On Wed, 2006-03-29 at 15:03 +0800, Tianwei Sheng wrote:
> I need the field_info to help in alias analysis. for example:
> int *p = &pair.a;
> int *q = &pair.b;
>
> then if I can set length of "*p" to 4,ofset is '0' . for "*q" to
> "8,4". also I know that p definitly points to pair.a and q points t
On Mar 29, 2006, at 12:15 AM, Tianwei Sheng wrote:
but it's my be too aggressive. as you said, you mean "base,ofst"
rule is enough,
a more safe method is "base,ofst, lenght" rule.
Right. I didn't mean to exclude length, just that I didn't expound
on the idea, as I wanted to get the simple
but it's my be too aggressive. as you said, you mean "base,ofst" rule is enough,
a more safe method is "base,ofst, lenght" rule. p still can point to
pair.b if p is update by
assignment or other ways.
we should ensure *p will never exceed the length, otherwilse it will
fail to do alias analysis.
On Mar 28, 2006, at 11:03 PM, Tianwei Sheng wrote:
I need the field_info to help in alias analysis. for example:
int *p = &pair.a;
int *q = &pair.b;
then if I can set length of "*p" to 4,ofset is '0' . for "*q" to
"8,4". also I know that p definitly points to pair.a and q points to
pair.b, then
I need the field_info to help in alias analysis. for example:
int *p = &pair.a;
int *q = &pair.b;
then if I can set length of "*p" to 4,ofset is '0' . for "*q" to
"8,4". also I know that p definitly points to pair.a and q points to
pair.b, then i can say "*p" and "*q" are not aliased with each oth
Hi all:
for the following statement, how can I get the field_id info for
the structure member
struct{
int a;
int b;
} pair;
int main()
{
int * p = &pair.a;
}
It seems that we can't get the field_id info because of address taken
operator. it treats the "&pair.a" as "&pair + ofset of a".
