Luke Lau bb14eabaca [VPlan] Split out EVL exit cond transform from canonicalizeEVLLoops. NFC (#178181) ...

This is split out from #177114.

In order to make canonicalizeEVLLoops a generic "convert to variable
stepping" transform, move the code that changes the exit condition to a
separate transform since not all variable stepping loops will want to
transform the exit condition. Run it before canonicalizeEVLLoops before
VPEVLBasedIVPHIRecipe is expanded.

Also relax the assertion for VPInstruction::ExplicitVectorLength to just
bail instead, since eventually VPEVLBasedIVPHIRecipe will be used by
other loops that aren't EVL tail folded.

2026-02-02 04:45:43 +00:00

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