[Bug target/77729] aarch64 inserts unneeded uxtb after ldrb, orr ...32

[fw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77729

Florian Weimer <fw at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |fw at gcc dot gnu.org

--- Comment #7 from Florian Weimer <fw at gcc dot gnu.org> ---
Something similar happens on x86_64 with -Os.  The OR instruction operates on
%eax instead of %al:

0000000000000000 <TrieCase3>:
   0:   8a 07                   mov    (%rdi),%al
   2:   83 c8 20                or     $0x20,%eax
   5:   3c 74                   cmp    $0x74,%al

(Byte-wise OR would be 0x0c 0x20, one byte shorter.)