Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123170 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp
index c3b236a..2e4bcde 100644
--- a/lib/Target/X86/X86TargetMachine.cpp
+++ b/lib/Target/X86/X86TargetMachine.cpp
@@ -119,7 +119,7 @@
                                    const std::string &FS, bool is64Bit)
   : LLVMTargetMachine(T, TT),
     Subtarget(TT, FS, is64Bit),
-    FrameInfo(*this, Subtarget),
+    FrameLowering(*this, Subtarget),
     ELFWriterInfo(is64Bit, true) {
   DefRelocModel = getRelocationModel();