1 files changed, 70 insertions, 53 deletions

diff --git a/contrib/llvm/lib/IR/Metadata.cpp b/contrib/llvm/lib/IR/Metadata.cpp
index f35c64b..1d19304 100644
--- a/contrib/llvm/lib/IR/Metadata.cpp
+++ b/contrib/llvm/lib/IR/Metadata.cpp
@@ -16,6 +16,7 @@
 #include "MetadataImpl.h"
 #include "SymbolTableListTraitsImpl.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/IR/ConstantRange.h"
@@ -313,8 +314,7 @@ ValueAsMetadata *ValueAsMetadata::get(Value *V) {
   if (!Entry) {
     assert((isa<Constant>(V) || isa<Argument>(V) || isa<Instruction>(V)) &&
            "Expected constant or function-local value");
-    assert(!V->IsUsedByMD &&
-           "Expected this to be the only metadata use");
+    assert(!V->IsUsedByMD && "Expected this to be the only metadata use");
     V->IsUsedByMD = true;
     if (auto *C = dyn_cast<Constant>(V))
       Entry = new ConstantAsMetadata(C);
@@ -359,14 +359,12 @@ void ValueAsMetadata::handleRAUW(Value *From, Value *To) {
   auto &Store = Context.pImpl->ValuesAsMetadata;
   auto I = Store.find(From);
   if (I == Store.end()) {
-    assert(!From->IsUsedByMD &&
-           "Expected From not to be used by metadata");
+    assert(!From->IsUsedByMD && "Expected From not to be used by metadata");
     return;
   }
 
   // Remove old entry from the map.
-  assert(From->IsUsedByMD &&
-         "Expected From to be used by metadata");
+  assert(From->IsUsedByMD && "Expected From to be used by metadata");
   From->IsUsedByMD = false;
   ValueAsMetadata *MD = I->second;
   assert(MD && "Expected valid metadata");
@@ -403,8 +401,7 @@ void ValueAsMetadata::handleRAUW(Value *From, Value *To) {
   }
 
   // Update MD in place (and update the map entry).
-  assert(!To->IsUsedByMD &&
-         "Expected this to be the only metadata use");
+  assert(!To->IsUsedByMD && "Expected this to be the only metadata use");
   To->IsUsedByMD = true;
   MD->V = To;
   Entry = MD;
@@ -416,7 +413,7 @@ void ValueAsMetadata::handleRAUW(Value *From, Value *To) {
 
 MDString *MDString::get(LLVMContext &Context, StringRef Str) {
   auto &Store = Context.pImpl->MDStringCache;
-  auto I = Store.emplace_second(Str);
+  auto I = Store.try_emplace(Str);
   auto &MapEntry = I.first->getValue();
   if (!I.second)
     return &MapEntry;
@@ -437,7 +434,7 @@ StringRef MDString::getString() const {
 // prepended to them.
 #define HANDLE_MDNODE_LEAF(CLASS)                                              \
   static_assert(                                                               \
-      llvm::AlignOf<uint64_t>::Alignment >= llvm::AlignOf<CLASS>::Alignment,   \
+      alignof(uint64_t) >= alignof(CLASS),                                     \
       "Alignment is insufficient after objects prepended to " #CLASS);
 #include "llvm/IR/Metadata.def"
 
@@ -445,7 +442,7 @@ void *MDNode::operator new(size_t Size, unsigned NumOps) {
   size_t OpSize = NumOps * sizeof(MDOperand);
   // uint64_t is the most aligned type we need support (ensured by static_assert
   // above)
-  OpSize = alignTo(OpSize, llvm::alignOf<uint64_t>());
+  OpSize = alignTo(OpSize, alignof(uint64_t));
   void *Ptr = reinterpret_cast<char *>(::operator new(OpSize + Size)) + OpSize;
   MDOperand *O = static_cast<MDOperand *>(Ptr);
   for (MDOperand *E = O - NumOps; O != E; --O)
@@ -456,7 +453,7 @@ void *MDNode::operator new(size_t Size, unsigned NumOps) {
 void MDNode::operator delete(void *Mem) {
   MDNode *N = static_cast<MDNode *>(Mem);
   size_t OpSize = N->NumOperands * sizeof(MDOperand);
-  OpSize = alignTo(OpSize, llvm::alignOf<uint64_t>());
+  OpSize = alignTo(OpSize, alignof(uint64_t));
 
   MDOperand *O = static_cast<MDOperand *>(Mem);
   for (MDOperand *E = O - N->NumOperands; O != E; --O)
@@ -862,42 +859,32 @@ MDNode *MDNode::concatenate(MDNode *A, MDNode *B) {
   if (!B)
     return A;
 
