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wcc/ww: under-length array-literal tail zero-fills

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The unspecified tail of a short array literal repeated the last value
instead of zeroing — wwstage only (cstage already zeroes; the review's
both-stages reading didn't survive ground truth). Zero-fill the tail
per the zero-value semantics ruling. Review item #13.
This commit is contained in:
Hojun-Cho
2026-06-13 00:17:57 +09:00
parent 94a55c565f
commit ffb858bba6
5 changed files with 214 additions and 9 deletions
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11
Makefile
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@@ -253,6 +253,7 @@ TESTS = $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
$(BIN)/test_chainidx_run \
$(BIN)/test_tupfieldsize_run \
$(BIN)/test_tagtupfieldsize_run \
$(BIN)/test_arrlit_tail_zero_run \
$(BIN)/test_gunsigned_run \
$(BIN)/test_taggedidx_run \
$(BIN)/test_fnptrcollide_run \
@@ -712,6 +713,16 @@ $(BIN)/test_tagtupfieldsize_run: test/wcc/989_tagtupfieldsize_run.c \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
# 989_arrlit_tail_zero_run (#13): an under-length array literal zero-fills the
# unspecified tail, not the last value. Builds+runs on BOTH driver twins
# (rule-10), pinning the absolute value (pre-fix ww tail = last value).
$(BIN)/test_arrlit_tail_zero_run: test/wcc/989_arrlit_tail_zero_run.c \
$(BIN)/ww $(BIN)/ww_ww \
$(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
$(BIN)/w6c_ww $(BIN)/w6a_ww $(BIN)/w6l_ww \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
# 989_gunsigned_run (F7-c5, #25): a module-global unsigned ident on the
# divide/shift/relational path must pick the unsigned opcode. Builds+runs on
# BOTH driver twins (rule-10). CLASS-M — see the test header.