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* [Bug tree-optimization/24117] New: [4.1 Regression] DCE kills call-clobbered part of structure
@ 2005-09-29 10:03 rguenth at gcc dot gnu dot org
2005-09-29 13:29 ` [Bug tree-optimization/24117] " pinskia at gcc dot gnu dot org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2005-09-29 10:03 UTC (permalink / raw)
To: gcc-bugs
For
typedef struct {
int x;
int z;
} Foo_t;
char *xm;
void bar(void);
void foo(void)
{
Foo_t x;
x.x = 1;
x.z = 2;
xm = (char *)&x;
bar();
}
where we decompose the struct for aliasing, the store to x.z is killed,
which is wrong.
Testcase is reduced from fortranio_2.f90 test. The fortran frontend
does such things for IO. The fortranio_2.f90 failure get's triggered
by the array-aliasing patches as it's sturcture contains an array and
only with the patches we start decomposing the structure at all.
--
Summary: [4.1 Regression] DCE kills call-clobbered part of
structure
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Keywords: wrong-code, alias
Severity: normal
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rguenth at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24117
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug tree-optimization/24117] [4.1 Regression] DCE kills call-clobbered part of structure 2005-09-29 10:03 [Bug tree-optimization/24117] New: [4.1 Regression] DCE kills call-clobbered part of structure rguenth at gcc dot gnu dot org @ 2005-09-29 13:29 ` pinskia at gcc dot gnu dot org 2005-09-29 19:38 ` [Bug tree-optimization/24117] [4.1 Regression] struct is not marked fully as call clobbered cvs-commit at gcc dot gnu dot org 2005-09-29 19:39 ` dberlin at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-09-29 13:29 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-29 13:29 ------- Confirmed. -- What |Removed |Added ---------------------------------------------------------------------------- CC| |dberlin at gcc dot gnu dot | |org, pinskia at gcc dot gnu | |dot org Status|UNCONFIRMED |NEW Ever Confirmed| |1 Last reconfirmed|0000-00-00 00:00:00 |2005-09-29 13:29:05 date| | Target Milestone|--- |4.1.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24117 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/24117] [4.1 Regression] struct is not marked fully as call clobbered 2005-09-29 10:03 [Bug tree-optimization/24117] New: [4.1 Regression] DCE kills call-clobbered part of structure rguenth at gcc dot gnu dot org 2005-09-29 13:29 ` [Bug tree-optimization/24117] " pinskia at gcc dot gnu dot org @ 2005-09-29 19:38 ` cvs-commit at gcc dot gnu dot org 2005-09-29 19:39 ` dberlin at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: cvs-commit at gcc dot gnu dot org @ 2005-09-29 19:38 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-09-29 19:38 ------- Subject: Bug 24117 CVSROOT: /cvs/gcc Module name: gcc Changes by: dberlin@gcc.gnu.org 2005-09-29 19:38:01 Modified files: gcc : ChangeLog tree-ssa-structalias.c Added files: gcc/testsuite/gcc.dg/tree-ssa: pr24117.c Log message: 2005-09-29 Daniel Berlin <dberlin@dberlin.org> Fix PR tree-optimization/24117 * tree-ssa-structalias.c (find_func_aliases): Strip nops before considering whether to use anyoffset. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.10049&r2=2.10050 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-structalias.c.diff?cvsroot=gcc&r1=2.29&r2=2.30 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr24117.c.diff?cvsroot=gcc&r1=NONE&r2=1.1 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24117 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/24117] [4.1 Regression] struct is not marked fully as call clobbered 2005-09-29 10:03 [Bug tree-optimization/24117] New: [4.1 Regression] DCE kills call-clobbered part of structure rguenth at gcc dot gnu dot org 2005-09-29 13:29 ` [Bug tree-optimization/24117] " pinskia at gcc dot gnu dot org 2005-09-29 19:38 ` [Bug tree-optimization/24117] [4.1 Regression] struct is not marked fully as call clobbered cvs-commit at gcc dot gnu dot org @ 2005-09-29 19:39 ` dberlin at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: dberlin at gcc dot gnu dot org @ 2005-09-29 19:39 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From dberlin at gcc dot gnu dot org 2005-09-29 19:39 ------- Fixed -- What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24117 ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2005-09-29 19:39 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2005-09-29 10:03 [Bug tree-optimization/24117] New: [4.1 Regression] DCE kills call-clobbered part of structure rguenth at gcc dot gnu dot org 2005-09-29 13:29 ` [Bug tree-optimization/24117] " pinskia at gcc dot gnu dot org 2005-09-29 19:38 ` [Bug tree-optimization/24117] [4.1 Regression] struct is not marked fully as call clobbered cvs-commit at gcc dot gnu dot org 2005-09-29 19:39 ` dberlin at gcc dot gnu dot org
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