It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Annotation.cpp b/lib/Support/Annotation.cpp
new file mode 100644
index 0000000..cfc9c2a
--- /dev/null
+++ b/lib/Support/Annotation.cpp
@@ -0,0 +1,105 @@
+//===-- Annotation.cpp - Implement the Annotation Classes -----------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the AnnotationManager class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/Annotation.h"
+#include "llvm/Support/ManagedStatic.h"
+#include <map>
+using namespace llvm;
+
+Annotation::~Annotation() {} // Designed to be subclassed
+
+Annotable::~Annotable() { // Virtual because it's designed to be subclassed...
+ Annotation *A = AnnotationList;
+ while (A) {
+ Annotation *Next = A->getNext();
+ delete A;
+ A = Next;
+ }
+}
+
+typedef std::map<const std::string, unsigned> IDMapType;
+static unsigned IDCounter = 0; // Unique ID counter
+
+// Static member to ensure initialiation on demand.
+static ManagedStatic<IDMapType> IDMap;
+
+// On demand annotation creation support...
+typedef Annotation *(*AnnFactory)(AnnotationID, const Annotable *, void *);
+typedef std::map<unsigned, std::pair<AnnFactory,void*> > FactMapType;
+
+static FactMapType *TheFactMap = 0;
+static FactMapType &getFactMap() {
+ if (TheFactMap == 0)
+ TheFactMap = new FactMapType();
+ return *TheFactMap;
+}
+
+static void eraseFromFactMap(unsigned ID) {
+ assert(TheFactMap && "No entries found!");
+ TheFactMap->erase(ID);
+ if (TheFactMap->empty()) { // Delete when empty
+ delete TheFactMap;
+ TheFactMap = 0;
+ }
+}
+
+AnnotationID AnnotationManager::getID(const std::string &Name) { // Name -> ID
+ IDMapType::iterator I = IDMap->find(Name);
+ if (I == IDMap->end()) {
+ (*IDMap)[Name] = IDCounter++; // Add a new element
+ return IDCounter-1;
+ }
+ return I->second;
+}
+
+// getID - Name -> ID + registration of a factory function for demand driven
+// annotation support.
+AnnotationID AnnotationManager::getID(const std::string &Name, Factory Fact,
+ void *Data) {
+ AnnotationID Result(getID(Name));
+ registerAnnotationFactory(Result, Fact, Data);
+ return Result;
+}
+
+// getName - This function is especially slow, but that's okay because it should
+// only be used for debugging.
+//
+const std::string &AnnotationManager::getName(AnnotationID ID) { // ID -> Name
+ IDMapType &TheMap = *IDMap;
+ for (IDMapType::iterator I = TheMap.begin(); ; ++I) {
+ assert(I != TheMap.end() && "Annotation ID is unknown!");
+ if (I->second == ID.ID) return I->first;
+ }
+}
+
+// registerAnnotationFactory - This method is used to register a callback
+// function used to create an annotation on demand if it is needed by the
+// Annotable::findOrCreateAnnotation method.
+//
+void AnnotationManager::registerAnnotationFactory(AnnotationID ID, AnnFactory F,
+ void *ExtraData) {
+ if (F)
+ getFactMap()[ID.ID] = std::make_pair(F, ExtraData);
+ else
+ eraseFromFactMap(ID.ID);
+}
+
+// createAnnotation - Create an annotation of the specified ID for the
+// specified object, using a register annotation creation function.
+//
+Annotation *AnnotationManager::createAnnotation(AnnotationID ID,
+ const Annotable *Obj) {
+ FactMapType::iterator I = getFactMap().find(ID.ID);
+ if (I == getFactMap().end()) return 0;
+ return I->second.first(ID, Obj, I->second.second);
+}