--- /dev/null
+/* { dg-do run } */
+/* { dg-options "-std=c++0x -fno-tree-forwprop" } */
+
+typedef __SIZE_TYPE__ size_t;
+
+template < typename > struct remove_reference;
+template < typename _Tp > struct remove_reference <_Tp & >
+{
+ typedef _Tp type;
+};
+template < typename _Tp > typename remove_reference < _Tp >::type &&
+move (_Tp && __t)
+{
+ return static_cast < typename remove_reference < _Tp >::type && >(__t);
+}
+
+template < typename _Tp > void
+stdswap (_Tp & __a, _Tp & __b)
+{
+ _Tp __tmp (__a);
+ __a = (__b);
+ __b = (__tmp);
+}
+
+struct _Deque_iterator
+{
+ int *_M_cur;
+ int *_M_first;
+ int *_M_last;
+ int **_M_node;
+};
+
+static inline int operatorMIN (_Deque_iterator & __x, _Deque_iterator & __y)
+{
+ return sizeof (int) * (__x._M_node - __y._M_node - 1)
+ + (__x._M_cur - __x._M_first) + (__y._M_last - __y._M_cur);
+}
+
+struct deque
+{
+ deque & operator = (deque && __x)
+ {
+ stdswap (_M_finish, __x._M_finish);
+ return *this;
+ }
+ size_t size ()
+ {
+ return operatorMIN (_M_finish, _M_start);
+ }
+
+deque ():
+ _M_map (), _M_map_size (), _M_start (), _M_finish ()
+ {
+ _M_start._M_last = _M_start._M_first + sizeof (int);
+ }
+
+ int **_M_map;
+ size_t _M_map_size;
+ _Deque_iterator _M_start;
+ _Deque_iterator _M_finish;
+};
+
+struct queue
+{
+ deque c;
+ size_t size ()
+ {
+ return c.size ();
+ }
+};
+
+void
+test01 ()
+{
+ queue a, b;
+ ++a.c._M_finish._M_cur;
+ b = move (a);
+ if (!b.size ())
+ __builtin_abort ();
+}
+
+main ()
+{
+ test01 ();
+}
+
/* Transform any SSA_NAME's in a vector of vn_reference_op_s
structures into their value numbers. This is done in-place, and
- the vector passed in is returned. */
+ the vector passed in is returned. *VALUEIZED_ANYTHING will specify
+ whether any operands were valueized. */
static VEC (vn_reference_op_s, heap) *
-valueize_refs (VEC (vn_reference_op_s, heap) *orig)
+valueize_refs_1 (VEC (vn_reference_op_s, heap) *orig, bool *valueized_anything)
{
vn_reference_op_t vro;
unsigned int i;
+ *valueized_anything = false;
+
FOR_EACH_VEC_ELT (vn_reference_op_s, orig, i, vro)
{
if (vro->opcode == SSA_NAME
|| (vro->op0 && TREE_CODE (vro->op0) == SSA_NAME))
{
- vro->op0 = SSA_VAL (vro->op0);
+ tree tem = SSA_VAL (vro->op0);
+ if (tem != vro->op0)
+ {
+ *valueized_anything = true;
+ vro->op0 = tem;
+ }
/* If it transforms from an SSA_NAME to a constant, update
the opcode. */
if (TREE_CODE (vro->op0) != SSA_NAME && vro->opcode == SSA_NAME)
vro->opcode = TREE_CODE (vro->op0);
}
if (vro->op1 && TREE_CODE (vro->op1) == SSA_NAME)
- vro->op1 = SSA_VAL (vro->op1);
+ {
+ tree tem = SSA_VAL (vro->op1);
+ if (tem != vro->op1)
+ {
+ *valueized_anything = true;
+ vro->op1 = tem;
+ }
+ }
if (vro->op2 && TREE_CODE (vro->op2) == SSA_NAME)
- vro->op2 = SSA_VAL (vro->op2);
+ {
+ tree tem = SSA_VAL (vro->op2);
+ if (tem != vro->op2)
+ {
+ *valueized_anything = true;
+ vro->op2 = tem;
+ }
+ }
/* If it transforms from an SSA_NAME to an address, fold with
a preceding indirect reference. */
if (i > 0
return orig;
}
+static VEC (vn_reference_op_s, heap) *
+valueize_refs (VEC (vn_reference_op_s, heap) *orig)
+{
+ bool tem;
+ return valueize_refs_1 (orig, &tem);
+}
+
static VEC(vn_reference_op_s, heap) *shared_lookup_references;
/* Create a vector of vn_reference_op_s structures from REF, a
REFERENCE_CLASS_P tree. The vector is shared among all callers of
- this function. */
+ this function. *VALUEIZED_ANYTHING will specify whether any
+ operands were valueized. */
static VEC(vn_reference_op_s, heap) *
-valueize_shared_reference_ops_from_ref (tree ref)
+valueize_shared_reference_ops_from_ref (tree ref, bool *valueized_anything)
{
if (!ref)
return NULL;
VEC_truncate (vn_reference_op_s, shared_lookup_references, 0);
copy_reference_ops_from_ref (ref, &shared_lookup_references);
- shared_lookup_references = valueize_refs (shared_lookup_references);
+ shared_lookup_references = valueize_refs_1 (shared_lookup_references,
+ valueized_anything);
return shared_lookup_references;
}
VEC (vn_reference_op_s, heap) *operands;
struct vn_reference_s vr1;
tree cst;
+ bool valuezied_anything;
if (vnresult)
*vnresult = NULL;
vr1.vuse = vuse ? SSA_VAL (vuse) : NULL_TREE;
- vr1.operands = operands = valueize_shared_reference_ops_from_ref (op);
+ vr1.operands = operands
+ = valueize_shared_reference_ops_from_ref (op, &valuezied_anything);
vr1.type = TREE_TYPE (op);
vr1.set = get_alias_set (op);
vr1.hashcode = vn_reference_compute_hash (&vr1);
{
vn_reference_t wvnresult;
ao_ref r;
- /* Make sure to use a valueized reference ... */
- if (!ao_ref_init_from_vn_reference (&r, vr1.set, vr1.type, vr1.operands))
+ /* Make sure to use a valueized reference if we valueized anything.
+ Otherwise preserve the full reference for advanced TBAA. */
+ if (!valuezied_anything
+ || !ao_ref_init_from_vn_reference (&r, vr1.set, vr1.type,
+ vr1.operands))
ao_ref_init (&r, op);
- else
- /* ... but also preserve a full reference tree for advanced TBAA. */
- r.ref = op;
vn_walk_kind = kind;
wvnresult =
(vn_reference_t)walk_non_aliased_vuses (&r, vr1.vuse,
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