[Bug target/125305] During gavl compilation, compiling hq/rgb_rgb_hq.c with -mtune=la664 takes 17 times as long as it does with -mtune=la464

[chenglulu at loongson dot cn via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125305

--- Comment #2 from chenglulu <chenglulu at loongson dot cn> ---
Debugging reveals that this issue is caused by the value of
TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD, which is set to 4 when tuning
for la464 but increased to 6 for la664.