1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c
index 67c669e..715c2f1 100644
--- a/gcc/tree-ssa-alias.c
+++ b/gcc/tree-ssa-alias.c
@@ -1097,6 +1097,10 @@ process_args:
   for (i = 0; i < gimple_call_num_args (call); ++i)
     {
       tree op = gimple_call_arg (call, i);
+      int flags = gimple_call_arg_flags (call, i);
+
+      if (flags & EAF_UNUSED)
+	continue;
 
       if (TREE_CODE (op) == WITH_SIZE_EXPR)
 	op = TREE_OPERAND (op, 0);