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Commit 1c6c3483 authored by Dan Gohman's avatar Dan Gohman
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Fix reassociate to use a worklist instead of recursing when new 

reassociation opportunities are exposed. This fixes a bug where
the nested reassociation expects to be the IR to be consistent,
but it isn't, because the outer reassociation has disconnected
some of the operands.  rdar://9167457

llvm-svn: 129324
parent 0a689596
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