`tmp` variables

[vitiral]

I realized that creating tmp variables is fairly trivial actually. The basic syntax is:

tmp( myTmp1: Type1 =  (...), myTmp2: Type2 = (...) ) do ( ... use tmp variables ...)

Basically what this does is

tmp <grow return stack by size of tmp variables > do <use tmp variables> <shrink return stack by size of tmp variables>

What the compiler does is:

• have a global value for current tmpOffset. This starts at the function locals offset.
• when tmp is executed it creates a comp function that treats every symbol as a tmp variable
  • we should update var to behave this way as well
• tmp variables:
  • create a "local" variable in the function dictionary which is at (aligned) tmpOffset and increment tmpOffset by size, just like var
  • call spor GRS (Grow Return Stack) to grow the RS by that amount
• Also have a compiler flag for no ret -- no continues, breaks, or returns inside of a tmp variable (the stack will never be reduced).

Something like that