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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-10-07 23:40:49 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-10-07 23:40:49 +0000 |
| commit | 9eb6b4d91b83448ec818089754c74bbdcf7dfd7a (patch) | |
| tree | bc23b23e593554a3b01ef19bded7a7f71ff22db6 /lib/Support/APInt.cpp | |
| parent | d2fdb4a28560688be5cbc5b2b0c305ec7207cbd0 (diff) | |
| download | llvm-9eb6b4d91b83448ec818089754c74bbdcf7dfd7a.tar.gz llvm-9eb6b4d91b83448ec818089754c74bbdcf7dfd7a.tar.bz2 llvm-9eb6b4d91b83448ec818089754c74bbdcf7dfd7a.tar.xz | |
Fix APInt::operator*= so that it computes the correct result for large integers where there is unsigned overflow. Fix APFloat::toString so that it doesn't depend on the incorrect behavior in common cases (and computes the correct result in some rare cases). Fixes PR11086.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141441 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support/APInt.cpp')
| -rw-r--r-- | lib/Support/APInt.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp index 6eadaafd5f..3774c5223c 100644 --- a/lib/Support/APInt.cpp +++ b/lib/Support/APInt.cpp @@ -386,6 +386,7 @@ APInt& APInt::operator*=(const APInt& RHS) { clearAllBits(); unsigned wordsToCopy = destWords >= getNumWords() ? getNumWords() : destWords; memcpy(pVal, dest, wordsToCopy * APINT_WORD_SIZE); + clearUnusedBits(); // delete dest array and return delete[] dest; @@ -471,7 +472,7 @@ APInt APInt::operator*(const APInt& RHS) const { return APInt(BitWidth, VAL * RHS.VAL); APInt Result(*this); Result *= RHS; - return Result.clearUnusedBits(); + return Result; } APInt APInt::operator+(const APInt& RHS) const { |