https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110724
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2023-07-18
Ever confirmed|0 |1
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The generic tuning is:
"16:11:8", /* Loop alignment. */
"16:11:8", /* Jump alignment. */
"0:0:8", /* Label alignment. */
The the operands are described as:
https://gcc.gnu.org/onlinedocs/gcc-13.1.0/gcc/Optimize-Options.html#index-falign-functions
```
-falign-functions=n:m:n2
...
Examples: -falign-functions=32 aligns functions to the next 32-byte boundary,
-falign-functions=24 aligns to the next 32-byte boundary only if this can be
done by skipping 23 bytes or less, -falign-functions=32:7 aligns to the next
32-byte boundary only if this can be done by skipping 6 bytes or less.
The second pair of n2:m2 values allows you to specify a secondary alignment:
-falign-functions=64:7:32:3 aligns to the next 64-byte boundary if this can be
done by skipping 6 bytes or less, otherwise aligns to the next 32-byte boundary
if this can be done by skipping 2 bytes or less. If m2 is not specified, it
defaults to n2.
```
So align jumps to 16 byte if 11 or less bytes can be used or 8 byte alignment
Which is exactly what this does:
.p2align 4,,7 # <-- unnecessary alignment
.p2align 3
