new file mode 100644
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-fre1" } */
+
+unsigned int foo(unsigned int x, int *p)
+{
+ unsigned int src = x;
+ unsigned int dst;
+ *p = sizeof (unsigned int);
+ __builtin___memcpy_chk (&dst, &src, *p, 16);
+ return dst;
+}
+
+/* { dg-final { scan-tree-dump "return x" "fre1" } } */
@@ -2377,14 +2377,17 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *data_,
from that definition.
1) Memset. */
if (is_gimple_reg_type (vr->type)
- && gimple_call_builtin_p (def_stmt, BUILT_IN_MEMSET)
+ && (gimple_call_builtin_p (def_stmt, BUILT_IN_MEMSET)
+ || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMSET_CHK))
&& (integer_zerop (gimple_call_arg (def_stmt, 1))
|| ((TREE_CODE (gimple_call_arg (def_stmt, 1)) == INTEGER_CST
|| (INTEGRAL_TYPE_P (vr->type) && known_eq (ref->size, 8)))
&& CHAR_BIT == 8 && BITS_PER_UNIT == 8
&& offset.is_constant (&offseti)
&& offseti % BITS_PER_UNIT == 0))
- && poly_int_tree_p (gimple_call_arg (def_stmt, 2))
+ && (poly_int_tree_p (gimple_call_arg (def_stmt, 2))
+ || (TREE_CODE (gimple_call_arg (def_stmt, 2)) == SSA_NAME
+ && poly_int_tree_p (SSA_VAL (gimple_call_arg (def_stmt, 2)))))
&& (TREE_CODE (gimple_call_arg (def_stmt, 0)) == ADDR_EXPR
|| TREE_CODE (gimple_call_arg (def_stmt, 0)) == SSA_NAME))
{
@@ -2444,6 +2447,8 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *data_,
else
return (void *)-1;
tree len = gimple_call_arg (def_stmt, 2);
+ if (TREE_CODE (len) == SSA_NAME)
+ len = SSA_VAL (len);
HOST_WIDE_INT leni, offset2i, offseti;
/* Sometimes the above trickery is smarter than alias analysis. Take
advantage of that. */
@@ -2925,13 +2930,19 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *data_,
&& is_gimple_reg_type (vr->type)
/* ??? Handle BCOPY as well. */
&& (gimple_call_builtin_p (def_stmt, BUILT_IN_MEMCPY)
+ || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMCPY_CHK)
|| gimple_call_builtin_p (def_stmt, BUILT_IN_MEMPCPY)
- || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMMOVE))
+ || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMPCPY_CHK)
+ || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMMOVE)
+ || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMMOVE_CHK))
&& (TREE_CODE (gimple_call_arg (def_stmt, 0)) == ADDR_EXPR
|| TREE_CODE (gimple_call_arg (def_stmt, 0)) == SSA_NAME)
&& (TREE_CODE (gimple_call_arg (def_stmt, 1)) == ADDR_EXPR
|| TREE_CODE (gimple_call_arg (def_stmt, 1)) == SSA_NAME)
- && poly_int_tree_p (gimple_call_arg (def_stmt, 2), ©_size)
+ && (poly_int_tree_p (gimple_call_arg (def_stmt, 2), ©_size)
+ || (TREE_CODE (gimple_call_arg (def_stmt, 2)) == SSA_NAME
+ && poly_int_tree_p (SSA_VAL (gimple_call_arg (def_stmt, 2)),
+ ©_size)))
/* Handling this is more complicated, give up for now. */
&& data->partial_defs.is_empty ())
{