Jay Foad cdac4492b4 [SplitKit] Cope with no live subranges in defFromParent ...

Following on from D87757 "[SplitKit] Only copy live lanes", it is
possible to split a live range at a point when none of its subranges
are live. This patch handles that case by inserting an implicit def
of the superreg.

Patch by Quentin Colombet!

Differential Revision: https://reviews.llvm.org/D88397

2020-09-30 10:16:25 +01:00

67 KiB

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