This is another step towards being able to handle lval / rvals.
Improved storeR0ToTOS to convert R0 to the proper type to store into
*TOS. (This is something that storeR0 was already doing.)
Removed storeR0 as it is no longer being used.
This makes it easier to generate frame-pointer-relative addresses for ARM.
Prior to this we had stored char sized local variables in the highest
address of the 4-byte stack allocation. Now we store "char"s in the
lowest address of the 4-byte stack allocation, just like chars are
passed as arguments.
We now store global chars on byte boundaries.
This means we don't have to pass it around as an argument.
This change was made because I'm about to start creating pointer types
during expression evaluation, and I didn't want to add an arena
argument to all the expression functions.
Factor ARM integer binary operation setup code into a function.
Don't pass redundant pType information into loadR0FromR0, storeR0ToTOS,
gcmp, gUnaryCmp, li
Separate inc/dec from variable loading. Generates worse code, but now
we handle pointer inc/dec and char inc/dec.
Don't segfault if the right-hand operand of a binary operator is missing.
Don't segfault if a semicolon is missing at the end of a forward
declaration.
Support floating-point if/while statements: if(1.0) { ... }
Support reading values from float and double pointers.
And some additional error checking.
Detect malformed "return" statements
Detect passing the results of "void" functions as arguments.
Doesn't add any new capabilities, but we now generate error
messages if you attempt casts we don't support,
and we also found and fixed some bugs in declaration parsing.
+ Tokens are now simple IDs, rather than ids or maybe pointers.
+ We can now allocate data that's freed automatically when
compilation end or when a block goes out of scope.
+ Renamed our Array utility class to Vector, and made its
api work a little more like the STL vector template class.
Until now we faked local variables -- they only worked correctly if
there was no overlap between local variables and global variables.
Use a symbol table stack instead of a string list.
Fix bug with looking up undefined symbols.
Jack Palevich