Re: refs on basic block cloning

danhicks@aol.com (DanHicks)
Sat, 19 Nov 1994 02:15:19 GMT

          From comp.compilers

Related articles
refs on basic block cloning gerlek@dat.cse.ogi.edu (1994-11-16)
Re: refs on basic block cloning danhicks@aol.com (1994-11-19)
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Newsgroups: comp.compilers
From: danhicks@aol.com (DanHicks)
Keywords: optimize
Organization: Compilers Central
References: 94-11-117
Date: Sat, 19 Nov 1994 02:15:19 GMT

gerlek@dat.cse.ogi.edu (Michael Gerlek) writes:
>>>We're looking at optimizations which can benefit from, or may be
enabled by, cloning basic blocks; I'd appreciate any references anyone
knows has on this subject.<<<


The most profitable basic block manipulation you can do doesn't involve
cloning at all, but merely the insertion of an empty basic block on any
arc that flows from a block with multiple successors to a block with
multiple predecessors. This greatly "opens up" optimizations such as
Morel-Renvois, and it also makes MR converge more quickly and reliably.
--


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