Use LEA as a faster way to do multiplication

imul-or-leaq.cs

//rax = 450 * rbx
imulq	$450, %rbx, %rax        ## imm = 0x1C2

//another way to do rax = 450 * rbx
//cycle wise, this is on par with imul instruction above
leaq    (%rbx,%rbx,8), %rax //rax=9*rbx
leaq    (%rax,%rax,4), %rax //rax=rax*5 == 45*rbx
leaq    (%rax,%rax,4), %rax //rax=rax*5 == 225*rbx
shlq    $1,%rax             //rax=rax*2 == 450*rbx

//Result:
//based on micro-benchmark, imulq-$450 ties with leaq-leaq-leaq-shlq instruction series,
//imulq-$225 however, is 2 clock cycle slower than leaq-leaq-leaq instruction series