On Mon, Dec 02, 2013 at 04:01:05PM +0100, Richard Biener wrote:
> On Wed, Mar 13, 2013 at 1:57 PM, Marek Polacek <pola...@redhat.com> wrote:
> > Ping.
>
> Ok. (yay, oldest patch in my review queue ...)
;) thanks. Just to be sure, did you mean to ok this patch (that is,
the one with HOST_BITS_PER_INT)?
Bootstrap/regtest in progress.
2013-12-02 Marek Polacek <pola...@redhat.com>
PR middle-end/56344
* calls.c (expand_call): Disallow passing huge arguments
by value.
--- gcc/calls.c.mp4 2013-12-02 17:12:18.621057873 +0100
+++ gcc/calls.c 2013-12-02 17:32:35.523684716 +0100
@@ -3047,6 +3047,15 @@ expand_call (tree exp, rtx target, int i
{
rtx before_arg = get_last_insn ();
+ /* We don't allow passing huge (> 2^30 B) arguments
+ by value. It would cause an overflow later on. */
+ if (adjusted_args_size.constant
+ >= (1 << (HOST_BITS_PER_INT - 1)))
+ {
+ sorry ("passing too large argument on stack");
+ continue;
+ }
+
if (store_one_arg (&args[i], argblock, flags,
adjusted_args_size.var != 0,
reg_parm_stack_space)
Marek
