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70 commits

Author SHA1 Message Date
Jack Palevich
58c30eef99 Code generator cleanup 
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.
 2009-07-17 16:35:23 -07:00
Jack Palevich
b40367bde1 Remove unused logging code. 2009-07-17 13:51:51 -07:00
Jack Palevich
ba929a4ffa Track lvalues vs. rvalues. 2009-07-17 10:20:32 -07:00
Jack Palevich
3377bfd845 Report error (rather than crashing) when a declaration name is missing. 
Repo case:

void main()
{
   int );
}
 2009-07-16 19:05:07 -07:00
Jack Palevich
8148c5be54 Coerce R0 to destination type before storing it into a variable. 2009-07-16 18:24:47 -07:00
Jack Palevich
dc45646238 Implement a "#line" directive. 2009-07-16 16:50:56 -07:00
Jack Palevich
b1544cad42 Detect assignments to undeclared variables. 
Previously we only detected reading from undefined variables.
 2009-07-16 15:09:20 -07:00
Jack Palevich
ce105a9082 If the compile failed, return NULL from symbol lookups. 2009-07-16 14:30:33 -07:00
Jack Palevich
d1f57e689b Improve error handling 
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.
 2009-07-15 18:23:22 -07:00
Jack Palevich
2aaf21f1be Improve numerical constant parsing. 2009-07-15 16:16:37 -07:00
Jack Palevich
8c246a9dc2 Add accRegisterSymbolCallback API to control external symbol linkage. 
Until now dlsym was used to lookup external symbols. Now you can
register your own function to be called when an undefined symbol is
used.
 2009-07-14 21:14:10 -07:00
Jack Palevich
37c54bd22e Make forward declarations of external symbols really work. 
Until now we had always been treating external variables as "int",
and external functions as int (...);
 2009-07-14 18:35:36 -07:00
Jack Palevich
7ecc5556ae Remove unused variable. 2009-07-14 16:24:55 -07:00
Jack Palevich
a8f427f606 Implement pointer arithmetic. 2009-07-13 18:40:08 -07:00
Jack Palevich
25c0ccaed4 Implement support for "char" local and global variables. 2009-07-13 16:56:28 -07:00
Jack Palevich
45431bc252 Implement general casts and pointer dereferencing. 
Prior to this casts and pointer dereferencing were special-cased.
 2009-07-13 15:57:26 -07:00
Jack Palevich
b7718b973c Implement floating point for ARM. 2009-07-09 22:00:24 -07:00
Jack Palevich
bab8064203 Add x86 floating point test. 2009-07-09 13:54:54 -07:00
Jack Palevich
2a4e1a9f88 Finish implementing x86 floating point 
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.
 2009-07-09 13:34:25 -07:00
Jack Palevich
a39749f641 Implement x86 floating point operations 
+ unary floating point operation -
 + unary floating point compare: !
 + binary floating point operations +-*/
 + binary floating point comparisons: < <= == != >= >
 2009-07-08 20:40:31 -07:00
Marco Nelissen
eea5ae9ceb Class with virtual methods should have virtual destructors too. 2009-07-08 17:43:17 -07:00
Jack Palevich
9cbd226960 Implement global, local, and stack based float and double variables. 2009-07-08 16:48:41 -07:00
Jack Palevich
128ad2d204 Implement x86 int <--> float. 2009-07-08 14:51:31 -07:00
Jack Palevich
1a539db23c Some x86 floating point code works. 
We now check the types and number of arguments to a function.
 2009-07-08 13:04:41 -07:00
Jack Palevich
8df4619e09 Start tracking types in expressions. 2009-07-07 14:48:51 -07:00
Jack Palevich
1aeb87b52b Parse floating point (and double) constants. 2009-07-06 18:33:20 -07:00
Jack Palevich
9eed7a2c7b Start teaching the code generator about types. 
Remove the concept of "R1" from the code generator API, R1 is used
internally as needed.
 2009-07-06 17:24:34 -07:00
Jack Palevich
95727a0b05 Initial support for float, double. 2009-07-06 12:07:15 -07:00
Jack Palevich
3f22649d98 Implement our hard casts using our type system. 
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.
 2009-07-02 14:46:19 -07:00
Jack Palevich
40600de143 Clean up expression code. 
Concatenate adjacent string literals.
 2009-07-01 15:32:35 -07:00
Jack Palevich
8635198c57 Add a type system. 
We now track the declared type of variables and functions.
 2009-06-30 18:09:56 -07:00
Jack Palevich
569f135862 Implement a token table and an arena allocator. 
+ 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.
 2009-06-30 10:16:43 -07:00
-b master
422972cb12 Align ARM stack pointer to an 8-byte boundary when calling functions. 
This is required by the ARM EABI standard.
 2009-06-17 19:13:52 -07:00
Jack Palevich
a1804ddeba Allow local variables to be declared anywhere in a block. 2009-06-12 14:40:04 -07:00
Jack Palevich
d7461a7342 Support variable initialization. 
Global variables can only be initialized to integer constants.

Local variables can be initialized to arbitrary expressions.
 2009-06-12 14:26:58 -07:00
Jack Palevich
f1728bec74 Reserve all C99 keywords. 
And improve checks/error messages around using non-symbols where a
symbol is expected.
 2009-06-12 13:53:51 -07:00
Jack Palevich
22e3e8e1a6 Handle end-of-file inside of comments, local declarations. 2009-06-12 13:12:55 -07:00
Jack Palevich
b4758ff1de Implement string and character backslash constants. 
Until now we only supported '\n'. Now we support everything, including
octal ('\033') and hex '\x27' constants.
 2009-06-12 12:49:14 -07:00
Jack Palevich
2ccc40d096 Make #define work again. (Had accidentally omitted the keyword.) 2009-06-12 11:53:07 -07:00
Jack Palevich
a6baa23f08 Improve symbol-related error checking 
+ Duplicate symbols.
+ Undefined variables;
+ Forward-referenced functions that were never defined.
 2009-06-12 11:25:59 -07:00
Jack Palevich
b67b18f7c2 Add code generator tracer. 2009-06-11 21:50:17 -07:00
Jack Palevich
303d8ffca9 Improve local variable scoping. 
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.
 2009-06-11 21:47:57 -07:00
Jack Palevich
2db168f12f Use a separate table for keywords. 2009-06-11 14:29:47 -07:00
Jack Palevich
0a280a0dde Remove use of setjmp/longjmp from libacc compiler. 
It makes it harder to deal with memory allocation.

Also fix bug in the otcc-ansi.c test, where the wrong part of the
code buffer was being mprotected, so that if the code buffer happened
to be allocated across a page boundary, some code would no receive
execute permission.
 2009-06-11 10:53:51 -07:00
Jack Palevich
8dc662efe9 Make otcc code work in x64 based system with 32-bit chroot. 
Set execute permission on code before running it.
Handle negative relative offsets for global variables.
Add printfs to report the progress of nested compiles.
Change way we detect whether we can run the host compiler
or not. We used to check if we were running on a 32-bit
Linux. Now we check if the executable is a 32-bit Linux
executable.
 2009-06-09 22:59:04 +00:00
Jack Palevich
36d9414f72 Make a host version of acc for testing. 
Don't run the code we've compiled unless the -R option is present.
 2009-06-08 15:55:32 -07:00
Jack Palevich
2d11dfba27 Move macros into their own table. 
Catch attempts to define macros with parens (not supported.)
 2009-06-08 14:34:26 -07:00
Jack Palevich
b7c81e9952 Switch to ANSI C style C function declarations. 
main(argc, argv) --> int main(int argc, char** argv)

Although we accept int, void, and char types, and pointers to same,
we actually still treat everything as an int.
 2009-06-04 19:56:13 -07:00
Jack Palevich
eedf9d2083 Add support for #pragma foo(bar) 
Report unsupported/unknown preprocessor directives.
Report line number of error rather than character offset.
 2009-06-04 16:38:35 -07:00
Jack Palevich
f1f39cca30 Make sure we don't overflow various internal compiler buffers. 
We may replace some of these tables with dynamically growing data
structures, but in the meantime we will not trash memory.
 2009-05-29 18:03:15 -07:00