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📄 AbstractCallSite.h(9.5 KB)
📄 Argument.h(5.03 KB)
📄 AssemblyAnnotationWriter.h(2.2 KB)
📄 Attributes.h(35.5 KB)
📄 Attributes.td(8.96 KB)
📄 AutoUpgrade.h(3.96 KB)
📄 BasicBlock.h(21.91 KB)
📄 CFG.h(13.84 KB)
📄 CallingConv.h(9.27 KB)
📄 Comdat.h(2.16 KB)
📄 Constant.h(8.33 KB)
📄 ConstantFolder.h(10.01 KB)
📄 ConstantRange.h(21.6 KB)
📄 Constants.h(53.03 KB)
📄 ConstrainedOps.def(5.4 KB)
📄 DIBuilder.h(44.36 KB)
📄 DataLayout.h(24.11 KB)
📄 DebugInfo.h(5.42 KB)
📄 DebugInfoFlags.def(3.62 KB)
📄 DebugInfoMetadata.h(132.91 KB)
📄 DebugLoc.h(4.57 KB)
📄 DerivedTypes.h(26.81 KB)
📄 DerivedUser.h(1.32 KB)
📄 DiagnosticHandler.h(2.89 KB)
📄 DiagnosticInfo.h(41.02 KB)
📄 DiagnosticPrinter.h(3.46 KB)
📄 Dominators.h(9.94 KB)
📄 FPEnv.h(1.97 KB)
📄 FixedMetadataKinds.def(2.05 KB)
📄 Function.h(31.39 KB)
📄 GVMaterializer.h(1.45 KB)
📄 GetElementPtrTypeIterator.h(5.54 KB)
📄 GlobalAlias.h(3.16 KB)
📄 GlobalIFunc.h(2.51 KB)
📄 GlobalIndirectSymbol.h(3.11 KB)
📄 GlobalObject.h(7.39 KB)
📄 GlobalValue.h(21.2 KB)
📄 GlobalVariable.h(9.6 KB)
📄 IRBuilder.h(105.58 KB)
📄 IRBuilderFolder.h(7.1 KB)
📄 IRPrintingPasses.h(3.57 KB)
📄 InlineAsm.h(15.84 KB)
📄 InstIterator.h(5.06 KB)
📄 InstVisitor.h(13.95 KB)
📄 InstrTypes.h(86.25 KB)
📄 Instruction.def(8.53 KB)
📄 Instruction.h(30.74 KB)
📄 Instructions.h(195.68 KB)
📄 IntrinsicInst.h(29.03 KB)
📄 Intrinsics.h(8.21 KB)
📄 Intrinsics.td(78.88 KB)
📄 IntrinsicsAArch64.td(100.59 KB)
📄 IntrinsicsAMDGPU.td(80.43 KB)
📄 IntrinsicsARM.td(65.15 KB)
📄 IntrinsicsBPF.td(1.54 KB)
📄 IntrinsicsHexagon.td(11.53 KB)
📄 IntrinsicsHexagonDep.td(197.38 KB)
📄 IntrinsicsMips.td(94.94 KB)
📄 IntrinsicsNVVM.td(193.97 KB)
📄 IntrinsicsPowerPC.td(68.23 KB)
📄 IntrinsicsRISCV.td(3.24 KB)
📄 IntrinsicsSystemZ.td(18.56 KB)
📄 IntrinsicsWebAssembly.td(9.38 KB)
📄 IntrinsicsX86.td(242.99 KB)
📄 IntrinsicsXCore.td(6.83 KB)
📄 LLVMContext.h(14.18 KB)
📄 LLVMRemarkStreamer.h(3.36 KB)
📄 LegacyPassManager.h(3.11 KB)
📄 LegacyPassManagers.h(18.17 KB)
📄 LegacyPassNameParser.h(3.73 KB)
📄 MDBuilder.h(8.65 KB)
📄 Mangler.h(2.06 KB)
📄 MatrixBuilder.h(8.81 KB)
📄 Metadata.def(5.07 KB)
📄 Metadata.h(45.24 KB)
📄 Module.h(34.6 KB)
📄 ModuleSlotTracker.h(2.56 KB)
📄 ModuleSummaryIndex.h(58.12 KB)
📄 ModuleSummaryIndexYAML.h(10.93 KB)
📄 NoFolder.h(11.32 KB)
📄 OperandTraits.h(5.78 KB)
📄 Operator.h(19.58 KB)
📄 OptBisect.h(2.79 KB)
📄 PassInstrumentation.h(8.05 KB)
📄 PassManager.h(54.18 KB)
📄 PassManagerImpl.h(5.76 KB)
📄 PassManagerInternal.h(11.9 KB)
📄 PassTimingInfo.h(3.65 KB)
📄 PatternMatch.h(73.41 KB)
📄 PredIteratorCache.h(2.59 KB)
📄 ProfileSummary.h(4.34 KB)
📄 RuntimeLibcalls.def(24.52 KB)
📄 SafepointIRVerifier.h(1.63 KB)
📄 Statepoint.h(13.61 KB)
📄 SymbolTableListTraits.h(4.45 KB)
📄 TrackingMDRef.h(4.5 KB)
📄 Type.h(18.98 KB)
📄 TypeFinder.h(2.57 KB)
📄 Use.h(3.75 KB)
📄 UseListOrder.h(1.18 KB)
📄 User.h(11.75 KB)
📄 VPIntrinsics.def(2.34 KB)
📄 Value.def(3.62 KB)
📄 Value.h(32.16 KB)
📄 ValueHandle.h(18.11 KB)
📄 ValueMap.h(14.09 KB)
📄 ValueSymbolTable.h(4.22 KB)
📄 Verifier.h(5.47 KB)

