static void generateExitCode(JitCodeGenerator gen, Address exit, JitBlock block,
			MethodVisitor rv) {
		generateRetireCode(gen, exit, null, block, rv);
		rv.visitInsn(ACONST_NULL);
		rv.visitInsn(ARETURN);
	}
Generate code to retire the variables, write a given pc value, and return from the passage.

<p>
This will not write any decode context.

@param gen the code generator
@param exit the pc value to write
@param block the block containing the op
@param rv the run method visitor
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/emu/jit/gen/op/BranchOpGen.java