[C++11] Add predecessors(BasicBlock *) / successors(BasicBlock *) iterator ranges.

Summary: This patch introduces two new iterator ranges and updates existing code to use it.  No functional change intended.

Test Plan: All tests (make check-all) still pass.

Reviewers: dblaikie

Reviewed By: dblaikie

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D4481

llvm-svn: 213474

1 files changed, 1 insertions, 3 deletions

diff --git a/llvm/lib/Transforms/IPO/LoopExtractor.cpp b/llvm/lib/Transforms/IPO/LoopExtractor.cpp
index 20414aa05b4..3f973c716ff 100644
--- a/llvm/lib/Transforms/IPO/LoopExtractor.cpp
+++ b/llvm/lib/Transforms/IPO/LoopExtractor.cpp
@@ -229,9 +229,7 @@ void BlockExtractorPass::SplitLandingPadPreds(Function *F) {
     // Look through the landing pad's predecessors. If one of them ends in an
     // 'invoke', then we want to split the landing pad.
     bool Split = false;
-    for (pred_iterator
-           PI = pred_begin(LPad), PE = pred_end(LPad); PI != PE; ++PI) {
-      BasicBlock *BB = *PI;
+    for (BasicBlock *BB : predecessors(LPad)) {
       if (BB->isLandingPad() && BB != Parent &&
           isa<InvokeInst>(Parent->getTerminator())) {
         Split = true;