[PATCH] D59535: [SelectionDAG] Compute known bits of CopyFromReg

[Guozhi Wei via Phabricator via llvm-commits]

Carrot added a comment.

Just FYI.

With this patch, llvm generates wrong instructions for one of our internal applications. And it causes debug version compiler crash in X86DAGToDAGISel::getAddressOperands, when it computes load address of jump table, it got an AM with non-zero disp, it is unexpected by getAddressOperands. I'm not sure if it is the same problem as described in https://reviews.llvm.org/rL358113, or a separate issue.

Unfortunately I don't have a small test case to reproduce it, the original code is large and difficult to be simplified.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D59535/new/

https://reviews.llvm.org/D59535