fix (part of) memory leak on shutdown. See PR2975.

llvm-svn: 68457

examples/HowToUseJIT/HowToUseJIT.cpp

@@ -42,6 +42,7 @@
 #include "llvm/ExecutionEngine/JIT.h"
 #include "llvm/ExecutionEngine/Interpreter.h"
 #include "llvm/ExecutionEngine/GenericValue.h"
+#include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
@@ -109,5 +110,8 @@ int main() {
 
   // Import result of execution:
   outs() << "Result: " << gv.IntVal << "\n";
+  EE->freeMachineCodeForFunction(FooF);
+  delete EE;
+  llvm_shutdown();
   return 0;
 }

lib/VMCore/Type.cpp

@@ -666,6 +666,22 @@ protected:
   std::multimap<unsigned, PATypeHolder> TypesByHash;
 
 public:
+  ~TypeMapBase()
+  {
+    for (std::multimap<unsigned, PATypeHolder>::iterator I
+         = TypesByHash.begin(), E = TypesByHash.end(); I != E;) {
+      Type *Ty = I->second.get();
+      if (!Ty->isAbstract() && (isa<PointerType>(Ty) || isa<FunctionType>(Ty) ||
+                                isa<VectorType>(Ty))) {
+        TypesByHash.erase(I++);
+        // PATypeHolder won't destroy it, so we must
+        Ty->destroy();
+      }
+      else
+        ++I;
+    }
+  }
+
   void RemoveFromTypesByHash(unsigned Hash, const Type *Ty) {
     std::multimap<unsigned, PATypeHolder>::iterator I =
       TypesByHash.lower_bound(Hash);