[llvm-commits] [llvm] r44294 - /llvm/trunk/lib/Support/APInt.cpp

[Chris Lattner]

Author: lattner
Date: Fri Nov 23 16:36:25 2007
New Revision: 44294

URL: http://llvm.org/viewvc/llvm-project?rev=44294&view=rev
Log:
Fix APInt::countTrailingZeros to return BitWidth if the input is zero instead of returning some random large number.

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=44294&r1=44293&r2=44294&view=diff

==============================================================================
--- llvm/trunk/lib/Support/APInt.cpp (original)
+++ llvm/trunk/lib/Support/APInt.cpp Fri Nov 23 16:36:25 2007
@@ -782,14 +782,14 @@
 
 uint32_t APInt::countTrailingZeros() const {
   if (isSingleWord())
-    return CountTrailingZeros_64(VAL);
+    return std::min(CountTrailingZeros_64(VAL), BitWidth);
   uint32_t Count = 0;
   uint32_t i = 0;
   for (; i < getNumWords() && pVal[i] == 0; ++i)
     Count += APINT_BITS_PER_WORD;
   if (i < getNumWords())
     Count += CountTrailingZeros_64(pVal[i]);
-  return Count;
+  return std::min(Count, BitWidth);
 }
 
 uint32_t APInt::countPopulation() const {