[Bug rtl-optimization/22568] Should use cmov in some stituations

[rguenth at gcc dot gnu dot org]

------- Additional Comments From rguenth at gcc dot gnu dot org  2005-09-01 
12:38 -------
I have a patch that for

int a,b;
void foo(void)
{
  int x;
  if (a<b) x=a,a=b,b=x;
}

produces

bar:
        movl    a, %eax
        movl    b, %edx
        cmpl    %edx, %eax
        movl    %eax, %ecx
        cmovl   %edx, %ecx
        cmovge  b, %eax
        movl    %ecx, a
        movl    %eax, b
        ret

but it produces horrible code if the stuff is not available in pseudos
already.  (i.e. we miss load/store sinking)

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22568