[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/Scalar/LoopInstSimplify.cpp b/llvm/lib/Transforms/Scalar/LoopInstSimplify.cpp
index ab1a9393c52..657038eeca7 100644
--- a/llvm/lib/Transforms/Scalar/LoopInstSimplify.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopInstSimplify.cpp
@@ -145,9 +145,7 @@ bool LoopInstSimplify::runOnLoop(Loop *L, LPPassManager &LPM) {
       // bodies of subloops. We visit the headers of loops so that we can process
       // their phis, but we contract the rest of the subloop body and only follow
       // edges leading back to the original loop.
-      for (succ_iterator SI = succ_begin(BB), SE = succ_end(BB); SI != SE;
-           ++SI) {
-        BasicBlock *SuccBB = *SI;
+      for (BasicBlock *SuccBB : successors(BB)) {
         if (!Visited.insert(SuccBB))
           continue;