From a7c412fe45346de954c1f8af7ddf4d5c0943d80b Mon Sep 17 00:00:00 2001
From: marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 28 Jun 2017 12:47:24 +0000
Subject: [PATCH 1/6] Backport r249735
gcc/ChangeLog:
2017-06-28 Martin Liska <mliska@suse.cz>
PR ipa/81128
* ipa-visibility.c (non_local_p): Handle visibility.
gcc/c-family/ChangeLog:
2017-06-28 Martin Liska <mliska@suse.cz>
PR ipa/81128
* c-attribs.c (handle_alias_ifunc_attribute): Append ifunc alias
to a function declaration.
gcc/testsuite/ChangeLog:
2017-06-28 Martin Liska <mliska@suse.cz>
PR ipa/81128
* gcc.target/i386/pr81128.c: New test.
---
gcc/c-family/c-common.c | 11 ++++--
gcc/ipa-visibility.c | 3 +-
gcc/testsuite/gcc.target/i386/pr81128.c | 65 +++++++++++++++++++++++++++++++++
3 files changed, 75 insertions(+), 4 deletions(-)
create mode 100644 gcc/testsuite/gcc.target/i386/pr81128.c
@@ -7940,9 +7940,14 @@ handle_alias_ifunc_attribute (bool is_alias, tree *node, tree name, tree args,
TREE_STATIC (decl) = 1;
if (!is_alias)
- /* ifuncs are also aliases, so set that attribute too. */
- DECL_ATTRIBUTES (decl)
- = tree_cons (get_identifier ("alias"), args, DECL_ATTRIBUTES (decl));
+ {
+ /* ifuncs are also aliases, so set that attribute too. */
+ DECL_ATTRIBUTES (decl)
+ = tree_cons (get_identifier ("alias"), args,
+ DECL_ATTRIBUTES (decl));
+ DECL_ATTRIBUTES (decl) = tree_cons (get_identifier ("ifunc"),
+ NULL, DECL_ATTRIBUTES (decl));
+ }
}
else
{
@@ -112,7 +112,8 @@ non_local_p (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED)
&& !DECL_EXTERNAL (node->decl)
&& !node->externally_visible
&& !node->used_from_other_partition
- && !node->in_other_partition);
+ && !node->in_other_partition
+ && node->get_availability () >= AVAIL_AVAILABLE);
}
/* Return true when function can be marked local. */
new file mode 100644
@@ -0,0 +1,65 @@
+/* PR ipa/81128 */
+/* { dg-do run } */
+/* { dg-options "-O3" } */
+/* { dg-require-ifunc "" } */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+int resolver_fn = 0;
+int resolved_fn = 0;
+
+static inline void
+do_it_right_at_runtime_A ()
+{
+ resolved_fn++;
+}
+
+static inline void
+do_it_right_at_runtime_B ()
+{
+ resolved_fn++;
+}
+
+static inline void do_it_right_at_runtime (void);
+
+void do_it_right_at_runtime (void)
+ __attribute__ ((ifunc ("resolve_do_it_right_at_runtime")));
+
+static void (*resolve_do_it_right_at_runtime (void)) (void)
+{
+ srand (time (NULL));
+ int r = rand ();
+ resolver_fn++;
+
+ /* Use intermediate variable to get a warning for non-matching
+ * prototype. */
+ typeof(do_it_right_at_runtime) *func;
+ if (r & 1)
+ func = do_it_right_at_runtime_A;
+ else
+ func = do_it_right_at_runtime_B;
+
+ return (void *) func;
+}
+
+int
+main (void)
+{
+ const unsigned int ITERS = 10;
+
+ for (int i = ITERS; i > 0; i--)
+ {
+ do_it_right_at_runtime ();
+ }
+
+ if (resolver_fn != 1)
+ __builtin_abort ();
+
+ if (resolved_fn != 10)
+ __builtin_abort ();
+
+ return 0;
+}
--
2.14.1