IR: MDNode => Value: Add Instruction::getMDNode()

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

diff --git a/lib/IR/Globals.cpp b/lib/IR/Globals.cpp
index c905cfe31e2d213fee959961093da69ae2d3187c..cecd999657e3c3dfb7406a0748f4bd05a57cd376 100644 (file)
--- a/lib/IR/Globals.cpp
+++ b/lib/IR/Globals.cpp
@@ -20,6 +20,7 @@
 #include "llvm/IR/GlobalVariable.h"
 #include "llvm/IR/LeakDetector.h"
 #include "llvm/IR/Module.h"
+#include "llvm/IR/Operator.h"
 #include "llvm/Support/ErrorHandling.h"
 using namespace llvm;
 
@@ -28,13 +29,15 @@ using namespace llvm;
 //===----------------------------------------------------------------------===//
 
 bool GlobalValue::isMaterializable() const {
-  return getParent() && getParent()->isMaterializable(this);
+  if (const Function *F = dyn_cast<Function>(this))
+    return F->isMaterializable();
+  return false;
 }
 bool GlobalValue::isDematerializable() const {
   return getParent() && getParent()->isDematerializable(this);
 }
-bool GlobalValue::Materialize(std::string *ErrInfo) {
-  return getParent()->Materialize(this, ErrInfo);
+std::error_code GlobalValue::materialize() {
+  return getParent()->materialize(this);
 }
 void GlobalValue::Dematerialize() {
   getParent()->Dematerialize(this);
@@ -59,9 +62,16 @@ void GlobalValue::copyAttributesFrom(const GlobalValue *Src) {
 }
 
 unsigned GlobalValue::getAlignment() const {
-  if (auto *GA = dyn_cast<GlobalAlias>(this))
-    return GA->getAliasee()->getAlignment();
-
+  if (auto *GA = dyn_cast<GlobalAlias>(this)) {
+    // In general we cannot compute this at the IR level, but we try.
+    if (const GlobalObject *GO = GA->getBaseObject())
+      return GO->getAlignment();
+
+    // FIXME: we should also be able to handle:
+    // Alias = Global + Offset
+    // Alias = Absolute
+    return 0;
+  }
   return cast<GlobalObject>(this)->getAlignment();
 }
 
@@ -69,10 +79,24 @@ void GlobalObject::setAlignment(unsigned Align) {
   assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
   assert(Align <= MaximumAlignment &&
          "Alignment is greater than MaximumAlignment!");
-  setGlobalValueSubClassData(Log2_32(Align) + 1);
+  unsigned AlignmentData = Log2_32(Align) + 1;
+  unsigned OldData = getGlobalValueSubClassData();
+  setGlobalValueSubClassData((OldData & ~AlignmentMask) | AlignmentData);
   assert(getAlignment() == Align && "Alignment representation error!");
 }
 
+unsigned GlobalObject::getGlobalObjectSubClassData() const {
+  unsigned ValueData = getGlobalValueSubClassData();
+  return ValueData >> AlignmentBits;
+}
+
+void GlobalObject::setGlobalObjectSubClassData(unsigned Val) {
+  unsigned OldData = getGlobalValueSubClassData();
+  setGlobalValueSubClassData((OldData & AlignmentMask) |
+                             (Val << AlignmentBits));
+  assert(getGlobalObjectSubClassData() == Val && "representation error");
+}
+
 void GlobalObject::copyAttributesFrom(const GlobalValue *Src) {
   const auto *GV = cast<GlobalObject>(Src);
   GlobalValue::copyAttributesFrom(GV);
@@ -80,12 +104,26 @@ void GlobalObject::copyAttributesFrom(const GlobalValue *Src) {
   setSection(GV->getSection());
 }
 
-const std::string &GlobalValue::getSection() const {
-  if (auto *GA = dyn_cast<GlobalAlias>(this))
-    return GA->getAliasee()->getSection();
+const char *GlobalValue::getSection() const {
+  if (auto *GA = dyn_cast<GlobalAlias>(this)) {
+    // In general we cannot compute this at the IR level, but we try.
+    if (const GlobalObject *GO = GA->getBaseObject())
+      return GO->getSection();
+    return "";
+  }
   return cast<GlobalObject>(this)->getSection();
 }
 
+Comdat *GlobalValue::getComdat() {
+  if (auto *GA = dyn_cast<GlobalAlias>(this)) {
+    // In general we cannot compute this at the IR level, but we try.
+    if (const GlobalObject *GO = GA->getBaseObject())
+      return const_cast<GlobalObject *>(GO)->getComdat();
+    return nullptr;
+  }
+  return cast<GlobalObject>(this)->getComdat();
+}
+
 void GlobalObject::setSection(StringRef S) { Section = S; }
 
 bool GlobalValue::isDeclaration() const {
@@ -95,7 +133,7 @@ bool GlobalValue::isDeclaration() const {
 
