[llvm] Remove unused forward declarations (NFC)

llvm/include/llvm/Analysis/BasicAliasAnalysis.h

@@ -25,7 +25,6 @@
 
 namespace llvm {
 
-struct AAMDNodes;
 class AssumptionCache;
 class BasicBlock;
 class DataLayout;

llvm/include/llvm/Analysis/MemoryBuiltins.h

@@ -44,7 +44,6 @@ class IntToPtrInst;
 class LLVMContext;
 class LoadInst;
 class PHINode;
-class PointerType;
 class SelectInst;
 class Type;
 class UndefValue;

llvm/include/llvm/CodeGen/MIRFormatter.h

@@ -23,7 +23,6 @@ namespace llvm {
 class MachineFunction;
 class MachineInstr;
 struct PerFunctionMIParsingState;
-struct SlotMapping;
 
 /// MIRFormater - Interface to format MIR operand based on target
 class MIRFormatter {

llvm/include/llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h

@@ -16,7 +16,6 @@
 
 namespace llvm {
 
-class DataExtractor;
 class DWARFUnit;
 
 /// DWARFDebugInfoEntry - A DIE with only the minimum required data.

llvm/include/llvm/DebugInfo/GSYM/LookupResult.h

@@ -17,7 +17,6 @@
 namespace llvm {
 class raw_ostream;
 namespace gsym {
-struct FileEntry;
 
 struct SourceLocation {
   StringRef Name;      ///< Function or symbol name.

llvm/include/llvm/DebugInfo/GSYM/ObjectFileTransformer.h

@@ -21,7 +21,6 @@ class ObjectFile;
 
 namespace gsym {
 
-struct CUInfo;
 class GsymCreator;
 
 class ObjectFileTransformer {

llvm/include/llvm/DebugInfo/MSF/MSFBuilder.h

@@ -20,7 +20,6 @@
 
 namespace llvm {
 class FileBufferByteStream;
-class WritableBinaryStream;
 namespace msf {
 
 class MSFBuilder {

llvm/include/llvm/Demangle/MicrosoftDemangleNodes.h

@@ -283,9 +283,7 @@ struct StructorIdentifierNode;
 struct ThunkSignatureNode;
 struct PointerTypeNode;
 struct ArrayTypeNode;
-struct CustomNode;
 struct TagTypeNode;
-struct IntrinsicTypeNode;
 struct NodeArrayNode;
 struct QualifiedNameNode;
 struct TemplateParameterReferenceNode;

llvm/include/llvm/ExecutionEngine/JITEventListener.h

@@ -24,7 +24,6 @@
 namespace llvm {
 
 class IntelJITEventsWrapper;
-class MachineFunction;
 class OProfileWrapper;
 
 namespace object {

llvm/include/llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h

@@ -51,13 +51,8 @@
 #include <vector>
 
 namespace llvm {
-
-class Value;
-
 namespace orc {
 
-class ExtractingIRMaterializationUnit;
-
 class CompileOnDemandLayer : public IRLayer {
   friend class PartitioningIRMaterializationUnit;
 

llvm/include/llvm/ExecutionEngine/Orc/CompileUtils.h

@@ -20,7 +20,6 @@
 
 namespace llvm {
 
-class MCContext;
 class MemoryBuffer;
 class Module;
 class ObjectCache;

llvm/include/llvm/ExecutionEngine/Orc/ExecutionUtils.h

@@ -33,7 +33,6 @@ class ConstantArray;
 class GlobalVariable;
 class Function;
 class Module;
-class TargetMachine;
 class Value;
 
 namespace orc {

llvm/include/llvm/ExecutionEngine/Orc/IRTransformLayer.h

@@ -19,7 +19,6 @@
 #include <memory>
 
 namespace llvm {
-class Module;
 namespace orc {
 
 /// A layer that applies a transform to emitted modules.

