Hojun-Cho
e8d3d89fef
New `w6c -I <out.wwi>` flag (both stages) writes a re-parseable ww-prototype rendering of a package's EXPORTED surface. M2 dead-code: nothing consumes .wwi yet (combined.ww stays the live path); the flag is off on every existing invocation, so the 990-997 byte-id gates and all prior tests are unperturbed. The unparse walks the AST type-expr subtree (N_T* nodes), not the tinfo Type* (which collapses nominal pkg.Name identity). Deterministic output: package line, byte-sorted imports, byte-sorted decls — a pure function of the exported API. cmd/w6c/wwi.c + selfhost/cmd/wcc/wwi.ww emit byte-identical .wwi (new cross-stage byte-id substrate, rule 10). check_exported_type (drew) rides the producer entry, flag-gated: an exported signature naming a non-exported nominal is loud-rejected before any byte is written, identically on both stages. Ports harec check.c:4092-4168, recursing the type-AST and gating on the resolved SK_TYPE sym's decl export flag (Sym.exported is vestigial in both stages; the predeclared synthetic `nomem` decl carries no source position and is treated as a builtin leaf — cstage parity). Two wwstage checker AST-mutations are normalized to cstage's pristine view for byte-id: the N_TPARAM tuple-element wrapper (unwrapped) and the variadic `T...`→`[]T` param desugar (peeled). Gate 989_m2wwi_run: ascii/strings/getopt each produce a .wwi that re-parses (wwdump -a) and is cs==ww byte-identical; a private-type-leak fixture is rejected identically by both stages (non-vacuous check).
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/*
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* gc.h — w6c-private header: Prog/Adr structs, scratch register set,
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* stack-frame state. Plan 9 cmd/6c/gc.h shape, trimmed.
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*/
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#ifndef SIX_GC_H
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#define SIX_GC_H
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#include "ww.h"
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#include "6.out.h"
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typedef struct Prog Prog;
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typedef struct Adr Adr;
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/* one operand: register, immediate, indirect, or symbolic. */
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struct Adr {
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int type; /* D_AX, D_CONST, D_INDIR, ... */
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int reg; /* base register for D_INDIR */
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long long offset; /* immediate value or memory displacement */
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const char *sym; /* symbol name for D_EXTERN/D_BRANCH */
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};
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struct Prog {
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int as; /* opcode (A_MOVQ, ...) */
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Adr from; /* source operand */
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Adr to; /* destination operand (Plan 9 order) */
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int line;
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const char *label; /* if non-NULL, this prog is preceded by label: */
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Prog *link;
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};
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/* per-fn codegen state */
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typedef struct Cg Cg;
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struct Cg {
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Arena *a;
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Prog *head, *tail;
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const char *fnname;
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const char *cur_mod; /* current fn's `// MODULE: foo` directive,
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* NULL when the fn lives in the primary
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* file (no MODULE: stamp). Drives bare-IDENT
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* call mangling — `frob()` from within
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* lib/foo binds to `foo.frob` regardless
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* of which other modules also export `frob`.
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* Set by cgfn before walking the body. */
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int framesize; /* bytes of locals; 16-byte aligned */
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int curoff; /* current top of locals */
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Scope *locals; /* (name → offset) tracked via Sym */
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int labelseq;
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};
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/* cgen.c */
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void cg_init(Cg*, Arena*);
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void cg_file(Cg*, FILE *out, Node *file);
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Prog *newprog(Cg*, int op);
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void emit(Cg*, Prog*);
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/* txt.c */
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void txt_emit(FILE*, Prog *head);
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/* wwi.c — `.wwi` export-data producer (w6c -I). M2 dead-code: writes a
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* re-parseable ww-prototype rendering of the package's exported surface.
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* Returns non-zero if check_exported_type rejects a dangling export. */
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int wwi_emit(Checker *c, FILE *of, Node *file);
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/* swt.c, peep.c, reg.c — placeholders for now */
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void peephole(Cg*);
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void regalloc_init(Cg*);
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#endif
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