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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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* add command-line predefined macros (-D, -U) lemon2025-12-061-4/+52
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* eval: fix float cmps lemon2025-12-051-0/+2
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* cpp: implement preprocessor expressions short circuiting behaviour lemon2025-12-031-17/+23
| | | | This only affects whether an error is given for something like `0 && 0/0` (it shouldn't)
* c: allow redeclaration with K&R and non K&R prototypes lemon2025-12-031-2/+10
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* preprocessor: add #ifndef...#endif include guard optimization lemon2025-12-022-11/+30
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* c: make tentative definitions work lemon2025-12-021-17/+34
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* c: narrowing ints of different signedness... lemon2025-12-011-1/+1
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* c: edgecase for redeclaration of implicit sized array lemon2025-12-011-1/+1
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* c: fix some decl bugs and diagnostics lemon2025-11-301-18/+34
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* lex: remove some hacks and optimize preprocessor lemon2025-11-281-39/+34
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* c/type: make implicit const T* -> T* conversion warning, not error lemon2025-11-261-1/+8
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* c: more static initializer fixes lemon2025-11-262-7/+9
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* c: fix elided-braces initializers for nested unions lemon2025-11-261-5/+16
| | | | | | | | For example in ```c struct {int a; union { int b,c; }; int d; } X = {1,2,3}; ``` Fields `a`,`b`,`d` must get initialized to 1,2,3. Not `c`
* pp: fix token pasting (hopefully) lemon2025-11-241-27/+15
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* c: fix condexprvalue lemon2025-11-241-54/+42
| | | | | The original implementation was broken when presented with nested short-circuiting logical operators.
* c: remove unused function lemon2025-11-241-8/+0
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* c: create dummy unreachable block after trap lemon2025-11-242-5/+2
| | | | | | Reverts 9abe27f6712. This simplies expr codegen, otherwise would manually have to check `fn->curblk != NULL` repeatedly. Later passes will easily delete those unreachable blocks
* ir: implement cvtu64f. and other bug fixes lemon2025-11-231-1/+4
| | | | | compiler is bootstrapping?! however, stage1 and stage2+ executables aren't bit-identical.. small differences in the codegen.. need to look into that
* c: check actual reachability for non-void func may not return value lemon2025-11-231-2/+6
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* c: implement compound initializer in static context lemon2025-11-231-2/+18
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* lex: TEMP hack: #define __x86_64__ or some system headers break subtly lemon2025-11-231-0/+1
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* c: fix runtime implicit-length array initializer lemon2025-11-231-2/+3
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* c: __builtin_va_copy lemon2025-11-231-8/+21
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* implement float varargs, and some other fixes lemon2025-11-231-0/+3
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* cpp: fix bugs with recursive macro expansion (hopefully) lemon2025-11-232-28/+25
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* cpp: fix ## bug lemon2025-11-231-1/+1
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