This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug c/34968] New: ICE: verify_ssa fails when optimization trigonometric code
- From: "dougkwan at google dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 25 Jan 2008 04:02:17 -0000
- Subject: [Bug c/34968] New: ICE: verify_ssa fails when optimization trigonometric code
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
I got an internal compiler error when compiling the following. The function
my_atan is actaully derived from aton expanded from a C libray header. Other
then its name, it is almost identical to atan().
dougkwan@f666g:~/delta-2006.08.03/verify_ssa$ ./gcc -O2 PJ_geos.4.c
PJ_geos.4.c: In function 'e_forward':
PJ_geos.4.c:22: error: definition in block 2 follows the use
for SSA_NAME: result_9 in statement:
sincostmp.17_15 = __builtin_cexpi (result_9);
PJ_geos.4.c:22: internal compiler error: verify_ssa failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
--------------------
extern double hypot (double, double);
extern double cos (double);
extern double sin (double);
double
my_atan (double x)
{
register double result;
asm volatile ("fld1; fpatan"
: "=t" (result)
: "0" (x)
: "st(1)");
return result;
}
typedef struct {
double phi;
} LP;
void
e_forward(LP lp, double x)
{
lp.phi = my_atan (x);
x = hypot(cos (lp.phi), sin (lp.phi));
}
---------------------
--
Summary: ICE: verify_ssa fails when optimization trigonometric
code
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dougkwan at google dot com
GCC build triplet: i686-unknown-linux-gnu
GCC host triplet: i686-unknown-linux-gnu
GCC target triplet: i686-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34968