https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71824
--- Comment #13 from Leandro Nini <drfiemost at email dot it> ---
I've applied the patch to the 6.3.1 20170202 snapshot and the former test
compiles but this one triggers the same error:
typedef struct { float x1; } bx;
typedef struct {
int w;
short o;
} T2P;
T2P a;
int b;
void fn2();
void fn3(bx*,short);
void fn1() {
unsigned i = 0;
int c;
bx *d;
bx **h;
if (b == 0) {
fn2();
return;
}
for (; c; c++)
for (; i < 100; i++) {
d = h[i];
d->x1 = a.w;
}
for (; i < 100; i++) {
d = h[i];
d->x1 = a.w;
}
if (a.o)
for (; b;)
fn3(d, a.o);
}
/opt/gcc/bin/gcc -O2 -floop-interchange bug71824_v2.c
bug71824_v2.c: In function ‘fn1’:
bug71824_v2.c:10:6: internal compiler error: in add_loop_constraints, at
graphite-sese-to-poly.c:931
void fn1() {
^~~
0x17540ea add_loop_constraints
../../gcc/graphite-sese-to-poly.c:931
0x1754538 build_iteration_domains
../../gcc/graphite-sese-to-poly.c:1001
0x17546b5 build_iteration_domains
../../gcc/graphite-sese-to-poly.c:1040
0x17553ae build_poly_scop(scop*)
../../gcc/graphite-sese-to-poly.c:1364
0x1739ee5 graphite_transform_loops()
../../gcc/graphite.c:319
0x1739f87 graphite_transforms
../../gcc/graphite.c:356
0x173a0ad execute
../../gcc/graphite.c:433
