Reduced from 197.parser which failed with -O1: /* { dg-do run } */ /* { dg-options "-O1 --param max-aliased-vops=0" } */
struct T { int a, b; } t; __attribute__((noinline)) struct T *f (struct T *p) { struct T *q = __builtin_malloc (sizeof (struct T)); *q = *p; return q; } int main (void) { struct T *p; t.a = 1; t.b = 2; p = f (&t); t.a = 3; if (p->a != 1) __builtin_abort (); return 0; } -- Summary: [4.3 regression] wrong code with dse and alias partitioning Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: belyshev at depni dot sinp dot msu dot ru http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33560