Hi Kewen, 在 2023/9/18 15:34, Kewen.Lin 写道: > hanks for checking! So for P7, this patch looks neutral, but for P8 and > later, it may cause some few differences in code gen. I'm curious that how > many total object files and different object files were checked and found > on P8? P8 with -O2, following object files are different. 507.cactuBSSN_r datestamp.o 511.povray_r colutils.o 521.wrf_r module_cu_kfeta.fppized.o 526.blender_r particle_edit.o 526.blender_r glutil.o 526.blender_r displist.o 526.blender_r CCGSubSurf.o
P8 with -O3, following object files are different. 502.gcc_r ifcvt.o 502.gcc_r rtlanal.o 548.exchange2_r exchange2.fppized.o 507.cactuBSSN_r datestamp.o 511.povray_r colutils.o 521.wrf_r module_bc.fppized.o 521.wrf_r module_cu_kfeta.fppized.o 526.blender_r particle_edit.o 526.blender_r displist.o 526.blender_r CCGSubSurf.o 526.blender_r sketch.o > https://gcc.gnu.org/pipermail/gcc-patches/2023-February/612821.html > I also wonder if it's easy to reduce some of them further as small test cases. > > Since xxlor is better than fmr at least on Power10, could you also evaluate > the affected bmks on P10 (even P8/P9) to ensure no performance degradation? There is no performance recession on P10/P9/P8. The detail data is listed on internal issue. Thanks Gui Haochen
