[Bug rtl-optimization/18560] better optimalization of EOR/MOV block.

[rask at gcc dot gnu dot org]

------- Comment #7 from rask at gcc dot gnu dot org  2007-11-09 20:40 -------
This has been fixed for more than a year:

reverse:
        @ args = 0, pretend = 0, frame = 0
        @ frame_needed = 0, uses_anonymous_args = 0
        @ link register save eliminated.
        eor     r3, r0, r0, ror #16     @ 12    *arith_shiftsi  [length = 4]
        bic     r3, r3, #16711680       @ 13    *arm_andsi3_insn/2      [length
= 4]
        mov     r0, r0, ror #8          @ 15    *arm_shiftsi3   [length = 4]
        eor     r0, r0, r3, lsr #8      @ 23    *arith_shiftsi  [length = 4]
        @ lr needed for prologue        @ 36    prologue_use    [length = 4]
        bx      lr      @ 39    return  [length = 12]
        .size   reverse, .-reverse
        .ident  "GCC: (GNU) 4.2.0 20060729 (experimental)"

4.3.0 (revision 129967) generates the same code.


-- 

rask at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
      Known to work|                            |4.2.0 4.3.0
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18560