPFloat() const;
 };