[PATCH] D46412: [ObjCARC] Account for catchswitch in bitcast insertion

[Shoaib Meenai via Phabricator via llvm-commits]

smeenai created this revision.
smeenai added reviewers: ahatanak, rjmccall.

A catchswitch is both a pad and a terminator, meaning it must be the
only non-phi instruction in its basic block. When we're inserting a
bitcast in the incoming basic block for a phi, if that incoming block is
a catchswitch, we should go up the dominator tree to find a valid
insertion point rather than attempting to insert before the catchswitch
(which would result in invalid IR).


Repository:
  rL LLVM

https://reviews.llvm.org/D46412

Files:
  lib/Transforms/ObjCARC/ObjCARCContract.cpp
  test/Transforms/ObjCARC/contract-catchswitch.ll

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