Change the createSpiller interface to take a MachineFunctionPass argument.

The spillers can pluck the analyses they need from the pass reference.

Switch some never-null pointers to references.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108969 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index 98200af..2d6184c 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -483,7 +483,7 @@
   vrm_ = &getAnalysis<VirtRegMap>();
   if (!rewriter_.get()) rewriter_.reset(createVirtRegRewriter());
   
-  spiller_.reset(createSpiller(mf_, li_, loopInfo, vrm_));
+  spiller_.reset(createSpiller(*this, *mf_, *vrm_));
   
   initIntervalSets();