Philip Reames 00a877f96a [DSE] Cache liveOnEntry as clobbering access
This builds on @fhahn's D112313, and caches the liveOnEntry node as a optimized access. D112313 tied to only cache a known clobber. This change adds caching the fact that no clobber exists. It still does not cache may-clobber results.

Differential Revision: https://reviews.llvm.org/D120842
2022-03-03 11:36:21 -08:00
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2022-03-01 18:01:54 +01:00