C++ (Cpp) CastInst::getType示例

示例#1

文件： InlineCost.cpp 项目： Blei/llvm-dcpu16

bool CallAnalyzer::visitCastInst(CastInst &I) {
  // Propagate constants through ptrtoint.
  if (Constant *COp = dyn_cast<Constant>(I.getOperand(0)))
    if (Constant *C = ConstantExpr::getCast(I.getOpcode(), COp, I.getType())) {
      SimplifiedValues[&I] = C;
      return true;
    }

  // Disable SROA in the face of arbitrary casts we don't whitelist elsewhere.
  disableSROA(I.getOperand(0));

  // No-op casts don't have any cost.
  if (I.isLosslessCast())
    return true;

  // trunc to a native type is free (assuming the target has compare and
  // shift-right of the same width).
  if (TD && isa<TruncInst>(I) &&
      TD->isLegalInteger(TD->getTypeSizeInBits(I.getType())))
    return true;

  // Result of a cmp instruction is often extended (to be used by other
  // cmp instructions, logical or return instructions). These are usually
  // no-ops on most sane targets.
  if (isa<CmpInst>(I.getOperand(0)))
    return true;

  // Assume the rest of the casts require work.
  return false;
}

示例#2

文件： LoopUnrollAnalyzer.cpp 项目： chunseoklee/llvm

/// Try to simplify cast instruction.
bool UnrolledInstAnalyzer::visitCastInst(CastInst &I) {
  // Propagate constants through casts.
  Constant *COp = dyn_cast<Constant>(I.getOperand(0));
  if (!COp)
    COp = SimplifiedValues.lookup(I.getOperand(0));

  // If we know a simplified value for this operand and cast is valid, save the
  // result to SimplifiedValues.
  // The cast can be invalid, because SimplifiedValues contains results of SCEV
  // analysis, which operates on integers (and, e.g., might convert i8* null to
  // i32 0).
  if (COp && CastInst::castIsValid(I.getOpcode(), COp, I.getType())) {
    if (Constant *C =
            ConstantExpr::getCast(I.getOpcode(), COp, I.getType())) {
      SimplifiedValues[&I] = C;
      return true;
    }
  }

  return Base::visitCastInst(I);
}

示例#3

文件： VectorUtils.cpp 项目： MatzeB/llvm

/// If a value has only one user that is a CastInst, return it.
Value *llvm::getUniqueCastUse(Value *Ptr, Loop *Lp, Type *Ty) {
  Value *UniqueCast = nullptr;
  for (User *U : Ptr->users()) {
    CastInst *CI = dyn_cast<CastInst>(U);
    if (CI && CI->getType() == Ty) {
      if (!UniqueCast)
        UniqueCast = CI;
      else
        return nullptr;
    }
  }
  return UniqueCast;
}

示例#4

文件： InlineCost.cpp 项目： C0deZLee/IntFlow

bool CallAnalyzer::visitCastInst(CastInst &I) {
  // Propagate constants through ptrtoint.
  if (Constant *COp = dyn_cast<Constant>(I.getOperand(0)))
    if (Constant *C = ConstantExpr::getCast(I.getOpcode(), COp, I.getType())) {
      SimplifiedValues[&I] = C;
      return true;
    }

  // Disable SROA in the face of arbitrary casts we don't whitelist elsewhere.
  disableSROA(I.getOperand(0));

  return isInstructionFree(&I, TD);
}

示例#5

文件： LoopUnrollAnalyzer.cpp 项目： margnus1/llvm

/// Try to simplify cast instruction.
bool UnrolledInstAnalyzer::visitCastInst(CastInst &I) {
  // Propagate constants through casts.
  Constant *COp = dyn_cast<Constant>(I.getOperand(0));
  if (!COp)
    COp = SimplifiedValues.lookup(I.getOperand(0));
  if (COp)
    if (Constant *C =
            ConstantExpr::getCast(I.getOpcode(), COp, I.getType())) {
      SimplifiedValues[&I] = C;
      return true;
    }

  return Base::visitCastInst(I);
}

示例#6

文件： InlineCost.cpp 项目： A2-Collaboration/root

bool CallAnalyzer::visitCastInst(CastInst &I) {
  // Propagate constants through ptrtoint.
  Constant *COp = dyn_cast<Constant>(I.getOperand(0));
  if (!COp)
    COp = SimplifiedValues.lookup(I.getOperand(0));
  if (COp)
    if (Constant *C = ConstantExpr::getCast(I.getOpcode(), COp, I.getType())) {
      SimplifiedValues[&I] = C;
      return true;
    }

  // Disable SROA in the face of arbitrary casts we don't whitelist elsewhere.
  disableSROA(I.getOperand(0));

  return TargetTransformInfo::TCC_Free == TTI.getUserCost(&I);
}

示例#7

文件： Execution.cpp 项目： chris-wood/llvm-pgopre

void Interpreter::visitCastInst(CastInst &I) {
  ExecutionContext &SF = ECStack.back();
  SetValue(&I, executeCastOperation(I.getOperand(0), I.getType(), SF), SF);
}