From: Craig Topper <craig.topper@gmail.com>
Date: Sat, 22 Apr 2017 19:59:11 +0000 (+0000)
Subject: [APInt] Remove unnecessary min with BitWidth from countTrailingOnesSlowCase.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e14494685b3875d686bd1c68e1e945798ae3f89a;p=llvm

[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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301091 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 95b8345b9c6..9bb364af279 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -688,7 +688,8 @@ unsigned APInt::countTrailingOnesSlowCase() const {
     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 {