[Bug target/122504] [13/14/15/16 Regression] -fno-plt code quality regression on arm64

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122504

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
```
Trying 6 -> 7:
    6: r92:DI=`f1'
      REG_EQUAL `f1'
    7: call [r92:DI] argc:0
      REG_DEAD r92:DI
      REG_CALL_DECL `f1'
Successfully matched this instruction:
(parallel [
        (call (mem:DI (symbol_ref:DI ("f1") [flags 0x41]  <function_decl
0x793a1bc28000 f1>) [0 f1 S8 A8])
            (const_int 0 [0]))
        (clobber (reg:DI 30 x30))
    ])
allowing combination of insns 6 and 7
original costs 4 + 0 = 0
replacement cost 0
deferring deletion of insn with uid = 6.
modifying insn i3     7: call [`f1'] argc:0
      REG_CALL_DECL `f1'
deferring rescan insn with uid = 7.
```

is the cause. 

That is due to r8-685-g47210a041b3b40 .