Owen Anderson 26c5663283 Invert and-of-or into or-of-and when doing so would allow us to clear bits of the and's mask.
This can result in increased opportunities for store narrowing in code generation.  Update a number of
tests for this change.  This fixes <rdar://problem/8285027>.

Additionally, because this inverts the order of ors and ands, some patterns for optimizing or-of-and-of-or
no longer fire in instances where they did originally.  Add a simple transform which recaptures most of these
opportunities: if we have an or-of-constant-or and have failed to fold away the inner or, commute the order 
of the two ors, to give the non-constant or a chance for simplification instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113679 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-11 05:48:06 +00:00
2010-09-11 02:13:39 +00:00
2010-09-07 23:10:21 +00:00
2010-09-11 00:16:46 +00:00
2010-09-11 02:13:39 +00:00
2010-08-15 07:07:12 +00:00
2010-07-27 00:04:55 +00:00

\Low Level Virtual Machine (LLVM)
================================

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