Write out global initializers and data rel directly to ELF file.

src/IceDefs.h

 //===- subzero/src/IceDefs.h - Common Subzero declaraions -------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares various useful types and classes that have
@@ skipping 42 matching lines @@
 class FunctionDeclaration;
 class GlobalContext;
 class GlobalDeclaration;
 class Inst;
 class InstAssign;
 class InstPhi;
 class InstTarget;
 class LiveRange;
 class Liveness;
 class Operand;
-class TargetGlobalLowering;
+class TargetDataLowering;
 class TargetLowering;
 class Variable;
 class VariableDeclaration;
 class VariablesMetadata;
 
 template <size_t SlabSize = 1024 * 1024>
 using ArenaAllocator =
     llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, SlabSize>;
 
 ArenaAllocator<> *getCurrentCfgAllocator();
@@ skipping 22 matching lines @@
 typedef llvm::ilist<Inst> InstList;
 // Ideally PhiList would be llvm::ilist<InstPhi>, and similar for
 // AssignList, but this runs into issues with SFINAE.
 typedef InstList PhiList;
 typedef InstList AssignList;
 // VarList and NodeList are arena-allocated from the Cfg's allocator.
 typedef std::vector<Variable *, CfgLocalAllocator<Variable *>> VarList;
 typedef std::vector<CfgNode *, CfgLocalAllocator<CfgNode *>> NodeList;
 typedef std::vector<Constant *> ConstantList;
 
+typedef std::vector<VariableDeclaration *> VariableDeclarationList;
+
 // SizeT is for holding small-ish limits like number of source
 // operands in an instruction.  It is used instead of size_t (which
 // may be 64-bits wide) when we want to save space.
 typedef uint32_t SizeT;
 
 // InstNumberT is for holding an instruction number.  Instruction
 // numbers are used for representing Variable live ranges.
 typedef int32_t InstNumberT;
 
 // A LiveBeginEndMapEntry maps a Variable::Number value to an
@@ skipping 94 matching lines @@
   return llvm::make_range(Container.rbegin(), Container.rend());
 }
 template <typename T>
 llvm::iterator_range<typename T::reverse_iterator> reverse_range(T &Container) {
   return llvm::make_range(Container.rbegin(), Container.rend());
 }
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEDEFS_H