[Bug tree-optimization/27549] New: [4.1 Regression] ICE in coalesce_abnormal_edges
jakub at gcc dot gnu dot org
gcc-bugzilla@gcc.gnu.org
Thu May 11 08:44:00 GMT 2006
typedef __SIZE_TYPE__ size_t;
struct E
{
virtual ~E () {}
virtual size_t e () const = 0;
virtual void f (char *x) const = 0;
};
struct F : public E
{
virtual ~F () {}
virtual size_t e () const { return 0; }
virtual void f (char *x) const { *x = '\0'; }
};
struct S
{
S () { a = new char[32]; b = 32; c = 0; a[0] = 0; }
void s (const char *x, size_t y) { v (c + y + 1); __builtin_memcpy(a + c, x,
y); c += y; a[c] = '\0'; }
void s (const E *x) { size_t l = x->e(); v (c + l + 1); x->f (a + c); c += l;
}
const char *t () { return a; }
void v (size_t n)
{
if (b >= n) return;
size_t b2 = b;
char *a2 = a;
for (;;)
{
b *= 2;
if (b >= n)
break;
}
a = new char[b];
if (b2)
{
__builtin_memcpy(a, a2, c);
a2[0] = 0;
for (size_t i = 1; i < b2; i++)
a2[i] = a2[i - 1];
delete[] a2;
}
}
~S ()
{
if (b)
{
a[0] = 0;
for (size_t i = 1; i < b; i++)
a[i] = a[i - 1];
}
delete[] a;
}
char * a;
size_t b, c;
};
const char *p;
size_t q;
const F u;
const char *
foo ()
{
S s;
s.s (p, q);
s.s (&u);
return s.t ();
}
ICEs at -O{1,2,3} in coalesce_abnormal_edges, at least on x86_64 and i386
linux.
--
Summary: [4.1 Regression] ICE in coalesce_abnormal_edges
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jakub at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27549
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