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w6c+w6c_ww: tagged-union struct-lit payload fills via the canonical fill (#23)

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The widen choke-point's struct-payload arm carried its own inline
N_STRUCTLIT field loop -- a parallel fill that drifted from
cg_structlit_fill/cgstructlitfill: no tagged-field widen arm, so a
(void|T)-typed field's raw scalar landed in the field's TAG word
(silent truncation past the first tagged field, both stages,
byte-id, gate-blind; prober-9 PG5). Delete both loops and delegate
to the canonical fill at the payload base: one fill path, one widen
path, mutually recursive. Inherits the nested-struct/call/arrlit
field arms and closes a latent fsz==2 cs!=ww (old ww loop's
fieldstoreop MOVW vs cstage MOVQ). Test 938: 15-row table-driven
runtime readback (incl. ellipsis autofill, offset-0 tagged field,
(void|str) payload, 3-level widen-fill recursion torture), all 13
bug rows silent-fail at master 6699158; 2 rows skip the byte-id
check loudly (pre-existing match-on-tagged-FIELD readback cs!=ww,
master-confirmed, separate family).
This commit is contained in:
Hojun-Cho
2026-06-05 02:07:49 +09:00
parent 66991585d6
commit 413aafa599
6 changed files with 629 additions and 202 deletions
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7
Makefile
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@@ -309,6 +309,7 @@ TESTS = $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
$(BIN)/test_tuple_in_union_run \
$(BIN)/test_tuple_slot_layout_run \
$(BIN)/test_tagged_tuple_widen_run \
$(BIN)/test_tagged_structlit_payload_run \
$(BIN)/test_forrange_fieldbase_run \
$(BIN)/test_errtype_compare \
$(BIN)/test_tuple_elem_slice_len_run \
@@ -1471,6 +1472,12 @@ $(BIN)/test_tagged_tuple_widen_run: test/wcc/936_tagged_tuple_widen_run.c \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_tagged_structlit_payload_run: test/wcc/938_tagged_structlit_payload_run.c \
$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
$(BIN)/ww_ww $(BIN)/w6c_ww $(BIN)/w6a_ww $(BIN)/w6l_ww \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_forrange_fieldbase_run: test/wcc/937_forrange_fieldbase_run.c \
$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
$(BIN)/ww_ww $(BIN)/w6c_ww $(BIN)/w6a_ww $(BIN)/w6l_ww \