[GuardWidening] Ignore guards with trivial conditions
Guard widening should not spend efforts on dealing with guards with trivial true/false conditions.
Such guards can easily be eliminated by any further cleanup pass like instcombine. However we
should not unconditionally delete them because it may be profitable to widen other conditions
into such guards.
Differential Revision: https://reviews.llvm.org/D50247
Reviewed By: fedor.sergeev
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340381 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed