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[Bug rtl-optimization/34012] [4.3 Regression] Pessimization caused by fwprop
- From: "bonzini at gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Nov 2007 11:04:25 -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 #3 from bonzini at gnu dot org 2007-11-07 11:04 -------
Created an attachment (id=14495)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14495&action=view)
patch that fixes the bug
I'm not sure about the correctness of the i386.c hunk. The problem is that a
cost of 0 is mapped by insn_rtx_cost to COSTS_N_INSNS(1) == 4.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34012