Tim Northover 9f7d13868a ARM: fix peephole optimisation of TST
We were trying to look through COPY instructions, but only to the next
instruction in a BB and incorrectly anyway. The cases where that would actually
be a good idea are rare enough (and not even tested!) that it's not worth
trying to get right.

rdar://20721342

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236050 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-28 22:03:55 +00:00
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