| LabelType | LLVM.AST.Type, LLVM.AST |
| LandingPad | LLVM.AST.Instruction, LLVM.AST |
| LandingPadClause | LLVM.AST.Instruction, LLVM.AST |
| Largest | LLVM.AST.COMDAT |
| last | LLVM.Prelude |
| lcm | LLVM.Prelude |
| Left | LLVM.Prelude |
| leftBiasedZip | LLVM.Prelude |
| length | LLVM.Prelude |
| lex | LLVM.Prelude |
| liftA | LLVM.Prelude |
| liftA2 | LLVM.Prelude |
| liftA3 | LLVM.Prelude |
| liftIRState | LLVM.IRBuilder.Monad, LLVM.IRBuilder |
| liftM | LLVM.Prelude |
| liftM2 | LLVM.Prelude |
| liftM3 | LLVM.Prelude |
| liftM4 | LLVM.Prelude |
| liftM5 | LLVM.Prelude |
| liftModuleState | LLVM.IRBuilder.Module, LLVM.IRBuilder |
| lines | LLVM.Prelude |
| LineTablesOnly | LLVM.AST.Operand |
| Linkage | LLVM.AST.Linkage |
| linkage | LLVM.AST.Global |
| LinkOnce | LLVM.AST.Linkage |
| LinkOnceODR | LLVM.AST.Linkage |
| LittleEndian | LLVM.AST.DataLayout |
| Load | LLVM.AST.Instruction, LLVM.AST |
| load | LLVM.IRBuilder.Instruction, LLVM.IRBuilder |
| LocalAddr | LLVM.AST.Global, LLVM.AST |
| LocalDynamic | LLVM.AST.ThreadLocalStorage |
| LocalExec | LLVM.AST.ThreadLocalStorage |
| LocalReference | LLVM.AST.Operand, LLVM.AST |
| LocalVariable | LLVM.AST.Operand |
| Location | LLVM.AST.Operand |
| log | LLVM.Prelude |
| logBase | LLVM.Prelude |
| lookup | LLVM.Prelude |
| LShr | |
| 1 (Data Constructor) | LLVM.AST.Constant |
| 2 (Data Constructor) | LLVM.AST.Instruction, LLVM.AST |
| lshr | LLVM.IRBuilder.Instruction, LLVM.IRBuilder |
| LT | LLVM.Prelude |
| LValueReference | LLVM.AST.Operand |