[llvm] r302816 - [APInt] Remove an APInt copy from the return of APInt::multiplicativeInverse.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Thu May 11 13:40:53 2017
New Revision: 302816

URL: http://llvm.org/viewvc/llvm-project?rev=302816&view=rev
Log:
[APInt] Remove an APInt copy from the return of APInt::multiplicativeInverse.

Modified:
    llvm/trunk/lib/Support/APInt.cpp

Modified: llvm/trunk/lib/Support/APInt.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/APInt.cpp?rev=302816&r1=302815&r2=302816&view=diff
==============================================================================
--- llvm/trunk/lib/Support/APInt.cpp (original)
+++ llvm/trunk/lib/Support/APInt.cpp Thu May 11 13:40:53 2017
@@ -1141,7 +1141,10 @@ APInt APInt::multiplicativeInverse(const
   // interested in a positive inverse. Calculate a positive one from a negative
   // one if necessary. A simple addition of the modulo suffices because
   // abs(t[i]) is known to be less than *this/2 (see the link above).
-  return t[i].isNegative() ? t[i] + modulo : t[i];
+  if (t[i].isNegative())
+    t[i] += modulo;
+
+  return std::move(t[i]);
 }
 
 /// Calculate the magic numbers required to implement a signed integer division