tree 5a83567df2697b3f4912e2ab15615bfb6d59491f
parent db49795f18cead580ed698b525802b0eddee576e
author Michael Kruse <llvm-project@meinersbur.de> 1632705026 -0500
committer Copybara-Service <copybara-worker@google.com> 1632786976 -0700

[Polly] Reject regions entered by an indirectbr/callbr.

SplitBlockPredecessors is unable to insert an additional BasicBlock
between an indirectbr/callbr terminator and the successor blocks.
This is needed by Polly to normalize the control flow before emitting
its optimzed code.

This patches rejects regions entered by an indirectbr/callbr to not fail
later at code generation.

This fixes llvm.org/PR51964

Recommit with "REQUIRES: asserts" in test that uses statistics.

GitOrigin-RevId: 027c036663322d753e2dce6ad8d568d4e046b267