c3a68c5d63
In the process of rewriting `alloca`s and `phi`s that use them, the SROA pass can try to insert a non-PHI instruction by calling `getFirstInsertionPt()`, which is not possible in a catchswitch BB. This CL makes we bail out on these cases. Reviewed By: dschuff Differential Revision: https://reviews.llvm.org/D117168