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Chris Lattner c37a2f13c4 Teach the code generator that rlwimi is commutable if the rotate amount
is zero.  This lets the register allocator elide some copies in some cases.

This implements CodeGen/PowerPC/rlwimi-commute.ll

llvm-svn: 23292
2005-09-09 18:17:41 +00:00
llvm Teach the code generator that rlwimi is commutable if the rotate amount 2005-09-09 18:17:41 +00:00