Introduce model of global initializers in Subzero.

Makefile.standalone

 # The following variables will likely need to be modified, depending on where
 # and how you built LLVM & Clang. They can be overridden in a command-line
 # invocation of make, like:
 #
 #   make LLVM_SRC_PATH=<path> LLVM_BIN_PATH=<path> \
 #        LIBCXX_INSTALL_PATH=<path> CLANG_PATH=<path> ...
 #
 
 # LLVM_SRC_PATH is the path to the root of the checked out source code. This
 # directory should contain the configure script, the include/ and lib/
@@ skipping 62 matching lines @@
         -Wno-error=unused-parameter -I$(LIBCXX_INSTALL_PATH)/include/c++/v1
 LDFLAGS := $(HOST_FLAGS) -L$(LIBCXX_INSTALL_PATH)/lib
 
 SRCS= \
         assembler.cpp \
         assembler_ia32.cpp \
         IceCfg.cpp \
         IceCfgNode.cpp \
         IceConverter.cpp \
         IceGlobalContext.cpp \
+        IceGlobalInits.cpp \
         IceInst.cpp \
         IceInstX8632.cpp \
         IceIntrinsics.cpp \
         IceLiveness.cpp \
         IceMemoryRegion.cpp \
         IceOperand.cpp \
         IceRegAlloc.cpp \
         IceRNG.cpp \
         IceTargetLowering.cpp \
         IceTargetLoweringX8632.cpp \
@@ skipping 49 matching lines @@
   CLANG_FORMAT_DIFF = clang-format-diff.py
 else
   CLANG_FORMAT_DIFF = /usr/lib/clang-format/clang-format-diff.py
 endif
 format-diff:
         git diff -U0 `git merge-base HEAD master` | \
         $(CLANG_FORMAT_DIFF) -p1 -style=LLVM -i
 
 clean:
         rm -rf llvm2ice *.o build/