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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2020-11-10 16:33:41 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2020-11-10 17:03:17 +0000 |
| commit | 929a127932b4ad39551ea844880217a5f12e2034 (patch) | |
| tree | e7445bbe0f0dddbd7ed61a178b91a5d7fd26100f /llvm/lib/Analysis/ValueTracking.cpp | |
| parent | c7e275388e3fe55163296e587eff1b6325b63da2 (diff) | |
| download | llvm-929a127932b4ad39551ea844880217a5f12e2034.zip llvm-929a127932b4ad39551ea844880217a5f12e2034.tar.gz llvm-929a127932b4ad39551ea844880217a5f12e2034.tar.bz2 | |
[ValueTracking] computeKnownBitsFromShiftOperator - consistently use Known2 for the shifted value. NFCI.
Minor cleanup as part of getting D90479 moving again.
Diffstat (limited to 'llvm/lib/Analysis/ValueTracking.cpp')
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index db591ce..ce9174b 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -995,9 +995,9 @@ static void computeKnownBitsFromShiftOperator( if (Known.isConstant()) { unsigned ShiftAmt = Known.getConstant().getLimitedValue(BitWidth - 1); - computeKnownBits(I->getOperand(0), DemandedElts, Known, Depth + 1, Q); - Known.Zero = KZF(Known.Zero, ShiftAmt); - Known.One = KOF(Known.One, ShiftAmt); + computeKnownBits(I->getOperand(0), DemandedElts, Known2, Depth + 1, Q); + Known.Zero = KZF(Known2.Zero, ShiftAmt); + Known.One = KOF(Known2.One, ShiftAmt); // If the known bits conflict, this must be an overflowing left shift, so // the shift result is poison. We can return anything we want. Choose 0 for // the best folding opportunity. |