Subzero. Allocate global initializers from a dedicated arena.

src/IceCfg.h

Index: src/IceCfg.h
diff --git a/src/IceCfg.h b/src/IceCfg.h
index c24319c72d8e7eda8f5432ce67102260d7ed3514..55b1de9b0e2bbc4d3a4dc08c838a39a249013024 100644
--- a/src/IceCfg.h
+++ b/src/IceCfg.h
@@ -158,6 +158,12 @@ public:
     }
     GlobalInits->push_back(Global);
   }
+  VariableDeclarationList *getGlobalPool() {
+    if (GlobalInits == nullptr) {
+      GlobalInits.reset(new VariableDeclarationList);
+    }
+    return GlobalInits.get();
+  }
   /// @}
 
   /// \name Miscellaneous accessors.
@@ -261,6 +267,11 @@ private:
   /// code needs to be defined.
   void profileBlocks();
 
+  void createNodeNameDeclaration(const IceString &NodeAsmName);
+  void
+  createBlockProfilingInfoDeclaration(const IceString &NodeAsmName,
+                                      VariableDeclaration *NodeNameDeclaration);
+
   /// Delete registered jump table placeholder instructions. This should only be
   /// called once all repointing has taken place.
   void deleteJumpTableInsts();