setjmp/longjmp

[stevel at haddock.UUCP]

How can one make setjmp longjmp work with a compiler that
optimizes register usage to the point of holding values, both
intermediate and automatics in registers across expressions. I
know that pcc and the Ritchie compiler don't do this but some
newer ones do.

Forcing one to know what was going on in all the registers and
where the current live value for automatic variable is limits
how one can use graph coloring algoithms to allocate registers.

Steve Ludlum, decvax!yale-co!ima!stevel, {amd|ihnp4!cbosgd}!ima!stevel