[Bug target/82260] [x86] Unnecessary use of 8-bit registers with -Os. slightly slower and larger code

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82260

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The -fdump-rtl-final is identical between -Os and -O3 in this case, it is
purely the *movqi_internal insn mode choice:
             (and (eq_attr "type" "imov")
                  (and (eq_attr "alternative" "0,1")
                       (and (match_test "TARGET_PARTIAL_REG_DEPENDENCY")
                            (and (not (match_test "optimize_function_for_size_p
(cfun)"))
                                 (not (match_test
"TARGET_PARTIAL_REG_STALL"))))))
               (const_string "SI")