https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84478
Bug ID: 84478
Summary: [8 Regression] pdftex miscompilation on i386
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
long poolptr;
unsigned char *strpool;
static const char *poolfilearr[] = {
"mu",
#define A "",
#define B A A A A A A A A A A
#define C B B B B B B B B B B
#define D C C C C C C C C C C
D C C C C C C C B B B A
((void *)0)
};
__attribute__((noipa)) long
makestring (void)
{
return 0;
}
__attribute__((noipa))
int
loadpoolstrings (long spare_size)
{
const char *s;
long g = 0;
int i = 0, j = 0;
while ((s = poolfilearr[j++]))
{
int l = __builtin_strlen (s);
i += l;
if (i >= spare_size) return 0;
while (l-- > 0) strpool[poolptr++] = *s++;
g = makestring ();
}
return g;
}
int
main ()
{
poolptr = 0;
strpool = __builtin_malloc (1000);
asm volatile ("" : : : "memory");
volatile int r = loadpoolstrings (1000);
__builtin_free (strpool);
return 0;
}
is miscompiled with -O2 -m32 starting with r256477.
