PATCH: Add ifunc-main IFUNC tests

[H.J. Lu]

On Thu, Nov 20, 2014 at 10:50:31AM -0800, H.J. Lu wrote:
> Hi,
> 
> I checked in this patch to add ifunc-main IFUNC tests.
> 
> H.J.
> ---
> diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog
> index f8478bd..555d6bf 100644
> --- a/ld/testsuite/ChangeLog
> +++ b/ld/testsuite/ChangeLog
> @@ -1,5 +1,12 @@
>  2014-11-20  H.J. Lu  <hongjiu.lu@intel.com>
>  
> +	* ld-ifunc/ifunc.exp: Run ifunc-main.
> +	* ld-ifunc/ifunc-lib.c: New file.
> +	* ld-ifunc/ifunc-main.c: Likewise.
> +	* ld-ifunc/ifunc-main.out: Likewise.
> +
> +2014-11-20  H.J. Lu  <hongjiu.lu@intel.com>
> +
>  	* lib/ld-lib.exp (check_ifunc_available): New.
>  	* ld-ifunc/ifunc.exp: Run IFUNC run-time tests only if IFUNC

I checked in this patch to make sure that compiler won't optimize out
loading function into a local variable.

H.J.
--
diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog
index 555d6bf..63f145e 100644
--- a/ld/testsuite/ChangeLog
+++ b/ld/testsuite/ChangeLog
@@ -1,5 +1,10 @@
 2014-11-20  H.J. Lu  <hongjiu.lu@intel.com>
 
+	* ld-ifunc/ifunc-main.c (get_bar): New function.
+	(main): Use it.
+
+2014-11-20  H.J. Lu  <hongjiu.lu@intel.com>
+
 	* ld-ifunc/ifunc.exp: Run ifunc-main.
 	* ld-ifunc/ifunc-lib.c: New file.
 	* ld-ifunc/ifunc-main.c: Likewise.
diff --git a/ld/testsuite/ld-ifunc/ifunc-main.c b/ld/testsuite/ld-ifunc/ifunc-main.c
index a320cfb..61e9934 100644
--- a/ld/testsuite/ld-ifunc/ifunc-main.c
+++ b/ld/testsuite/ld-ifunc/ifunc-main.c
@@ -3,12 +3,21 @@
 extern int foo(void);
 extern int bar(void);
 
-int (*foo_ptr)(void) = foo;
+typedef int (*func_p) (void);
+
+func_p foo_ptr = foo;
+
+func_p
+__attribute__((noinline))
+get_bar (void)
+{
+  return bar;
+}
 
 int
 main (void)
 {
-  int (*bar_ptr)(void) = bar;
+  func_p bar_ptr = get_bar ();
   if (bar_ptr != bar)
     __builtin_abort ();
   if (bar_ptr() != -1)