[Bug target/45843] [4.3/4.4/4.5/4.6 Regression] __builtin_va_arg overwrites into adjacent stack location

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45843

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-09-30 
20:21:33 UTC ---
Author: jakub
Date: Thu Sep 30 20:21:28 2010
New Revision: 164766

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=164766
Log:
    PR target/45843
    * config/i386/i386.c (ix86_gimplify_va_arg): Use
    INTVAL (XEXP (slot, 1)) as prev_size.

    * g++.dg/torture/pr45843.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr45843.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-09-30 
20:24:59 UTC ---
Author: jakub
Date: Thu Sep 30 20:24:54 2010
New Revision: 164767

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=164767
Log:
    PR target/45843
    * config/i386/i386.c (ix86_gimplify_va_arg): Use
    INTVAL (XEXP (slot, 1)) as prev_size.

    * g++.dg/torture/pr45843.C: New test.

Added:
    branches/gcc-4_5-branch/gcc/testsuite/g++.dg/torture/pr45843.C
Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/config/i386/i386.c
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog