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[Bug tree-optimization/15784] fold misses binary optimization
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 4 Jul 2004 08:01:17 -0000
- Subject: [Bug tree-optimization/15784] fold misses binary optimization
- References: <20040602204532.15784.pinskia@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-07-04 08:01 -------
oh, here is why the last two happen on PowerPC and not on i?86, there is an abs pattern for POWER so
we (rs6000) have to a split for the abs so the large number of optimizations can happen before we get
to the point which we split the insn. On i686, it is split/expanded right during expand instead of
waiting until after reload which is what is done on PowerPC.
Also I got all of these by looking into the simplify-rtx.c file so this should be nothing different from
there.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784