procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

* runtime/memory.c (xmallocarray): Avoid division for the common case.

Browse source 
From-SVN: r213593
This commit is contained in:
Jakub Jelinek 2014-08-04 17:46:33 +02:00 • committed by Jakub Jelinek
parent 3696163cb4
commit 62c986afde
2 changed files with 7 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
libgfortran/ChangeLog
View file

@ -1,3 +1,7 @@
2014-08-04 Jakub Jelinek <jakub@redhat.com>
* runtime/memory.c (xmallocarray): Avoid division for the common case.
2014-07-20 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/61632

4
libgfortran/runtime/memory.c
View file

@ -56,7 +56,9 @@ xmallocarray (size_t nmemb, size_t size)
if (!nmemb || !size)
size = nmemb = 1;
else if (nmemb > SIZE_MAX / size)
#define HALF_SIZE_T (((size_t) 1) << (__CHAR_BIT__ * sizeof (size_t) / 2))
else if (__builtin_expect ((nmemb | size) >= HALF_SIZE_T, 0)
&& nmemb > SIZE_MAX / size)
{
errno = ENOMEM;
os_error ("Integer overflow in xmallocarray");