ptx preliminary rtl patches [3/4]

[Bernd Schmidt]

On 09/11/2014 05:55 PM, Steven Bosscher wrote:
> On Thu, Sep 11, 2014 at 3:26 PM, Bernd Schmidt wrote:
>> nvptx will be the first port to use BImode and have STORE_FLAG_VALUE==-1.
>> That has exposed a bug in combine where we can end up calling
>> num_sign_bit_copies for a BImode value. However, the return value is always
>> 1 in that case, so it doesn't tell us anything and is going to be
>> misinterpreted by the caller.
>>
>> Bootstrapped and tested on x86_64-linux, together with the other patches.
>> Ok?
>
> This should be handled in num_sign_bit_copies itself, i.e. handle BImode there.

What do you expect that function to do different? It returns the correct 
value.


Bernd