RFA: patch to solve PR37535

[Jeff Law]

H.J. Lu wrote:
> On Tue, Sep 16, 2008 at 6:20 PM, Vladimir Makarov <vmakarov@redhat.com> wrote:
>   
>> The following patch solves the PR37535.  The analysis of the problem can be
>> found on
>>
>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37535
>>
>> The patch was successfully bootstraped on x86_64.
>>
>>
>>     
>
> Hi Vladimir,
>
> I tried your patch on ira-merge branch. It failed to boostrap
> on Linux/ia32. I got
>
> Comparing stages 2 and 3
> warning: ./cc1-checksum.o differs
> warning: ./cc1plus-checksum.o differs
> warning: ./cc1obj-checksum.o differs
> Bootstrap comparison failure!
> /fold-const.o differs
> make[4]: *** [compare] Error 1
>
>
>   
But weren't you seeing comparison failures prior to the patch for 
37535?  If we haven't fixed those (and it sounds like removing the uses 
of doubles from IRA didn't), then we shouldn't really be looking at 
37535 as the root cause for the comparison failures.

Jeff