strcpy.c

	/* strcpy: copy t to s; pointer version 2 */
	void strcpy(char *s, char *t)
	{
		while ((*s = *t) != '\0') {
			s++ ;
			t++ ;
		}
	}


strcpy.s (gcc-3.3.3)

		.file	"strcpy.c"
		.text
	.globl strcpy
		.type	strcpy, @function
	strcpy:
		pushl	%ebp
		movl	%esp, %ebp
		nop
	.L2:
		movl	8(%ebp), %eax
		movl	12(%ebp), %edx
		movb	(%edx), %dl
		movb	%dl, (%eax)
		testb	%dl, %dl
		jne	.L4
		jmp	.L1
	.L4:
		incl	8(%ebp)
		leal	12(%ebp), %eax
		incl	(%eax)
		jmp	.L2
	.L1:
		leave
		ret
		.size	strcpy, .-strcpy
		.section	.note.GNU-stack,"",@progbits
		.ident	"GCC: (GNU) 3.3.3 20040412 (Red Hat Linux 3.3.3-7)"


strcpy.s (gcc-4.4.5)

		.file	"strcpy.c"
		.text
	.globl strcpy
		.type	strcpy, @function
	strcpy:
		pushl	%ebp
		movl	%esp, %ebp
		jmp	.L2
	.L3:
		addl	$1, 8(%ebp)
		addl	$1, 12(%ebp)
	.L2:
		movl	12(%ebp), %eax
		movzbl	(%eax), %edx
		movl	8(%ebp), %eax
		movb	%dl, (%eax)
		movl	8(%ebp), %eax
		movzbl	(%eax), %eax
		testb	%al, %al
		jne	.L3
		popl	%ebp
		ret
		.size	strcpy, .-strcpy
		.ident	"GCC: (Debian 4.4.5-8) 4.4.5"
		.section	.note.GNU-stack,"",@progbits