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From: bangerth@dealii.org To: dann@godzilla.ics.uci.edu, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org Subject: Re: c/2480: aliasing problem with global structures Date: Fri, 07 Mar 2003 02:19:00 -0000 [thread overview] Message-ID: <20030307021907.31526.qmail@sources.redhat.com> (raw) Synopsis: aliasing problem with global structures State-Changed-From-To: open->analyzed State-Changed-By: bangerth State-Changed-When: Fri Mar 7 02:19:07 2003 State-Changed-Why: Indeed. This odd behavior persists in 3.2, 3.3 and present mainline. Annoying. As noted, this is even better visible in x86 assembler: bar: pushl %ebp movl %esp,%ebp movl ex1,%eax movb $1,(%eax) movl ex1,%eax <-- this is the duplicate reload movl $2,4(%eax) movb $3,8(%eax) movl %ebp,%esp popl %ebp ret foo: pushl %ebp movl %esp,%ebp movl 8(%ebp),%eax movb $1,(%eax) movl $2,4(%eax) movb $3,8(%eax) movl %ebp,%esp popl %ebp ret W. http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=2480
next reply other threads:[~2003-03-07 2:19 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-03-07 2:19 bangerth [this message] -- strict thread matches above, loose matches on Subject: below -- 2003-05-03 23:26 Dan Nicolaescu 2001-04-03 16:56 Dan Nicolaescu
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