Step: V3 compiler corpus run (gm2 testsuite)

Tag v3-corpus-run. V3 suite 151/151, fixpoint OK (unchanged — this only adds a harness and a doc).

Why

The TopSpeed corpus validated the sidecar grammar, not V3 the compiler (the sidecar is a separate TSM2 binary built from TopSpeed-V3-M2.atg; it reuses V3's SymTab/QbeGen/FileIO sources but never runs compiler/M2). So this step runs V3 itself over a real standard-Modula-2 corpus: the gm2 testsuite testsuite/gm2/pim/pass and testsuite/gm2/iso/run/pass.

Harness: tools/v3-corpus/corpus.sh (copies each file to a scratch tree, compiles alone, splits failures into CRASH / LIB / LANG — see its README).

Baseline

	files
total	612
compile-OK (0 errors)	219
CRASH (M2 died, rc ≥ 128)	7
LIB (imports a gm2 library V3 lacks)	182
LANG (real V3 gap)	204

So ~182 of the 393 failures are simply missing gm2 libraries (StrIO, NumberIO, STextIO, SWholeIO, FpuIO, WholeStr, StdIO, M2RTS, DynamicStrings, Processes, …) — expected, not language gaps. The signal is the 204 LANG files.

Top LANG gaps (from the corpus)

7 crashes — all set-related: largeset, program2, set9, sets3, smallset4/5/6. Real bugs (segfaults), highest priority.
48 not supported yet — deliberate V3 230s; the corpus shows which constructs matter, e.g. array constructors (array {'h','e','l','l','o'} in arrayconst1).
79 undeclared identifier — mostly SYSTEM facilities V3 does not expose (FROM SYSTEM IMPORT BYTE; → BYTE), plus small library holes.
Anchored subranges INTEGER [-1 .. 24] (array2, array3) — PIM form V3's Subrange does not parse (';' expected at [).
Unnamed parameters in procedure types (PROCEDURE (VAR ARRAY OF REAL) in another.mod) — PIM allows them; V3 requires a name (ident expected).
Assorted: incompatible assignment/comparison on char arrays, invalid ArrayType, invalid call, FOR … BY, etc.

Reproduce

cd tools/v3-corpus
./corpus.sh            # -> 219 compile-OK / 7 CRASH / 182 LIB / 204 LANG

Suggested next steps

Fix the 7 set crashes (a correctness bug — a compiler must not segfault on valid input).
SYSTEM facilities: expose at least BYTE / WORD / SHORTADDR etc. so FROM SYSTEM IMPORT … works.
Anchored subranges T[lo..hi] (small grammar addition).
Unnamed proc-type parameters (small grammar addition).
Array constructors array{…} (bigger: codegen).

Files

tools/v3-corpus/{corpus.sh,README.md}, this doc.

summary_v3-corpus.md 2.7 KB Historik Rå