+2011-10-06 Jakub Jelinek <jakub@redhat.com>
+
+ PR tree-optimization/49279
+ * tree-ssa-structalias.c (find_func_aliases): Don't handle
+ CAST_RESTRICT.
+ * tree-ssa-forwprop.c (forward_propagate_addr_expr_1): Allow
+ restrict propagation.
+ * tree-ssa.c (useless_type_conversion_p): Don't return false
+ if TYPE_RESTRICT differs.
+
2011-10-06 Bernd Schmidt <bernds@codesourcery.com>
* function.c (thread_prologue_and_epilogue_insns): Build a vector
+2011-10-06 Jakub Jelinek <jakub@redhat.com>
+
+ PR tree-optimization/49279
+ * gcc.dg/tree-ssa/restrict-4.c: XFAIL.
+ * gcc.c-torture/execute/pr49279.c: New test.
+
2011-10-06 Bernd Schmidt <bernds@codesourcery.com>
PR target/49049
--- /dev/null
+/* PR tree-optimization/49279 */
+extern void abort (void);
+
+struct S { int a; int *__restrict p; };
+
+__attribute__((noinline, noclone))
+struct S *bar (struct S *p)
+{
+ struct S *r;
+ asm volatile ("" : "=r" (r) : "0" (p) : "memory");
+ return r;
+}
+
+__attribute__((noinline, noclone))
+int
+foo (int *p, int *q)
+{
+ struct S s, *t;
+ s.a = 1;
+ s.p = p;
+ t = bar (&s);
+ t->p = q;
+ s.p[0] = 0;
+ t->p[0] = 1;
+ return s.p[0];
+}
+
+int
+main ()
+{
+ int a, b;
+ if (foo (&a, &b) != 1)
+ abort ();
+ return 0;
+}
return p1[y];
}
-/* { dg-final { scan-tree-dump-times "return 1;" 2 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "return 1;" 2 "optimized" { xfail *-*-* } } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
&& ((rhs_code == SSA_NAME && rhs == name)
|| CONVERT_EXPR_CODE_P (rhs_code)))
{
- /* Don't propagate restrict pointer's RHS. */
- if (TYPE_RESTRICT (TREE_TYPE (lhs))
- && !TYPE_RESTRICT (TREE_TYPE (name))
- && !is_gimple_min_invariant (def_rhs))
- return false;
/* Only recurse if we don't deal with a single use or we cannot
do the propagation to the current statement. In particular
we can end up with a conversion needed for a non-invariant
&& (!in_ipa_mode
|| DECL_EXTERNAL (lhsop) || TREE_PUBLIC (lhsop)))
make_escape_constraint (rhsop);
- /* If this is a conversion of a non-restrict pointer to a
- restrict pointer track it with a new heapvar. */
- else if (gimple_assign_cast_p (t)
- && POINTER_TYPE_P (TREE_TYPE (rhsop))
- && POINTER_TYPE_P (TREE_TYPE (lhsop))
- && !TYPE_RESTRICT (TREE_TYPE (rhsop))
- && TYPE_RESTRICT (TREE_TYPE (lhsop)))
- make_constraint_from_restrict (get_vi_for_tree (lhsop),
- "CAST_RESTRICT");
}
/* Handle escapes through return. */
else if (gimple_code (t) == GIMPLE_RETURN
!= TYPE_ADDR_SPACE (TREE_TYPE (inner_type)))
return false;
- /* Do not lose casts to restrict qualified pointers. */
- if ((TYPE_RESTRICT (outer_type)
- != TYPE_RESTRICT (inner_type))
- && TYPE_RESTRICT (outer_type))
- return false;
-
/* If the outer type is (void *), the conversion is not necessary. */
if (VOID_TYPE_P (TREE_TYPE (outer_type)))
return true;