[Bug tree-optimization/70479] FMA is not reassociated causing x2 slowdown vs. ICC

2023-05-19 Thread pinskia at gcc dot gnu.org via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70479 Andrew Pinski changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution|---

[Bug tree-optimization/70479] FMA is not reassociated causing x2 slowdown vs. ICC

2016-03-31 Thread kyukhin at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70479 --- Comment #3 from Kirill Yukhin --- (In reply to Richard Biener from comment #2) > You mean we fail to handle ternary associative tree codes in GIMPLE reassoc? > Yes, that's true. It's not going to be easy to retro-fit there > implementation-w

[Bug tree-optimization/70479] FMA is not reassociated causing x2 slowdown vs. ICC

2016-03-31 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70479 --- Comment #2 from Richard Biener --- You mean we fail to handle ternary associative tree codes in GIMPLE reassoc? Yes, that's true. It's not going to be easy to retro-fit there implementation-wise. With rebalancing you mean handling reassoc-w

[Bug tree-optimization/70479] FMA is not reassociated causing x2 slowdown vs. ICC

2016-03-31 Thread kyukhin at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70479 --- Comment #1 from Kirill Yukhin --- (In reply to Kirill Yukhin from comment #0) > Compile: > GCC: g++ -march=haswell -Ofast -flto -fopenmp-simd -fpermissive m.cpp -o > m.gcc > ICC: icpc -O3 -ipo -fpermissive -xAVX2 -qopenmp m.cpp -o m.icc C