Hojun-Cho
003f707618
Use the new DATAR mechanism so str-literal init on a top-level mutable `let` lands in .data and links cleanly. emit_lets, when it sees `let s: str = "lit"` (non-empty strlit), emits: DATAW s(SB),"<8 zero placeholder><8 LE bytes of len>" DATAR s+0(SB),<strlit_label>(SB) The linker patches the placeholder with the strlit's runtime VA at program load time, so `s.ptr` reads as the real pointer and `s.len` as the literal length. A new let_pre_intern pass scans top-level lets ahead of emit_data so the strlit gets a DATA row in the same .s file; running emit_lets after emit_data instead would have flipped the (DATA strlits, DATAW lets) section order in the .s and broken byte-identity with the wwstage cgen. The wwstage cgen still emits the zero-init shape for str lets, which only matters if the wwstage is asked to compile source that uses str-literal init. None of the selfhost combined sources do that today, so test 994 / 990 stay green. The selfhost mirror for DATAR + DATAW + this w6c branch is a follow-up. 630_let_global gains two fixtures: a length-readback and a first- byte readback through the patched ptr.