Optimize multiple ++s into +=

[dplassgit]

a++
a++
a++

is probably faster as

a=a+3

[dplassgit]

It's only faster if temps are not used, but they are.

On x64, an INC is 1 tick and an ADD is also one tick.

Assuming a is a parameter, a++ maps to inc ECX . Times 3 is 3 ticks

a=a+3 maps to

mov EBX, ECX
add EBX, 3
mov ECX, EBX

which is 3 ticks. I want to get this down to one tick: add ECX, 3 which is issue #178

[dplassgit]

Since issue #178 is closed, this can proceed.