llvm/include/llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h

@@ -38,10 +38,6 @@ class LinkGraph;
 class Symbol;
 } // namespace jitlink
 
-namespace object {
-class ObjectFile;
-} // namespace object
-
 namespace orc {
 
 class ObjectLinkingLayerJITLinkContext;

llvm/include/llvm/Frontend/OpenMP/OMPConstants.h

@@ -20,13 +20,6 @@
 #include "llvm/Frontend/OpenMP/OMP.h.inc"
 
 namespace llvm {
-class Type;
-class Module;
-class ArrayType;
-class StructType;
-class PointerType;
-class FunctionType;
-
 namespace omp {
 LLVM_ENABLE_BITMASK_ENUMS_IN_NAMESPACE();
 

llvm/include/llvm/IR/GlobalObject.h

@@ -22,7 +22,6 @@
 namespace llvm {
 
 class Comdat;
-class MDNode;
 class Metadata;
 
 class GlobalObject : public GlobalValue {

llvm/include/llvm/IR/GlobalVariable.h

@@ -34,7 +34,6 @@ class Constant;
 class Module;
 
 template <typename ValueSubClass> class SymbolTableListTraits;
-class DIGlobalVariable;
 class DIGlobalVariableExpression;
 
 class GlobalVariable : public GlobalObject, public ilist_node<GlobalVariable> {

llvm/include/llvm/IR/LLVMContext.h

@@ -32,7 +32,6 @@ class Module;
 class OptPassGate;
 template <typename T> class SmallVectorImpl;
 template <typename T> class StringMapEntry;
-class SMDiagnostic;
 class StringRef;
 class Twine;
 class LLVMRemarkStreamer;

llvm/include/llvm/IR/LegacyPassManagers.h

@@ -90,7 +90,6 @@ template <typename T> class ArrayRef;
 class Module;
 class StringRef;
 class Value;
-class Timer;
 class PMDataManager;
 
 // enums for debugging strings

llvm/include/llvm/IR/Module.h

@@ -47,9 +47,7 @@ class GVMaterializer;
 class LLVMContext;
 class MemoryBuffer;
 class ModuleSummaryIndex;
-class Pass;
 class RandomNumberGenerator;
-template <class PtrType> class SmallPtrSetImpl;
 class StructType;
 class VersionTuple;
 

llvm/include/llvm/IR/PseudoProbe.h

@@ -21,7 +21,6 @@
 namespace llvm {
 
 class Instruction;
-class BasicBlock;
 
 constexpr const char *PseudoProbeDescMetadataName = "llvm.pseudo_probe_desc";
 

llvm/include/llvm/IR/SSAContext.h

@@ -26,7 +26,6 @@ class BasicBlock;
 class Function;
 class Instruction;
 class Value;
-template <typename> class SmallVectorImpl;
 template <typename, bool> class DominatorTreeBase;
 
 template <> class GenericSSAContext<Function> {

llvm/include/llvm/LTO/LTO.h

@@ -35,7 +35,6 @@ class LLVMContext;
 class MemoryBufferRef;
 class Module;
 class raw_pwrite_stream;
-class Target;
 class ToolOutputFile;
 
 /// Resolve linkage for prevailing symbols in the \p Index. Linkage changes

llvm/include/llvm/LTO/legacy/ThinLTOCodeGenerator.h

@@ -29,7 +29,6 @@
 
 namespace llvm {
 class StringRef;
-class LLVMContext;
 class TargetMachine;
 
 /// Helper to gather options relevant to the target machine creation

llvm/include/llvm/Linker/Linker.h

@@ -14,8 +14,6 @@
 
 namespace llvm {
 class Module;
-class StructType;
-class Type;
 
 /// This class provides the core functionality of linking in LLVM. It keeps a
 /// pointer to the merged module so far. It doesn't take ownership of the

llvm/include/llvm/MC/MCPseudoProbe.h

@@ -60,7 +60,6 @@
 namespace llvm {
 
 class MCSection;
-class MCStreamer;
 class MCSymbol;
 class MCObjectStreamer;
 class raw_ostream;

llvm/include/llvm/MC/MCStreamer.h

@@ -40,7 +40,6 @@ namespace llvm {
 
 class AssemblerConstantPools;
 class MCAsmBackend;
-class MCCodeEmitter;
 class MCContext;
 struct MCDwarfFrameInfo;
 class MCExpr;

llvm/include/llvm/Object/Error.h

@@ -22,8 +22,6 @@ class Twine;
 
 namespace object {
 
-class Binary;
-
 const std::error_category &object_category();
 
 enum class object_error {

llvm/include/llvm/Object/IRObjectFile.h

@@ -20,10 +20,7 @@
 
 namespace llvm {
 class BitcodeModule;
-class Mangler;
 class Module;
-class GlobalValue;
-class Triple;
 
 namespace object {
 class ObjectFile;

llvm/include/llvm/Object/MachOUniversal.h

@@ -22,7 +22,6 @@
 
 namespace llvm {
 class StringRef;
-class Module;
 class LLVMContext;
 
 namespace object {

llvm/include/llvm/Object/ObjectFile.h

@@ -31,7 +31,6 @@
 
 namespace llvm {
 
-class ARMAttributeParser;
 class SubtargetFeatures;
 
 namespace object {

llvm/include/llvm/ObjectYAML/DWARFEmitter.h

@@ -26,7 +26,6 @@ class raw_ostream;
 namespace DWARFYAML {
 
 struct Data;
-struct PubSection;
 
