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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/39299] New: wrong PTA for structure copies Date: Wed, 25 Feb 2009 11:11:00 -0000 [thread overview] Message-ID: <bug-39299-10053@http.gcc.gnu.org/bugzilla/> (raw) At -O2 -fno-tree-sra we compute y.p as pointing to nothing. Which causes the abort to trigger on alias-improvements branch. struct X { long l1; struct Y { long l2; int *p; } y; }; int i; int foo (struct X *x) { struct Y y = x->y; *y.p = 0; i = 1; return *y.p; } extern void abort (void); int main() { struct X x; x.y.p = &i; if (foo(&x) != 1) abort (); return 0; } -- Summary: wrong PTA for structure copies Product: gcc Version: 4.4.0 Status: UNCONFIRMED Keywords: wrong-code, alias Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: rguenth at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39299
next reply other threads:[~2009-02-25 11:11 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2009-02-25 11:11 rguenth at gcc dot gnu dot org [this message] 2009-02-25 13:08 ` [Bug tree-optimization/39299] " rguenth at gcc dot gnu dot org 2009-02-26 10:11 ` rguenth at gcc dot gnu dot org 2009-02-26 10:11 ` rguenth at gcc dot gnu dot org 2009-04-03 10:28 ` rguenth at gcc dot gnu dot org 2009-04-03 10:37 ` rguenth at gcc dot gnu dot org
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