Small optimization of alloca handling.

diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index d4a1deb..30631dc 100644 (file)
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,3 +1,8 @@
+2010-09-03  Ulrich Drepper  <drepper@redhat.com>
+
+       * sysdeps/pthread/allocalim.h (__libc_use_alloca): Expect blocks are
+       small.
+
 2010-08-10  Dinakar Guniguntala  <dino@in.ibm.com>
            Stefan Hajnoczi  <stefanha@linux.vnet.ibm.com>
 

diff --git a/nptl/sysdeps/pthread/allocalim.h b/nptl/sysdeps/pthread/allocalim.h
index f13c3a3..8265db1 100644 (file)
--- a/nptl/sysdeps/pthread/allocalim.h
+++ b/nptl/sysdeps/pthread/allocalim.h
@@ -1,5 +1,5 @@
 /* Determine whether block of given size can be allocated on the stack or not.
-   Copyright (C) 2002, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2006, 2010 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -26,5 +26,5 @@ __always_inline
 __libc_use_alloca (size_t size)
 {
   return (__builtin_expect (size <= PTHREAD_STACK_MIN / 4, 1)
-         || __libc_alloca_cutoff (size));
+         || __builtin_expect (__libc_alloca_cutoff (size), 1));
 }