1 files changed, 0 insertions, 140 deletions
diff --git a/llvm/lib/FuzzMutate/RandomIRBuilder.cpp b/llvm/lib/FuzzMutate/RandomIRBuilder.cpp
deleted file mode 100644
index 42e30464b0d..00000000000
--- a/llvm/lib/FuzzMutate/RandomIRBuilder.cpp
+++ /dev/null
@@ -1,140 +0,0 @@
-//===-- RandomIRBuilder.cpp -----------------------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/FuzzMutate/RandomIRBuilder.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/FuzzMutate/Random.h"
-#include "llvm/IR/BasicBlock.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/Function.h"
-#include "llvm/IR/Instructions.h"
-#include "llvm/IR/IntrinsicInst.h"
-#include "llvm/IR/Module.h"
-
-using namespace llvm;
-using namespace fuzzerop;
-
-Value *RandomIRBuilder::findOrCreateSource(BasicBlock &BB,
-                                           ArrayRef<Instruction *> Insts) {
-  return findOrCreateSource(BB, Insts, {}, anyType());
-}
-
-Value *RandomIRBuilder::findOrCreateSource(BasicBlock &BB,
-                                           ArrayRef<Instruction *> Insts,
-                                           ArrayRef<Value *> Srcs,
-                                           SourcePred Pred) {
-  auto MatchesPred = [&Srcs, &Pred](Instruction *Inst) {
-    return Pred.matches(Srcs, Inst);
-  };
-  auto RS = makeSampler(Rand, make_filter_range(Insts, MatchesPred));
-  // Also consider choosing no source, meaning we want a new one.
-  RS.sample(nullptr, /*Weight=*/1);
-  if (Instruction *Src = RS.getSelection())
-    return Src;
-  return newSource(BB, Insts, Srcs, Pred);
-}
-
-Value *RandomIRBuilder::newSource(BasicBlock &BB, ArrayRef<Instruction *> Insts,
-                                  ArrayRef<Value *> Srcs, SourcePred Pred) {
-  // Generate some constants to choose from.
-  auto RS = makeSampler<Value *>(Rand);
-  RS.sample(Pred.generate(Srcs, KnownTypes));
-  assert(!RS.isEmpty() && "Failed to generate sources");
-
-  // If we can find a pointer to load from, use it half the time.
-  Value *Ptr = findPointer(BB, Insts, Srcs, Pred);
-  if (Ptr)
-    RS.sample(Ptr, RS.totalWeight());
-
-  Value *Result = RS.getSelection();
-  if (Result != Ptr)
-    return Result;
-
-  // If we choose the pointer, we need to create a load.
-  auto IP = BB.getFirstInsertionPt();
-  if (auto *I = dyn_cast<Instruction>(Ptr))
-    IP = ++I->getIterator();
-  return new LoadInst(Ptr, "L", &*IP);
-}
-
-static bool isCompatibleReplacement(const Instruction *I, const Use &Operand,
-                                    const Value *Replacement) {
-  if (Operand->getType() != Replacement->getType())
-    return false;
-  switch (I->getOpcode()) {
-  case Instruction::GetElementPtr:
-  case Instruction::ExtractElement:
-  case Instruction::ExtractValue:
-    // TODO: We could potentially validate these, but for now just leave indices
-    // alone.
-    if (Operand.getOperandNo() > 1)
-      return false;
-    break;
-  case Instruction::InsertValue:
-  case Instruction::InsertElement:
-    if (Operand.getOperandNo() > 2)
-      return false;
-    break;
-  default:
-    break;
-  }
-  return true;
-}
-
-void RandomIRBuilder::connectToSink(BasicBlock &BB,
-                                    ArrayRef<Instruction *> Insts, Value *V) {
-  auto RS = makeSampler<Use *>(Rand);
-  for (auto &I : Insts) {
-    if (isa<IntrinsicInst>(I))
-      // TODO: Replacing operands of intrinsics would be interesting, but
-      // there's no easy way to verify that a given replacement is valid given
-      // that intrinsics can impose arbitrary constraints.
-      continue;
-    for (Use &U : I->operands())
-      if (isCompatibleReplacement(I, U, V))
-        RS.sample(&U, 1);
-  }
-  // Also consider choosing no sink, meaning we want a new one.
-  RS.sample(nullptr, /*Weight=*/1);
-
-  if (Use *Sink = RS.getSelection()) {
-    User *U = Sink->getUser();
-    unsigned OpNo = Sink->getOperandNo();
-    U->setOperand(OpNo, V);
-    return;
-  }
-  newSink(BB, Insts, V);
-}
-
-void RandomIRBuilder::newSink(BasicBlock &BB, ArrayRef<Instruction *> Insts,
-                              Value *V) {
-  Value *Ptr = findPointer(BB, Insts, {V}, matchFirstType());
-  if (!Ptr) {
-    if (uniform(Rand, 0, 1))
-      Ptr = new AllocaInst(V->getType(), 0, "A", &*BB.getFirstInsertionPt());
-    else
-      Ptr = UndefValue::get(PointerType::get(V->getType(), 0));
-  }
-
-  new StoreInst(V, Ptr, Insts.back());
-}
-
-Value *RandomIRBuilder::findPointer(BasicBlock &BB,
-                                    ArrayRef<Instruction *> Insts,
-                                    ArrayRef<Value *> Srcs, SourcePred Pred) {
-  auto IsMatchingPtr = [&Srcs, &Pred](Instruction *Inst) {
-    if (auto PtrTy = dyn_cast<PointerType>(Inst->getType()))
-      // TODO: Check if this is horribly expensive.
-      return Pred.matches(Srcs, UndefValue::get(PtrTy->getElementType()));
-    return false;
-  };
-  if (auto RS = makeSampler(Rand, make_filter_range(Insts, IsMatchingPtr)))
-    return RS.getSelection();
-  return nullptr;
-}