AOT: Fix bug in receiver type propagation after unique selector calls.

runtime/vm/flow_graph_range_analysis.cc

Index: runtime/vm/flow_graph_range_analysis.cc
diff --git a/runtime/vm/flow_graph_range_analysis.cc b/runtime/vm/flow_graph_range_analysis.cc
index 28ec3251384e953c86ed956720693af7ac164a11..b19b4e63a1778120cd22b7790cfef65e8d6ba73d 100644
--- a/runtime/vm/flow_graph_range_analysis.cc
+++ b/runtime/vm/flow_graph_range_analysis.cc
@@ -271,50 +271,6 @@ void RangeAnalysis::CollectValues() {
 }
 
 
-// Returns true if use is dominated by the given instruction.
-// Note: uses that occur at instruction itself are not dominated by it.
-static bool IsDominatedUse(Instruction* dom, Value* use) {
-  BlockEntryInstr* dom_block = dom->GetBlock();
-
-  Instruction* instr = use->instruction();
-
-  PhiInstr* phi = instr->AsPhi();
-  if (phi != NULL) {
-    return dom_block->Dominates(phi->block()->PredecessorAt(use->use_index()));
-  }
-
-  BlockEntryInstr* use_block = instr->GetBlock();
-  if (use_block == dom_block) {
-    // Fast path for the case of block entry.
-    if (dom_block == dom) return true;
-
-    for (Instruction* curr = dom->next(); curr != NULL; curr = curr->next()) {
-      if (curr == instr) return true;
-    }
-
-    return false;
-  }
-
-  return dom_block->Dominates(use_block);
-}
-
-
-void RangeAnalysis::RenameDominatedUses(Definition* def,
-                                        Instruction* dom,
-                                        Definition* other) {
-  for (Value::Iterator it(def->input_use_list()); !it.Done(); it.Advance()) {
-    Value* use = it.Current();
-
-    // Skip dead phis.
-    PhiInstr* phi = use->instruction()->AsPhi();
-    ASSERT((phi == NULL) || phi->is_alive());
-    if (IsDominatedUse(dom, use)) {
-      use->BindTo(other);
-    }
-  }
-}
-
-
 // For a comparison operation return an operation for the equivalent flipped
 // comparison: a (op) b === b (op') a.
 static Token::Kind FlipComparison(Token::Kind op) {
@@ -390,7 +346,7 @@ ConstraintInstr* RangeAnalysis::InsertConstraintFor(Value* use,
   constraint = new (Z) ConstraintInstr(use->CopyWithType(), constraint_range);
 
   flow_graph_->InsertAfter(after, constraint, NULL, FlowGraph::kValue);
-  RenameDominatedUses(defn, constraint, constraint);
+  FlowGraph::RenameDominatedUses(defn, constraint, constraint);
   constraints_.Add(constraint);
   return constraint;
 }