[LICM] Report failing to hoist conditionally-executed loads

These are interesting again because the user may not be aware that this
is a common reason preventing LICM.

A const is removed from an instruction pointer declaration in order to
pass it to ORE.

Differential Revision: https://reviews.llvm.org/D27940

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291649 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed