+ GenericValue Dest;
+ GenericValue Src = ECStack[VAList.UIntPairVal.first]
+ .VarArgs[VAList.UIntPairVal.second];
+ Type *Ty = I.getType();
+ switch (Ty->getTypeID()) {
+ case Type::IntegerTyID:
+ Dest.IntVal = Src.IntVal;
+ break;
+ IMPLEMENT_VAARG(Pointer);
+ IMPLEMENT_VAARG(Float);
+ IMPLEMENT_VAARG(Double);
+ default:
+ dbgs() << "Unhandled dest type for vaarg instruction: " << *Ty << "\n";
+ llvm_unreachable(nullptr);
+ }
+
+ // Set the Value of this Instruction.
+ SetValue(&I, Dest, SF);
+
+ // Move the pointer to the next vararg.
+ ++VAList.UIntPairVal.second;
+}
+
+void Interpreter::visitExtractElementInst(ExtractElementInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
+ GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
+ GenericValue Dest;
+
+ Type *Ty = I.getType();
+ const unsigned indx = unsigned(Src2.IntVal.getZExtValue());
+
+ if(Src1.AggregateVal.size() > indx) {
+ switch (Ty->getTypeID()) {
+ default:
+ dbgs() << "Unhandled destination type for extractelement instruction: "
+ << *Ty << "\n";
+ llvm_unreachable(nullptr);
+ break;
+ case Type::IntegerTyID:
+ Dest.IntVal = Src1.AggregateVal[indx].IntVal;
+ break;
+ case Type::FloatTyID:
+ Dest.FloatVal = Src1.AggregateVal[indx].FloatVal;
+ break;
+ case Type::DoubleTyID:
+ Dest.DoubleVal = Src1.AggregateVal[indx].DoubleVal;
+ break;
+ }
+ } else {
+ dbgs() << "Invalid index in extractelement instruction\n";
+ }
+
+ SetValue(&I, Dest, SF);
+}
+
+void Interpreter::visitInsertElementInst(InsertElementInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ Type *Ty = I.getType();
+
+ if(!(Ty->isVectorTy()) )
+ llvm_unreachable("Unhandled dest type for insertelement instruction");
+
+ GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
+ GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
+ GenericValue Src3 = getOperandValue(I.getOperand(2), SF);
+ GenericValue Dest;
+
+ Type *TyContained = Ty->getContainedType(0);
+
+ const unsigned indx = unsigned(Src3.IntVal.getZExtValue());
+ Dest.AggregateVal = Src1.AggregateVal;
+
+ if(Src1.AggregateVal.size() <= indx)
+ llvm_unreachable("Invalid index in insertelement instruction");
+ switch (TyContained->getTypeID()) {
+ default:
+ llvm_unreachable("Unhandled dest type for insertelement instruction");
+ case Type::IntegerTyID:
+ Dest.AggregateVal[indx].IntVal = Src2.IntVal;
+ break;
+ case Type::FloatTyID:
+ Dest.AggregateVal[indx].FloatVal = Src2.FloatVal;
+ break;
+ case Type::DoubleTyID:
+ Dest.AggregateVal[indx].DoubleVal = Src2.DoubleVal;
+ break;
+ }
+ SetValue(&I, Dest, SF);
+}
+
+void Interpreter::visitShuffleVectorInst(ShuffleVectorInst &I){
+ ExecutionContext &SF = ECStack.back();
+
+ Type *Ty = I.getType();
+ if(!(Ty->isVectorTy()))
+ llvm_unreachable("Unhandled dest type for shufflevector instruction");
+
+ GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
+ GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
+ GenericValue Src3 = getOperandValue(I.getOperand(2), SF);
+ GenericValue Dest;
+
+ // There is no need to check types of src1 and src2, because the compiled
+ // bytecode can't contain different types for src1 and src2 for a
+ // shufflevector instruction.
