nx_cc_equiv_gate.nx

nx_cc_equiv_gate.nx -- COMPILER DIFFERENTIAL-BEHAVIOR ORACLE: miscompile-detection for the sovereign toolchain (EMI-style baseline-vs-challenger build + stdout byte-equal + self-host stage). Team organ (Engineer-owned) born from the dom/licm dormant-paths discovery (ledger T#opt-dom-licm-dormant-paths, 2026-06-10): the deref-cast precedence bug had silently disabled 4 optimizer reads since they were written, and AWAKENING them broke the self-host at generation 3 -- a class of defect no single-binary test catches. This gate judges ANY compiler mutation by BEHAVIOR, not by asm: For each corpus row (deterministic, network-free modules): build with BASELINE cc -> run -> raw wait4 status + stdout bytes build with CHALLENGER cc -> run -> same row PASS iff both build, statuses EQUAL, stdout BYTE-EQUAL. (Different codegen/hoisting is fine; different BEHAVIOR is not.) SELF-HOST stage (the gen3-class catch): challenger compiles runtime/nx_compile_x86.nx -> gen2 binary; gen2 must then compile a probe module whose binary runs exit 0. This is exactly where the awakened-LICM breakage surfaced (gen3: "unknown type name 'nx_size'"). Usage: nx_cc_equiv_gate [challenger_elf] challenger default: /tmp/cc_challenger.elf baseline (always): _offc/nx_compile_x86_native.elf Run with CWD=nxc2/. Exit 0 iff all rows + self-host PASS. Verdicts stream to stdout AND append to the durable log knowledge/status/cc_equiv_gate.log (Archivist rule). ORCHESTRATION is pure NishiLang fork/dup3/execve/wait4 -- the sovereign exit-judging law (no shell, no $?). license_tier: ORIGINAL