[PATCH] Don't mark IFUNC resolver as only called directly

[H.J. Lu]

Since IFUNC resolver is called indirectly, don't mark IFUNC resolver as
only called directly.

OK for trunk?


H.J.
---
gcc/

        PR target/85345
        * cgraph.h: Include stringpool.h" and "attribs.h".
        (cgraph_node::only_called_directly_or_aliased_p): Return false
        for IFUNC resolver.

gcc/testsuite/

        PR target/85345
        * gcc.target/i386/pr85345.c: New test.
---
 gcc/cgraph.h                            |  5 +++-
 gcc/testsuite/gcc.target/i386/pr85345.c | 44 +++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.target/i386/pr85345.c

diff --git a/gcc/cgraph.h b/gcc/cgraph.h
index d1ef8408497..9e195824fcc 100644
--- a/gcc/cgraph.h
+++ b/gcc/cgraph.h
@@ -24,6 +24,8 @@ along with GCC; see the file COPYING3.  If not see
 #include "profile-count.h"
 #include "ipa-ref.h"
 #include "plugin-api.h"
+#include "stringpool.h"
+#include "attribs.h"
 
 class ipa_opt_pass_d;
 typedef ipa_opt_pass_d *ipa_opt_pass;
@@ -2894,7 +2896,8 @@ cgraph_node::only_called_directly_or_aliased_p (void)
          && !DECL_STATIC_CONSTRUCTOR (decl)
          && !DECL_STATIC_DESTRUCTOR (decl)
          && !used_from_object_file_p ()
-         && !externally_visible);
+         && !externally_visible
+         && !lookup_attribute ("ifunc", DECL_ATTRIBUTES (decl)));
 }
 
 /* Return true when function can be removed from callgraph
diff --git a/gcc/testsuite/gcc.target/i386/pr85345.c 
b/gcc/testsuite/gcc.target/i386/pr85345.c
new file mode 100644
index 00000000000..63f771294ad
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr85345.c
@@ -0,0 +1,44 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fcf-protection -mcet" } */
+/* { dg-final { scan-assembler-times {\mendbr} 4 } } */
+
+int resolver_fn = 0;
+int resolved_fn = 0;
+
+static inline void
+do_it_right_at_runtime_A (void)
+{
+  resolved_fn++;
+}
+
+static inline void
+do_it_right_at_runtime_B (void)
+{
+  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")));
+
+extern int r;
+static void (*resolve_do_it_right_at_runtime (void)) (void)
+{
+  resolver_fn++;
+
+  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 ()
+{
+  do_it_right_at_runtime ();
+  return 0;
+}
-- 
2.14.3