On 11/21/2017 07:56 AM, Richard Biener wrote:
>>
>>
>> I considered trying to key behavior on EDGE_DFS_BACK (6->8). It'd be
>> something like don't record equivalences from a degenerate PHI where the
>> remaining edge(s) are EDGE_DFS_BACK. But I just couldn't convince
>> myself that was actually
On Mon, Nov 20, 2017 at 7:33 PM, Jeff Law wrote:
> On 11/20/2017 03:25 AM, Richard Biener wrote:
>> On Sun, Nov 19, 2017 at 9:16 PM, Jeff Law wrote:
>>> On my local branch gcc.dg/torture/pr56349.c fails by sending GCC into an
>>> infinite loop trying to simplify a self-referring statement. ie
>>>
On 11/20/2017 03:25 AM, Richard Biener wrote:
> On Sun, Nov 19, 2017 at 9:16 PM, Jeff Law wrote:
>> On my local branch gcc.dg/torture/pr56349.c fails by sending GCC into an
>> infinite loop trying to simplify a self-referring statement. ie
>> something like
>>
>> x_1 = x_1 + 10;
>>
>> That, of cou
On Sun, Nov 19, 2017 at 9:16 PM, Jeff Law wrote:
> On my local branch gcc.dg/torture/pr56349.c fails by sending GCC into an
> infinite loop trying to simplify a self-referring statement. ie
> something like
>
> x_1 = x_1 + 10;
>
> That, of course, shouldn't be happening in SSA form. After some di
On my local branch gcc.dg/torture/pr56349.c fails by sending GCC into an
infinite loop trying to simplify a self-referring statement. ie
something like
x_1 = x_1 + 10;
That, of course, shouldn't be happening in SSA form. After some digging
I've found the culprit.
Let's say we've got a PHI.
a_1
