Small optimization of alloca handling.

git-mirror · Sep 3, 2010 · 4ac42e1 · 4ac42e1
1 parent 0959ffc
commit 4ac42e1
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Showing 2 changed files with 7 additions and 2 deletions.
diff --git 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
@@ -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));
 }