------- Additional Comments From Thomas dot Koenig at online dot de 2005-01-18
10:38 -------
A single complex float division is enough to trigger the error.
Reduced test case:
$ cat cdivide.c
#include <stdio.h>
#include <math.h>
#include <complex.h>
int main()
{
float complex a,b,c;
c = a/b;
}
$ gcc -E cdivide.c > cdivide.i
$ gdb ~/libexec/gcc/ia64-unknown-linux-gnu/4.0.0/cc1
GNU gdb Red Hat Linux (6.1post-1.20040607.52rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
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This GDB was configured as "ia64-redhat-linux-gnu"...Using host libthread_db
library "/lib/tls/libthread_db.so.1".
(gdb) b toplev_main
Breakpoint 1 at 0x4000000000630d42: file ../../gcc-4.0-20050116/gcc/toplev.c,
line 1589.
(gdb) r cdivide.i
Starting program: /home/zfkts/libexec/gcc/ia64-unknown-linux-gnu/4.0.0/cc1
cdivide.i
Breakpoint 1, toplev_main (argc=2, argv=0x60000fffffffa768)
at ../../gcc-4.0-20050116/gcc/toplev.c:1589
1589 p = argv0 + strlen (argv0);
(gdb) set flag_complex_divide_method=1
(gdb) c
Continuing.
main
cdivide.c: In function 'main':
cdivide.c:9: internal compiler error: in purge_dead_edges, at cfgrtl.c:2460
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
Program exited with code 01.
(gdb)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19486
