commit 89dae971b18a86c7191f85bee8afcf385af5ce92
author Evan Cheng <evan.cheng@apple.com> Tue Dec 06 02:49:06 2011 +0000
committer Evan Cheng <evan.cheng@apple.com> Tue Dec 06 02:49:06 2011 +0000
tree 64bf96514b2d6921f8643bb20236e6c34be45d77
parent d3743fc092c5b547552857abd45e1863eecb0377

Mix some minor misuse of MachineBasicBlock iterator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145903 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/MachineSSAUpdater.cpp

diff --git a/lib/CodeGen/MachineSSAUpdater.cpp b/lib/CodeGen/MachineSSAUpdater.cpp
index 84d6df2..8cb6112 100644
--- a/lib/CodeGen/MachineSSAUpdater.cpp
+++ b/lib/CodeGen/MachineSSAUpdater.cpp
@@ -81,7 +81,7 @@
   if (BB->empty())
     return 0;
 
-  MachineBasicBlock::iterator I = BB->front();
+  MachineBasicBlock::iterator I = BB->begin();
   if (!I->isPHI())
     return 0;
 
@@ -182,7 +182,7 @@
     return DupPHI;
 
   // Otherwise, we do need a PHI: insert one now.
-  MachineBasicBlock::iterator Loc = BB->empty() ? BB->end() : BB->front();
+  MachineBasicBlock::iterator Loc = BB->empty() ? BB->end() : BB->begin();
   MachineInstr *InsertedPHI = InsertNewDef(TargetOpcode::PHI, BB,
                                            Loc, VRC, MRI, TII);
 
@@ -311,7 +311,7 @@
   /// Add it into the specified block and return the register.
   static unsigned CreateEmptyPHI(MachineBasicBlock *BB, unsigned NumPreds,
                                  MachineSSAUpdater *Updater) {
-    MachineBasicBlock::iterator Loc = BB->empty() ? BB->end() : BB->front();
+    MachineBasicBlock::iterator Loc = BB->empty() ? BB->end() : BB->begin();
     MachineInstr *PHI = InsertNewDef(TargetOpcode::PHI, BB, Loc,
                                      Updater->VRC, Updater->MRI,
                                      Updater->TII);