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 {
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