Add EAF_NOREAD check to tree-ssa-uninit

gcc/ChangeLog:

2021-08-18  Jan Hubicka  <hubicka@ucw.cz>

	* tree-ssa-uninit.c (maybe_warn_pass_by_reference): Check also
	EAF_NOREAD.

diff --git a/gcc/tree-ssa-uninit.c b/gcc/tree-ssa-uninit.c
index d5cdffbae8bf5e362a609204960ec712c8c0a982..ad2cf48819b3abbca9f0d925e98ad4d90c9b666f 100644 (file)
--- a/gcc/tree-ssa-uninit.c
+++ b/gcc/tree-ssa-uninit.c
@@ -712,7 +712,7 @@ maybe_warn_pass_by_reference (gcall *stmt, wlimits &wlims)
        wlims.always_executed = false;
 
       /* Ignore args we are not going to read from.  */
-      if (gimple_call_arg_flags (stmt, argno - 1) & EAF_UNUSED)
+      if (gimple_call_arg_flags (stmt, argno - 1) & (EAF_UNUSED | EAF_NOREAD))
        continue;
 
       tree arg = gimple_call_arg (stmt, argno - 1);