Revert 239644.

[oota-llvm.git] / lib / IR / Value.cpp

diff --git a/lib/IR/Value.cpp b/lib/IR/Value.cpp
index 18f6b1e9c3596eaf0b43815bb1e796a27d9de3d6..eb5c2253f4e0c81278310f85c35fca52e638df20 100644 (file)
--- a/lib/IR/Value.cpp
+++ b/lib/IR/Value.cpp
@@ -39,6 +39,7 @@ using namespace llvm;
 //===----------------------------------------------------------------------===//
 //                                Value Class
 //===----------------------------------------------------------------------===//
+const unsigned Value::NumUserOperandsBits;
 
 static inline Type *checkType(Type *Ty) {
   assert(Ty && "Value defined with a null type: Error!");
@@ -46,8 +47,9 @@ static inline Type *checkType(Type *Ty) {
 }
 
 Value::Value(Type *ty, unsigned scid)
-    : VTy(checkType(ty)), UseList(nullptr), SubclassID(scid), HasValueHandle(0),
-      SubclassOptionalData(0), SubclassData(0), NumOperands(0) {
+    : VTy(checkType(ty)), UseList(nullptr), SubclassID(scid),
+      HasValueHandle(0), SubclassOptionalData(0), SubclassData(0),
+      NumUserOperands(0), IsUsedByMD(false), HasName(false) {
   // FIXME: Why isn't this in the subclass gunk??
   // Note, we cannot call isa<CallInst> before the CallInst has been
   // constructed.
@@ -157,16 +159,44 @@ static bool getSymTab(Value *V, ValueSymbolTable *&ST) {
   return false;
 }
 
+ValueName *Value::getValueName() const {
+  if (!HasName) return nullptr;
+
+  LLVMContext &Ctx = getContext();
+  auto I = Ctx.pImpl->ValueNames.find(this);
+  assert(I != Ctx.pImpl->ValueNames.end() &&
+         "No name entry found!");
+
+  return I->second;
+}
+
+void Value::setValueName(ValueName *VN) {
+  LLVMContext &Ctx = getContext();
+
+  assert(HasName == Ctx.pImpl->ValueNames.count(this) &&
+         "HasName bit out of sync!");
+
+  if (!VN) {
+    if (HasName)
+      Ctx.pImpl->ValueNames.erase(this);
+    HasName = false;
+    return;
+  }
+
+  HasName = true;
+  Ctx.pImpl->ValueNames[this] = VN;
+}
+
 StringRef Value::getName() const {
   // Make sure the empty string is still a C string. For historical reasons,
   // some clients want to call .data() on the result and expect it to be null
   // terminated.
-  if (!getValueName())
+  if (!hasName())
     return StringRef("", 0);
   return getValueName()->getKey();
 }
 
-void Value::setName(const Twine &NewName) {
+void Value::setNameImpl(const Twine &NewName) {
   // Fast path for common IRBuilder case of setName("") when there is no name.
   if (NewName.isTriviallyEmpty() && !hasName())
     return;
@@ -187,9 +217,6 @@ void Value::setName(const Twine &NewName) {
   if (getSymTab(this, ST))
     return;  // Cannot set a name on this value (e.g. constant).
 
-  if (Function *F = dyn_cast<Function>(this))
-    getContext().pImpl->IntrinsicIDCache.erase(F);
-
   if (!ST) { // No symbol table to update?  Just do the change.
     if (NameRef.empty()) {
       // Free the name for this value.
@@ -222,6 +249,12 @@ void Value::setName(const Twine &NewName) {
   setValueName(ST->createValueName(NameRef, this));
 }
 
+void Value::setName(const Twine &NewName) {
+  setNameImpl(NewName);
+  if (Function *F = dyn_cast<Function>(this))
+    F->recalculateIntrinsicID();
+}
+
 void Value::takeName(Value *V) {
   ValueSymbolTable *ST = nullptr;
   // If this value has a name, drop it.