[Bug target/61915] [AArch64] High amounts of GP to FP register moves using LRA on AArch64

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61915

--- Comment #6 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Evandro Menezes from comment #5)
> Created attachment 33249 [details]
> Dhrystone, part 2 of 3
> 
> I firstly observed this issue when looking into Dhrystone built with fairly
> standard options:
> 
> -O2 -fno-short-enums -fno-inline -fno-inline-functions
> -fno-inline-small-functions -fno-inline-functions-called-once
> -fomit-frame-pointer -funroll-all-loops
> 
> If I add -mno-lra, the code size in dhry_1.o is about 2% smaller.

Evandro, thanks for reporting this.  Sorry, I am busy with other thing these
days.  I'll start to work on this PR in September to try to make some progress
for the next GCC release.

May be a better remeaterialization in LRA I am working on now will help the PR
too.