IRA observation/question

[Pat Haugen]

On 05/16/2011 04:19 PM, Georg-Johann Lay wrote:
> Pat Haugen schrieb:
>> I'm seeing some odd behavior in ira for PowerPC, starting with the big ira
>> merge best I can tell (r171649).
>>
>> void foo(float *f1, float*f2) {
>>   *f1 = *f2;
>> }
>>
>> If I compile with gcc -S -m64 -O3 -mcpu=power7 and look at the ira dump, I see
>> that the pseudo used to copy the data, r120, is spilled. Reload comes along
>> and fixes up this simple example so we end up with just a load/store for the
>> copy, but spilling when we have plenty of available registers is obviously wrong.
>
> Reminds me of PR48435 which Vladimir fixed in r172202.

I'm still seeing my issue in r173736.

-Pat