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[Bug middle-end/18628] [4.0 regression] miscompilation of switch statement in loop
- 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: 23 Nov 2004 17:22:06 -0000
- Subject: [Bug middle-end/18628] [4.0 regression] miscompilation of switch statement in loop
- References: <20041123151338.18628.micis@gmx.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-11-23 17:22 -------
It started to ICE on the tree-ssa:
: Search converges between 2003-08-31-ssa (#74) and 2003-09-01-ssa (#75).
But it stopped:
: Search converges between 2003-09-01-ssa (#75) and 2003-09-03-ssa (#76).
At which point we started to produce wrong code.
This looks like a laten bug in the rtl optimizaters.
Note with -O2 -fno-gcse I cannot reproduce this.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18628