This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: Proposed major change to combine
- To: meissner at cygnus dot com (Michael Meissner)
- Subject: Re: Proposed major change to combine
- From: Joern Rennecke <amylaar at cambridge dot redhat dot com>
- Date: Fri, 9 Mar 2001 02:45:50 +0000 (GMT)
- Cc: tege at swox dot com (Torbjorn Granlund),kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner), gcc at gcc dot gnu dot org
> But you can already do that with define_split. For example consider splitting
But that rquires that you drag around another insn pattern that has extra
complexity, i.e. expands to more than one insn.
First we should stop combines greed to combine insns even when that results
in a more expensive insn that the sum of the cost of the two combined insns.