Reduce string trashing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109386 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/VMCore/InlineAsm.cpp b/lib/VMCore/InlineAsm.cpp
index 0d2eca9c3dea610cef439e27a7273a06592e9c3e..69f713b2c42c29d3d1f10cceea2a698784c5c347 100644 (file)
--- a/lib/VMCore/InlineAsm.cpp
+++ b/lib/VMCore/InlineAsm.cpp
@@ -164,7 +164,7 @@ InlineAsm::ParseConstraints(StringRef Constraints) {
     StringRef::iterator ConstraintEnd = std::find(I, E, ',');
 
     if (ConstraintEnd == I ||  // Empty constraint like ",,"
-        Info.Parse(std::string(I, ConstraintEnd), Result)) {
+        Info.Parse(StringRef(I, ConstraintEnd-I), Result)) {
       Result.clear();          // Erroneous constraint?
       break;
     }