Use iteration instead of recursion in CFIInserter

Summary: This recursive step can overflow the stack.

Reviewers: djokov, petarj

Subscribers: mcrosier, jlebar, bixia, llvm-commits

Differential Revision: https://reviews.llvm.org/D46671

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332101 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed