TIL: Unlike other targets (including the editor mono JIT), #unity IL2CPP very much does not like it when you keep things in the stack for later.
Boo:
LD, DUP, OP, OP
Woo:
LD, OP, LD, OP
Handling of the unfortunate case is _not_ very graceful: Nonsensical generated C++. Thankfully it at least doesn’t compile.