tree aeb75297d3dd85f0befdb433b15cd64c3d537116
parent f1bd6fa7d2f31f1f89f3a918e8d0f4a67b6a5d47
author Nikita Popov <nikita.ppv@gmail.com> 1637344635 +0100
committer Copybara-Service <copybara-worker@google.com> 1638028640 -0800

[SCEV] Simplify forgetSymbolicName() (NFCI)

With the recently introduced tracking as well as D113349, we can
greatly simplify forgetSymbolicName(). In fact, we can simply
replace it with forgetMemoizedResults().

What forgetSymbolicName() used to do is to walk the IR use-def
chain to find all SCEVs that mention the SymbolicName. However,
thanks to use tracking, we can now determine the relevant SCEVs
in a more direct way. D113349 is needed to also clear out the
actual IR to SCEV mapping in ValueExprMap.

Differential Revision: https://reviews.llvm.org/D114263

GitOrigin-RevId: f492a414bad782ae4202d2af9d3408f8e727599d