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* [Bug target/13623] New: gcc seems to be allocating more space than necessary.
@ 2004-01-09 0:35 anupamk at speakeasy dot net
2004-01-09 0:53 ` [Bug target/13623] " ozabluda at yahoo dot com
2004-01-09 2:44 ` pinskia at gcc dot gnu dot org
0 siblings, 2 replies; 3+ messages in thread
From: anupamk at speakeasy dot net @ 2004-01-09 0:35 UTC (permalink / raw)
To: gcc-bugs
i have a simple test program:
typedef struct
{
int a,b,c,d;
int x[10];
} s;
void foo(void)
{ s x; }
which is compiled without any flags i.e. 'gcc -c foo.c' if i look at the
generated code, it looks like this:
00000000 <foo>:
0: 55 push %ebp
1: 89 e5 mov %esp,%ebp
3: 83 ec 48 sub $0x48,%esp
6: c9 leave
7: c3 ret
which is 72 bytes ! where the structure size (as reported by sizeof) is 56 bytes
only.
thank you
kind regards
anupam
here is the output from gcc -v :
Reading specs from /usr/lib/gcc-lib/i686-pc-linux-gnu/3.2.3/specs
Configured with: /var/tmp/portage/gcc-3.2.3-r2/work/gcc-3.2.3/configure
--prefix=/usr --bindir=/usr/i686-pc-linux-gnu/gcc-bin/3.2
--includedir=/usr/lib/gcc-lib/i686-pc-linux-gnu/3.2.3/include
--datadir=/usr/share/gcc-data/i686-pc-linux-gnu/3.2
--mandir=/usr/share/gcc-data/i686-pc-linux-gnu/3.2/man
--infodir=/usr/share/gcc-data/i686-pc-linux-gnu/3.2/info --enable-shared
--host=i686-pc-linux-gnu --target=i686-pc-linux-gnu --with-system-zlib
--enable-languages=c,c++,f77,objc,java --enable-threads=posix --enable-long-long
--disable-checking --enable-cstdio=stdio --enable-clocale=generic
--enable-__cxa_atexit --enable-version-specific-runtime-libs
--with-gxx-include-dir=/usr/lib/gcc-lib/i686-pc-linux-gnu/3.2.3/include/g++-v3
--with-local-prefix=/usr/local --enable-shared --enable-nls
--without-included-gettext
Thread model: posix
gcc version 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r2, propolice)
/usr/lib/gcc-lib/i686-pc-linux-gnu/3.2.3/cc1 -lang-c -v -D__GNUC__=3
-D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=3 -D__GXX_ABI_VERSION=102 -D__ELF__
-Dunix -D__gnu_linux__ -Dlinux -D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__
-D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -Acpu=i386
-Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__ -D__tune_pentiumpro__
ds.c -quiet -dumpbase ds.c -version -o /tmp/ccbdcwDA.s
GNU CPP version 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r2, propolice) (cpplib)
(i386 Linux/ELF)
GNU C version 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r2, propolice)
(i686-pc-linux-gnu)
compiled by GNU C version 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r2,
propolice).
--
Summary: gcc seems to be allocating more space than necessary.
Product: gcc
Version: 3.2.3
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: anupamk at speakeasy dot net
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: gcc version 3.2.3 20030422
GCC host triplet: i686 Intel(R) Pentium(R) 4 CPU
GCC target triplet: x86 intel
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13623
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/13623] gcc seems to be allocating more space than necessary.
2004-01-09 0:35 [Bug target/13623] New: gcc seems to be allocating more space than necessary anupamk at speakeasy dot net
@ 2004-01-09 0:53 ` ozabluda at yahoo dot com
2004-01-09 2:44 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: ozabluda at yahoo dot com @ 2004-01-09 0:53 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |ozabluda at yahoo dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13623
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/13623] gcc seems to be allocating more space than necessary.
2004-01-09 0:35 [Bug target/13623] New: gcc seems to be allocating more space than necessary anupamk at speakeasy dot net
2004-01-09 0:53 ` [Bug target/13623] " ozabluda at yahoo dot com
@ 2004-01-09 2:44 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-01-09 2:44 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-01-09 02:44 -------
This is a dup of bug 9624.
*** This bug has been marked as a duplicate of 9624 ***
*** This bug has been marked as a duplicate of 9624 ***
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13623
^ permalink raw reply [flat|nested] 3+ messages in thread
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2004-01-09 0:35 [Bug target/13623] New: gcc seems to be allocating more space than necessary anupamk at speakeasy dot net
2004-01-09 0:53 ` [Bug target/13623] " ozabluda at yahoo dot com
2004-01-09 2:44 ` pinskia at gcc dot gnu dot org
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