+2010-01-20 Alexandre Oliva <aoliva@redhat.com>
+
+ PR debug/42715
+ * var-tracking.c (use_type): Choose MO_VAL_SET for REGs set
+ without a cselib val.
+ (count_uses): Accept MO_VAL_SET with no val on stores.
+ (add_stores): Likewise.
+
2010-01-20 Jakub Jelinek <jakub@redhat.com>
* var-tracking.c (check_value_val): Add a compile time assertion.
--- /dev/null
+/* { dg-do compile { target fpic } } */
+/* { dg-options "-fPIC -g -O2 -w" } */
+/* var-tracking failed to clobber the reg holding v at the asm insn,
+ so v ended up bound to an intermediate PIC expression. */
+
+struct A { unsigned a1; char a2[15]; };
+struct B { long b1; unsigned char b2; long b3; };
+struct C { void *c1; unsigned c2; unsigned c3; };
+
+static struct A v1;
+struct A *const v2 = &v1;
+
+static inline
+int foo (void)
+{
+ int *v;
+ __asm__ __volatile__ ("" : "=r" (v));
+ return v[1];
+}
+
+static void
+bar (struct C *x)
+{
+ if (x->c2 == x->c3 && x->c1)
+ f1 (foo (), x->c1, x->c3 * sizeof (x->c1[0]));
+}
+
+void
+baz (struct B *y)
+{
+ int i;
+ const char *j;
+ char *k;
+ char x[64];
+ for (i = 0; i < sizeof (struct B); i++, y)
+ {
+ switch (y->b2)
+ {
+ case 0x20:
+ if (__builtin_strchr (j, '='))
+ continue;
+ }
+ switch (y->b2)
+ {
+ case 0x80:
+ bar (&x);
+ f2 (y->b3);
+ case 0x2e:
+ case 0x4e:
+ break;
+ default:
+ if (v2->a1)
+ f2 (y->b2);
+ }
+ k[0] = '\0';
+ if (v2->a1)
+ f2 (y->b1);
+ }
+}
use_type (rtx loc, struct count_use_info *cui, enum machine_mode *modep)
{
tree expr;
- cselib_val *val;
if (cui && cui->sets)
{
return MO_CLOBBER;
}
- if ((REG_P (loc) || MEM_P (loc))
- && (val = find_use_val (loc, GET_MODE (loc), cui)))
+ if (REG_P (loc) || MEM_P (loc))
{
if (modep)
*modep = GET_MODE (loc);
if (cui->store_p)
{
if (REG_P (loc)
- || cselib_lookup (XEXP (loc, 0), GET_MODE (loc), 0))
+ || (find_use_val (loc, GET_MODE (loc), cui)
+ && cselib_lookup (XEXP (loc, 0), GET_MODE (loc), 0)))
return MO_VAL_SET;
}
- else if (!cselib_preserved_value_p (val))
- return MO_VAL_USE;
+ else
+ {
+ cselib_val *val = find_use_val (loc, GET_MODE (loc), cui);
+
+ if (val && !cselib_preserved_value_p (val))
+ return MO_VAL_USE;
+ }
}
}
cselib_preserve_value (val);
}
else
- gcc_assert (mopt == MO_VAL_LOC);
+ gcc_assert (mopt == MO_VAL_LOC
+ || (mopt == MO_VAL_SET && cui->store_p));
break;
v = find_use_val (oloc, mode, cui);
+ if (!v)
+ goto log_and_return;
+
resolve = preserve = !cselib_preserved_value_p (v);
nloc = replace_expr_with_values (oloc);