[RFC 02/14] Remove some 'fastcall' code

[Tom Tromey]

>> This patch removes this code and in the process removes some
>> unnecessary global variables, by turning them into let bindings.

Jose> The change LGTM.

Jose> The only comment I have is that it seems to me the / prefix for symbol
Jose> names seems to be used for globals?  I don't think locally let-defined
Jose> symbols are to be using that prefix...

I removed the leading "/"

Tom