Move the global variables representing each Target behind accessor function

This avoids "static initialization order fiasco"

Differential Revision: https://reviews.llvm.org/D25412

llvm-svn: 283702
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index 53480eb..5dfa87b 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -35,8 +35,8 @@
 
 extern "C" void LLVMInitializeX86Target() {
   // Register the target.
-  RegisterTargetMachine<X86TargetMachine> X(TheX86_32Target);
-  RegisterTargetMachine<X86TargetMachine> Y(TheX86_64Target);
+  RegisterTargetMachine<X86TargetMachine> X(getTheX86_32Target());
+  RegisterTargetMachine<X86TargetMachine> Y(getTheX86_64Target());
 
   PassRegistry &PR = *PassRegistry::getPassRegistry();
   initializeWinEHStatePassPass(PR);