From 929a127932b4ad39551ea844880217a5f12e2034 Mon Sep 17 00:00:00 2001 From: Simon Pilgrim Date: Tue, 10 Nov 2020 16:33:41 +0000 Subject: [PATCH] [ValueTracking] computeKnownBitsFromShiftOperator - consistently use Known2 for the shifted value. NFCI. Minor cleanup as part of getting D90479 moving again. --- llvm/lib/Analysis/ValueTracking.cpp | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index db591ce67709..ce9174bbcdcf 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.