2009-07-17 Richard Guenther <rguenther@suse.de>

[pf3gnuchains/gcc-fork.git] / gcc / c-common.c

diff --git a/gcc/c-common.c b/gcc/c-common.c
index 3aa8ed9..328e0fd 100644 (file)
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -8226,69 +8226,6 @@ c_cpp_error (cpp_reader *pfile ATTRIBUTE_UNUSED, int level,
   return ret;
 }
 
   return ret;
 }
 

-/* Walk a gimplified function and warn for functions whose return value is
-   ignored and attribute((warn_unused_result)) is set.  This is done before
-   inlining, so we don't have to worry about that.  */
-
-void
-c_warn_unused_result (gimple_seq seq)
-{
-  tree fdecl, ftype;
-  gimple_stmt_iterator i;
-
-  for (i = gsi_start (seq); !gsi_end_p (i); gsi_next (&i))
-    {
-      gimple g = gsi_stmt (i);
-
-      switch (gimple_code (g))
-       {
-       case GIMPLE_BIND:
-         c_warn_unused_result (gimple_bind_body (g));
-         break;
-       case GIMPLE_TRY:
-         c_warn_unused_result (gimple_try_eval (g));
-         c_warn_unused_result (gimple_try_cleanup (g));
-         break;
-       case GIMPLE_CATCH:
-         c_warn_unused_result (gimple_catch_handler (g));
-         break;
-       case GIMPLE_EH_FILTER:
-         c_warn_unused_result (gimple_eh_filter_failure (g));
-         break;
-
-       case GIMPLE_CALL:
-         if (gimple_call_lhs (g))
-           break;
-
-         /* This is a naked call, as opposed to a GIMPLE_CALL with an
-            LHS.  All calls whose value is ignored should be
-            represented like this.  Look for the attribute.  */
-         fdecl = gimple_call_fndecl (g);
-         ftype = TREE_TYPE (TREE_TYPE (gimple_call_fn (g)));
-
-         if (lookup_attribute ("warn_unused_result", TYPE_ATTRIBUTES (ftype)))
-           {
-             location_t loc = gimple_location (g);
-
-             if (fdecl)
-               warning_at (loc, OPT_Wunused_result, 
-                           "ignoring return value of %qD, "
-                           "declared with attribute warn_unused_result",
-                           fdecl);
-             else
-               warning_at (loc, OPT_Wunused_result,
-                           "ignoring return value of function "
-                           "declared with attribute warn_unused_result");
-           }
-         break;
-
-       default:
-         /* Not a container, not a call, or a call whose value is used.  */
-         break;
-       }
-    }
-}
-

 /* Convert a character from the host to the target execution character
    set.  cpplib handles this, mostly.  */
 
 /* Convert a character from the host to the target execution character
    set.  cpplib handles this, mostly.  */