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Subject: Re: Fix VR_ANTI_RANGE handling in intersect_range_with_nonzero_bits (PR 84321)
To: Richard Biener <richard.guenther@gmail.com>, GCC Patches <gcc-patches@gcc.gnu.org>, Richard Sandiford <richard.sandiford@linaro.org>
References: <87sha69qfc.fsf@linaro.org> <CAFiYyc39dp7zb=af=_EbdZiAch_Moc_t2+bC+=8CpTBTqPHZmg@mail.gmail.com>
From: Jeff Law <law@redhat.com>
Message-ID: <9e661d7f-2e3d-0390-fcbb-be662ac9f577@redhat.com>
Date: Tue, 13 Feb 2018 15:49:00 -0000
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On 02/13/2018 08:26 AM, Richard Biener wrote:
> On Mon, Feb 12, 2018 at 4:29 PM, Richard Sandiford
> <richard.sandiford@linaro.org> wrote:
>> VR_ANTI_RANGE is basically a union of two ranges, and although
>> intersect_range_with_nonzero_bits had code to deal with the upper
>> one being empty, it didn't handle the lower one being empty.
>> There were also some off-by-one errors.
>>
>> This patch rewrites the code in a hopefully clearer way.
>>
>> Tested on aarch64-linux-gnu and x86_64-linux-gnu.  OK to install?
> 
> Ok.
And committed.

jeff