Chandler Carruth 4e8a4638e9 [x86] Refactor the bit shift code the same as I just did the byte shift
code.

While this didn't have the miscompile (it used MatchLeft consistently)
it missed some cases where it could use right shifts. I've added a test
case Craig Topper came up with to exercise the right shift matching.

This code is really identical between the two. I'm going to merge them
next so that we don't keep two copies of all of this logic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229655 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-18 09:19:58 +00:00
..
2015-02-18 08:09:28 +00:00
2015-02-18 09:11:50 +00:00