Re: [PATCH] vectorizing conditional expressions (PR tree-optimization/65947)

[Alan Hayward <alan dot hayward at arm dot com>]

On 18/09/2015 14:53, "Alan Hayward" <Alan.Hayward@arm.com> wrote:

>
>
>On 18/09/2015 14:26, "Alan Lawrence" <Alan.Lawrence@arm.com> wrote:
>
>>On 18/09/15 13:17, Richard Biener wrote:
>>>
>>> Ok, I see.
>>>
>>> That this case is already vectorized is because it implements MAX_EXPR,
>>> modifying it slightly to
>>>
>>> int foo (int *a)
>>> {
>>>    int val = 0;
>>>    for (int i = 0; i < 1024; ++i)
>>>      if (a[i] > val)
>>>        val = a[i] + 1;
>>>    return val;
>>> }
>>>
>>> makes it no longer handled by current code.
>>>
>>
>>Yes. I believe the idea for the patch is to handle arbitrary expressions
>>like
>>
>>int foo (int *a)
>>{
>>    int val = 0;
>>    for (int i = 0; i < 1024; ++i)
>>      if (some_expression (i))
>>        val = another_expression (i);
>>    return val;
>>}
>
>Yes, thatâs correct. Hopefully my new test cases should cover everything.
>

Attached is a new version of the patch containing all the changes
requested by Richard.


Thanks,
Alan.

Attachment: 0001-Support-for-vectorizing-conditional-expressions.patch
Description: Binary data