Jakub Kuderski 56b52a207f [Dominators][CodeGen] Add MachinePostDominatorTree verification ...

Summary:
This patch implements Machine PostDominator Tree verification and ensures that the verification doesn't fail the in-tree tests.

MPDT verification can be enabled using `verify-machine-dom-info` -- the same flag used by Machine Dominator Tree verification.

Flipping the flag revealed that MachineSink falsely claimed to preserve CFG and MDT/MPDT. This patch fixes that.

Reviewers: arsenm, hliao, rampitec, vpykhtin, grosser

Reviewed By: hliao

Subscribers: wdng, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D68235

llvm-svn: 373341

2019-10-01 15:23:27 +00:00

45 KiB

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