[AVR] Prefer BasicBlock::getIterator over Function::begin()

Thanks to Eli Friedman for the suggestion.

llvm-svn: 314182

diff --git a/llvm/lib/Target/AVR/AVRISelLowering.cpp b/llvm/lib/Target/AVR/AVRISelLowering.cpp
index 50255f3..890379d 100644 (file)
--- a/llvm/lib/Target/AVR/AVRISelLowering.cpp
+++ b/llvm/lib/Target/AVR/AVRISelLowering.cpp
@@ -1471,7 +1471,7 @@ MachineBasicBlock *AVRTargetLowering::insertShift(MachineInstr &MI,
   const BasicBlock *LLVM_BB = BB->getBasicBlock();
 
   MachineFunction::iterator I;
-  for (I = F->begin(); I != F->end() && &(*I) != BB; ++I);
+  for (I = BB->getIterator(); I != F->end() && &(*I) != BB; ++I);
   if (I != F->end()) ++I;
 
   // Create loop block.