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From: "bratsinot at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/55646] New: Array of data as argument Date: Tue, 11 Dec 2012 14:03:00 -0000 [thread overview] Message-ID: <bug-55646-4@http.gcc.gnu.org/bugzilla/> (raw) 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
next reply other threads:[~2012-12-11 14:03 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-12-11 14:03 bratsinot at gmail dot com [this message] 2012-12-11 14:07 ` [Bug c/55646] " bratsinot at gmail dot com 2015-01-20 10:32 ` mpolacek at gcc dot gnu.org
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