From: Jan Hubicka <jh@suse.cz>
Date: Sun, 29 Nov 2020 15:31:47 +0000 (+0100)
Subject: Skip EAF_UNUSED parameters in handle_pure_call
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=01148fa656ba5a68bfe6d788c1a9bacd48ccc44f;p=gcc.git

Skip EAF_UNUSED parameters in handle_pure_call

	* tree-ssa-structalias.c (handle_pure_call): Skip EAF_UNUSED
	 parameters.
---

diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c
index 9f4de96d544..cf653be8b6d 100644
--- a/gcc/tree-ssa-structalias.c
+++ b/gcc/tree-ssa-structalias.c
@@ -4274,6 +4274,11 @@ handle_pure_call (gcall *stmt, vec<ce_s> *results)
   for (i = 0; i < gimple_call_num_args (stmt); ++i)
     {
       tree arg = gimple_call_arg (stmt, i);
+      int flags = gimple_call_arg_flags (stmt, i);
+
+      /* If the argument is not used we can ignore it.  */
+      if (flags & EAF_UNUSED)
+	continue;
       if (!uses)
 	{
 	  uses = get_call_use_vi (stmt);