61 lines · cpp
1//===-- OpDescriptor.cpp --------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "llvm/FuzzMutate/OpDescriptor.h"10#include "llvm/IR/Constants.h"11#include "llvm/Support/CommandLine.h"12 13using namespace llvm;14using namespace fuzzerop;15 16static cl::opt<bool> UseUndef("use-undef",17 cl::desc("Use undef when generating programs."),18 cl::init(false));19 20void fuzzerop::makeConstantsWithType(Type *T, std::vector<Constant *> &Cs) {21 if (auto *IntTy = dyn_cast<IntegerType>(T)) {22 uint64_t W = IntTy->getBitWidth();23 Cs.push_back(ConstantInt::get(IntTy, 0));24 Cs.push_back(ConstantInt::get(IntTy, 1));25 Cs.push_back(ConstantInt::get(IntTy, 42));26 Cs.push_back(ConstantInt::get(IntTy, APInt::getMaxValue(W)));27 Cs.push_back(ConstantInt::get(IntTy, APInt::getMinValue(W)));28 Cs.push_back(ConstantInt::get(IntTy, APInt::getSignedMaxValue(W)));29 Cs.push_back(ConstantInt::get(IntTy, APInt::getSignedMinValue(W)));30 Cs.push_back(ConstantInt::get(IntTy, APInt::getOneBitSet(W, W / 2)));31 } else if (T->isFloatingPointTy()) {32 auto &Ctx = T->getContext();33 auto &Sem = T->getFltSemantics();34 Cs.push_back(ConstantFP::get(Ctx, APFloat::getZero(Sem)));35 Cs.push_back(ConstantFP::get(Ctx, APFloat(Sem, 1)));36 Cs.push_back(ConstantFP::get(Ctx, APFloat(Sem, 42)));37 Cs.push_back(ConstantFP::get(Ctx, APFloat::getLargest(Sem)));38 Cs.push_back(ConstantFP::get(Ctx, APFloat::getSmallest(Sem)));39 Cs.push_back(ConstantFP::get(Ctx, APFloat::getInf(Sem)));40 Cs.push_back(ConstantFP::get(Ctx, APFloat::getNaN(Sem)));41 } else if (VectorType *VecTy = dyn_cast<VectorType>(T)) {42 std::vector<Constant *> EleCs;43 Type *EltTy = VecTy->getElementType();44 makeConstantsWithType(EltTy, EleCs);45 ElementCount EC = VecTy->getElementCount();46 for (Constant *Elt : EleCs) {47 Cs.push_back(ConstantVector::getSplat(EC, Elt));48 }49 } else {50 if (UseUndef)51 Cs.push_back(UndefValue::get(T));52 Cs.push_back(PoisonValue::get(T));53 }54}55 56std::vector<Constant *> fuzzerop::makeConstantsWithType(Type *T) {57 std::vector<Constant *> Result;58 makeConstantsWithType(T, Result);59 return Result;60}61