public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c/39194] New: options -O3 and -msse does not cooperate ?
@ 2009-02-14 18:49 oystein at gnubg dot org
2009-02-14 19:24 ` [Bug target/39194] " rguenth at gcc dot gnu dot org
2009-02-16 7:41 ` ubizjak at gmail dot com
0 siblings, 2 replies; 3+ messages in thread
From: oystein at gnubg dot org @ 2009-02-14 18:49 UTC (permalink / raw)
To: gcc-bugs
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 3233 bytes --]
Hi,
I try the following code:
#define MAX_N 40
#define MAX_R 25
#ifndef FALSE
#define FALSE 0
#define TRUE 1
#endif
static unsigned int bin_coeff_tab[ MAX_N ][ MAX_R ];
static int is_calculated = FALSE;
static void
bin_coeff_init( void )
{
int i, j;
for( i = 0; i < MAX_N; i++ )
bin_coeff_tab[ i ][ 0 ] = i + 1;
for( j = 1; j < MAX_R; j++ )
bin_coeff_tab[ 0 ][ j ] = 0;
for( i = 1; i < MAX_N; i++ )
for( j = 1; j < MAX_R; j++ )
bin_coeff_tab[ i ][ j ] = bin_coeff_tab[ i - 1 ][ j - 1 ] +
bin_coeff_tab[ i - 1 ][ j ];
is_calculated = TRUE;
}
int main()
{
bin_coeff_init();
return 0;
}
(There is no header file included, so I won't include the .i file)
If I try to compile this with both -O3 and -msse, I get a segmentation fault.
> gcc --version
gcc (GCC) 4.3.0 20080305 (alpha-testing) mingw-20080502
the assembler code file becomes:
.file "mytest.c"
.def ___main; .scl 2; .type 32; .endef
.text
.p2align 2,,3
.globl _main
.def _main; .scl 2; .type 32; .endef
_main:
leal 4(%esp), %ecx
andl $-16, %esp
pushl -4(%ecx)
pushl %ebp
movl %esp, %ebp
pushl %esi
pushl %ebx
pushl %ecx
subl $12, %esp
call ___main
movl $_bin_coeff_tab, %edx
xorl %eax, %eax
.p2align 2,,3
L2:
incl %eax
movl %eax, (%edx)
addl $100, %edx
cmpl $40, %eax
jne L2
movl $0, _bin_coeff_tab+4
movl $0, _bin_coeff_tab+8
movl $0, _bin_coeff_tab+12
xorps %xmm0, %xmm0
movaps %xmm0, _bin_coeff_tab+16
movaps %xmm0, _bin_coeff_tab+32
movaps %xmm0, _bin_coeff_tab+48
movaps %xmm0, _bin_coeff_tab+64
movaps %xmm0, _bin_coeff_tab+80
movl $0, _bin_coeff_tab+96
movl $1, %esi
.p2align 2,,3
L3:
leal (%esi,%esi,4), %eax
leal (%eax,%eax,4), %eax
leal _bin_coeff_tab-100(,%eax,4), %edx
leal _bin_coeff_tab+4(,%eax,4), %ebx
movl $1, %ecx
.p2align 2,,3
L4:
movl 4(%edx), %eax
addl (%edx), %eax
movl %eax, (%ebx)
incl %ecx
addl $4, %edx
addl $4, %ebx
cmpl $25, %ecx
jne L4
incl %esi
cmpl $40, %esi
jne L3
movl $1, _is_calculated
xorl %eax, %eax
addl $12, %esp
popl %ecx
popl %ebx
popl %esi
leave
leal -4(%ecx), %esp
ret
.lcomm _is_calculated,16
.lcomm _bin_coeff_tab,4000
Best regards,
-Øystein
--
Summary: options -O3 and -msse does not cooperate ?
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: oystein at gnubg dot org
GCC host triplet: windows (mingw)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39194
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/39194] options -O3 and -msse does not cooperate ?
2009-02-14 18:49 [Bug c/39194] New: options -O3 and -msse does not cooperate ? oystein at gnubg dot org
@ 2009-02-14 19:24 ` rguenth at gcc dot gnu dot org
2009-02-16 7:41 ` ubizjak at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-02-14 19:24 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from rguenth at gcc dot gnu dot org 2009-02-14 19:24 -------
I suppose _bin_coeff_tab is not properly aligned. Maybe PE support is not
properly honoring DECL_ALIGN. Please try also GCC 4.3.3 which has many
bugfixes compared to 4.3.0.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |target
GCC host triplet|windows (mingw) |
GCC target triplet| |mingw32-*-*
Keywords| |wrong-code
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39194
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/39194] options -O3 and -msse does not cooperate ?
2009-02-14 18:49 [Bug c/39194] New: options -O3 and -msse does not cooperate ? oystein at gnubg dot org
2009-02-14 19:24 ` [Bug target/39194] " rguenth at gcc dot gnu dot org
@ 2009-02-16 7:41 ` ubizjak at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: ubizjak at gmail dot com @ 2009-02-16 7:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from ubizjak at gmail dot com 2009-02-16 07:41 -------
You can workaround this generic PE/COFF problem using -fno-common.
*** This bug has been marked as a duplicate of 37216 ***
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39194
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2009-02-16 7:41 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-02-14 18:49 [Bug c/39194] New: options -O3 and -msse does not cooperate ? oystein at gnubg dot org
2009-02-14 19:24 ` [Bug target/39194] " rguenth at gcc dot gnu dot org
2009-02-16 7:41 ` ubizjak at gmail dot com
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).