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From: bkoz@gcc.gnu.org To: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, wesslen@users.sourceforge.net Subject: Re: libstdc++/6732: misaligned objects created by new Date: Wed, 03 Jul 2002 22:51:00 -0000 [thread overview] Message-ID: <20020704055150.16219.qmail@sources.redhat.com> (raw) Synopsis: misaligned objects created by new State-Changed-From-To: open->analyzed State-Changed-By: bkoz State-Changed-When: Wed Jul 3 22:51:48 2002 State-Changed-Why: I'm not quite convinced that this is a C++ library problem. It seems like "C" also has the same issue. Note that gcc-2.96, others also have the same behavior. #include <iostream> struct vec4 { float x, y, z, w; } __attribute__((__aligned__(16))); int main() { std::allocator<vec4> a; for (int i = 0; i < 10; ++i) { vec4* p = new vec4; std::cerr << reinterpret_cast<void*>(p) << " "; std::cerr << reinterpret_cast<std::size_t>(p) % 16 << " "; std::cerr << std::endl; } for (int i = 0; i < 10; ++i) { vec4* p = reinterpret_cast<vec4*>(malloc(sizeof(vec4))); std::cerr << reinterpret_cast<void*>(p) << " "; std::cerr << reinterpret_cast<std::size_t>(p) % 16 << " "; std::cerr << std::endl; } } http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6732
next reply other threads:[~2002-07-04 5:51 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-07-03 22:51 bkoz [this message] -- strict thread matches above, loose matches on Subject: below -- 2002-08-03 13:46 Gabriel Dos Reis 2002-08-03 13:27 bkoz 2002-05-27 5:36 bkoz 2002-05-20 5:46 Daniel Wesslén 2002-05-20 5:21 paolo 2002-05-20 5:16 wesslen
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