+
+ Type *TyContained = Ty->getContainedType(0);
+ unsigned src1Size = (unsigned)Src1.AggregateVal.size();
+ unsigned src2Size = (unsigned)Src2.AggregateVal.size();
+ unsigned src3Size = (unsigned)Src3.AggregateVal.size();
+
+ Dest.AggregateVal.resize(src3Size);
+
+ switch (TyContained->getTypeID()) {
+ default:
+ llvm_unreachable("Unhandled dest type for insertelement instruction");
+ break;
+ case Type::IntegerTyID:
+ for( unsigned i=0; i<src3Size; i++) {
+ unsigned j = Src3.AggregateVal[i].IntVal.getZExtValue();
+ if(j < src1Size)
+ Dest.AggregateVal[i].IntVal = Src1.AggregateVal[j].IntVal;
+ else if(j < src1Size + src2Size)
+ Dest.AggregateVal[i].IntVal = Src2.AggregateVal[j-src1Size].IntVal;
+ else
+ // The selector may not be greater than sum of lengths of first and
+ // second operands and llasm should not allow situation like
+ // %tmp = shufflevector <2 x i32> <i32 3, i32 4>, <2 x i32> undef,
+ // <2 x i32> < i32 0, i32 5 >,
+ // where i32 5 is invalid, but let it be additional check here:
+ llvm_unreachable("Invalid mask in shufflevector instruction");
+ }
+ break;
+ case Type::FloatTyID:
+ for( unsigned i=0; i<src3Size; i++) {
+ unsigned j = Src3.AggregateVal[i].IntVal.getZExtValue();
+ if(j < src1Size)
+ Dest.AggregateVal[i].FloatVal = Src1.AggregateVal[j].FloatVal;
+ else if(j < src1Size + src2Size)
+ Dest.AggregateVal[i].FloatVal = Src2.AggregateVal[j-src1Size].FloatVal;
+ else
+ llvm_unreachable("Invalid mask in shufflevector instruction");
+ }
+ break;
+ case Type::DoubleTyID:
+ for( unsigned i=0; i<src3Size; i++) {
+ unsigned j = Src3.AggregateVal[i].IntVal.getZExtValue();
+ if(j < src1Size)
+ Dest.AggregateVal[i].DoubleVal = Src1.AggregateVal[j].DoubleVal;
+ else if(j < src1Size + src2Size)
+ Dest.AggregateVal[i].DoubleVal =
+ Src2.AggregateVal[j-src1Size].DoubleVal;
+ else
+ llvm_unreachable("Invalid mask in shufflevector instruction");
+ }
+ break;
+ }
+ SetValue(&I, Dest, SF);
+}
+
+void Interpreter::visitExtractValueInst(ExtractValueInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ Value *Agg = I.getAggregateOperand();
+ GenericValue Dest;
+ GenericValue Src = getOperandValue(Agg, SF);
+
+ ExtractValueInst::idx_iterator IdxBegin = I.idx_begin();
+ unsigned Num = I.getNumIndices();
+ GenericValue *pSrc = &Src;
+
+ for (unsigned i = 0 ; i < Num; ++i) {
+ pSrc = &pSrc->AggregateVal[*IdxBegin];
+ ++IdxBegin;
+ }
+
+ Type *IndexedType = ExtractValueInst::getIndexedType(Agg->getType(), I.getIndices());
+ switch (IndexedType->getTypeID()) {
+ default:
+ llvm_unreachable("Unhandled dest type for extractelement instruction");
+ break;
+ case Type::IntegerTyID:
+ Dest.IntVal = pSrc->IntVal;
+ break;
+ case Type::FloatTyID:
+ Dest.FloatVal = pSrc->FloatVal;
+ break;
+ case Type::DoubleTyID:
+ Dest.DoubleVal = pSrc->DoubleVal;
+ break;
+ case Type::ArrayTyID:
+ case Type::StructTyID:
+ case Type::VectorTyID:
+ Dest.AggregateVal = pSrc->AggregateVal;
+ break;
+ case Type::PointerTyID:
+ Dest.PointerVal = pSrc->PointerVal;
+ break;
+ }
+
+ SetValue(&I, Dest, SF);
+}
+
+void Interpreter::visitInsertValueInst(InsertValueInst &I) {
+
+ ExecutionContext &SF = ECStack.back();
+ Value *Agg = I.getAggregateOperand();
+
+ GenericValue Src1 = getOperandValue(Agg, SF);
+ GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
+ GenericValue Dest = Src1; // Dest is a slightly changed Src1
+
+ ExtractValueInst::idx_iterator IdxBegin = I.idx_begin();
+ unsigned Num = I.getNumIndices();
+
+ GenericValue *pDest = &Dest;
+ for (unsigned i = 0 ; i < Num; ++i) {
+ pDest = &pDest->AggregateVal[*IdxBegin];
+ ++IdxBegin;
+ }
+ // pDest points to the target value in the Dest now
+
+ Type *IndexedType = ExtractValueInst::getIndexedType(Agg->getType(), I.getIndices());
+
+ switch (IndexedType->getTypeID()) {
+ default:
+ llvm_unreachable("Unhandled dest type for insertelement instruction");
+ break;
+ case Type::IntegerTyID:
+ pDest->IntVal = Src2.IntVal;
+ break;
+ case Type::FloatTyID:
+ pDest->FloatVal = Src2.FloatVal;
+ break;
+ case Type::DoubleTyID:
+ pDest->DoubleVal = Src2.DoubleVal;
+ break;
+ case Type::ArrayTyID:
