[PATCH] D31576: MemorySSA: Remove MemorySSA walker caching.
Daniel Berlin via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Sun Apr 2 01:09:37 PDT 2017
dberlin created this revision.
Herald added a subscriber: Prazek.
Remove all the caching the clobber walker does, and that the
caching walker does. With the patch to enable storing clobbering
access results for stores, i can find no improvement with the cache
turned on (and a number of degradations, both time and memory, from
the cost of caching. For a large program i have, we do millions of
lookups and inserts with zero hits).
I haven't tried to rename or simplify the walker otherwise yet.
(Appreciate some perf testing on this past my own testing)
https://reviews.llvm.org/D31576
Files:
lib/Transforms/Utils/MemorySSA.cpp
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