Changes in directory llvm/lib/Support:
APInt.cpp updated: 1.25 -> 1.26
---
Log message:
Fix countLeadingZeros to actually return the correct number.
Fix toString to correctly return "0" for zero valued APInts over 128 bits.
---
Diffs of the changes: (+13 -11)
APInt.cpp | 24 +++++++++++++-----------
1 files changed, 13 insertions(+), 11 deletions(-)
Index: llvm/lib/Support/APInt.cpp
diff -u llvm/lib/Support/APInt.cpp:1.25 llvm/lib/Support/APInt.cpp:1.26
--- llvm/lib/Support/APInt.cpp:1.25 Tue Feb 20 17:40:25 2007
+++ llvm/lib/Support/APInt.cpp Tue Feb 20 18:29:48 2007
@@ -696,18 +696,20 @@
/// the number of zeros from the most significant bit to the first one bit.
/// @returns numWord() * 64 if the value is zero.
uint32_t APInt::countLeadingZeros() const {
- if (isSingleWord())
- return CountLeadingZeros_64(VAL) - (APINT_BITS_PER_WORD - BitWidth);
uint32_t Count = 0;
- for (uint32_t i = getNumWords(); i > 0u; --i) {
- uint32_t tmp = CountLeadingZeros_64(pVal[i-1]);
- Count += tmp;
- if (tmp != APINT_BITS_PER_WORD)
- if (i == getNumWords())
- Count -= (APINT_BITS_PER_WORD - whichBit(BitWidth));
- break;
+ if (isSingleWord())
+ Count = CountLeadingZeros_64(VAL);
+ else {
+ for (uint32_t i = getNumWords(); i > 0u; --i) {
+ if (pVal[i-1] == 0)
+ Count += APINT_BITS_PER_WORD;
+ else {
+ Count += CountLeadingZeros_64(pVal[i-1]);
+ break;
+ }
+ }
}
- return Count;
+ return Count - (APINT_BITS_PER_WORD - (BitWidth % APINT_BITS_PER_WORD));
}
/// countTrailingZeros - This function is a APInt version corresponding to
@@ -1513,7 +1515,7 @@
result = "-";
insert_at = 1;
}
- if (tmp == 0)
+ if (tmp == APInt(tmp.getBitWidth(), 0))
result = "0";
else while (tmp.ne(zero)) {
APInt APdigit(1,0);
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