   // Functions are definitions if they have a body.
   if (const Function *F = dyn_cast<Function>(this))
-    return F->empty();
+    return F->empty() && !F->isMaterializable();
 
   // Aliases are always definitions.
   assert(isa<GlobalAlias>(this));
@@ -113,8 +151,9 @@ GlobalVariable::GlobalVariable(Type *Ty, bool constant, LinkageTypes Link,
     : GlobalObject(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal,
                    OperandTraits<GlobalVariable>::op_begin(this),
                    InitVal != nullptr, Link, Name),
-      isConstantGlobal(constant), threadLocalMode(TLMode),
+      isConstantGlobal(constant),
       isExternallyInitializedConstant(isExternallyInitialized) {
+  setThreadLocalMode(TLMode);
   if (InitVal) {
     assert(InitVal->getType() == Ty &&
            "Initializer should be the same type as the GlobalVariable!");
@@ -132,8 +171,9 @@ GlobalVariable::GlobalVariable(Module &M, Type *Ty, bool constant,
     : GlobalObject(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal,
                    OperandTraits<GlobalVariable>::op_begin(this),
                    InitVal != nullptr, Link, Name),
-      isConstantGlobal(constant), threadLocalMode(TLMode),
+      isConstantGlobal(constant),
       isExternallyInitializedConstant(isExternallyInitialized) {
+  setThreadLocalMode(TLMode);
   if (InitVal) {
     assert(InitVal->getType() == Ty &&
            "Initializer should be the same type as the GlobalVariable!");
@@ -214,7 +254,7 @@ void GlobalVariable::copyAttributesFrom(const GlobalValue *Src) {
 //===----------------------------------------------------------------------===//
 
 GlobalAlias::GlobalAlias(Type *Ty, unsigned AddressSpace, LinkageTypes Link,
-                         const Twine &Name, GlobalObject *Aliasee,
+                         const Twine &Name, Constant *Aliasee,
                          Module *ParentModule)
     : GlobalValue(PointerType::get(Ty, AddressSpace), Value::GlobalAliasVal,
                   &Op<0>(), 1, Link, Name) {
@@ -227,7 +267,7 @@ GlobalAlias::GlobalAlias(Type *Ty, unsigned AddressSpace, LinkageTypes Link,
 
 GlobalAlias *GlobalAlias::create(Type *Ty, unsigned AddressSpace,
                                  LinkageTypes Link, const Twine &Name,
-                                 GlobalObject *Aliasee, Module *ParentModule) {
+                                 Constant *Aliasee, Module *ParentModule) {
   return new GlobalAlias(Ty, AddressSpace, Link, Name, Aliasee, ParentModule);
 }
 
@@ -239,18 +279,18 @@ GlobalAlias *GlobalAlias::create(Type *Ty, unsigned AddressSpace,
 
 GlobalAlias *GlobalAlias::create(Type *Ty, unsigned AddressSpace,
                                  LinkageTypes Linkage, const Twine &Name,
-                                 GlobalObject *Aliasee) {
+                                 GlobalValue *Aliasee) {
   return create(Ty, AddressSpace, Linkage, Name, Aliasee, Aliasee->getParent());
 }
 
 GlobalAlias *GlobalAlias::create(LinkageTypes Link, const Twine &Name,
-                                 GlobalObject *Aliasee) {
+                                 GlobalValue *Aliasee) {
   PointerType *PTy = Aliasee->getType();
   return create(PTy->getElementType(), PTy->getAddressSpace(), Link, Name,
                 Aliasee);
 }
 
-GlobalAlias *GlobalAlias::create(const Twine &Name, GlobalObject *Aliasee) {
+GlobalAlias *GlobalAlias::create(const Twine &Name, GlobalValue *Aliasee) {
   return create(Aliasee->getLinkage(), Name, Aliasee);
 }
 
@@ -270,4 +310,8 @@ void GlobalAlias::eraseFromParent() {
   getParent()->getAliasList().erase(this);
 }
 
-void GlobalAlias::setAliasee(GlobalObject *Aliasee) { setOperand(0, Aliasee); }
+void GlobalAlias::setAliasee(Constant *Aliasee) {
+  assert((!Aliasee || Aliasee->getType() == getType()) &&
+         "Alias and aliasee types should match!");
+  setOperand(0, Aliasee);
+}