On 26 Jun 2007 21:55:34 -0000, rguenther at suse dot de
<[EMAIL PROTECTED]> wrote:
I have a hard time deciding if 3.4 or 4.1 is better:
3.4:
f:
pushl %ebp
movl %esp, %ebp
movl 8(%ebp), %edx
movzbl 12(%ebp), %eax
testl %edx, %edx
je .L2
movb $1, %al
.L2:
movsbl %al,%eax
<---- unconditional movsbl.
movl %eax, 8(%ebp)
popl %ebp
jmp g
4.1 (same as 4.2):
f:
pushl %ebp
movl $1, %edx
movl %esp, %ebp
movl 8(%ebp), %ecx
movzbl 12(%ebp), %eax
testl %ecx, %ecx
je .L7
movl %edx, 8(%ebp)
popl %ebp
jmp g
.p2align 4,,7
.L7:
movsbl %al,%edx
// <--- condtional movsbl
movl %edx, 8(%ebp)
popl %ebp
jmp g
It is easier to see the diference between 3.4 and the trunk where we
don't duplicate the tail call to g.
Thanks,
Andrew Pinski
