[Bug rtl-optimization/17387] Redundant instructions in loop optimization

[steven at gcc dot gnu dot org]

------- Additional Comments From steven at gcc dot gnu dot org  2005-01-23 
13:35 -------
Mainline today produces: 
 
foo: 
.LFB2: 
        xorl    %eax, %eax 
        movl    $4, %ecx 
        movl    $state, %edx 
        .p2align 4,,7 
.L2: 
        mov     %eax, %eax 
        movl    S(,%rax,4), %eax 
        xorl    (%rdx), %eax 
        movl    %eax, (%rdx) 
        mov     %eax, %eax 
        movl    S(,%rax,4), %eax 
        xorl    4(%rdx), %eax 
        movl    %eax, 4(%rdx) 
        mov     %eax, %eax 
        movl    S(,%rax,4), %eax 
        xorl    8(%rdx), %eax 
        movl    %eax, 8(%rdx) 
        mov     %eax, %eax 
        movl    S(,%rax,4), %eax 
        xorl    12(%rdx), %eax 
        movl    %eax, 12(%rdx) 
        addq    $16, %rdx 
        decl    %ecx 
        jne     .L2 
        andl    $255, %eax 
        ret 
 

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17387