[Interpreter] Make ForInPrepare take a kRegTriple8 and ForInNext take kRegPair8 for cache state

src/compiler/bytecode-graph-builder.cc

Index: src/compiler/bytecode-graph-builder.cc
diff --git a/src/compiler/bytecode-graph-builder.cc b/src/compiler/bytecode-graph-builder.cc
index cf0b6ab43810bd8e03d384c231afb053ea419afa..dee0657d57bda942628e676f494b852634d74795 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -1724,19 +1724,11 @@ void BytecodeGraphBuilder::VisitReturn(
 
 void BytecodeGraphBuilder::VisitForInPrepare(
     const interpreter::BytecodeArrayIterator& iterator) {
-  Node* prepare = nullptr;
-  {
-    FrameStateBeforeAndAfter states(this, iterator);
-    Node* receiver = environment()->LookupAccumulator();
-    prepare = NewNode(javascript()->ForInPrepare(), receiver);
-    environment()->RecordAfterState(prepare, &states);
-  }
-  // Project cache_type, cache_array, cache_length into register
-  // operands 1, 2, 3.
-  for (int i = 0; i < 3; i++) {
-    environment()->BindRegister(iterator.GetRegisterOperand(i),
-                                NewNode(common()->Projection(i), prepare));
-  }
+  FrameStateBeforeAndAfter states(this, iterator);
+  Node* receiver = environment()->LookupAccumulator();
+  Node* prepare = NewNode(javascript()->ForInPrepare(), receiver);
+  environment()->BindRegistersToProjections(iterator.GetRegisterOperand(0),
+                                            prepare, &states);
 }
 
 
@@ -1756,11 +1748,13 @@ void BytecodeGraphBuilder::VisitForInNext(
   FrameStateBeforeAndAfter states(this, iterator);
   Node* receiver =
       environment()->LookupRegister(iterator.GetRegisterOperand(0));
-  Node* cache_type =
-      environment()->LookupRegister(iterator.GetRegisterOperand(1));
-  Node* cache_array =
-      environment()->LookupRegister(iterator.GetRegisterOperand(2));
-  Node* index = environment()->LookupRegister(iterator.GetRegisterOperand(3));
+  Node* index = environment()->LookupRegister(iterator.GetRegisterOperand(1));
+  int catch_reg_pair_index = iterator.GetRegisterOperand(2).index();
+  Node* cache_type = environment()->LookupRegister(
+      interpreter::Register(catch_reg_pair_index));
+  Node* cache_array = environment()->LookupRegister(
+      interpreter::Register(catch_reg_pair_index + 1));
+
   Node* value = NewNode(javascript()->ForInNext(), receiver, cache_array,
                         cache_type, index);
   environment()->BindAccumulator(value, &states);