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From: "hjl dot tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/35418] New: [4.4 Regression]: Revision 132592 miscompiles 172.mgrid
Date: Sat, 01 Mar 2008 22:12:00 -0000 [thread overview]
Message-ID: <bug-35418-682@http.gcc.gnu.org/bugzilla/> (raw)
On Linux/Intel64, gcc 4.4 revision 132592 miscompiles 172.mgrid in SPEC CPU 2K
with -O2 -ffast-math. This part of change:
Index: gcc/fortran/trans-array.c
===================================================================
--- gcc/fortran/trans-array.c (revision 132591)
+++ gcc/fortran/trans-array.c (revision 132592)
@@ -3937,10 +3949,10 @@ gfc_trans_array_bounds (tree type, gfc_s
/* Make sure that negative size arrays are translated
to being zero size. */
- tmp = build2 (GE_EXPR, boolean_type_node,
- stride, gfc_index_zero_node);
- tmp = build3 (COND_EXPR, gfc_array_index_type, tmp,
- stride, gfc_index_zero_node);
+ tmp = fold_build2 (GE_EXPR, boolean_type_node,
+ stride, gfc_index_zero_node);
+ tmp = fold_build3 (COND_EXPR, gfc_array_index_type, tmp,
+ stride, gfc_index_zero_node);
gfc_add_modify_expr (pblock, stride, tmp);
}
miscompiles RESID, which has nested loops on 3-d arrays. Does it ring a bell?
--
Summary: [4.4 Regression]: Revision 132592 miscompiles 172.mgrid
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hjl dot tools at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35418
next reply other threads:[~2008-03-01 22:12 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-01 22:12 hjl dot tools at gmail dot com [this message]
2008-03-01 22:51 ` [Bug fortran/35418] " hjl dot tools at gmail dot com
2008-03-01 23:00 ` kargl at gcc dot gnu dot org
2008-03-01 23:16 ` tobi at gcc dot gnu dot org
2008-03-02 1:12 ` hjl dot tools at gmail dot com
2008-03-02 1:33 ` kargl at gcc dot gnu dot org
2008-03-02 10:32 ` rguenth at gcc dot gnu dot org
2008-03-02 11:01 ` rguenth at gcc dot gnu dot org
2008-03-05 21:53 ` fxcoudert at gcc dot gnu dot org
2008-03-06 22:03 ` hjl dot tools at gmail dot com
2008-08-22 15:03 ` rguenth at gcc dot gnu dot org
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