[llvm-exegesis][NFC] Move random functions from CodeTemplate to SnippetGenerator.

Summary: Just moving methods around.

Reviewers: courbet

Subscribers: tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D52720

llvm-svn: 343461

1 files changed, 0 insertions, 90 deletions

diff --git a/llvm/tools/llvm-exegesis/lib/CodeTemplate.cpp b/llvm/tools/llvm-exegesis/lib/CodeTemplate.cpp
index 677bddd10b8..389cc0dc0f2 100644
--- a/llvm/tools/llvm-exegesis/lib/CodeTemplate.cpp
+++ b/llvm/tools/llvm-exegesis/lib/CodeTemplate.cpp
@@ -52,11 +52,6 @@ InstructionTemplate::getValueFor(const Operand &Op) const {
   return getValueFor(Instr.Variables[Op.VariableIndex]);
 }
 
-// forward declaration.
-static void randomize(const Instruction &Instr, const Variable &Var,
-                      llvm::MCOperand &AssignedValue,
-                      const llvm::BitVector &ForbiddenRegs);
-
 bool InstructionTemplate::hasImmediateVariables() const {
   return llvm::any_of(Instr.Variables, [this](const Variable &Var) {
     assert(!Var.TiedOperands.empty());
@@ -76,89 +71,4 @@ llvm::MCInst InstructionTemplate::build() const {
   return Result;
 }
 
-std::mt19937 &randomGenerator() {
-  static std::random_device RandomDevice;
-  static std::mt19937 RandomGenerator(RandomDevice());
-  return RandomGenerator;
-}
-
-static size_t randomIndex(size_t Size) {
-  assert(Size > 0);
-  std::uniform_int_distribution<> Distribution(0, Size - 1);
-  return Distribution(randomGenerator());
-}
-
-template <typename C>
-static auto randomElement(const C &Container) -> decltype(Container[0]) {
-  return Container[randomIndex(Container.size())];
-}
-
-static void randomize(const Instruction &Instr, const Variable &Var,
-                      llvm::MCOperand &AssignedValue,
-                      const llvm::BitVector &ForbiddenRegs) {
-  assert(!Var.TiedOperands.empty());
-  const Operand &Op = Instr.Operands[Var.TiedOperands.front()];
-  assert(Op.Info != nullptr);
-  const auto &OpInfo = *Op.Info;
-  switch (OpInfo.OperandType) {
-  case llvm::MCOI::OperandType::OPERAND_IMMEDIATE:
-    // FIXME: explore immediate values too.
-    AssignedValue = llvm::MCOperand::createImm(1);
-    break;
-  case llvm::MCOI::OperandType::OPERAND_REGISTER: {
-    assert(Op.Tracker);
-    auto AllowedRegs = Op.Tracker->sourceBits();
-    assert(AllowedRegs.size() == ForbiddenRegs.size());
-    for (auto I : ForbiddenRegs.set_bits())
-      AllowedRegs.reset(I);
-    AssignedValue = llvm::MCOperand::createReg(randomBit(AllowedRegs));
-    break;
-  }
-  default:
-    break;
-  }
-}
-
-static void setRegisterOperandValue(const RegisterOperandAssignment &ROV,
-                                    InstructionTemplate &IB) {
-  assert(ROV.Op);
-  if (ROV.Op->IsExplicit) {
-    auto &AssignedValue = IB.getValueFor(*ROV.Op);
-    if (AssignedValue.isValid()) {
-      assert(AssignedValue.isReg() && AssignedValue.getReg() == ROV.Reg);
-      return;
-    }
-    AssignedValue = llvm::MCOperand::createReg(ROV.Reg);
-  } else {
-    assert(ROV.Op->ImplicitReg != nullptr);
-    assert(ROV.Reg == *ROV.Op->ImplicitReg);
-  }
-}
-
-size_t randomBit(const llvm::BitVector &Vector) {
-  assert(Vector.any());
-  auto Itr = Vector.set_bits_begin();
-  for (size_t I = randomIndex(Vector.count()); I != 0; --I)
-    ++Itr;
-  return *Itr;
-}
-
-void setRandomAliasing(const AliasingConfigurations &AliasingConfigurations,
-                       InstructionTemplate &DefIB, InstructionTemplate &UseIB) {
-  assert(!AliasingConfigurations.empty());
-  assert(!AliasingConfigurations.hasImplicitAliasing());
-  const auto &RandomConf = randomElement(AliasingConfigurations.Configurations);
-  setRegisterOperandValue(randomElement(RandomConf.Defs), DefIB);
-  setRegisterOperandValue(randomElement(RandomConf.Uses), UseIB);
-}
-
-void randomizeUnsetVariables(const llvm::BitVector &ForbiddenRegs,
-                             InstructionTemplate &IT) {
-  for (const Variable &Var : IT.Instr.Variables) {
-    llvm::MCOperand &AssignedValue = IT.getValueFor(Var);
-    if (!AssignedValue.isValid())
-      randomize(IT.Instr, Var, AssignedValue, ForbiddenRegs);
-  }
-}
-
 } // namespace exegesis