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* backend: unify pass memory allocation strategies lemon2025-12-201-0/+9
| | | | | | It was all over the place for temporary data structures used by individual passes. Now there is an arena specifically for that, which is nicer.
* backend: general simplification pass skeleton lemon2025-12-201-1/+4
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* ir: move some filluses() to ir.c, rename optmem.c -> mem2reg.c lemon2025-12-191-0/+27
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* ir: move cls2load to interface lemon2025-12-181-3/+6
| | | | | There's plenty of code duplication like this around I'm looking to reduce.
* create distinct interned string type lemon2025-12-151-3/+3
| | | | | | | | | | | | | | Interned strings are used pervasively, so it's a good idea to add a layer of type safety to differentiate them from general cstrs and avoid potential bugs from comparing non-interned and interned strings. Not that that's happened so far that I can remember, but it could. I'm 90% sure it's legal to alias `struct {char c;}` pointers with `char` pointers. This specific typedef gives type safety but with a simple one-way `internstr -> const char *` typecast (with `&istr->c`). Converting the other way around is more intentional: a straight up cast `(internstr)cstr` which sticks out as unchecked and probably wrong, or calling the intern(cstr) function, which is the right way.
* move intern() to mem.c lemon2025-12-151-1/+0
| | | | | Being in lex.c was vestigial, since it was being used all over the frontend and backend.
* only put dats can in .text now when emitting it lemon2025-12-141-1/+1
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* various relocation related optimization lemon2025-12-141-4/+6
| | | | | | | | | | With 59ca5a8db, querying if a symbol is defined is cheap. If we're compiling code that calls foo() and we defined foo() in this compilation unit, we already know its offset within the .text section, so use it instead of emitting a relocation for the linker to handle. Also, put small literal data in the .text section instead of .rodata. This seems to improve performance (cache locality?), and as a bonus, it will be good for aarch64's instr encoding with smallish PC-relative offsets.
* Add -O optimization flag lemon2025-12-131-2/+4
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* fix position independent loads of function symbols. lemon2025-12-131-3/+3
| | | | | | | | For `extern int x[1];`, can use PCREL32 for &x. But for `extern int x(int)`, must use GOTREL, when not being called directly (that's PLT). Therefore the type of an external symbol (actually just whether it denotes a function) matters when deciding what kind of relocation to emit, so keep that information.
* rename arraylength macro -> countof lemon2025-12-111-14/+14
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* c: check actual reachability for non-void func may not return value lemon2025-11-231-0/+21
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* implement float varargs, and some other fixes lemon2025-11-231-1/+2
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* ir: freeblk: clear preds lemon2025-11-221-0/+2
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* ir/ir.c: fix assert in mkcallarg lemon2025-11-221-1/+1
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* ir: barebones IR passes checked contracts lemon2025-11-211-0/+3
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* rename IR classes to reflect bitsize lemon2025-11-211-9/+9
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* ir: fix delpred when npred becomes 1 lemon2025-11-211-2/+12
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* ir: for easier debugging, keep ctype in dats, print as literal when possible lemon2025-11-201-2/+2
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* debug output to stdout lemon2025-11-191-1/+1
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* preeliminary va_list support lemon2025-11-141-9/+44
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* ir: fix addcon equality check.. lemon2025-11-121-1/+1
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* ir: free uses lemon2025-11-121-0/+4
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* amd64: fix aggregate abi stuff;; ir: fold, peephole optimizing constructors lemon2025-11-051-93/+2
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* c: also propagate terminates in genswitch lemon2025-10-241-1/+0
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* codegen fixes, propagate terminate lemon2025-10-241-1/+2
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* ir bugfixes lemon2025-10-231-1/+20
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* refactor vec_of(T) and misc lemon2025-10-201-1/+1
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* Organize source files into directories lemon2025-10-191-0/+618
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