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Small optimization of alloca handling.

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This commit is contained in:
Ulrich Drepper 2010-09-03 04:42:44 -07:00
parent 0959ffc97b
commit 4ac42e193f
2 changed files with 7 additions and 2 deletions
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5
nptl/ChangeLog
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@ -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> 2010-08-10 Dinakar Guniguntala <dino@in.ibm.com>
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

4
nptl/sysdeps/pthread/allocalim.h
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@ -1,5 +1,5 @@
/* Determine whether block of given size can be allocated on the stack or not. /* 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. This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or 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) __libc_use_alloca (size_t size)
{ {
return (__builtin_expect (size <= PTHREAD_STACK_MIN / 4, 1) return (__builtin_expect (size <= PTHREAD_STACK_MIN / 4, 1)
|| __libc_alloca_cutoff (size)); || __builtin_expect (__libc_alloca_cutoff (size), 1));
} }