[Bug middle-end/23295] fold does not simplify -a - (5) to (-5) - a

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-08-09 
03:31 -------
And then we can get optimial rtl generation right away for PPC:
(insn 20 17 26 0 (set (reg/i:SI 3 r3 [ <result> ])
        (minus:SI (const_int -5 [0xfffffffffffffffb])
            (reg:SI 3 r3 [ a ]))) 78 {*rs6000.md:1236} (nil)
    (nil))

If we expand it correctly instead of depending on combine :).

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23295