Philip Reames 1e86abc914 [RISCVRVVInitUndef] Ignore tied use for partial undef register ...

The purpose of this code is to restrict overlap between source and destination registers. The tied input register is conceptually part of the destination. I can't see any reason why we need to prevent a partial undef tied source here, and skipping it reduces register pressure slightly.

Differential Revision: https://reviews.llvm.org/D156709

2023-08-01 12:16:26 -07:00

9.2 KiB

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