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
12using namespace llvm;
13using namespace fuzzerop;
14
15void 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
50std::vector<Constant *> fuzzerop::makeConstantsWithType(Type *T) {
51  std::vector<Constant *> Result;
52  makeConstantsWithType(T, Result);
53  return Result;
54}
55