lib/FuzzMutate/OpDescriptor.cpp

   1 //===-- OpDescriptor.cpp --------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/FuzzMutate/OpDescriptor.h"
  11 #include "llvm/IR/Constants.h"
  12
  13 using namespace llvm;
  14 using namespace fuzzerop;
  15
  16 void fuzzerop::makeConstantsWithType(Type *T, std::vector<Constant *> &Cs) {
  17   if (auto *IntTy = dyn_cast<IntegerType>(T)) {
  18     uint64_t W = IntTy->getBitWidth();
  19     Cs.push_back(ConstantInt::get(IntTy, APInt::getMaxValue(W)));
  20     Cs.push_back(ConstantInt::get(IntTy, APInt::getMinValue(W)));
  21     Cs.push_back(ConstantInt::get(IntTy, APInt::getSignedMaxValue(W)));
  22     Cs.push_back(ConstantInt::get(IntTy, APInt::getSignedMinValue(W)));
  23     Cs.push_back(ConstantInt::get(IntTy, APInt::getOneBitSet(W, W / 2)));
  24   } else if (T->isFloatingPointTy()) {
  25     auto &Ctx = T->getContext();
  26     auto &Sem = T->getFltSemantics();
  27     Cs.push_back(ConstantFP::get(Ctx, APFloat::getZero(Sem)));
  28     Cs.push_back(ConstantFP::get(Ctx, APFloat::getLargest(Sem)));
  29     Cs.push_back(ConstantFP::get(Ctx, APFloat::getSmallest(Sem)));
  30   } else
  31     Cs.push_back(UndefValue::get(T));
  32 }
  33
  34 std::vector<Constant *> fuzzerop::makeConstantsWithType(Type *T) {
  35   std::vector<Constant *> Result;
  36   makeConstantsWithType(T, Result);
  37   return Result;
  38 }