Hi Andrew,
Thanks for your explain! And sorry for later reply.
Andrew MacLeod writes:
> On 9/14/23 22:07, Jiufu Guo wrote:
>>>
>>> undefined is a perfectly acceptable range. It can be used to
>>> represent either values which has not been initialized, or more
>>> frequently it identifies val
On 9/14/23 22:07, Jiufu Guo wrote:
undefined is a perfectly acceptable range. It can be used to
represent either values which has not been initialized, or more
frequently it identifies values that cannot occur due to
conflicting/unreachable code. VARYING means it can be any range,
UNDEFINED
Hi,
Andrew MacLeod writes:
> On 9/12/23 21:42, Jiufu Guo wrote:
>> Hi,
>>
>> Richard Biener writes:
>>
>>> On Thu, 7 Sep 2023, Jiufu Guo wrote:
>>>
Hi,
As discussed in PR111303:
For pattern "(X + C) / N": "div (plus@3 @0 INTEGER_CST@1) INTEGER_CST@2)",
Even if "X
On 9/12/23 21:42, Jiufu Guo wrote:
Hi,
Richard Biener writes:
On Thu, 7 Sep 2023, Jiufu Guo wrote:
Hi,
As discussed in PR111303:
For pattern "(X + C) / N": "div (plus@3 @0 INTEGER_CST@1) INTEGER_CST@2)",
Even if "X" has value-range and "X + C" does not overflow, "@3" may still
be undefi
Hi,
Richard Biener writes:
> On Thu, 7 Sep 2023, Jiufu Guo wrote:
>
>> Hi,
>>
>> As discussed in PR111303:
>>
>> For pattern "(X + C) / N": "div (plus@3 @0 INTEGER_CST@1) INTEGER_CST@2)",
>> Even if "X" has value-range and "X + C" does not overflow, "@3" may still
>> be undefined. Like below
On Thu, 7 Sep 2023, Jiufu Guo wrote:
> Hi,
>
> As discussed in PR111303:
>
> For pattern "(X + C) / N": "div (plus@3 @0 INTEGER_CST@1) INTEGER_CST@2)",
> Even if "X" has value-range and "X + C" does not overflow, "@3" may still
> be undefined. Like below example:
>
> _3 = _2 + -5;
> if (0 != 0)
Hi,
As discussed in PR111303:
For pattern "(X + C) / N": "div (plus@3 @0 INTEGER_CST@1) INTEGER_CST@2)",
Even if "X" has value-range and "X + C" does not overflow, "@3" may still
be undefined. Like below example:
_3 = _2 + -5;
if (0 != 0)
goto ; [34.00%]
else
goto ; [66.00%]
;; succ:
