IR: Split out DebugInfoMetadata.h, NFC

Move debug-info-centred `Metadata` subclasses into their own
header/source file.  A couple of private template functions are needed
from both `Metadata.cpp` and `DebugInfoMetadata.cpp`, so I've moved them
to `lib/IR/MetadataImpl.h`.

llvm-svn: 227835

1 files changed, 2 insertions, 105 deletions

diff --git a/llvm/lib/IR/Metadata.cpp b/llvm/lib/IR/Metadata.cpp
index c06d36e1507..6227c209352 100644
--- a/llvm/lib/IR/Metadata.cpp
+++ b/llvm/lib/IR/Metadata.cpp
@@ -13,6 +13,7 @@
 
 #include "llvm/IR/Metadata.h"
 #include "LLVMContextImpl.h"
+#include "MetadataImpl.h"
 #include "SymbolTableListTraitsImpl.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/STLExtras.h"
@@ -20,6 +21,7 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/IR/ConstantRange.h"
+#include "llvm/IR/DebugInfoMetadata.h"
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
@@ -541,10 +543,6 @@ void MDTuple::recalculateHash() {
   setHash(MDTupleInfo::KeyTy::calculateHash(this));
 }
 
-void GenericDebugNode::recalculateHash() {
-  setHash(GenericDebugNodeInfo::KeyTy::calculateHash(this));
-}
-
 void MDNode::dropAllReferences() {
   for (unsigned I = 0, E = NumOperands; I != E; ++I)
     setOperand(I, nullptr);
@@ -616,13 +614,6 @@ void MDNode::deleteAsSubclass() {
 }
 
 template <class T, class InfoT>
-static T *getUniqued(DenseSet<T *, InfoT> &Store,
-                     const typename InfoT::KeyTy &Key) {
-  auto I = Store.find_as(Key);
-  return I == Store.end() ? nullptr : *I;
-}
-
-template <class T, class InfoT>
 static T *uniquifyImpl(T *N, DenseSet<T *, InfoT> &Store) {
   if (T *U = getUniqued(Store, N))
     return U;
@@ -672,21 +663,6 @@ void MDNode::eraseFromStore() {
   }
 }
 
-template <class T, class StoreT>
-T *MDNode::storeImpl(T *N, StorageType Storage, StoreT &Store) {
-  switch (Storage) {
-  case Uniqued:
-    Store.insert(N);
-    break;
-  case Distinct:
-    N->storeDistinctInContext();
-    break;
-  case Temporary:
-    break;
-  }
-  return N;
-}
-
 MDTuple *MDTuple::getImpl(LLVMContext &Context, ArrayRef<Metadata *> MDs,
                           StorageType Storage, bool ShouldCreate) {
   unsigned Hash = 0;
@@ -705,85 +681,6 @@ MDTuple *MDTuple::getImpl(LLVMContext &Context, ArrayRef<Metadata *> MDs,
                    Storage, Context.pImpl->MDTuples);
 }
 
-MDLocation::MDLocation(LLVMContext &C, StorageType Storage, unsigned Line,
-                       unsigned Column, ArrayRef<Metadata *> MDs)
-    : MDNode(C, MDLocationKind, Storage, MDs) {
-  assert((MDs.size() == 1 || MDs.size() == 2) &&
-         "Expected a scope and optional inlined-at");
-
-  // Set line and column.
-  assert(Line < (1u << 24) && "Expected 24-bit line");
-  assert(Column < (1u << 16) && "Expected 16-bit column");
-
-  SubclassData32 = Line;
-  SubclassData16 = Column;
-}
-
-static void adjustLine(unsigned &Line) {
-  // Set to unknown on overflow.  Still use 24 bits for now.
-  if (Line >= (1u << 24))
-    Line = 0;
-}
-
-static void adjustColumn(unsigned &Column) {
-  // Set to unknown on overflow.  We only have 16 bits to play with here.
-  if (Column >= (1u << 16))
-    Column = 0;
-}
-
-MDLocation *MDLocation::getImpl(LLVMContext &Context, unsigned Line,
-                                unsigned Column, Metadata *Scope,
-                                Metadata *InlinedAt, StorageType Storage,
-                                bool ShouldCreate) {
-  // Fixup line/column.
-  adjustLine(Line);
-  adjustColumn(Column);
-
-  if (Storage == Uniqued) {
-    if (auto *N = getUniqued(
-            Context.pImpl->MDLocations,
-            MDLocationInfo::KeyTy(Line, Column, Scope, InlinedAt)))
-      return N;
-    if (!ShouldCreate)
-      return nullptr;
-  } else {
-    assert(ShouldCreate && "Expected non-uniqued nodes to always be created");
-  }
-
-  SmallVector<Metadata *, 2> Ops;
-  Ops.push_back(Scope);
-  if (InlinedAt)
-    Ops.push_back(InlinedAt);
-  return storeImpl(new (Ops.size())
-                       MDLocation(Context, Storage, Line, Column, Ops),
-                   Storage, Context.pImpl->MDLocations);
-}
-
-GenericDebugNode *GenericDebugNode::getImpl(LLVMContext &Context, unsigned Tag,
-                                            StringRef Header,
-                                            ArrayRef<Metadata *> DwarfOps,
-                                            StorageType Storage,
-                                            bool ShouldCreate) {
-  unsigned Hash = 0;
-  if (Storage == Uniqued) {
-    GenericDebugNodeInfo::KeyTy Key(Tag, Header, DwarfOps);
-    if (auto *N = getUniqued(Context.pImpl->GenericDebugNodes, Key))
-      return N;
-    if (!ShouldCreate)
-      return nullptr;
-    Hash = Key.getHash();
-  } else {
-    assert(ShouldCreate && "Expected non-uniqued nodes to always be created");
-  }
-
-  // Use a nullptr for empty headers.
-  Metadata *PreOps[] = {Header.empty() ? nullptr
-                                       : MDString::get(Context, Header)};
-  return storeImpl(new (DwarfOps.size() + 1) GenericDebugNode(
-                       Context, Storage, Hash, Tag, PreOps, DwarfOps),
-                   Storage, Context.pImpl->GenericDebugNodes);
-}
-
 void MDNode::deleteTemporary(MDNode *N) {
   assert(N->isTemporary() && "Expected temporary node");
   N->replaceAllUsesWith(nullptr);