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[Bug optimization/11319] [3.3/3.4 regression] loop miscompiled on ppc32
- From: "janis187 at us dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 5 Aug 2003 21:15:11 -0000
- Subject: [Bug optimization/11319] [3.3/3.4 regression] loop miscompiled on ppc32
- References: <20030625132058.11319.marcus@jet.franken.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11319
janis187 at us dot ibm dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rth at redhat dot com
------- Additional Comments From janis187 at us dot ibm dot com 2003-08-05 21:15 -------
The regression in PR 11319 was introduced or exposed by this patch:
2002-02-07 Richard Henderson <rth@redhat.com>
PR optimization/2463
* alias.c (find_base_value): Recall base values for fixed hard regs.
* loop.c (loop_regs_update): Don't use single_set on non-insns.
The regression hunt took place on powerpc-linux using the test case from
the attachment in comment #1 compiled with -O2 and then executed.