https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63914
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-11-17
Component|c |tree-optimization
CC| |trippels at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ice in set_lattice_value, |ICE in set_lattice_value,
|at tree-ssa-ccp.c:517 |at tree-ssa-ccp.c:517
Target Milestone|--- |5.0
Known to fail| |4.8.3, 4.9.2, 5.0
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
All supported gcc versions ICE:
markus@x4 test % cat bug176.c
typedef float __m128 __attribute__ ((__vector_size__ (16)));
__m128 a, d, e;
int b;
struct dt_interpolation c;
__m128
fn1 (float p1)
{
return (__attribute__ ((__vector_size__ (4 * sizeof 0))) float){ p1 };
}
__m128
fn2 (float p1)
{
return fn1 (p1);
}
struct dt_interpolation
{
int width;
};
void
fn3 (struct dt_interpolation *p1, int *p2)
{
int i = 0, n = 0;
while (i < 2 * p1->width)
n = i++;
*p2 = n;
}
void
fn4 ()
{
__m128 f;
fn3 (&c, &b);
__m128 g = fn2 (1.f / b);
e = (__m128){};
__m128 h = e;
for (int i = 0; i < 2 * c.width; i++)
{
for (; c.width;)
f = a;
h = f;
}
d = h * g;
}
markus@x4 test % gcc -std=c99 -O2 -ffast-math -c bug176.c
bug176.c: In function ‘fn4’:
bug176.c:28:1: internal compiler error: in set_lattice_value, at
tree-ssa-ccp.c:517
