Tim Northover 464549ab4d ARM: fix handling of SUB immediates in peephole opt.
We were negating an immediate that was going to be used in a SUBri form
unnecessarily. Since ADD/SUB are very similar we *can* do that, but we have to
change the SUB to an ADD at the same time. This also applies to ADD, and allows
us to handle a slightly larger range of immediates for those two operations.

rdar://25992245

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268276 91177308-0d34-0410-b5e6-96231b3b80d8
2016-05-02 18:30:08 +00:00
..