Convert __builtin_expect to __glibc_(un)likely throughout elf/.zack/elf-builtin-expect-conversion

In the previous patch I didn't change a use of __builtin_expect to
__glibc_(un)likely that happened to be right next to the code I was
actually working on; Andreas asked why not, and I said that there were
a bunch more uses of __builtin_expect in that file and I would convert
them all in a separate patch.  This is that patch, converting all of
elf/.

I would appreciate someone checking over this patch very carefully
indeed.  In a whole bunch of places, __builtin_expect was used in a
way that did not map mechanically to the newer convention.  The test
suite caught one mistake; I'm not confident I didn't make any more.

Writing this patch gave me a deeper appreciation for why we _want_ to
switch to __glibc_(un)likely, but also for how difficult it can be.  I
now think that people should _not_ be asked to change existing uses of
__builtin_expect in a patch whose purpose is something else.

	* elf/dl-addr.c, elf/dl-cache.c, elf/dl-close.c, elf/dl-deps.c
	* elf/dl-environ.c, elf/dl-error-skeleton.c, elf/dl-fini.c
	* elf/dl-fptr.c, elf/dl-init.c, elf/dl-libc.c, elf/dl-minimal.c
	* elf/dl-open.c, elf/dl-reloc.c, elf/dl-runtime.c
	* elf/dl-sysdep.c, elf/dl-tls.c, elf/dl-version.c, elf/ldconfig.c
	* elf/rtld.c: Replace __builtin_expect with __glibc_likely or
	__glibc_unlikely, as appropriate, throughout.

1 files changed, 2 insertions, 2 deletions

diff --git a/elf/dl-open.c b/elf/dl-open.c
index 9dde4acfbc..ba4d97a5eb 100644
--- a/elf/dl-open.c
+++ b/elf/dl-open.c
@@ -442,7 +442,7 @@ dl_open_worker (void *a)
 	 therefore is not yet initialized.  */
       else if (! imap->l_init_called
 	       /* Only if the module defines thread local data.  */
-	       && __builtin_expect (imap->l_tls_blocksize > 0, 0))
+	       && __glibc_unlikely (imap->l_tls_blocksize > 0))
 	{
 	  /* Now that we know the object is loaded successfully add
 	     modules containing TLS data to the slot info table.  We
@@ -463,7 +463,7 @@ dl_open_worker (void *a)
     }
 
   /* Bump the generation number if necessary.  */
-  if (any_tls && __builtin_expect (++GL(dl_tls_generation) == 0, 0))
+  if (any_tls && __glibc_unlikely (++GL(dl_tls_generation) == 0))
     _dl_fatal_printf (N_("\
 TLS generation counter wrapped!  Please report this."));