Temporarily Revert "Move most EH from MachineModuleInfo to MachineFunction"

This apprears to have broken the global isel bot:
http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-globalisel_build/5174/console

This reverts commit r288293.

llvm-svn: 288322
diff --git a/llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp b/llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp
index a28a91e..712b1d3 100644
--- a/llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp
@@ -82,7 +82,7 @@
       SavedRegs.set(SystemZ::ArgGPRs[I]);
 
   // If there are any landing pads, entering them will modify r6/r7.
-  if (!MF.getLandingPads().empty()) {
+  if (!MF.getMMI().getLandingPads().empty()) {
     SavedRegs.set(SystemZ::R6D);
     SavedRegs.set(SystemZ::R7D);
   }