-  SmallVector<Metadata *, 4> MDs;
-  MDs.reserve(A->getNumOperands() + B->getNumOperands());
-  MDs.append(A->op_begin(), A->op_end());
-  MDs.append(B->op_begin(), B->op_end());
+  SmallSetVector<Metadata *, 4> MDs(A->op_begin(), A->op_end());
+  MDs.insert(B->op_begin(), B->op_end());
 
   // FIXME: This preserves long-standing behaviour, but is it really the right
   // behaviour?  Or was that an unintended side-effect of node uniquing?
-  return getOrSelfReference(A->getContext(), MDs);
+  return getOrSelfReference(A->getContext(), MDs.getArrayRef());
 }
 
 MDNode *MDNode::intersect(MDNode *A, MDNode *B) {
   if (!A || !B)
     return nullptr;
 
-  SmallVector<Metadata *, 4> MDs;
-  for (Metadata *MD : A->operands())
-    if (std::find(B->op_begin(), B->op_end(), MD) != B->op_end())
-      MDs.push_back(MD);
+  SmallSetVector<Metadata *, 4> MDs(A->op_begin(), A->op_end());
+  SmallPtrSet<Metadata *, 4> BSet(B->op_begin(), B->op_end());
+  MDs.remove_if([&](Metadata *MD) { return !is_contained(BSet, MD); });
 
   // FIXME: This preserves long-standing behaviour, but is it really the right
   // behaviour?  Or was that an unintended side-effect of node uniquing?
-  return getOrSelfReference(A->getContext(), MDs);
+  return getOrSelfReference(A->getContext(), MDs.getArrayRef());
 }
 
 MDNode *MDNode::getMostGenericAliasScope(MDNode *A, MDNode *B) {
   if (!A || !B)
     return nullptr;
 
-  SmallVector<Metadata *, 4> MDs(B->op_begin(), B->op_end());
-  for (Metadata *MD : A->operands())
-    if (std::find(B->op_begin(), B->op_end(), MD) == B->op_end())
-      MDs.push_back(MD);
-
-  // FIXME: This preserves long-standing behaviour, but is it really the right
-  // behaviour?  Or was that an unintended side-effect of node uniquing?
-  return getOrSelfReference(A->getContext(), MDs);
+  return concatenate(A, B);
 }
 
 MDNode *MDNode::getMostGenericFPMath(MDNode *A, MDNode *B) {
@@ -1065,17 +1052,11 @@ void NamedMDNode::setOperand(unsigned I, MDNode *New) {
   getNMDOps(Operands)[I].reset(New);
 }
 
-void NamedMDNode::eraseFromParent() {
-  getParent()->eraseNamedMetadata(this);
-}
+void NamedMDNode::eraseFromParent() { getParent()->eraseNamedMetadata(this); }
 
-void NamedMDNode::dropAllReferences() {
-  getNMDOps(Operands).clear();
-}
+void NamedMDNode::clearOperands() { getNMDOps(Operands).clear(); }
 
-StringRef NamedMDNode::getName() const {
-  return StringRef(Name);
-}
+StringRef NamedMDNode::getName() const { return StringRef(Name); }
 
 //===----------------------------------------------------------------------===//
 // Instruction Metadata method implementations.
@@ -1173,14 +1154,13 @@ MDNode *Instruction::getMetadataImpl(StringRef Kind) const {
 }
 
 void Instruction::dropUnknownNonDebugMetadata(ArrayRef<unsigned> KnownIDs) {
-  SmallSet<unsigned, 5> KnownSet;
-  KnownSet.insert(KnownIDs.begin(), KnownIDs.end());
-
   if (!hasMetadataHashEntry())
     return; // Nothing to remove!
 
   auto &InstructionMetadata = getContext().pImpl->InstructionMetadata;
 
+  SmallSet<unsigned, 4> KnownSet;
+  KnownSet.insert(KnownIDs.begin(), KnownIDs.end());
   if (KnownSet.empty()) {
     // Just drop our entry at the store.
     InstructionMetadata.erase(this);
@@ -1209,7 +1189,7 @@ void Instruction::setMetadata(unsigned KindID, MDNode *Node) {
     DbgLoc = DebugLoc(Node);
     return;
   }
-  
+
   // Handle the case when we're adding/updating metadata on an instruction.
   if (Node) {
     auto &Info = getContext().pImpl->InstructionMetadata[this];
@@ -1226,7 +1206,7 @@ void Instruction::setMetadata(unsigned KindID, MDNode *Node) {
           (getContext().pImpl->InstructionMetadata.count(this) > 0)) &&
          "HasMetadata bit out of date!");
   if (!hasMetadataHashEntry())
-    return;  // Nothing to remove!
+    return; // Nothing to remove!
   auto &Info = getContext().pImpl->InstructionMetadata[this];
 
