llvm-x

NodeJS Bindings for LLVM

Requires LLVM 3.2:

Ubuntu: sudo apt-get install libllvm3.2 llvm-3.2-dev
Fedora: sudo yum install llvm llvm-devel llvm-static

• Wraps the most important LLVM APIs.
• A port of the LLVM Kaleidoscope example can be found in examples/. Expressions must be entered on a single line.
• Uses Node-FFI to make JIT functions callable from JS.
• Currently does not free LLVM objects' memory when a Module is GC'd.

API: llvm

For details, see the LLVM C++ API documentation and Reference Manual.

llvm = require('llvm')

.globalContext

Context

.voidTy
.labelTy
.floatTy
.doubleTy
.metadataTy
.x86_FP80Ty
.fP128Ty
.pPC_FP128Ty
.x86_MMXTy
.int1Ty
.int8Ty
.int16Ty
.int32Ty
.int64Ty

.getFunctionType(returnType, argTypes)
.getIntNTy(width)

Module

new llvm.module(id, context)

.context
.moduleIdentifier

.getFunction(name)
.getOrInsertFunction(name, funcType)
.dump()

Value

.parent
.name [r/w]
.dump()

Function

Inherits Value

.module
.context
.functionType
.arguments -- modifications to the array are not reflected in the LLVM structure
.basicBlocks -- modifications to the array are not reflected in the LLVM structure

.dump()
.addBasicBlock(nameOrBlock) - adds an existing block, or creates one if passed a string name. Returns the added block.

BasicBlock

Inherits Value

new llvm.BasicBlock(context)

.context

Type

.getPointerTo() -- PointerType to this type

IntegerType

Inherits Type

.const(val, [radix]) -- Get ConstantInteger from JS number or string and radix

FPType

Inherits Type

.const(val) -- Get ConstantFP from JS number or string

FunctionType

Inherits Type

IRBuilder

new llvm.IRBuilder(context)

.setInsertPoint(block)
.insertBlock -- the current insertion point block

The following methods create an instruction and add it at the current insertion point, returning the instruction's value:

.createRet(val)
.createRetVoid()
.createBr(destBlock)
.createCondBr(cond, destT, destF)
.createSwitch(V, defaultBlock) -- creates SwitchInst with .addCase(value, block) and .setDefaultDest(block)
.createUnreachable()
.createCall(func, args)
.createAlloca(type, [arraySize], [name])
.createLoad(ptr, [name])
.createStore(val, ptr, [name])
.createGEP(ptr, idxList, [name])
.createPHI(type, [name]) -- creates PHINode with .addIncoming(block, value)
.createSelect(cond, vTrue, vFalse)

.createAdd(l, r, [name], [hasNUW], [hasNSW])
.createSub(l, r, [name], [hasNUW], [hasNSW])
.createMul(l, r, [name], [hasNUW], [hasNSW])
.createShl(l, r, [name], [hasNUW], [hasNSW])

.createUDiv(l, r, [name], [isExact])
.createSDiv(l, r, [name], [isExact])
.createLShr(l, r, [name], [isExact])
.createAShr(l, r, [name], [isExact])

.createNSWAdd(l, r, [name])
.createNUWAdd(l, r, [name])
.createFAdd(l, r, [name])
.createNSWSub(l, r, [name])
.createNUWSub(l, r, [name])
.createFSub(l, r, [name])
.createNSWMul(l, r, [name])
.createNUWMul(l, r, [name])
.createFMul(l, r, [name])
.createExactUDiv(l, r, [name])
.createExactSDiv(l, r, [name])
.createFDiv(l, r, [name])
.createURem(l, r, [name])
.createSRem(l, r, [name])
.createFRem(l, r, [name])
.createAnd(l, r, [name])
.createOr(l, r, [name])
.createXor(l, r, [name])

.createICmpEQ(l, r, [name])
.createICmpNE(l, r, [name])
.createICmpUGT(l, r, [name])
.createICmpUGE(l, r, [name])
.createICmpULT(l, r, [name])
.createICmpULE(l, r, [name])
.createICmpSGT(l, r, [name])
.createICmpSGE(l, r, [name])
.createICmpSLT(l, r, [name])
.createICmpSLE(l, r, [name])
.createFCmpOEQ(l, r, [name])
.createFCmpOGT(l, r, [name])
.createFCmpOGE(l, r, [name])
.createFCmpOLT(l, r, [name])
.createFCmpOLE(l, r, [name])
.createFCmpONE(l, r, [name])
.createFCmpORD(l, r, [name])
.createFCmpUNO(l, r, [name])
.createFCmpUEQ(l, r, [name])
.createFCmpUGT(l, r, [name])
.createFCmpUGE(l, r, [name])
.createFCmpULT(l, r, [name])
.createFCmpULE(l, r, [name])
.createFCmpUNE(l, r, [name])

.createNSWNeg(v, [name])
.createNUWNeg(v, [name])
.createFNeg(v, [name])
.createNot(v, [name])
.createIsNull(v, [name])
.createIsNotNull(v, [name])

.createTrunc(v, type, [name])
.createZExt(v, type, [name])
.createSExt(v, type, [name])
.createFPToUI(v, type, [name])
.createFPToSI(v, type, [name])
.createUIToFP(v, type, [name])
.createSIToFP(v, type, [name])
.createFPTrunc(v, type, [name])
.createFPExt(v, type, [name])
.createPtrToInt(v, type, [name])
.createIntToPtr(v, type, [name])
.createBitCast(v, type, [name])
.createZExtOrBitCast(v, type, [name])
.createSExtOrBitCast(v, type, [name])
.createTruncOrBitCast(v, type, [name])
.createPointerCast(v, type, [name])
.createFPCast(v, type, [name])

PHINode

Inherits Value

.addIncoming(value, block)

SwitchInst

.addCase(value, block)
.setDefaultDest(block)

FunctionPassManager

new llvm.FunctionPassManager(module)

.doInitialization()
.doFinalization()
.run(function)

The following methods create and add an llvm::Pass to the PassManager:

.addDataLayoutPass(dataLayout)
.addBasicAliasAnalysisPass()
.addInstructionCombiningPass()
.addReassociatePass()
.addGVNPass()

ExecutionEngine

new llvm.ExecutionEngine(module)

.getPointerToFunction(fnName) -- Get 0-byte Buffer at the JIT'd function's address.
.getFFIFunction(fnName) -- Wrap the compiled function with the FFI library, returning a JavaScript callable.