syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// Only valid for zext instructions.
context_before:     ///
context_after:     pub fn LLVMSetNNeg(NonNegInst: LLVMValueRef, IsNonNeg: LLVMBool);