chore(codegen): drop the object-cache field and doc claim that outlived setjmp

changelog.d/7312-drop-orphaned-setjmp-state.md

@@ -0,0 +1,15 @@
+#7302/#7305 replaced setjmp/longjmp exception lowering with `invoke`/`landingpad`
+and deleted `volatile_setjmp.rs`. Two references to that machinery outlived it:
+
+- `PERRY_SETJMP_VOLATILE` was still hashed into the object-cache key. The pass it
+  gated no longer exists, so the field could never vary — dead state in a cache
+  key, plus a test asserting its presence. Both removed. (Object-cache keys shift
+  once as a result; the next build repopulates.)
+- `native_emit.rs`'s module doc still claimed `has_try` functions render text
+  "whose setjmp volatile pass needs whole-function analysis". That pass is gone
+  and no such exception remains. Reworded to record the history rather than
+  assert a present-tense behaviour that is no longer true.
+
+The `_setjmp` link in `perry-ext-fastify` is deliberate and untouched — #7305
+keeps the private Rust-side boundary trap, since Rust cannot catch a foreign
+exception.

crates/perry-codegen/src/native_emit.rs

@@ -25,8 +25,10 @@
 //! per-line stream including entry-alloca hoists, boundary splices and
 //! return-site rewrites, shared with `to_ir` so those transforms have
 //! exactly one implementation. No per-function text is materialized on this
-//! path; the exception is `has_try` functions, whose setjmp volatile pass
-//! needs whole-function analysis and therefore still renders text. What
+//! path. (Until #7302 `has_try` functions were an exception, because the
+//! setjmp volatile pass needed whole-function analysis and forced a text
+//! render; invoke/landingpad deleted that pass, so no such exception
+//! remains.) What
 //! stops existing everywhere is the module-scale concatenation and the
 //! full-grammar LLVM parse. The follow-up (typed `LlInst` variants) removes
 //! the remaining per-LINE formatting; the `instructions=` counter logged per

crates/perry/src/commands/compile/object_cache.rs

@@ -906,10 +906,6 @@ fn compute_object_cache_key_with_env(
         "env_codegen_unit_size",
         env_var("PERRY_CODEGEN_UNIT_SIZE").as_deref().unwrap_or(""),
     );
-    h.field(
-        "env_setjmp_volatile",
-        env_var("PERRY_SETJMP_VOLATILE").as_deref().unwrap_or(""),
-    );
     h.field(
         "env_gc_moving_loop_polls",
         env_var("PERRY_GC_MOVING_LOOP_POLLS")

crates/perry/src/commands/compile/object_cache/object_cache_tests.rs

@@ -603,7 +603,6 @@ fn key_changes_with_codegen_env_vars() {
         "PERRY_ENTRY_SYMBOL",
         "PERRY_CODEGEN_UNITS",
         "PERRY_CODEGEN_UNIT_SIZE",
-        "PERRY_SETJMP_VOLATILE",
         "PERRY_GC_MOVING_LOOP_POLLS",
         // Inline-hot-small (#6850 follow-up).
         "PERRY_INLINE_HOT_SMALL",