syntax_data: {"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // indirection. This means we lose the nice "pass it as two arguments" optimization, but we
context_before:         // registers). So we pass small things in integer registers and large things via pointer
context_after:         // currently just have to way to combine a `PassMode::Cast` with that optimization (and we