[llvm] r301091 - [APInt] Remove unnecessary min with BitWidth from countTrailingOnesSlowCase.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Sat Apr 22 14:59:11 2017
New Revision: 301091

URL: http://llvm.org/viewvc/llvm-project?rev=301091&view=rev
Log:
[APInt] Remove unnecessary min with BitWidth from countTrailingOnesSlowCase.

The unused upper bits are guaranteed to be 0 so we don't need to worry about accidentally counting them.

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=301091&r1=301090&r2=301091&view=diff
==============================================================================
--- llvm/trunk/lib/Support/APInt.cpp (original)
+++ llvm/trunk/lib/Support/APInt.cpp Sat Apr 22 14:59:11 2017
@@ -688,7 +688,8 @@ unsigned APInt::countTrailingOnesSlowCas
     Count += APINT_BITS_PER_WORD;
   if (i < getNumWords())
     Count += llvm::countTrailingOnes(pVal[i]);
-  return std::min(Count, BitWidth);
+  assert(Count <= BitWidth);
+  return Count;
 }
 
 unsigned APInt::countPopulationSlowCase() const {