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, APInt::getMaxValue(W)));
  19     Cs.push_back(ConstantInt::get(IntTy, APInt::getMinValue(W)));
  20     Cs.push_back(ConstantInt::get(IntTy, APInt::getSignedMaxValue(W)));
  21     Cs.push_back(ConstantInt::get(IntTy, APInt::getSignedMinValue(W)));
  22     Cs.push_back(ConstantInt::get(IntTy, APInt::getOneBitSet(W, W / 2)));
  23   } else if (T->isFloatingPointTy()) {
  24     auto &Ctx = T->getContext();
  25     auto &Sem = T->getFltSemantics();
  26     Cs.push_back(ConstantFP::get(Ctx, APFloat::getZero(Sem)));
  27     Cs.push_back(ConstantFP::get(Ctx, APFloat::getLargest(Sem)));
  28     Cs.push_back(ConstantFP::get(Ctx, APFloat::getSmallest(Sem)));
  29   } else
  30     Cs.push_back(UndefValue::get(T));
  31 }
  32
  33 std::vector<Constant *> fuzzerop::makeConstantsWithType(Type *T) {
  34   std::vector<Constant *> Result;
  35   makeConstantsWithType(T, Result);
  36   return Result;
  37 }