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0f87ccdc99
Same as r311392 with some fixes for library dependencies. Thanks to Chapuni for helping work those out! Original commit message: This introduces the FuzzMutate library, which provides structured fuzzing for LLVM IR, as described in my EuroLLVM 2017 talk. Most of the basic mutators to inject and delete IR are provided, with support for most basic operations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311402 91177308-0d34-0410-b5e6-96231b3b80d8
39 lines
1.5 KiB
C++
39 lines
1.5 KiB
C++
//===-- OpDescriptor.cpp --------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/FuzzMutate/OpDescriptor.h"
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#include "llvm/IR/Constants.h"
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using namespace llvm;
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using namespace fuzzerop;
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void fuzzerop::makeConstantsWithType(Type *T, std::vector<Constant *> &Cs) {
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if (auto *IntTy = dyn_cast<IntegerType>(T)) {
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uint64_t W = IntTy->getBitWidth();
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Cs.push_back(ConstantInt::get(IntTy, APInt::getMaxValue(W)));
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Cs.push_back(ConstantInt::get(IntTy, APInt::getMinValue(W)));
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Cs.push_back(ConstantInt::get(IntTy, APInt::getSignedMaxValue(W)));
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Cs.push_back(ConstantInt::get(IntTy, APInt::getSignedMinValue(W)));
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Cs.push_back(ConstantInt::get(IntTy, APInt::getOneBitSet(W, W / 2)));
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} else if (T->isFloatingPointTy()) {
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auto &Ctx = T->getContext();
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auto &Sem = T->getFltSemantics();
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Cs.push_back(ConstantFP::get(Ctx, APFloat::getZero(Sem)));
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Cs.push_back(ConstantFP::get(Ctx, APFloat::getLargest(Sem)));
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Cs.push_back(ConstantFP::get(Ctx, APFloat::getSmallest(Sem)));
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} else
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Cs.push_back(UndefValue::get(T));
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}
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std::vector<Constant *> fuzzerop::makeConstantsWithType(Type *T) {
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std::vector<Constant *> Result;
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makeConstantsWithType(T, Result);
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return Result;
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}
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