(decl_attributes): Support attributes `volatile'

with alias `noreturn', and `const'.

From-SVN: r5082

diff --git a/gcc/c-common.c b/gcc/c-common.c
index fae1e44550b000c8a072dbef6f76cedcab2cff11..b5a1cdd27b5262043a9da20858d0cd1732d5bb6c 100644 (file)
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -222,6 +222,17 @@ decl_attributes (decl, attributes)
        /* We can't set DECL_PACKED for a VAR_DECL, because the bit is
           used for DECL_REGISTER.  It wouldn't mean anything anyway.  */
       }
+    else if (TREE_VALUE (a) == get_identifier ("noreturn")
+            || TREE_VALUE (a) == get_identifier ("volatile"))
+      {
+       if (TREE_CODE (decl) == FUNCTION_DECL)
+         TREE_THIS_VOLATILE (decl) = 1;
+      }
+    else if (TREE_VALUE (a) == get_identifier ("const"))
+      {
+       if (TREE_CODE (decl) == FUNCTION_DECL)
+         TREE_READONLY (decl) = 1;
+      }
     else if (TREE_VALUE (a) != 0
             && TREE_CODE (TREE_VALUE (a)) == TREE_LIST
             && TREE_PURPOSE (TREE_VALUE (a)) == get_identifier ("mode"))