   // Handle removal of an existing value.
@@ -1261,12 +1241,13 @@ MDNode *Instruction::getMetadataImpl(unsigned KindID) const {
 void Instruction::getAllMetadataImpl(
     SmallVectorImpl<std::pair<unsigned, MDNode *>> &Result) const {
   Result.clear();
-  
+
   // Handle 'dbg' as a special case since it is not stored in the hash table.
   if (DbgLoc) {
     Result.push_back(
         std::make_pair((unsigned)LLVMContext::MD_dbg, DbgLoc.getAsMDNode()));
-    if (!hasMetadataHashEntry()) return;
+    if (!hasMetadataHashEntry())
+      return;
   }
 
   assert(hasMetadataHashEntry() &&
@@ -1288,10 +1269,11 @@ void Instruction::getAllMetadataOtherThanDebugLocImpl(
   Info.getAll(Result);
 }
 
-bool Instruction::extractProfMetadata(uint64_t &TrueVal, uint64_t &FalseVal) {
-  assert((getOpcode() == Instruction::Br ||
-          getOpcode() == Instruction::Select) &&
-         "Looking for branch weights on something besides branch or select");
+bool Instruction::extractProfMetadata(uint64_t &TrueVal,
+                                      uint64_t &FalseVal) const {
+  assert(
+      (getOpcode() == Instruction::Br || getOpcode() == Instruction::Select) &&
+      "Looking for branch weights on something besides branch or select");
 
   auto *ProfileData = getMetadata(LLVMContext::MD_prof);
   if (!ProfileData || ProfileData->getNumOperands() != 3)
@@ -1312,11 +1294,12 @@ bool Instruction::extractProfMetadata(uint64_t &TrueVal, uint64_t &FalseVal) {
   return true;
 }
 
-bool Instruction::extractProfTotalWeight(uint64_t &TotalVal) {
+bool Instruction::extractProfTotalWeight(uint64_t &TotalVal) const {
   assert((getOpcode() == Instruction::Br ||
           getOpcode() == Instruction::Select ||
           getOpcode() == Instruction::Call ||
-          getOpcode() == Instruction::Invoke) &&
+          getOpcode() == Instruction::Invoke ||
+          getOpcode() == Instruction::Switch) &&
          "Looking for branch weights on something besides branch");
 
   TotalVal = 0;
@@ -1433,7 +1416,29 @@ void GlobalObject::copyMetadata(const GlobalObject *Other, unsigned Offset) {
                   *MDNode::get(getContext(), {NewOffsetMD, TypeId}));
       continue;
     }
-    addMetadata(MD.first, *MD.second);
+    // If an offset adjustment was specified we need to modify the DIExpression
+    // to prepend the adjustment:
+    // !DIExpression(DW_OP_plus, Offset, [original expr])
+    auto *Attachment = MD.second;
+    if (Offset != 0 && MD.first == LLVMContext::MD_dbg) {
+      DIGlobalVariable *GV = dyn_cast<DIGlobalVariable>(Attachment);
+      DIExpression *E = nullptr;
+      if (!GV) {
+        auto *GVE = cast<DIGlobalVariableExpression>(Attachment);
+        GV = GVE->getVariable();
+        E = GVE->getExpression();
+      }
+      ArrayRef<uint64_t> OrigElements;
+      if (E)
+        OrigElements = E->getElements();
+      std::vector<uint64_t> Elements(OrigElements.size() + 2);
+      Elements[0] = dwarf::DW_OP_plus;
+      Elements[1] = Offset;
+      std::copy(OrigElements.begin(), OrigElements.end(), Elements.begin() + 2);
+      E = DIExpression::get(getContext(), Elements);
+      Attachment = DIGlobalVariableExpression::get(getContext(), GV, E);
+    }
+    addMetadata(MD.first, *Attachment);
   }
 }
 
@@ -1453,3 +1458,15 @@ void Function::setSubprogram(DISubprogram *SP) {
 DISubprogram *Function::getSubprogram() const {
   return cast_or_null<DISubprogram>(getMetadata(LLVMContext::MD_dbg));
 }
+
+void GlobalVariable::addDebugInfo(DIGlobalVariableExpression *GV) {
+  addMetadata(LLVMContext::MD_dbg, *GV);
+}
+
+void GlobalVariable::getDebugInfo(
+    SmallVectorImpl<DIGlobalVariableExpression *> &GVs) const {
+  SmallVector<MDNode *, 1> MDs;
+  getMetadata(LLVMContext::MD_dbg, MDs);
+  for (MDNode *MD : MDs)
+    GVs.push_back(cast<DIGlobalVariableExpression>(MD));
+}