[Bug c/55646] New: Array of data as argument

[Bug c/55646] New: Array of data as argument

[bratsinot at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55646

             Bug #: 55646
           Summary: Array of data as argument
    Classification: Unclassified
           Product: gcc
           Version: 4.7.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: bratsinot@gmail.com


If wrote this:
> fwrite("\xAA\xBB\xCC\x0A", 1, 4, stdout);
gcc put in .data/.text section one piece of data, something like that:
> .string	"\252\273\314\n"

But if wrote this:
> fwrite((uint8_t[]){0xAA,0xBB,0xCC,0x0A}, 1, 4, stdout);
gcc will put the data bit by bit in stack, something like that:
> movb	$-86, (%rsp)
> movb	$-69, 1(%rsp)
> movb	$-52, 2(%rsp)
> movb	$10, 3(%rsp)

P.S. Build with -O3

[Bug c/55646] Array of data as argument

[bratsinot at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55646

--- Comment #1 from Alexander <bratsinot at gmail dot com> 2012-12-11 14:07:21 UTC ---
If write this:
> static const uint8_t qwe[] = {0xAA,0xBB,0xCC,0x0A};
> fwrite(qwe, 1, 4, stdout);
gcc put data in one piece, something like that:
> qwe.2230:
> 	.byte	-86
> 	.byte	-69
> 	.byte	-52
> 	.byte	10

P.S.S. Sorry for my mistakes, English not my native language.

[Bug c/55646] Array of data as argument

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55646

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |mpolacek at gcc dot gnu.org
         Resolution|---                         |INVALID

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Doesn't look like a bug.