+ case Type::StructTyID:
+ case Type::VectorTyID:
+ pDest->AggregateVal = Src2.AggregateVal;
+ break;
+ case Type::PointerTyID:
+ pDest->PointerVal = Src2.PointerVal;
+ break;
+ }
+
+ SetValue(&I, Dest, SF);
+}
+
+GenericValue Interpreter::getConstantExprValue (ConstantExpr *CE,
+ ExecutionContext &SF) {
+ switch (CE->getOpcode()) {
+ case Instruction::Trunc:
+ return executeTruncInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::ZExt:
+ return executeZExtInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::SExt:
+ return executeSExtInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::FPTrunc:
+ return executeFPTruncInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::FPExt:
+ return executeFPExtInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::UIToFP:
+ return executeUIToFPInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::SIToFP:
+ return executeSIToFPInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::FPToUI:
+ return executeFPToUIInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::FPToSI:
+ return executeFPToSIInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::PtrToInt:
+ return executePtrToIntInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::IntToPtr:
+ return executeIntToPtrInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::BitCast:
+ return executeBitCastInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::GetElementPtr:
+ return executeGEPOperation(CE->getOperand(0), gep_type_begin(CE),
+ gep_type_end(CE), SF);
+ case Instruction::FCmp:
+ case Instruction::ICmp:
+ return executeCmpInst(CE->getPredicate(),
+ getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::Select:
+ return executeSelectInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ getOperandValue(CE->getOperand(2), SF),
+ CE->getOperand(0)->getType());
+ default :
+ break;
+ }
+
+ // The cases below here require a GenericValue parameter for the result
+ // so we initialize one, compute it and then return it.
+ GenericValue Op0 = getOperandValue(CE->getOperand(0), SF);
+ GenericValue Op1 = getOperandValue(CE->getOperand(1), SF);
+ GenericValue Dest;
+ Type * Ty = CE->getOperand(0)->getType();
+ switch (CE->getOpcode()) {
+ case Instruction::Add: Dest.IntVal = Op0.IntVal + Op1.IntVal; break;
+ case Instruction::Sub: Dest.IntVal = Op0.IntVal - Op1.IntVal; break;
+ case Instruction::Mul: Dest.IntVal = Op0.IntVal * Op1.IntVal; break;
+ case Instruction::FAdd: executeFAddInst(Dest, Op0, Op1, Ty); break;
+ case Instruction::FSub: executeFSubInst(Dest, Op0, Op1, Ty); break;
+ case Instruction::FMul: executeFMulInst(Dest, Op0, Op1, Ty); break;
+ case Instruction::FDiv: executeFDivInst(Dest, Op0, Op1, Ty); break;
+ case Instruction::FRem: executeFRemInst(Dest, Op0, Op1, Ty); break;
+ case Instruction::SDiv: Dest.IntVal = Op0.IntVal.sdiv(Op1.IntVal); break;
+ case Instruction::UDiv: Dest.IntVal = Op0.IntVal.udiv(Op1.IntVal); break;
+ case Instruction::URem: Dest.IntVal = Op0.IntVal.urem(Op1.IntVal); break;
+ case Instruction::SRem: Dest.IntVal = Op0.IntVal.srem(Op1.IntVal); break;
+ case Instruction::And: Dest.IntVal = Op0.IntVal & Op1.IntVal; break;
+ case Instruction::Or: Dest.IntVal = Op0.IntVal | Op1.IntVal; break;
+ case Instruction::Xor: Dest.IntVal = Op0.IntVal ^ Op1.IntVal; break;
+ case Instruction::Shl:
+ Dest.IntVal = Op0.IntVal.shl(Op1.IntVal.getZExtValue());
+ break;
+ case Instruction::LShr:
+ Dest.IntVal = Op0.IntVal.lshr(Op1.IntVal.getZExtValue());
+ break;
+ case Instruction::AShr:
+ Dest.IntVal = Op0.IntVal.ashr(Op1.IntVal.getZExtValue());
+ break;
+ default:
+ dbgs() << "Unhandled ConstantExpr: " << *CE << "\n";
+ llvm_unreachable("Unhandled ConstantExpr");
+ }
+ return Dest;
+}
+
+GenericValue Interpreter::getOperandValue(Value *V, ExecutionContext &SF) {
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
+ return getConstantExprValue(CE, SF);
+ } else if (Constant *CPV = dyn_cast<Constant>(V)) {
+ return getConstantValue(CPV);
+ } else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
+ return PTOGV(getPointerToGlobal(GV));
+ } else {
+ return SF.Values[V];
+ }