 Error emitDebugAbbrev(raw_ostream &OS, const Data &DI);
 Error emitDebugStr(raw_ostream &OS, const Data &DI);

llvm/include/llvm/Support/ARMAttributeParser.h

@@ -18,7 +18,6 @@
 #include "llvm/Support/Error.h"
 
 namespace llvm {
-class StringRef;
 
 class ARMAttributeParser : public ELFAttributeParser {
   struct DisplayHandler {

llvm/include/llvm/Support/CodeGenCoverage.h

@@ -14,7 +14,6 @@
 #include "llvm/ADT/BitVector.h"
 
 namespace llvm {
-class LLVMContext;
 class MemoryBuffer;
 
 class CodeGenCoverage {

llvm/include/llvm/Support/LowLevelTypeImpl.h

@@ -33,7 +33,6 @@
 
 namespace llvm {
 
-class DataLayout;
 class Type;
 class raw_ostream;
 

llvm/include/llvm/TableGen/Record.h

@@ -44,7 +44,6 @@ struct RecordContext;
 } // namespace detail
 
 class ListRecTy;
-struct MultiClass;
 class Record;
 class RecordKeeper;
 class RecordVal;

llvm/include/llvm/Target/CGPassBuilderOption.h

@@ -19,7 +19,6 @@
 #include "llvm/Target/TargetOptions.h"
 
 namespace llvm {
-class TargetMachine;
 
 enum class RunOutliner { TargetDefault, AlwaysOutline, NeverOutline };
 enum class RegAllocType { Default, Basic, Fast, Greedy, PBQP };

llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h

@@ -25,9 +25,7 @@ namespace llvm {
 
 class ConstantFP;
 class ConstantInt;
-class DbgVariable;
 class DwarfCompileUnit;
-class MachineOperand;
 class MCDwarfDwoLineTable;
 class MCSymbol;
 

llvm/lib/CodeGen/AsmPrinter/PseudoProbePrinter.h

@@ -19,8 +19,6 @@
 namespace llvm {
 
 class AsmPrinter;
-class MCStreamer;
-class Module;
 class DILocation;
 
 class PseudoProbeHandler : public AsmPrinterHandler {

llvm/lib/CodeGen/BranchFolding.h

@@ -23,7 +23,6 @@ class BasicBlock;
 class MachineBranchProbabilityInfo;
 class MachineFunction;
 class MachineLoopInfo;
-class MachineModuleInfo;
 class MachineRegisterInfo;
 class MBFIWrapper;
 class ProfileSummaryInfo;

llvm/lib/ExecutionEngine/JITLink/JITLinkGeneric.h

@@ -19,9 +19,6 @@
 #define DEBUG_TYPE "jitlink"
 
 namespace llvm {
-
-class MemoryBufferRef;
-
 namespace jitlink {
 
 /// Base class for a JIT linker.

llvm/lib/Target/ARM/ARM.h

@@ -25,7 +25,6 @@ class ARMAsmPrinter;
 class ARMBaseTargetMachine;
 class ARMRegisterBankInfo;
 class ARMSubtarget;
-struct BasicBlockInfo;
 class Function;
 class FunctionPass;
 class InstructionSelector;

llvm/lib/Target/X86/X86AsmPrinter.h

@@ -23,7 +23,6 @@ class MCCodeEmitter;
 class MCStreamer;
 class X86Subtarget;
 class TargetMachine;
-struct ASanAccessInfo;
 
 class LLVM_LIBRARY_VISIBILITY X86AsmPrinter : public AsmPrinter {
   const X86Subtarget *Subtarget = nullptr;

llvm/lib/Transforms/ObjCARC/ProvenanceAnalysis.h

@@ -32,7 +32,6 @@
 namespace llvm {
 
 class AAResults;
-class DataLayout;
 class PHINode;
 class SelectInst;
 class Value;

llvm/lib/Transforms/Scalar/IndVarSimplify.cpp

@@ -138,8 +138,6 @@ AllowIVWidening("indvars-widen-indvars", cl::Hidden, cl::init(true),
 
 namespace {
 
-struct RewritePhi;
-
 class IndVarSimplify {
   LoopInfo *LI;
   ScalarEvolution *SE;

llvm/lib/Transforms/Vectorize/VPlanValue.h

@@ -405,7 +405,6 @@ public:
 
 class VPlan;
 class VPBasicBlock;
-class VPRegionBlock;
 
