[Bug target/83726] [8 Regression] ICE: in final_scan_insn, at final.c:3063

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83726

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Steve Ellcey from comment #7
> pr83081.f90 looks like a new test so it may not actually be a regression
> related to this patch, but the first two are.  pr79041-2 generates:
> 
> t:
> 	mov	x0, 0
> 	mov	x1, 65536
> 	ret
> 
> with the patch rather than:
> 
> t:
> 	adr	x0, .LC0
> 	ldp	x0, x1, [x0]
> 	ret
> 	.size	t, .-t
> 	.align	4
> .LC0:
> 	.xword	0
> 	.xword	65536

The first code generation is better than doing a load.  That is doing two mov
is better than doing an adr/ldp in terms of size and even ldp could miss the
cache  while the two mov are independent and can most likely be executed on the
same pipeline.