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* [Bug tree-optimization/31996] New: can't determine dependence between p->a[x+i] and *((int *)p + x + i + 8) @ 2007-05-19 0:41 pinskia at gcc dot gnu dot org 2007-05-19 0:41 ` [Bug tree-optimization/31996] " pinskia at gcc dot gnu dot org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2007-05-19 0:41 UTC (permalink / raw) To: gcc-bugs Just like PR 31995, this was found on the pointer plus branch after fixing forwprop (note fowrwprop could be improved even more but that is a different story and then we just get back to PR 31995 really), This testcase is really vect-103 but modified to confuse data-ref: /* { dg-require-effective-target vect_int } */ #include <stdlib.h> #include <stdarg.h> #include "tree-vect.h" #define N 9 struct extraction { int a[N]; int b[N]; }; static int a[N] = {1,2,3,4,5,6,7,8,9}; static int b[N] = {17,24,7,0,2,3,4,31,82}; static int c[N] = {9,17,24,7,0,2,3,4,31}; int main1 (int x, int y) { int i; struct extraction *p; p = (struct extraction *) malloc (sizeof (struct extraction)); for (i = 0; i < N; i++) { p->a[i] = a[i]; p->b[i] = b[i]; if (x == 135) abort (); /* to avoid vectorization */ } /* Vectorizable: distance > VF. */ for (i = 0; i < N; i++) { p->a[x + i] = *((int *)p + x + i + 8); } /* check results: */ for (i = 0; i < N; i++) { if (p->a[i] != c[i]) abort(); } return 0; } int main (void) { check_vect (); return main1 (0, N); } /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */ /* { dg-final { scan-tree-dump-times "dependence distance modulo vf == 0" 1 "vect" } } */ /* { dg-final { cleanup-tree-dump "vect" } } */ -- Summary: can't determine dependence between p->a[x+i] and *((int *)p + x + i + 8) Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31996 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/31996] can't determine dependence between p->a[x+i] and *((int *)p + x + i + 8) 2007-05-19 0:41 [Bug tree-optimization/31996] New: can't determine dependence between p->a[x+i] and *((int *)p + x + i + 8) pinskia at gcc dot gnu dot org @ 2007-05-19 0:41 ` pinskia at gcc dot gnu dot org 2007-07-09 9:18 ` pinskia at gcc dot gnu dot org 2007-07-18 6:03 ` pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2007-05-19 0:41 UTC (permalink / raw) To: gcc-bugs -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31996 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/31996] can't determine dependence between p->a[x+i] and *((int *)p + x + i + 8) 2007-05-19 0:41 [Bug tree-optimization/31996] New: can't determine dependence between p->a[x+i] and *((int *)p + x + i + 8) pinskia at gcc dot gnu dot org 2007-05-19 0:41 ` [Bug tree-optimization/31996] " pinskia at gcc dot gnu dot org @ 2007-07-09 9:18 ` pinskia at gcc dot gnu dot org 2007-07-18 6:03 ` pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2007-07-09 9:18 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from pinskia at gcc dot gnu dot org 2007-07-09 09:18 ------- Confirmed, this is now on the trunk. http://gcc.gnu.org/ml/gcc-testresults/2007-07/msg00395.html FAIL: gcc.dg/vect/vect-103.c scan-tree-dump-times vectorized 1 loops 1 FAIL: gcc.dg/vect/vect-103.c scan-tree-dump-times dependence distance modulo vf == 0 1 -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2007-07-09 09:18:01 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31996 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/31996] can't determine dependence between p->a[x+i] and *((int *)p + x + i + 8) 2007-05-19 0:41 [Bug tree-optimization/31996] New: can't determine dependence between p->a[x+i] and *((int *)p + x + i + 8) pinskia at gcc dot gnu dot org 2007-05-19 0:41 ` [Bug tree-optimization/31996] " pinskia at gcc dot gnu dot org 2007-07-09 9:18 ` pinskia at gcc dot gnu dot org @ 2007-07-18 6:03 ` pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2007-07-18 6:03 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from pinskia at gcc dot gnu dot org 2007-07-18 06:02 ------- The testcase was fixed after: 2007-07-09 Richard Guenther <rguenther@suse.de> PR middle-end/32698 * fold-const.c (fold_plusminus_mult_expr): Move constant arguments second to allow decomposing. -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31996 ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-07-18 6:03 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2007-05-19 0:41 [Bug tree-optimization/31996] New: can't determine dependence between p->a[x+i] and *((int *)p + x + i + 8) pinskia at gcc dot gnu dot org 2007-05-19 0:41 ` [Bug tree-optimization/31996] " pinskia at gcc dot gnu dot org 2007-07-09 9:18 ` pinskia at gcc dot gnu dot org 2007-07-18 6:03 ` pinskia at gcc dot gnu dot org
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