only use rts_entities when number of parameters and results match

[r27463]

diff --git a/ast2firm.c b/ast2firm.c
index 00f7497..702730e 100644 (file)
--- a/ast2firm.c
+++ b/ast2firm.c
@@ -868,11 +868,11 @@ static const struct {
        { rts_strncmp,    1, "strncmp",      3, _C89 },
        { rts_strcpy,     1, "strcpy",       2, _C89 },
        { rts_strlen,     1, "strlen",       1, _C89 },
-       { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
+       { rts_memcpy,     1, "memcpy",       3, _C89 },
        { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
-       { rts_memmove,    1, "memmove",      3, _C89 },  /* HMM, man say its C99 */
-       { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
-       { rts_memcmp,     1, "memcmp",       3, _C89 },  /* HMM, man say its C99 */
+       { rts_memmove,    1, "memmove",      3, _C89 },
+       { rts_memset,     1, "memset",       3, _C89 },
+       { rts_memcmp,     1, "memcmp",       3, _C89 },
 };
 
 static ident *rts_idents[lengthof(rts_data)];
@@ -1026,6 +1026,22 @@ static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
                        if (id != rts_idents[i])
                                continue;
 
+                       function_type_t *function_type
+                               = &entity->declaration.type->function;
+                       /* rts_entities code can't handle a "wrong" number of parameters */
+                       if (function_type->unspecified_parameters)
+                               continue;
+
+                       /* check number of parameters */
+                       int n_params = count_parameters(function_type);
+                       if (n_params != rts_data[i].n_params)
+                               continue;
+
+                       type_t *return_type = skip_typeref(function_type->return_type);
+                       int     n_res       = return_type != type_void ? 1 : 0;
+                       if (n_res != rts_data[i].n_res)
+                               continue;
+
                        /* ignore those rts functions not necessary needed for current mode */
                        if ((c_mode & rts_data[i].flags) == 0)
                                continue;