syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"LLVMAtomicRMWBinOpUSubCond,"}]}
source_snippet:     LLVMAtomicRMWBinOpUSubCond,
context_before:     /// Subtracts the value only if no unsigned overflow.
context_after:     /// Subtracts the value, clamping to zero.