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[Bug middle-end/16969] New: RTX_UNCHANGING_P related miscompilation
- From: "jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Aug 2004 15:44:31 -0000
- Subject: [Bug middle-end/16969] New: RTX_UNCHANGING_P related miscompilation
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
On ppc (and ppc64 -m32) following testcase is miscompiled with -O2
in at least 3.4.2 20040810 (prerelease) and 3.4.1 20040714 (Red Hat 3.4.1-7).
In RTL dumps the problem is immediately obvious, t initialization is done with
MEM/s (note missing /u), while later on reads from it are MEM/s/u.
--
Summary: RTX_UNCHANGING_P related miscompilation
Product: gcc
Version: 3.4.2
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jakub at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: powerpc-redhat-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16969