https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70577
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Hi.
It shows that after Honza's change, 'estimated_stmt_executions_int' return -1
for all 3 situations.
Thus 'Issued prefetch' is not printed to the dump file.
However, before Honza's patch was applied, estimated_stmt_executions_int
returns strange results for following 2 loops:
struct tail0
{
int xxx;
int yyy[2];
};
int loop0 (int n, struct tail0 *x)
{
int i, s = 0;
for (i = 0; i < n; i++)
s += x->yyy[i];
return s;
}
returns 3, however:
struct tail1
{
int xxx;
int yyy[1];
};
int loop1 (int n, struct tail1 *x)
{
int i, s = 0;
for (i = 0; i < n; i++)
s += x->yyy[i];
return s;
}
returns -1. Well, I would expect here to we given value 2. According to tree
dump file, both loops have exactly the same CFG.
Martin
