[X86] narrowBitOpRMW/combineTruncate - don't retain pointer info for unknown offset load/stores (#166752)

#166337 replaces large (illegal type) loads/stores with a smaller i32
load/store based off the demanded shifted bits. As these shifts are
non-constant we can't regenerate the PointerInfo data with a fixed
offset, so we need to discard the data entirely.

Fixes #166744 - post-ra has to reconstruct dependencies after the chains
have been stripped and uses pointer info instead - which resulted in
some loads being rescheduled earlier than the dependent store as it was
thought they didn't alias

0 files changed, 0 insertions, 0 deletions