[Bug rtl-optimization/336] Superfluous instructions generated from bit-field operations

[roger at eyesopen dot com]

------- Additional Comments From roger at eyesopen dot com  2005-02-19 19:56 -------
This bug has now been fixed for gcc 4.0.  For the testcase attached to the PR,
mainline now generates the following code on sparc-sun-solaris2.8 with -O2:

fun:    ld      [%sp+64], %o5
        sll     %o0, 2, %g1
        mov     %o5, %o0
        or      %g1, 2, %g1
        jmp     %o7+12
        st     %g1, [%o5]

i.e. we've now eliminated the unnecessary "and" and "or" instructions, that
were present in 2.95.2 (and still present in 3.4.3).


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|SUSPENDED                   |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=336