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[Bug rtl-optimization/34012] [4.3 Regression] Pessimization caused by fwprop
- From: "paolo dot bonzini at lu dot unisi dot ch" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Nov 2007 13:53:56 -0000
- Subject: [Bug rtl-optimization/34012] [4.3 Regression] Pessimization caused by fwprop
- References: <bug-34012-87@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #5 from paolo dot bonzini at lu dot unisi dot ch 2007-11-07 13:53 -------
Subject: Re: [4.3 Regression] Pessimization caused
by fwprop
> BTW, why don't you use just rtx_cost instead of insn_rtx_cost?
> In each case you have an insn, so you can do single_set on it and run
> rtx_cost (SET_SRC (set), SET) on it directly.
You're right. I was just mimicking combine to see if the problem was
simple to solve or more deeply rooted.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34012