syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // need a cast since we want to pass the float as an int).
context_before:         // currently just have to way to combine a `PassMode::Cast` with that optimization (and we
context_after:         if arg.layout.size.bits() <= target.pointer_width.into() {