[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #12 from rguenth at gcc dot gnu dot org 2006-07-12 09:26 --- Fixed. -- rguenth at gcc dot gnu dot org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution||FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #11 from rguenth at gcc dot gnu dot org 2006-07-12 09:25 --- Subject: Bug 28187 Author: rguenth Date: Wed Jul 12 09:25:40 2006 New Revision: 115366 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=115366 Log: 2006-07-12 Richard Guenther <[EMAIL PROTECTED]> PR tree-optimization/28187 * tree-vrp.c (vrp_operand_equal_p): New function. (vrp_bitmap_equal_p): Likewise. (update_value_range): Use them to compare old and new max and min values. * gcc.dg/pr28187.c: New testcase. Added: branches/gcc-4_1-branch/gcc/testsuite/gcc.dg/pr28187.c Modified: branches/gcc-4_1-branch/gcc/ChangeLog branches/gcc-4_1-branch/gcc/testsuite/ChangeLog branches/gcc-4_1-branch/gcc/tree-vrp.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #10 from rguenth at gcc dot gnu dot org 2006-07-07 12:34 --- Fixed on the mainline. pinskia, can you verify that as of comment #2 with the reduced and/or the original testcase? Thanks. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #9 from rguenth at gcc dot gnu dot org 2006-07-07 12:32 --- Subject: Bug 28187 Author: rguenth Date: Fri Jul 7 12:31:29 2006 New Revision: 115255 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=115255 Log: 2006-07-07 Richard Guenther <[EMAIL PROTECTED]> PR tree-optimization/28187 * tree-vrp.c (vrp_operand_equal_p): New function. (vrp_bitmap_equal_p): Likewise. (update_value_range): Use them to compare old and new max and min values. * gcc.dg/pr28187.c: New testcase. Added: trunk/gcc/testsuite/gcc.dg/pr28187.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-vrp.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #8 from patchapp at dberlin dot org 2006-07-06 06:45 --- Subject: Bug number PR28187 A patch for this bug has been added to the patch tracker. The mailing list url for the patch is http://gcc.gnu.org/ml/gcc-patches/2006-07/msg00195.html -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #7 from rguenth at gcc dot gnu dot org 2006-07-05 16:09 ---
VRP relies on pointer equivalence in update_value_range, but we get
(gdb) call debug_generic_expr (var)
windowD.1282_5
(gdb) print *old_vr
$11 = {type = VR_RANGE, min = 0xb7ce93c0, max = 0xb7cf0678, equiv = 0x88c69a0}
(gdb) print *new_vr
$12 = {type = VR_RANGE, min = 0xb7ce93c0, max = 0xb7cf072c, equiv = 0x88c6cec}
(gdb) call debug_generic_expr (old_vr->max)
lastD.1278_7 + -1
(gdb) call debug_generic_expr (new_vr->max)
lastD.1278_7 + -1
so, the fix is to use operand_equal_p here.
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
Last reconfirmed|2006-07-05 15:06:20 |2006-07-05 16:09:34
date||
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #6 from rguenth at gcc dot gnu dot org 2006-07-05 15:20 ---
Slightly more reduced (for 4.1.2 on i686, trunk doesn't fail here):
extern void bar(int);
void checkgroups(int last, int verbose)
{
int window = 0;
int outstanding = 0;
while (window < last || outstanding) {
while (outstanding < 47 && window < last) {
if (window < last) {
outstanding++;
if (verbose)
bar(window);
bar(window++);
}
}
if (outstanding > 0)
bar(0);
}
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #5 from rguenth at gcc dot gnu dot org 2006-07-05 15:12 --- Visiting statement: window_6 = ASSERT_EXPR ; ) (res = scev_not_known)) Found new range for window_6: [-INF, last_7 + -1] Simulating statement (from ssa_edges): last_50 = ASSERT_EXPR ; Visiting statement: last_50 = ASSERT_EXPR ; (res = last_7)) Found new range for last_50: [window_6 + 1, +INF] and over and over and over. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #4 from rguenth at gcc dot gnu dot org 2006-07-05 15:06 ---
Reduced testcase, -O -ftree-vrp -fwrapv
extern int foo(const char *);
extern int verbose;
struct newsgroup {
char* name;
};
extern struct newsgroup** stufftoget;
extern char *l;
void checkgroups(int last)
{
int window = 0;
int outstanding = 0;
while (window < last || outstanding) {
while (outstanding < 47 && window < last) {
if (window < last) {
outstanding++;
if (verbose > 1)
foo(stufftoget[window]->name);
foo(stufftoget[window++]->name);
}
}
if (outstanding > 0) {
if (foo(l) < 5 );
}
}
}
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|-00-00 00:00:00 |2006-07-05 15:06:20
date||
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #3 from rguenth at gcc dot gnu dot org 2006-07-05 13:48 --- I can reproduce it on the 4.1 branch on i686, but not on trunk. Very slowly eating all of memory. Reducing. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
[Bug tree-optimization/28187] [4.1/4.2 Regression] '-O2 -fwrapv' exhausts memory.
--- Comment #2 from pinskia at gcc dot gnu dot org 2006-06-28 21:14 --- I can reproduce this on the mainline with a cross to powerpc64-linux-gnu with "-m32 -O2 -fwrapv". -- pinskia at gcc dot gnu dot org changed: What|Removed |Added CC||pinskia at gcc dot gnu dot ||org Component|other |tree-optimization Keywords||memory-hog Known to fail||4.1.2 4.2.0 Known to work||4.0.1 Summary|'-O2 -fwrapv' exhausts |[4.1/4.2 Regression] '-O2 - |memory. |fwrapv' exhausts memory. Target Milestone|--- |4.1.2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28187
