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* lexer: convert pp-idents to keywords only after preprocessing lemon2025-12-202-71/+75
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* c: factor out to tldecl(), improve error recovery, lemon2025-12-201-73/+97
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* c.h init zero bitset portability lemon2025-12-191-1/+1
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* c: support 0-length arrays as syntax for flexible array members lemon2025-12-191-19/+29
| | | | | Keeping the expr around in the decllist paves the way for VLA support later on
* c: fix incr/decr codegen for floats lemon2025-12-191-2/+2
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* c: hack to support __FUNCTION__ GNU extension lemon2025-12-191-4/+10
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* cpp: GNU extension for named variadic arguments lemon2025-12-181-4/+7
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* cpp: better error recovery for #define syntax error lemon2025-12-181-6/+7
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* c: fix uninitiliazed field in decltypes lemon2025-12-171-0/+1
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* nicer defaults and facilities for cross-compilation lemon2025-12-171-2/+16
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* c: improve some type error diagnostics lemon2025-12-151-13/+22
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* create distinct interned string type lemon2025-12-154-75/+76
| | | | | | | | | | | | | | 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 lemon2025-12-153-47/+0
| | | | | Being in lex.c was vestigial, since it was being used all over the frontend and backend.
* lex: loop with goto instead of tail recursion lemon2025-12-151-7/+8
| | | | | This uncovered a edgecase with loops and lifetime construction in regalloc!
* lexer: use a hashmap to lookup keywords lemon2025-12-152-28/+28
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* c: error when defining function with incomplete parameter type lemon2025-12-151-0/+4
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* c: support forward-declared enums lemon2025-12-151-34/+32
| | | | This is a common non-standard GNU extension.
* c: emit data for __func__ lazily lemon2025-12-151-15/+16
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* c: fix another memory-leak-when-errors case lemon2025-12-141-1/+2
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* c: as a hack, warn for zero-length array instead of error lemon2025-12-141-1/+1
| | | | | Treated as unsized array T[]. This shows up in some linux headers as a non-standard way to have flexible array members.
* c/builtin: fix vacopy lemon2025-12-141-5/+6
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* c: fix memory leak if initializer data if error lemon2025-12-141-1/+1
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* eval: long double placeholder lemon2025-12-141-1/+2
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* cpp: support #line directives lemon2025-12-141-10/+75
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* cpp: correctly handle extra tokens after directives lemon2025-12-141-16/+21
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* only put dats can in .text now when emitting it lemon2025-12-141-2/+2
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* various relocation related optimization lemon2025-12-141-3/+3
| | | | | | | | | | 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.
* c: handle more static eval edgecases for int -> ptr lemon2025-12-132-5/+20
| | | | | sqlite3 was falling back to `((void*)&((char*)0)[X])` for INT_TO_PTR, which this handles now.
* c: case/default labels only create new blocks when necessary lemon2025-12-131-7/+11
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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.
* s/amd64/x86_64/ lemon2025-12-121-1/+1
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* c: switch stmt diagnostics lemon2025-12-121-8/+49
| | | | For duplicate cases, case value overflow
* lex: use pmap for macro lookup lemon2025-12-122-126/+70
| | | | To reduce hashmap code repetition. Also add pmap_del for this purpose
* rename arraylength macro -> countof lemon2025-12-113-51/+51
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* c: accept C99 `[static N]` style array decls, changes to fn quals lemon2025-12-111-24/+45
| | | | | | Function parameters qualifiers don't matter outside of function definition. `int (const int)` should be compatible with `int(int)` etc. So no need to store them in the typedata.
* _Alignof and stuff lemon2025-12-111-11/+18
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* c: use a look-up table for isdecltok() lemon2025-12-111-14/+18
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* -trigraphs option lemon2025-12-111-3/+3
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* c: optimize environment decl lookup lemon2025-12-111-6/+26
| | | | | Use a hashmap for the toplevel, optimizing for the common use case where the file-scope has many more declarations than local scopes do
* c: disallow mismatched nested extern decl, & more diagnostics lemon2025-12-111-17/+24
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* c: support for noreturn, and decl parsing cleanup lemon2025-12-112-107/+115
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* lex/expr(): cleanup lemon2025-12-111-29/+29
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* c: expr2reloc() change sig to return addend lemon2025-12-111-15/+12
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* lexer: properly add padding for cpppredefs lemon2025-12-101-2/+2
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* c: fix static relocation for &sym[offset] lemon2025-12-101-7/+6
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* c: fix compound assignment type conversions when types don't match lemon2025-12-101-2/+3
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* lex: make some hashtables resizable lemon2025-12-091-29/+67
| | | | Was hiting the fixed limits trying to preprocess sqlite3amalgamation
* c: fix some static initialziers lemon2025-12-081-1/+3
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* eval: &*x address constants lemon2025-12-081-0/+4
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* c: fix more declaration parsing bugs lemon2025-12-081-7/+17
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