[PATCH] D24399: [RS4GC] Avoid usage of unrelocated values while rematerializing geps and casts

[Anna Thomas via llvm-commits]

anna updated this revision to Diff 72041.
anna added a comment.

The semantic change required to remat in presence of phi.
Only replace use in the remat chain, rather than replacing all uses with the live value.
This is rebased over the refactoring NFC change: https://reviews.llvm.org/D24780
Verified IR generated in tests with safepoint-verifier, and running some local tests.


https://reviews.llvm.org/D24399

Files:
  lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
  test/Transforms/RewriteStatepointsForGC/rematerialize-derived-pointers.ll

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