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
