Drew T
2.3 KiB
§75a — The exclusion classes, enumerated with named causes (Phase 29 SESSION-19, the 134-binary dedup_extend sweep)
After the §75 normalization, one dedup_extend --binaries <134> sweep banked 134/400 planned and
the two residual groups failed in every binary — with harvest_verify's classifier naming a
different cause for each. That enumeration is the useful artifact: "propagation-capped" is not one
class, it is at least three, and only the first is cheap.
| class | cc1/ld says | example | remedy | cost |
|---|---|---|---|---|
| A — minority spelling (§75) | conflicting types for <callee> where one spelling dominates the census |
func_8014F468: 1,710 s32 vs 4 void defs |
normalize the minority, byte-gate, dedup_extend |
cheap, byte-neutral |
| B — genuine arity/type split | same message, but the census shows two real populations | func_8012F14C: 1,944 (s32) vs 968 (s32,s32,s32) |
NOT a typo — two live call conventions. The §29 loose-typing wall. A K&R () in the macro may be compatible with both (compatible(): () first + prototype second is ACCEPTED when no param default-promotes, and s32 does not) — but it is order-dependent, so it only works if the macro's decl precedes the TU's. Measure before moving. |
unknown — probe first |
| C — missing carried extern | undefined reference to '<sym>' (a LINK error, not a type error) |
func_80165CA0: undefined reference to 'SHB' |
the SESSION-18 CARRY-FIXABLE class — the body references a file-scope decl the extraction did not carry | cheap once carried |
The discriminator is one grep, and it decides the whole remedy: census every spelling of the symbol cc1 named. A lopsided count (≥95/5) is class A — normalize. Two substantial populations is class B — do not normalize on a guess; an arity change is not byte-neutral by inspection (§29's narrow-param wall is exactly this). A link error is class C and has nothing to do with types.
Do not generalize from one member's error. The same blocked function reported different callees
in different overlays (func_80012ABC at ov_SC01_000, func_8012F14C at ov_SC01_001) — so one
sample names one blocker, not the blocker set. Collect the classifier's line across the whole sweep
before scoping the fix.