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From: Marius Bernklev <gcc-bugs@gcc.gnu.org>
To: bangerth@dealii.org
Cc: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org,
gcc-gnats@gcc.gnu.org
Subject: Re: c/9540: C99 initializers generate lots of code
Date: Mon, 03 Feb 2003 12:34:00 -0000 [thread overview]
Message-ID: <3cf8ywxpmpg.fsf@trebisacce.ifi.uio.no> (raw)
In-Reply-To: <20030202221557.18238.qmail@sources.redhat.com> (bangerth@dealii.org's message of "2 Feb 2003 22:15:57 -0000")
bangerth@dealii.org writes:
> Synopsis: C99 initializers generate lots of code
>
> State-Changed-From-To: open->feedback
> State-Changed-By: bangerth
> State-Changed-When: Sun Feb 2 22:15:57 2003
> State-Changed-Why:
> Can you send a self-contained code example that shows this?
>
> Thanks
> Wolfgang
>
> http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9540
>
Certainly. :)
Here goes:
// Start of vector.c
#include <stdlib.h> // well, I need size_t
// imaginary garbage collector allocator
extern void *gc_malloc(size_t);
struct string {
size_t size;
size_t length;
char *restrict string;
int hash;
};
struct string *new_vector1( const size_t length ) {
struct string *const restrict result = gc_malloc( sizeof *result );
*result = (struct string) { .size = sizeof *result,
.length = length,
.string = gc_malloc( length ),
.hash = -1 };
return result;
}
struct string *new_vector2( const size_t length ) {
struct string *const restrict result = gc_malloc( sizeof *result );
result->size = sizeof *result;
result->length = length;
result->string = gc_malloc( length );
result->hash = -1;
return result;
}
---------------------------
with gcc 3.2.1 on x86, with the command line
gcc -std=c99 -S vector.c,
the code generated for new_vector1 is somewhat larger than for
new_vector2.
Marius
--
<URL: http://home.ifi.uio.no/~mariube/ >
Life sucks. Death swallows.
next prev parent reply other threads:[~2003-02-03 12:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-02 22:15 bangerth
2003-02-03 12:34 ` Marius Bernklev [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-02-03 12:36 Marius Bernklev
2003-02-02 20:16 mariube+gcc+
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