 /// This class can be used to assign consecutive numbers to all VPValues in a
 /// VPlan and allows querying the numbering for printing, similar to the

llvm/tools/bugpoint/BugDriver.h

@@ -25,7 +25,6 @@
 
 namespace llvm {
 
-class Value;
 class PassInfo;
 class Module;
 class GlobalVariable;
@@ -35,8 +34,6 @@ class AbstractInterpreter;
 class Instruction;
 class LLVMContext;
 
-class DebugCrashes;
-
 class CC;
 
 extern bool DisableSimplifyCFG;

llvm/tools/llvm-objdump/COFFDump.h

@@ -18,7 +18,6 @@ class Error;
 namespace object {
 class COFFObjectFile;
 class COFFImportFile;
-class ObjectFile;
 class RelocationRef;
 } // namespace object
 

llvm/tools/llvm-objdump/llvm-objdump.h

@@ -21,10 +21,6 @@ class StringRef;
 class Twine;
 
 namespace object {
-class ELFObjectFileBase;
-class ELFSectionRef;
-class MachOObjectFile;
-class MachOUniversalBinary;
 class RelocationRef;
 struct VersionEntry;
 } // namespace object

llvm/tools/llvm-pdbutil/DumpOutputStyle.h

@@ -21,12 +21,6 @@
 #include <string>
 
 namespace llvm {
-class BitVector;
-
-namespace codeview {
-class LazyRandomTypeCollection;
-}
-
 namespace object {
 class COFFObjectFile;
 }

llvm/tools/llvm-pdbutil/InputFile.h

@@ -26,7 +26,6 @@ class LazyRandomTypeCollection;
 }
 namespace object {
 class COFFObjectFile;
-class SectionRef;
 } // namespace object
 
 namespace pdb {

llvm/tools/llvm-pdbutil/LinePrinter.h

@@ -20,7 +20,6 @@
 #include <list>
 
 namespace llvm {
-class BinaryStreamReader;
 namespace msf {
 class MSFStreamLayout;
 } // namespace msf

llvm/tools/llvm-pdbutil/OutputStyle.h

@@ -13,7 +13,6 @@
 
 namespace llvm {
 namespace pdb {
-class PDBFile;
 
 class OutputStyle {
 public:

llvm/tools/llvm-pdbutil/PdbYaml.h

@@ -27,13 +27,9 @@
 #include <vector>
 
 namespace llvm {
-namespace codeview {
-class DebugStringTableSubsection;
-}
 namespace pdb {
 
 namespace yaml {
-struct SerializationContext;
 
 struct MSFHeaders {
   msf::SuperBlock SuperBlock;

llvm/tools/llvm-pdbutil/YAMLOutputStyle.h

@@ -17,7 +17,6 @@
 
 namespace llvm {
 namespace pdb {
-class ModuleDebugStreamRef;
 
 class YAMLOutputStyle : public OutputStyle {
 public:

llvm/tools/llvm-rc/ResourceScriptParser.h

@@ -24,9 +24,6 @@
 #include <vector>
 
 namespace llvm {
-namespace opt {
-class InputArgList;
-}
 namespace rc {
 
 class RCParser {

llvm/utils/TableGen/CodeGenIntrinsics.h

@@ -21,7 +21,6 @@
 namespace llvm {
 class Record;
 class RecordKeeper;
-class CodeGenTarget;
 
 struct CodeGenIntrinsic {
   Record *TheDef;             // The actual record defining this intrinsic.

llvm/utils/TableGen/CodeGenSchedule.h

@@ -28,7 +28,6 @@ namespace llvm {
 class CodeGenTarget;
 class CodeGenSchedModels;
 class CodeGenInstruction;
-class CodeGenRegisterClass;
 
 using RecVec = std::vector<Record*>;
 using RecIter = std::vector<Record*>::const_iterator;

llvm/utils/TableGen/GlobalISel/GIMatchDagPredicateDependencyEdge.h

@@ -14,7 +14,6 @@
 namespace llvm {
 class GIMatchDag;
 class GIMatchDagInstr;
-class GIMatchDagEdge;
 class GIMatchDagPredicate;
 
 /// Represents a dependency that must be met to evaluate a predicate.