Editing: Constant.h

//===-- llvm/Constant.h - Constant class definition -------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the Constant class.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_IR_CONSTANT_H
#define LLVM_IR_CONSTANT_H

#include "llvm/IR/User.h"
#include "llvm/IR/Value.h"
#include "llvm/Support/Casting.h"

namespace llvm {

class APInt;

/// This is an important base class in LLVM. It provides the common facilities
/// of all constant values in an LLVM program. A constant is a value that is
/// immutable at runtime. Functions are constants because their address is
/// immutable. Same with global variables.
///
/// All constants share the capabilities provided in this class. All constants
/// can have a null value. They can have an operand list. Constants can be
/// simple (integer and floating point values), complex (arrays and structures),
/// or expression based (computations yielding a constant value composed of
/// only certain operators and other constant values).
///
/// Note that Constants are immutable (once created they never change)
/// and are fully shared by structural equivalence.  This means that two
/// structurally equivalent constants will always have the same address.
/// Constants are created on demand as needed and never deleted: thus clients
/// don't have to worry about the lifetime of the objects.
/// LLVM Constant Representation
class Constant : public User {
protected:
  Constant(Type *ty, ValueTy vty, Use *Ops, unsigned NumOps)
    : User(ty, vty, Ops, NumOps) {}

~Constant() = default;

public:
  void operator=(const Constant &) = delete;
  Constant(const Constant &) = delete;

/// Return true if this is the value that would be returned by getNullValue.
  bool isNullValue() const;

/// Returns true if the value is one.
  bool isOneValue() const;

/// Return true if the value is not the one value, or,
  /// for vectors, does not contain one value elements.
  bool isNotOneValue() const;

/// Return true if this is the value that would be returned by
  /// getAllOnesValue.
  bool isAllOnesValue() const;

/// Return true if the value is what would be returned by
  /// getZeroValueForNegation.
  bool isNegativeZeroValue() const;

/// Return true if the value is negative zero or null value.
  bool isZeroValue() const;

/// Return true if the value is not the smallest signed value, or,
  /// for vectors, does not contain smallest signed value elements.
  bool isNotMinSignedValue() const;

/// Return true if the value is the smallest signed value.
  bool isMinSignedValue() const;

/// Return true if this is a finite and non-zero floating-point scalar
  /// constant or a vector constant with all finite and non-zero elements.
  bool isFiniteNonZeroFP() const;

/// Return true if this is a normal (as opposed to denormal) floating-point
  /// scalar constant or a vector constant with all normal elements.
  bool isNormalFP() const;

/// Return true if this scalar has an exact multiplicative inverse or this
  /// vector has an exact multiplicative inverse for each element in the vector.
  bool hasExactInverseFP() const;

/// Return true if this is a floating-point NaN constant or a vector
  /// floating-point constant with all NaN elements.
  bool isNaN() const;

/// Return true if this constant and a constant 'Y' are element-wise equal.
  /// This is identical to just comparing the pointers, with the exception that
  /// for vectors, if only one of the constants has an `undef` element in some
  /// lane, the constants still match.
  bool isElementWiseEqual(Value *Y) const;

/// Return true if this is a vector constant that includes any undefined
  /// elements.
  bool containsUndefElement() const;

/// Return true if this is a vector constant that includes any constant
  /// expressions.
  bool containsConstantExpression() const;

/// Return true if evaluation of this constant could trap. This is true for
  /// things like constant expressions that could divide by zero.
  bool canTrap() const;

/// Return true if the value can vary between threads.
  bool isThreadDependent() const;

/// Return true if the value is dependent on a dllimport variable.
  bool isDLLImportDependent() const;

/// Return true if the constant has users other than constant expressions and
  /// other dangling things.
  bool isConstantUsed() const;

/// This method classifies the entry according to whether or not it may
  /// generate a relocation entry.  This must be conservative, so if it might
  /// codegen to a relocatable entry, it should say so.
  ///
  /// FIXME: This really should not be in IR.
  bool needsRelocation() const;

/// For aggregates (struct/array/vector) return the constant that corresponds
  /// to the specified element if possible, or null if not. This can return null
  /// if the element index is a ConstantExpr, if 'this' is a constant expr or
  /// if the constant does not fit into an uint64_t.
  Constant *getAggregateElement(unsigned Elt) const;
  Constant *getAggregateElement(Constant *Elt) const;

/// If all elements of the vector constant have the same value, return that
  /// value. Otherwise, return nullptr. Ignore undefined elements by setting
  /// AllowUndefs to true.
  Constant *getSplatValue(bool AllowUndefs = false) const;

/// If C is a constant integer then return its value, otherwise C must be a
  /// vector of constant integers, all equal, and the common value is returned.
  const APInt &getUniqueInteger() const;

/// Called if some element of this constant is no longer valid.
  /// At this point only other constants may be on the use_list for this
  /// constant.  Any constants on our Use list must also be destroy'd.  The
  /// implementation must be sure to remove the constant from the list of
  /// available cached constants.  Implementations should implement
  /// destroyConstantImpl to remove constants from any pools/maps they are
  /// contained it.
  void destroyConstant();

//// Methods for support type inquiry through isa, cast, and dyn_cast:
  static bool classof(const Value *V) {
    static_assert(ConstantFirstVal == 0, "V->getValueID() >= ConstantFirstVal always succeeds");
    return V->getValueID() <= ConstantLastVal;
  }

/// This method is a special form of User::replaceUsesOfWith
  /// (which does not work on constants) that does work
  /// on constants.  Basically this method goes through the trouble of building
  /// a new constant that is equivalent to the current one, with all uses of
  /// From replaced with uses of To.  After this construction is completed, all
  /// of the users of 'this' are replaced to use the new constant, and then
  /// 'this' is deleted.  In general, you should not call this method, instead,
  /// use Value::replaceAllUsesWith, which automatically dispatches to this
  /// method as needed.
  ///
  void handleOperandChange(Value *, Value *);

static Constant *getNullValue(Type* Ty);

/// @returns the value for an integer or vector of integer constant of the
  /// given type that has all its bits set to true.
  /// Get the all ones value
  static Constant *getAllOnesValue(Type* Ty);

/// Return the value for an integer or pointer constant, or a vector thereof,
  /// with the given scalar value.
  static Constant *getIntegerValue(Type *Ty, const APInt &V);

/// If there are any dead constant users dangling off of this constant, remove
  /// them. This method is useful for clients that want to check to see if a
  /// global is unused, but don't want to deal with potentially dead constants
  /// hanging off of the globals.
  void removeDeadConstantUsers() const;

const Constant *stripPointerCasts() const {
    return cast<Constant>(Value::stripPointerCasts());
  }

Constant *stripPointerCasts() {
    return const_cast<Constant*>(
                      static_cast<const Constant *>(this)->stripPointerCasts());
  }

/// Try to replace undefined constant C or undefined elements in C with
  /// Replacement. If no changes are made, the constant C is returned.
  static Constant *replaceUndefsWith(Constant *C, Constant *Replacement);
};

} // end namespace llvm

#endif // LLVM_IR_CONSTANT_H

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Editing: Constant.h

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