@Override
			public void generateDeclCode(MethodVisitor mv, String nameThis, Label startLocals,
					Label endLocals) {
				super.generateDeclCode(mv, nameThis, startLocals, endLocals);
				mv.visitLdcInsn(0);
				mv.visitVarInsn(ISTORE, index());
			}
We declare a local variable to indicate that a context-modifying userop has been invoked.
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/emu/jit/analysis/JitAllocationModel.java