https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67057
--- Comment #2 from Oleg Endo ---
(In reply to Oleg Endo from comment #0)
> Combine is looking for a pattern:
>
> Failed to match this instruction:
> (set (reg:SI 162 [ D.1652 ])
> (plus:SI (zero_extract:SI (reg:SI 4 r4 [ a ])
>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67057
--- Comment #1 from Oleg Endo ---
For some cases where T+const_int is calculated, like ...
int foo (int a, int b)
{
return a == b ? 5 : 4;
}
comiled with -O2:
cmp/eq r5,r4
movtr0
rts
add #4,r0
..
