re PR c++/3331 (member pointer inherits const)

        * tree.c (build1): Don't set TREE_READONLY on INDIRECT_REF.
        PR c++/3331
        * cp/init.c (resolve_offset_ref): Use build_indirect_ref.

From-SVN: r49132

1 files changed, 6 insertions, 0 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index 53d5889..adaa9ab 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -2507,6 +2507,12 @@ build1 (code, type, node)
       TREE_READONLY (t) = 0;
       break;
 
+    case INDIRECT_REF:
+      /* Whether a dereference is readonly has nothing to do with whether
+	 its operand is readonly.  */
+      TREE_READONLY (t) = 0;
+      break;
+
     default:
       if (TREE_CODE_CLASS (code) == '1' && node && TREE_CONSTANT (node))
 	TREE_CONSTANT (t) = 1;