Const correctness fixes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7349 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index 83567a4..85bf4b6 100644
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -126,7 +126,7 @@
   getConstantPool()->print(OS);
   
   for (const_iterator BB = begin(); BB != end(); ++BB) {
-    BasicBlock *LBB = BB->getBasicBlock();
+    const BasicBlock *LBB = BB->getBasicBlock();
     OS << "\n" << LBB->getName() << " (" << (const void*)LBB << "):\n";
     for (MachineBasicBlock::const_iterator I = BB->begin(); I != BB->end();++I){
       OS << "\t";
diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp
index e221bd7..cce1c5d 100644
--- a/lib/CodeGen/PHIElimination.cpp
+++ b/lib/CodeGen/PHIElimination.cpp
@@ -200,8 +200,8 @@
           // at an appropriate point later.
           //
           bool ValueIsLive = false;
-          BasicBlock *BB = opBlock.getBasicBlock();
-          for (succ_iterator SI = succ_begin(BB), E = succ_end(BB);
+          const BasicBlock *BB = opBlock.getBasicBlock();
+          for (succ_const_iterator SI = succ_begin(BB), E = succ_end(BB);
                SI != E && !ValueIsLive; ++SI) {
             const std::pair<MachineBasicBlock*, unsigned> &
               SuccInfo = LV->getBasicBlockInfo(*SI);