Rename ExpandISelPseudo->FinalizeISel, delay register reservation

This allows targets to make more decisions about reserved registers
after isel. For example, now it should be certain there are calls or
stack objects in the frame or not, which could have been introduced by
legalization.

Patch by Matthias Braun

llvm-svn: 363757
diff --git a/llvm/lib/CodeGen/CodeGen.cpp b/llvm/lib/CodeGen/CodeGen.cpp
index 31b6bb7..c37ed57 100644
--- a/llvm/lib/CodeGen/CodeGen.cpp
+++ b/llvm/lib/CodeGen/CodeGen.cpp
@@ -30,10 +30,10 @@
   initializeEarlyIfConverterPass(Registry);
   initializeEarlyMachineLICMPass(Registry);
   initializeEarlyTailDuplicatePass(Registry);
-  initializeExpandISelPseudosPass(Registry);
   initializeExpandMemCmpPassPass(Registry);
   initializeExpandPostRAPass(Registry);
   initializeFEntryInserterPass(Registry);
+  initializeFinalizeISelPass(Registry);
   initializeFinalizeMachineBundlesPass(Registry);
   initializeFuncletLayoutPass(Registry);
   initializeGCMachineCodeAnalysisPass(Registry);