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wcc/cgen: #146 wwstage str ==/!= via rt_streq, not ptr-only CMPQ (the #154 ww-twin)

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wwstage compiled str ==/!= as a single CMPQ on the eager-eval'd ptr word
(len ignored), so two distinct-pointer equal-content strings compared
unequal. cstage was already correct (CALLs rt_streq, the #154 cbinop fix).
The wwstage cgbin had no str-awareness -- every comparison fell to the
generic CMPQ tail; the #154 fix was never mirrored.

wwstage-only: a cgstreqpush helper + a str ==/!= branch at the top of
cgbin (before the generic eval collapses the header), byte-matching cstage
cbinop:4564-4623 -- push rhs/lhs (len,ptr), POPQ DI/SI/DX/CX, CALL
rt_streq, XORQ $1 for !=. Gated on typeisstr (= cstage node_isstr, which
also catches module-global str idents). cstage cgen unchanged (w6c md5
unchanged). The str== .s is byte-identical cs==ww for local, global,
aliased, chained, and condition operands.

Graduates 3 lib byte-id pins (test/wcc/989_lib_byteid #59.1 asciitest,
#59.11 toktest, #59.12 asttest) M_DIVERGE->M_ID -- they used == on str and
were pinned divergent because of this bug; now byte-identical. byte-id
990-997 8/8. test/wcc/827 table-driven.
This commit is contained in:
Hojun-Cho
2026-06-08 23:49:16 +09:00
parent 83025b03a6
commit 5dd239d01e
6 changed files with 496 additions and 3 deletions
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7
Makefile
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@@ -255,6 +255,7 @@ TESTS = $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
$(BIN)/test_inferred_float_global \
$(BIN)/test_errfirst_union_try \
$(BIN)/test_alias_tuple_coerce \
$(BIN)/test_str_eq \
$(BIN)/test_slice_str_global_zero \
$(BIN)/test_slice_literal_global \
$(BIN)/test_global_arr_elem_field \
@@ -693,6 +694,12 @@ $(BIN)/test_alias_tuple_coerce: test/wcc/826_alias_tuple_coerce.c $(BIN)/ww \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_str_eq: test/wcc/827_str_eq.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_def_arr_infer_len: test/wcc/814_def_arr_infer_len.c $(BIN)/ww \
$(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
$(BIN)/ww_ww $(BIN)/w6c_ww $(BIN)/w6a_ww $(BIN)/w6l_ww \