diff options
| author | Zhou Sheng <zhousheng00@gmail.com> | 2007-03-13 06:40:59 +0000 |
|---|---|---|
| committer | Zhou Sheng <zhousheng00@gmail.com> | 2007-03-13 06:40:59 +0000 |
| commit | b277b16593d892421f1bda0e76ada00ac67c539b (patch) | |
| tree | 73b2aa10e5f8242d2bce118b22fb12f9bea44267 /lib/Transforms/Scalar/InstructionCombining.cpp | |
| parent | b991dfeae75fba839150a21272a2aa875ec3945f (diff) | |
For expression like
"APInt::getAllOnesValue(ShiftAmt).zextOrCopy(BitWidth)",
to handle ShiftAmt == BitWidth situation, use zextOrCopy() instead of
zext().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35080 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/InstructionCombining.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 5dbc5240e8..bd88fccc22 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -1995,7 +1995,7 @@ bool InstCombiner::SimplifyDemandedBits(Value *V, APInt DemandedMask, RHSKnownZero <<= ShiftAmt; RHSKnownOne <<= ShiftAmt; // low bits known zero. - RHSKnownZero |= APInt::getAllOnesValue(ShiftAmt).zext(BitWidth); + RHSKnownZero |= APInt::getAllOnesValue(ShiftAmt).zextOrCopy(BitWidth); } break; case Instruction::LShr: @@ -2012,7 +2012,7 @@ bool InstCombiner::SimplifyDemandedBits(Value *V, APInt DemandedMask, assert((RHSKnownZero & RHSKnownOne) == 0 && "Bits known to be one AND zero?"); // Compute the new bits that are at the top now. - APInt HighBits(APInt::getAllOnesValue(ShiftAmt).zext(BitWidth).shl( + APInt HighBits(APInt::getAllOnesValue(ShiftAmt).zextOrCopy(BitWidth).shl( BitWidth - ShiftAmt)); RHSKnownZero &= TypeMask; RHSKnownOne &= TypeMask; @@ -2046,7 +2046,7 @@ bool InstCombiner::SimplifyDemandedBits(Value *V, APInt DemandedMask, assert((RHSKnownZero & RHSKnownOne) == 0 && "Bits known to be one AND zero?"); // Compute the new bits that are at the top now. - APInt HighBits(APInt::getAllOnesValue(ShiftAmt).zext(BitWidth).shl( + APInt HighBits(APInt::getAllOnesValue(ShiftAmt).zextOrCopy(BitWidth).shl( BitWidth - ShiftAmt)); RHSKnownZero &= TypeMask; RHSKnownOne &= TypeMask; |