[IndVarSimplify] Don't insert after a catchswitch

Widening a PHI requires us to insert a trunc.
The logical place for this trunc is in the same BB as the PHI.
This is not possible if the BB is terminated by a catchswitch.

This fixes PR27133.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264926 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed