X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fc-convert.c;h=8fa68a190b6032161d09e2a7ded9847a8e23e885;hb=56dffa8ca55e53bc087c01fb00b73f5b8d2a549f;hp=57fc967d2ed5b5708e8f7f07a701d70e64258d6b;hpb=d1b92730f38c5396f7f1c87b64a3d8579be78d73;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/gcc/c-convert.c b/gcc/c-convert.c
index 57fc967d2ed..8fa68a190b6 100644
--- a/gcc/c-convert.c
+++ b/gcc/c-convert.c
@@ -1,12 +1,12 @@
 /* Language-level data type conversion for GNU C.
-   Copyright (C) 1987, 1988, 1991, 1998, 2002, 2003
+   Copyright (C) 1987, 1988, 1991, 1998, 2002, 2003, 2004, 2005, 2007
    Free Software Foundation, Inc.
 
 This file is part of GCC.
 
 GCC is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
@@ -15,9 +15,8 @@ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
 
 You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING.  If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.  */
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
 
 
 /* This file contains the functions for converting C expressions
@@ -33,8 +32,10 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include "flags.h"
 #include "convert.h"
 #include "c-common.h"
+#include "c-tree.h"
 #include "langhooks.h"
 #include "toplev.h"
+#include "target.h"
 
 /* Change of width--truncation and extension of integers or reals--
    is represented with NOP_EXPR.  Proper functioning of many things
@@ -68,14 +69,25 @@ convert (tree type, tree expr)
 {
   tree e = expr;
   enum tree_code code = TREE_CODE (type);
+  const char *invalid_conv_diag;
 
-  if (type == TREE_TYPE (expr)
-      || TREE_CODE (expr) == ERROR_MARK
-      || code == ERROR_MARK || TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK)
+  if (type == error_mark_node
+      || expr == error_mark_node
+      || TREE_TYPE (expr) == error_mark_node)
+    return error_mark_node;
+
+  if ((invalid_conv_diag
+       = targetm.invalid_conversion (TREE_TYPE (expr), type)))
+    {
+      error (invalid_conv_diag);
+      return error_mark_node;
+    }
+
+  if (type == TREE_TYPE (expr))
     return expr;
 
   if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (expr)))
-    return fold (build1 (NOP_EXPR, type, expr));
+    return fold_convert (type, expr);
   if (TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK)
     return error_mark_node;
   if (TREE_CODE (TREE_TYPE (expr)) == VOID_TYPE)
@@ -84,36 +96,24 @@ convert (tree type, tree expr)
       return error_mark_node;
     }
   if (code == VOID_TYPE)
-    return build1 (CONVERT_EXPR, type, e);
-#if 0
-  /* This is incorrect.  A truncation can't be stripped this way.
-     Extensions will be stripped by the use of get_unwidened.  */
-  if (TREE_CODE (expr) == NOP_EXPR)
-    return convert (type, TREE_OPERAND (expr, 0));
-#endif
+    return fold_convert (type, e);
   if (code == INTEGER_TYPE || code == ENUMERAL_TYPE)
     return fold (convert_to_integer (type, e));
   if (code == BOOLEAN_TYPE)
-    {
-      tree t = (*lang_hooks.truthvalue_conversion) (expr);
-      if (TREE_CODE (t) == ERROR_MARK)
-	return t;
-
-      /* If it returns a NOP_EXPR, we must fold it here to avoid
-	 infinite recursion between fold () and convert ().  */
-      if (TREE_CODE (t) == NOP_EXPR)
-	return fold (build1 (NOP_EXPR, type, TREE_OPERAND (t, 0)));
-      else
-	return fold (build1 (NOP_EXPR, type, t));
-    }
+    return fold_convert (type, c_objc_common_truthvalue_conversion (expr));
   if (code == POINTER_TYPE || code == REFERENCE_TYPE)
     return fold (convert_to_pointer (type, e));
   if (code == REAL_TYPE)
     return fold (convert_to_real (type, e));
+  if (code == FIXED_POINT_TYPE)
+    return fold (convert_to_fixed (type, e));
   if (code == COMPLEX_TYPE)
     return fold (convert_to_complex (type, e));
   if (code == VECTOR_TYPE)
     return fold (convert_to_vector (type, e));
+  if ((code == RECORD_TYPE || code == UNION_TYPE)
+      && lang_hooks.types_compatible_p (type, TREE_TYPE (expr)))
+      return e;
 
   error ("conversion to non-scalar type requested");
   return error_mark_node;