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[ValueTracking] computeKnownBitsFromShiftOperator - move shift amount analysis…

Authored by RKSimon on Nov 19 2020, 5:49 AM.

Description

[ValueTracking] computeKnownBitsFromShiftOperator - move shift amount analysis to top of the function. NFCI.

These are all lightweight to compute and helps avoid issues with Known being used to hold both the shift amount and then the shifted result.

Minor cleanup for D90479.

Details

Committed
RKSimonNov 19 2020, 5:50 AM
Parents
rG006b3bdeddb0: [ARM] Deliberately prevent inline asm in low overhead loops. NFC
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