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| author | Derek Schuff <dschuff@google.com> | 2012-10-26 19:52:27 +0000 |
|---|---|---|
| committer | Derek Schuff <dschuff@google.com> | 2012-10-26 19:52:27 +0000 |
| commit | b61054ff8f5568489109a0ccf2799307c3671309 (patch) | |
| tree | ac4574485813a3da8c68f37dfa7d3f73360b344e /include | |
| parent | ecc69a1d99963b2b1bba92bdcefbfa8a8f1c497a (diff) | |
| download | llvm-b61054ff8f5568489109a0ccf2799307c3671309.tar.gz llvm-b61054ff8f5568489109a0ccf2799307c3671309.tar.bz2 llvm-b61054ff8f5568489109a0ccf2799307c3671309.tar.xz | |
Stop APInt::shl from generating llvm.trap
APInt::shl generated llvm.trap to guard against shifts greater than bit-width.
This was already checked with an assert, and there was a special case for
shifts equal to bit-width. Modify this check to catch shifts greater than or
equal to bit-width, so llvm.trap isn't generated.
Patch contributed by JF Bastien
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166803 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/ADT/APInt.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h index 4470534e04..90114e2b84 100644 --- a/include/llvm/ADT/APInt.h +++ b/include/llvm/ADT/APInt.h @@ -760,7 +760,7 @@ public: APInt shl(unsigned shiftAmt) const { assert(shiftAmt <= BitWidth && "Invalid shift amount"); if (isSingleWord()) { - if (shiftAmt == BitWidth) + if (shiftAmt >= BitWidth) return APInt(BitWidth, 0); // avoid undefined shift results return APInt(BitWidth, VAL << shiftAmt); } |