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Temporarily reverting r55137. This was causing the bootstrap to go into an

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infinite loop.

llvm-svn: 55149
This commit is contained in:
Bill Wendling 2008-08-21 22:40:10 +00:00
parent 0b0215d531
commit 7840023704
1 changed files with 3 additions and 7 deletions
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10
lib/Analysis/ValueTracking.cpp
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@ -509,13 +509,9 @@ void llvm::ComputeMaskedBits(Value *V, const APInt &Mask,
ComputeMaskedBits(R, Mask2, KnownZero2, KnownOne2, TD, Depth+1);
Mask2 = APInt::getLowBitsSet(BitWidth,
KnownZero2.countTrailingOnes());
// We need to take the minimum number of known bits
APInt KnownZero3(KnownZero), KnownOne3(KnownOne);
KnownOne3.clear();
KnownZero3.clear();
ComputeMaskedBits(L, Mask2, KnownZero3, KnownOne3, TD, Depth+1);
KnownOne2.clear();
KnownZero2.clear();
ComputeMaskedBits(L, Mask2, KnownZero2, KnownOne2, TD, Depth+1);
KnownZero = Mask &
APInt::getLowBitsSet(BitWidth,
KnownZero2.countTrailingOnes());