OSDN Git Service

2009-11-26 Jerry DeLisle <jvdelisle@gcc.gnu.org>
[pf3gnuchains/gcc-fork.git] / gcc / fortran / expr.c
index 71acbd6..cbd3172 100644 (file)
@@ -156,8 +156,12 @@ free_expr0 (gfc_expr *e)
          break;
 
        case BT_COMPLEX:
+#ifdef HAVE_mpc
+         mpc_clear (e->value.complex);
+#else
          mpfr_clear (e->value.complex.r);
          mpfr_clear (e->value.complex.i);
+#endif
          break;
 
        default:
@@ -326,6 +330,36 @@ gfc_has_vector_index (gfc_expr *e)
 }
 
 
+/* Insert a reference to the component of the given name.
+   Only to be used with CLASS containers.  */
+
+void
+gfc_add_component_ref (gfc_expr *e, const char *name)
+{
+  gfc_ref **tail = &(e->ref);
+  gfc_ref *next = NULL;
+  gfc_symbol *derived = e->symtree->n.sym->ts.u.derived;
+  while (*tail != NULL)
+    {
+      if ((*tail)->type == REF_COMPONENT)
+       derived = (*tail)->u.c.component->ts.u.derived;
+      if ((*tail)->type == REF_ARRAY && (*tail)->next == NULL)
+       break;
+      tail = &((*tail)->next);
+    }
+  if (*tail != NULL && strcmp (name, "$data") == 0)
+    next = *tail;
+  (*tail) = gfc_get_ref();
+  (*tail)->next = next;
+  (*tail)->type = REF_COMPONENT;
+  (*tail)->u.c.sym = derived;
+  (*tail)->u.c.component = gfc_find_component (derived, name, true, true);
+  gcc_assert((*tail)->u.c.component);
+  if (!next)
+    e->ts = (*tail)->u.c.component->ts;
+}
+
+
 /* Copy a shape array.  */
 
 mpz_t *
@@ -439,10 +473,15 @@ gfc_copy_expr (gfc_expr *p)
 
        case BT_COMPLEX:
          gfc_set_model_kind (q->ts.kind);
+#ifdef HAVE_mpc
+         mpc_init2 (q->value.complex, mpfr_get_default_prec());
+         mpc_set (q->value.complex, p->value.complex, GFC_MPC_RND_MODE);
+#else
          mpfr_init (q->value.complex.r);
          mpfr_init (q->value.complex.i);
          mpfr_set (q->value.complex.r, p->value.complex.r, GFC_RND_MODE);
          mpfr_set (q->value.complex.i, p->value.complex.i, GFC_RND_MODE);
+#endif
          break;
 
        case BT_CHARACTER:
@@ -472,6 +511,7 @@ gfc_copy_expr (gfc_expr *p)
        case BT_HOLLERITH:
        case BT_LOGICAL:
        case BT_DERIVED:
+       case BT_CLASS:
          break;                /* Already done.  */
 
        case BT_PROCEDURE:
@@ -1495,14 +1535,13 @@ simplify_const_ref (gfc_expr *p)
                      else
                        string_len = 0;
 
-                     if (!p->ts.cl)
-                       {
-                         p->ts.cl = gfc_get_charlen ();
-                         p->ts.cl->next = NULL;
-                         p->ts.cl->length = NULL;
-                       }
-                     gfc_free_expr (p->ts.cl->length);
-                     p->ts.cl->length = gfc_int_expr (string_len);
+                     if (!p->ts.u.cl)
+                       p->ts.u.cl = gfc_new_charlen (p->symtree->n.sym->ns,
+                                                     NULL);
+                     else
+                       gfc_free_expr (p->ts.u.cl->length);
+
+                     p->ts.u.cl->length = gfc_int_expr (string_len);
                    }
                }
              gfc_free_ref_list (p->ref);
@@ -1654,18 +1693,16 @@ gfc_simplify_expr (gfc_expr *p, int type)
          gfc_char_t *s;
          int start, end;
 
+         start = 0;
          if (p->ref && p->ref->u.ss.start)
            {
              gfc_extract_int (p->ref->u.ss.start, &start);
              start--;  /* Convert from one-based to zero-based.  */
            }
-         else
-           start = 0;
 
+         end = p->value.character.length;
          if (p->ref && p->ref->u.ss.end)
            gfc_extract_int (p->ref->u.ss.end, &end);
-         else
-           end = p->value.character.length;
 
          s = gfc_get_wide_string (end - start + 2);
          memcpy (s, p->value.character.string + start,
@@ -1674,10 +1711,8 @@ gfc_simplify_expr (gfc_expr *p, int type)
          gfc_free (p->value.character.string);
          p->value.character.string = s;
          p->value.character.length = end - start;
-         p->ts.cl = gfc_get_charlen ();
-         p->ts.cl->next = gfc_current_ns->cl_list;
-         gfc_current_ns->cl_list = p->ts.cl;
-         p->ts.cl->length = gfc_int_expr (p->value.character.length);
+         p->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
+         p->ts.u.cl->length = gfc_int_expr (p->value.character.length);
          gfc_free_ref_list (p->ref);
          p->ref = NULL;
          p->expr_type = EXPR_CONSTANT;
@@ -2097,7 +2132,7 @@ check_inquiry (gfc_expr *e, int not_restricted)
           with LEN, as required by the standard.  */
        if (i == 5 && not_restricted
            && ap->expr->symtree->n.sym->ts.type == BT_CHARACTER
-           && ap->expr->symtree->n.sym->ts.cl->length == NULL)
+           && ap->expr->symtree->n.sym->ts.u.cl->length == NULL)
          {
            gfc_error ("Assumed character length variable '%s' in constant "
                       "expression at %L", e->symtree->n.sym->name, &e->where);
@@ -2128,9 +2163,10 @@ check_transformational (gfc_expr *e)
   };
 
   static const char * const trans_func_f2003[] =  {
-    "dot_product", "matmul", "null", "pack", "repeat",
-    "reshape", "selected_char_kind", "selected_int_kind",
-    "selected_real_kind", "transfer", "transpose", "trim", NULL
+    "all", "any", "count", "dot_product", "matmul", "null", "pack",
+    "product", "repeat", "reshape", "selected_char_kind", "selected_int_kind",
+    "selected_real_kind", "spread", "sum", "transfer", "transpose",
+    "trim", "unpack", NULL
   };
 
   int i;
@@ -3119,7 +3155,9 @@ gfc_check_pointer_assign (gfc_expr *lvalue, gfc_expr *rvalue)
       return FAILURE;
     }
 
-  if (!pointer && !proc_pointer)
+  if (!pointer && !proc_pointer
+       && !(lvalue->ts.type == BT_CLASS
+               && lvalue->ts.u.derived->components->attr.pointer))
     {
       gfc_error ("Pointer assignment to non-POINTER at %L", &lvalue->where);
       return FAILURE;
@@ -3143,6 +3181,11 @@ gfc_check_pointer_assign (gfc_expr *lvalue, gfc_expr *rvalue)
   /* Checks on rvalue for procedure pointer assignments.  */
   if (proc_pointer)
     {
+      char err[200];
+      gfc_symbol *s1,*s2;
+      gfc_component *comp;
+      const char *name;
+
       attr = gfc_expr_attr (rvalue);
       if (!((rvalue->expr_type == EXPR_NULL)
            || (rvalue->expr_type == EXPR_FUNCTION && attr.proc_pointer)
@@ -3177,17 +3220,60 @@ gfc_check_pointer_assign (gfc_expr *lvalue, gfc_expr *rvalue)
                              rvalue->symtree->name, &rvalue->where) == FAILURE)
            return FAILURE;
        }
-      /* TODO: Enable interface check for PPCs.  */
-      if (is_proc_ptr_comp (rvalue, NULL))
-       return SUCCESS;
+
+      /* Ensure that the calling convention is the same. As other attributes
+        such as DLLEXPORT may differ, one explicitly only tests for the
+        calling conventions.  */
       if (rvalue->expr_type == EXPR_VARIABLE
-         && !gfc_compare_interfaces (lvalue->symtree->n.sym,
-                                     rvalue->symtree->n.sym, 0, 1))
+         && lvalue->symtree->n.sym->attr.ext_attr
+              != rvalue->symtree->n.sym->attr.ext_attr)
+       {
+         symbol_attribute calls;
+
+         calls.ext_attr = 0;
+         gfc_add_ext_attribute (&calls, EXT_ATTR_CDECL, NULL);
+         gfc_add_ext_attribute (&calls, EXT_ATTR_STDCALL, NULL);
+         gfc_add_ext_attribute (&calls, EXT_ATTR_FASTCALL, NULL);
+
+         if ((calls.ext_attr & lvalue->symtree->n.sym->attr.ext_attr)
+             != (calls.ext_attr & rvalue->symtree->n.sym->attr.ext_attr))
+           {
+             gfc_error ("Mismatch in the procedure pointer assignment "
+                        "at %L: mismatch in the calling convention",
+                        &rvalue->where);
+         return FAILURE;
+           }
+       }
+
+      if (gfc_is_proc_ptr_comp (lvalue, &comp))
+       s1 = comp->ts.interface;
+      else
+       s1 = lvalue->symtree->n.sym;
+
+      if (gfc_is_proc_ptr_comp (rvalue, &comp))
+       {
+         s2 = comp->ts.interface;
+         name = comp->name;
+       }
+      else if (rvalue->expr_type == EXPR_FUNCTION)
+       {
+         s2 = rvalue->symtree->n.sym->result;
+         name = rvalue->symtree->n.sym->result->name;
+       }
+      else
+       {
+         s2 = rvalue->symtree->n.sym;
+         name = rvalue->symtree->n.sym->name;
+       }
+
+      if (s1 && s2 && !gfc_compare_interfaces (s1, s2, name, 0, 1,
+                                              err, sizeof(err)))
        {
-         gfc_error ("Interfaces don't match "
-                    "in procedure pointer assignment at %L", &rvalue->where);
+         gfc_error ("Interface mismatch in procedure pointer assignment "
+                    "at %L: %s", &rvalue->where, err);
          return FAILURE;
        }
+
       return SUCCESS;
     }
 
@@ -3199,7 +3285,7 @@ gfc_check_pointer_assign (gfc_expr *lvalue, gfc_expr *rvalue)
       return FAILURE;
     }
 
-  if (lvalue->ts.kind != rvalue->ts.kind)
+  if (lvalue->ts.type != BT_CLASS && lvalue->ts.kind != rvalue->ts.kind)
     {
       gfc_error ("Different kind type parameters in pointer "
                 "assignment at %L", &lvalue->where);
@@ -3279,7 +3365,10 @@ gfc_check_assign_symbol (gfc_symbol *sym, gfc_expr *rvalue)
   lvalue.symtree->n.sym = sym;
   lvalue.where = sym->declared_at;
 
-  if (sym->attr.pointer || sym->attr.proc_pointer)
+  if (sym->attr.pointer || sym->attr.proc_pointer
+      || (sym->ts.type == BT_CLASS 
+         && sym->ts.u.derived->components->attr.pointer
+         && rvalue->expr_type == EXPR_NULL))
     r = gfc_check_pointer_assign (&lvalue, rvalue);
   else
     r = gfc_check_assign (&lvalue, rvalue, 1);
@@ -3300,7 +3389,7 @@ gfc_default_initializer (gfc_typespec *ts)
   gfc_component *c;
 
   /* See if we have a default initializer.  */
-  for (c = ts->derived->components; c; c = c->next)
+  for (c = ts->u.derived->components; c; c = c->next)
     if (c->initializer || c->attr.allocatable)
       break;
 
@@ -3311,10 +3400,10 @@ gfc_default_initializer (gfc_typespec *ts)
   init = gfc_get_expr ();
   init->expr_type = EXPR_STRUCTURE;
   init->ts = *ts;
-  init->where = ts->derived->declared_at;
+  init->where = ts->u.derived->declared_at;
 
   tail = NULL;
-  for (c = ts->derived->components; c; c = c->next)
+  for (c = ts->u.derived->components; c; c = c->next)
     {
       if (tail == NULL)
        init->value.constructor = tail = gfc_get_constructor ();
@@ -3384,10 +3473,10 @@ gfc_traverse_expr (gfc_expr *expr, gfc_symbol *sym,
     return true;
 
   if (expr->ts.type == BT_CHARACTER
-       && expr->ts.cl
-       && expr->ts.cl->length
-       && expr->ts.cl->length->expr_type != EXPR_CONSTANT
-       && gfc_traverse_expr (expr->ts.cl->length, sym, func, f))
+       && expr->ts.u.cl
+       && expr->ts.u.cl->length
+       && expr->ts.u.cl->length->expr_type != EXPR_CONSTANT
+       && gfc_traverse_expr (expr->ts.u.cl->length, sym, func, f))
     return true;
 
   switch (expr->expr_type)
@@ -3465,11 +3554,11 @@ gfc_traverse_expr (gfc_expr *expr, gfc_symbol *sym,
 
        case REF_COMPONENT:
          if (ref->u.c.component->ts.type == BT_CHARACTER
-               && ref->u.c.component->ts.cl
-               && ref->u.c.component->ts.cl->length
-               && ref->u.c.component->ts.cl->length->expr_type
+               && ref->u.c.component->ts.u.cl
+               && ref->u.c.component->ts.u.cl->length
+               && ref->u.c.component->ts.u.cl->length->expr_type
                     != EXPR_CONSTANT
-               && gfc_traverse_expr (ref->u.c.component->ts.cl->length,
+               && gfc_traverse_expr (ref->u.c.component->ts.u.cl->length,
                                      sym, func, f))
            return true;
 
@@ -3518,7 +3607,7 @@ gfc_expr_set_symbols_referenced (gfc_expr *expr)
    provided).  */
 
 bool
-is_proc_ptr_comp (gfc_expr *expr, gfc_component **comp)
+gfc_is_proc_ptr_comp (gfc_expr *expr, gfc_component **comp)
 {
   gfc_ref *ref;
   bool ppc = false;
@@ -3632,3 +3721,39 @@ gfc_expr_replace_symbols (gfc_expr *expr, gfc_symbol *dest)
 {
   gfc_traverse_expr (expr, dest, &replace_symbol, 0);
 }
+
+/* The following is analogous to 'replace_symbol', and needed for copying
+   interfaces for procedure pointer components. The argument 'sym' must formally
+   be a gfc_symbol, so that the function can be passed to gfc_traverse_expr.
+   However, it gets actually passed a gfc_component (i.e. the procedure pointer
+   component in whose formal_ns the arguments have to be).  */
+
+static bool
+replace_comp (gfc_expr *expr, gfc_symbol *sym, int *i ATTRIBUTE_UNUSED)
+{
+  gfc_component *comp;
+  comp = (gfc_component *)sym;
+  if ((expr->expr_type == EXPR_VARIABLE 
+       || (expr->expr_type == EXPR_FUNCTION
+          && !gfc_is_intrinsic (expr->symtree->n.sym, 0, expr->where)))
+      && expr->symtree->n.sym->ns == comp->ts.interface->formal_ns)
+    {
+      gfc_symtree *stree;
+      gfc_namespace *ns = comp->formal_ns;
+      /* Don't use gfc_get_symtree as we prefer to fail badly if we don't find
+        the symtree rather than create a new one (and probably fail later).  */
+      stree = gfc_find_symtree (ns ? ns->sym_root : gfc_current_ns->sym_root,
+                               expr->symtree->n.sym->name);
+      gcc_assert (stree);
+      stree->n.sym->attr = expr->symtree->n.sym->attr;
+      expr->symtree = stree;
+    }
+  return false;
+}
+
+void
+gfc_expr_replace_comp (gfc_expr *expr, gfc_component *dest)
+{
+  gfc_traverse_expr (expr, (gfc_symbol *)dest, &replace_comp, 0);
+}
+