[turbofan] Rework handling of loop exits in loop peeling.

src/compiler/loop-peeling.h

Index: src/compiler/loop-peeling.h
diff --git a/src/compiler/loop-peeling.h b/src/compiler/loop-peeling.h
index 3cbca782a705366d08bb1ec5f2db3d8b8612feb4..ea963b0f9c8ed30c11c6365e6d9417910ac673ef 100644
--- a/src/compiler/loop-peeling.h
+++ b/src/compiler/loop-peeling.h
@@ -29,6 +29,7 @@ class CommonOperatorBuilder;
 // Implements loop peeling.
 class LoopPeeler {
  public:
+  static bool CanPeel(LoopTree* loop_tree, LoopTree::Loop* loop);
   static PeeledIteration* Peel(Graph* graph, CommonOperatorBuilder* common,
                                LoopTree* loop_tree, LoopTree::Loop* loop,
                                Zone* tmp_zone);