llvm/lib/FuzzMutate/OpDescriptor.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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/FuzzMutate/OpDescriptor.h"
  10 #include "llvm/IR/Constants.h"
  11
  12 using namespace llvm;
  13 using namespace fuzzerop;
  14
  15 void fuzzerop::makeConstantsWithType(Type *T, std::vector<Constant *> &Cs) {
  16   if (auto *IntTy = dyn_cast<IntegerType>(T)) {
  17     uint64_t W = IntTy->getBitWidth();
  18     Cs.push_back(ConstantInt::get(IntTy, 0));
  19     Cs.push_back(ConstantInt::get(IntTy, 1));
  20     Cs.push_back(ConstantInt::get(IntTy, 42));
  21     Cs.push_back(ConstantInt::get(IntTy, APInt::getMaxValue(W)));
  22     Cs.push_back(ConstantInt::get(IntTy, APInt::getMinValue(W)));
  23     Cs.push_back(ConstantInt::get(IntTy, APInt::getSignedMaxValue(W)));
  24     Cs.push_back(ConstantInt::get(IntTy, APInt::getSignedMinValue(W)));
  25     Cs.push_back(ConstantInt::get(IntTy, APInt::getOneBitSet(W, W / 2)));
  26   } else if (T->isFloatingPointTy()) {
  27     auto &Ctx = T->getContext();
  28     auto &Sem = T->getFltSemantics();
  29     Cs.push_back(ConstantFP::get(Ctx, APFloat::getZero(Sem)));
  30     Cs.push_back(ConstantFP::get(Ctx, APFloat(Sem, 1)));
  31     Cs.push_back(ConstantFP::get(Ctx, APFloat(Sem, 42)));
  32     Cs.push_back(ConstantFP::get(Ctx, APFloat::getLargest(Sem)));
  33     Cs.push_back(ConstantFP::get(Ctx, APFloat::getSmallest(Sem)));
  34     Cs.push_back(ConstantFP::get(Ctx, APFloat::getInf(Sem)));
  35     Cs.push_back(ConstantFP::get(Ctx, APFloat::getNaN(Sem)));
  36   } else if (VectorType *VecTy = dyn_cast<VectorType>(T)) {
  37     std::vector<Constant *> EleCs;
  38     Type *EltTy = VecTy->getElementType();
  39     makeConstantsWithType(EltTy, EleCs);
  40     ElementCount EC = VecTy->getElementCount();
  41     for (Constant *Elt : EleCs) {
  42       Cs.push_back(ConstantVector::getSplat(EC, Elt));
  43     }
  44   } else {
  45     Cs.push_back(UndefValue::get(T));
  46     Cs.push_back(PoisonValue::get(T));
  47   }
  48 }
  49
  50 std::vector<Constant *> fuzzerop::makeConstantsWithType(Type *T) {
  51   std::vector<Constant *> Result;
  52   makeConstantsWithType(T, Result);
  53   return Result;
  54 }