[ObjCARC] Account for catchswitch in bitcast insertion
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).
Differential Revision: https://reviews.llvm.org/D46412
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331548 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed