[turbofan] Split before loops.

src/compiler/greedy-allocator.h

Index: src/compiler/greedy-allocator.h
diff --git a/src/compiler/greedy-allocator.h b/src/compiler/greedy-allocator.h
index 7b808cf8fb31fe3d6786b8a04e10b3aededdc0f5..8ac0bf138a28a611e14e88c31922271d977474a7 100644
--- a/src/compiler/greedy-allocator.h
+++ b/src/compiler/greedy-allocator.h
@@ -132,6 +132,9 @@ class GreedyAllocator final : public RegisterAllocator {
   // were made, or false if no calls were found.
   bool TrySplitAroundCalls(LiveRange* range);
 
+  // Find a split position at the outmost loop.
+  LifetimePosition FindSplitPositionBeforeLoops(LiveRange* range);
+
   // Finds the first call instruction in the path of this range. Splits before
   // and requeues that segment (if any), spills the section over the call, and
   // returns the section after the call. The return is: