re PR fortran/60526 (Accepts-invalid: Variable name same as type name)

2016-02-14  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/60526
	* decl.c (build_sym):  If the name has already been defined as a
	type, issue error and return false.

2016-02-14  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/60526
	* gfortran.dg/type_decl_4.f90:  New test.

From-SVN: r233410

gcc/fortran/ChangeLog

+2016-02-14  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	PR fortran/60526
+	* decl.c (build_sym):  If the name has already been defined as a
+	type, issue error and return false.
+
 2016-02-12  David Malcolm  <dmalcolm@redhat.com>
 
 	PR other/69554

gcc/fortran/decl.c

@@ -1215,10 +1215,30 @@ build_sym (const char *name, gfc_charlen *cl, bool cl_deferred,
 {
   symbol_attribute attr;
   gfc_symbol *sym;
+  int nlen;
+  char u_name[GFC_MAX_SYMBOL_LEN + 1];
+  gfc_symtree *st;
 
   if (gfc_get_symbol (name, NULL, &sym))
     return false;
 
+  /* Check if the name has already been defined as a type.  The
+     first letter of the symtree will be in upper case then.  */
+
+  nlen = strlen(name);
+  gcc_assert (nlen <= GFC_MAX_SYMBOL_LEN);
+  strncpy (u_name, name, nlen + 1);
+  u_name[0] = TOUPPER(u_name[0]);
+
+  st = gfc_find_symtree (gfc_current_ns->sym_root, u_name);
+
+  if (st != 0)
+    {
+      gfc_error ("Symbol %qs at %C also declared as a type at %L", name,
+		 &st->n.sym->declared_at);
+      return false;
+    }
+
   /* Start updating the symbol table.  Add basic type attribute if present.  */
   if (current_ts.type != BT_UNKNOWN
       && (sym->attr.implicit_type == 0

gcc/testsuite/ChangeLog

+2016-02-14  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	PR fortran/60526
+	* gfortran.dg/type_decl_4.f90:  New test.
+
 2016-02-14  Alan Modra  <amodra@gmail.com>
 
 	PR testsuite/68886

gcc/testsuite/gfortran.dg/type_decl_4.f90

+! { dg-do compile }
+program main
+  type Xx ! { dg-error "Symbol 'xx' at .1. also declared as a type at .2." }
+  end type Xx
+  real :: Xx  ! { dg-error "Symbol 'xx' at .1. also declared as a type at .2." }
+  
+end program main