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[Bug middle-end/20249] [4.0/4.1 Regression] ICE with -fprofile-arcs on ppc
- From: "rakdver at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 6 Mar 2005 23:06:00 -0000
- Subject: [Bug middle-end/20249] [4.0/4.1 Regression] ICE with -fprofile-arcs on ppc
- References: <20050228133725.20249.marcus@jet.franken.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rakdver at gcc dot gnu dot org 2005-03-06 23:05 -------
This seems to be a cse problem. The code looks like
(set (reg:si 124) (reg:si 5))
...
(set (reg:si 5) (reg:si 124))
...
(set (reg:di 119) (reg:di 5))
...
(set (reg:di 3) (reg:di 119))
cse propagates the value of reg:si 5 to the last insn
(set (reg:di 3) (reg:si 5))
Which is incorrect since the hard reg is accessed in a different
mode.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20249