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Commit 626656a5 authored by Chris Lattner's avatar Chris Lattner
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reapply the patch reverted in r116033: 

"Reimplement (part of) the or -> add optimization.  Matching 'or' into 'add'"

With a critical fix: the add pseudos clobber EFLAGS.

llvm-svn: 116039
parent 00ee155b
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