Use same range info when emitting code and computing if instruction can deopt.

runtime/vm/flow_graph_range_analysis.h

Index: runtime/vm/flow_graph_range_analysis.h
diff --git a/runtime/vm/flow_graph_range_analysis.h b/runtime/vm/flow_graph_range_analysis.h
index 8dce8de72880c2b8c1b85901225893bb333166d8..6690e18268e23830d5a110e8947c9943883d564c 100644
--- a/runtime/vm/flow_graph_range_analysis.h
+++ b/runtime/vm/flow_graph_range_analysis.h
@@ -396,6 +396,9 @@ class Range : public ZoneAllocated {
   // Clamp this to be within size.
   void Clamp(RangeBoundary::RangeSize size);
 
+  // Clamp this to be within size and eliminate symbols.
+  void ClampToConstant(RangeBoundary::RangeSize size);
+
   static void Add(const Range* left_range,
                   const Range* right_range,
                   RangeBoundary* min,
@@ -469,6 +472,16 @@ class RangeUtils : public AllStatic {
   static bool IsPositive(Range* range) {
     return !Range::IsUnknown(range) && range->IsPositive();
   }
+
+  static bool Overlaps(Range* range, intptr_t min, intptr_t max) {
+    return Range::IsUnknown(range) || range->Overlaps(min, max);
+  }
+
+  static bool CanBeZero(Range* range) { return Overlaps(range, 0, 0); }
+
+  static bool OnlyLessThanOrEqualTo(Range* range, intptr_t value) {
+    return !Range::IsUnknown(range) && range->OnlyLessThanOrEqualTo(value);
+  }
 };