Subzero. Allocate global initializers from a dedicated arena.

src/IceConverter.h

Index: src/IceConverter.h
diff --git a/src/IceConverter.h b/src/IceConverter.h
index 22288af503c0a846cf3c7f6762752689ad5a14fb..c670b50a12dea827e1e1577ca8c0c8643d0501ae 100644
--- a/src/IceConverter.h
+++ b/src/IceConverter.h
@@ -32,7 +32,8 @@ class Converter : public Translator {
 
 public:
   Converter(llvm::Module *Mod, GlobalContext *Ctx)
-      : Translator(Ctx), Mod(Mod) {}
+      : Translator(Ctx), Mod(Mod),
+        GlobalDeclarationsPool(new VariableDeclarationList()) {}
 
   ~Converter() override = default;
 
@@ -52,6 +53,8 @@ private:
       std::map<const llvm::GlobalValue *, GlobalDeclaration *>;
   GlobalDeclarationMapType GlobalDeclarationMap;
 
+  std::unique_ptr<VariableDeclarationList> GlobalDeclarationsPool;
+
   /// Walks module and generates names for unnamed globals using prefix
   /// getFlags().DefaultGlobalPrefix, if the prefix is non-empty.
   void nameUnnamedGlobalVariables(llvm::Module *Mod);