First step of huge frame-related refactoring: move emit{Prologue,Epilogue} out of TargetRegisterInfo to TargetFrameInfo, which is definitely much better suitable place

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119097 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp
index 4e435ee..4c01e60 100644
--- a/lib/Target/X86/X86TargetMachine.cpp
+++ b/lib/Target/X86/X86TargetMachine.cpp
@@ -119,10 +119,7 @@
                                    const std::string &FS, bool is64Bit)
   : LLVMTargetMachine(T, TT), 
     Subtarget(TT, FS, is64Bit),
-    FrameInfo(TargetFrameInfo::StackGrowsDown,
-              Subtarget.getStackAlignment(),
-              (Subtarget.isTargetWin64() ? -40 :
-               (Subtarget.is64Bit() ? -8 : -4))),
+    FrameInfo(Subtarget),
     ELFWriterInfo(is64Bit, true) {
   DefRelocModel = getRelocationModel();