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[LV] Always record recipe for optimized cast.

Authored by fhahn on Nov 29 2021, 1:54 PM.



Currently the recipe for a cast instruction is not recorded, if the
using first-order recurrence comes *after* the optimized phi.

This patch adjusts the code to always record the recipe for optimized
cast instructions. This requires a bit of extra logic to check whether
recording was already requested.

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Event Timeline

fhahn created this revision.Nov 29 2021, 1:54 PM
fhahn requested review of this revision.Nov 29 2021, 1:54 PM
Herald added a project: Restricted Project. · View Herald TranscriptNov 29 2021, 1:54 PM
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fhahn abandoned this revision.Dec 5 2021, 5:04 AM

Removing of dead casts can be done directly in VPlan, so there's no need to record extra recipes: D115112