From f208e017f200a7912cf172cfbb9849ed0214cf2f Mon Sep 17 00:00:00 2001
From: Max Bernstein <max@bernsteinbear.com>
Date: Thu, 12 Jun 2025 15:17:50 -0700
Subject: ZJIT: Add codegen for SideExit

---
 zjit/src/codegen.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/zjit/src/codegen.rs b/zjit/src/codegen.rs
index 8ced09d40a..dd04e60602 100644
--- a/zjit/src/codegen.rs
+++ b/zjit/src/codegen.rs
@@ -278,6 +278,7 @@ fn gen_insn(cb: &mut CodeBlock, jit: &mut JITState, asm: &mut Assembler, functio
         Insn::SetGlobal { id, val, state: _ } => gen_setglobal(asm, *id, opnd!(val)),
         Insn::GetGlobal { id, state: _ } => gen_getglobal(asm, *id),
         Insn::SetIvar { self_val, id, val, state: _ } => gen_setivar(asm, opnd!(self_val), *id, opnd!(val)),
+        Insn::SideExit { state } => return gen_side_exit(jit, asm, &function.frame_state(*state)),
         _ => {
             debug!("ZJIT: gen_function: unexpected insn {:?}", insn);
             return None;
@@ -337,6 +338,12 @@ fn gen_setglobal(asm: &mut Assembler, id: ID, val: Opnd) -> Opnd {
     )
 }
 
+/// Side-exit into the interpreter
+fn gen_side_exit(jit: &mut JITState, asm: &mut Assembler, state: &FrameState) -> Option<()> {
+    asm.jmp(side_exit(jit, state)?);
+    Some(())
+}
+
 /// Compile an interpreter entry block to be inserted into an ISEQ
 fn gen_entry_prologue(asm: &mut Assembler, iseq: IseqPtr) {
     asm_comment!(asm, "ZJIT entry point: {}", iseq_get_location(iseq, 0));
-- 
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