Mingjie Xu 227edfb2f4 [CodeGenPrepare][NFC] Reland: Update the dominator tree instead of rebuilding it (#179040) ...

The original differential revision is https://reviews.llvm.org/D153638

Reverted in
f5b5a30858
because of causing a clang crash.

This patch relands it with the crash fixed. Call `DTU->flush()` in each
iteration of `while (MadeChange)`
loop, flush all awaiting BasicBlocks deletion, and prevent iterator
invalidation.

2026-03-31 09:01:11 +08:00

19 KiB

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