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selfhost+cstage+test: graduate *[]T indexing to slice-element type (#20)

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Cstage and wwstage share the latent: check.c's N_INDEX bespoke
TY_PTR-over-TY_SLICE clause peeled the slice in `*[]T[i]` and
returned the element of the element, while wwstage's elemsizeof
had no N_TSLICE arm for the post-N_TPTR-peel elem and fell to
the 8B catch-all. Splitting leaves one stage broken on the
exact `*[]T[i]` shape the new 754 sentinel asserts byte-identical
between stages (rule 11). The companion 24B per-element copy
emit is a separate codegen wedge already pinned inline at
cmd/w6c/cgen.c:6518; out-of-scope here and noted in the fixture
header.
This commit is contained in:
Hojun-Cho
2026-05-19 12:30:36 +09:00
parent 02ada29624
commit f0b8c25b29
6 changed files with 261 additions and 1 deletions
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7
Makefile
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@@ -288,6 +288,7 @@ TESTS = $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
$(BIN)/test_vararg_seq_percall \
$(BIN)/test_modparam_callee \
$(BIN)/test_convwrap_audit \
$(BIN)/test_slice_of_slice_index \
$(BIN)/test_param_shadow_mod \
$(BIN)/test_localoff_scope \
$(BIN)/test_cast_enum_movl \
@@ -741,6 +742,12 @@ $(BIN)/test_convwrap_audit: test/wcc/753_convwrap_audit.c \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_slice_of_slice_index: test/wcc/754_slice_of_slice_index.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_match_4arm_cross_module_run: test/wcc/929_match_4arm_cross_module_run.c \
$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
$(BIN)/ww_ww $(BIN)/w6c_ww $(BIN)/w6a_ww $(BIN)/w6l_ww \