Added typedef "SerializedPtrID" to represent the pointer handle written to disk

instead of just using "unsigned".  This gives us more flexibility in changing
the definition of the handle later, and is more self-documenting.

Added tracking of block stack in the Deserializer.  Now clients can query
if they are still within a block using the methods GetCurrentBlockLocation()
and FinishedBlock().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43903 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Bitcode/Writer/Serialize.cpp

@@ -14,6 +14,10 @@
 #include "llvm/Bitcode/Serialize.h"
 #include "string.h"
 
+#ifdef DEBUG_BACKPATCH
+#include "llvm/Support/Streams.h"
+#endif
+
 using namespace llvm;
 
 Serializer::Serializer(BitstreamWriter& stream)
@@ -67,15 +71,13 @@ void Serializer::EmitCStr(const char* s, const char* end) {
     Record.push_back(*s);
     ++s;
   }
-
-  EmitRecord();
 }
 
 void Serializer::EmitCStr(const char* s) {
   EmitCStr(s,s+strlen(s));
 }
 
-unsigned Serializer::getPtrId(const void* ptr) {
+SerializedPtrID Serializer::getPtrId(const void* ptr) {
   if (!ptr)
     return 0;
   
@@ -83,12 +85,20 @@ unsigned Serializer::getPtrId(const void* ptr) {
   
   if (I == PtrMap.end()) {
     unsigned id = PtrMap.size()+1;
+#ifdef DEBUG_BACKPATCH
+    llvm::cerr << "Registered PTR: " << ptr << " => " << id << "\n";
+#endif
     PtrMap[ptr] = id;
     return id;
   }
   else return I->second;
 }
 
+bool Serializer::isRegistered(const void* ptr) const {
+  MapTy::const_iterator I = PtrMap.find(ptr);
+  return I != PtrMap.end();
+}
+
 
 #define INT_EMIT(TYPE)\
 void SerializeTrait<TYPE>::Emit(Serializer&S, TYPE X) { S.EmitInt(X); }