[Bug rtl-optimization/17931] [4.0 Regresion] andl and testb are not combined

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-10-11 14:12 -------
This is a regression from 2.95.3:
        movl 4(%esp),%eax
        testb $1,(%eax)
        jne .L3
        movb (%eax),%al
        shrb $1,%al
        andl $1,%eax
        ret
        .p2align 4,,7
.L3:
        movl $1,%eax
        ret
And 3.0.4:
foo:
        movl    4(%esp), %eax
        testb   $1, (%eax)
        je      .L2
        movl    $1, %eax
        ret
        .p2align 4,,7
.L2:
        movzbl  (%eax), %eax
        shrb    %al
        andl    $1, %eax
        ret
And 3.2.3,3.3.3, and 3.4.0:
foo:
        movl    4(%esp), %eax
        movl    $1, %edx
        movzbl  (%eax), %eax
        testb   $1, %al
        jne     .L1
        shrb    %al
        movl    %eax, %edx
        andl    $1, %edx
.L1:
        movl    %edx, %eax
        ret
        .size   foo, .-foo
        .section        .note.GNU-stack,"",@progbits
        .ident  "GCC: (GNU) 3.4.0"

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|enhancement                 |minor
      Known to fail|                            |4.0.0
      Known to work|                            |3.3.3 3.0.4 2.95.3 3.4.0
            Summary|andl and testb are not      |[4.0 Regresion] andl and
                   |combined                    |testb are not combined
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17931