Implement inlined LoadIndexed operation for arrays on x64.

runtime/vm/intermediate_language.h

Index: runtime/vm/intermediate_language.h
diff --git a/runtime/vm/intermediate_language.h b/runtime/vm/intermediate_language.h
index 1f3050235109efdb33afc82c33aa39d1fd9594da..1bb9b81d1bddbe2d83d7d16dc8076eefd4900804 100644
--- a/runtime/vm/intermediate_language.h
+++ b/runtime/vm/intermediate_language.h
@@ -42,6 +42,7 @@ class LocationSummary;
   M(StrictCompare, StrictCompareComp)                                          \
   M(EqualityCompare, EqualityCompareComp)                                      \
   M(NativeCall, NativeCallComp)                                                \
+  M(LoadIndexed, LoadIndexedComp)                                            \
   M(StoreIndexed, StoreIndexedComp)                                            \
   M(InstanceSetter, InstanceSetterComp)                                        \
   M(StaticSetter, StaticSetterComp)                                            \
@@ -781,6 +782,43 @@ class StoreStaticFieldComp : public TemplateComputation<1> {
 };
 
 
+class LoadIndexedComp : public TemplateComputation<2> {
+ public:
+  LoadIndexedComp(intptr_t token_index,
+                  intptr_t try_index,
+                  Value* array,
+                  Value* index)
+      : token_index_(token_index),
+        try_index_(try_index),
+        receiver_type_(kIllegalObjectKind) {

[srdjan, 2012/06/08 19:16:08]

ASSERT array and index are not NULL.

[Vyacheslav Egorov (Google), 2012/06/08 19:23:33]

Done.

+    inputs_[0] = array;
+    inputs_[1] = index;
+  }
+
+  DECLARE_COMPUTATION(LoadIndexed)
+
+  intptr_t token_index() const { return token_index_; }
+  intptr_t try_index() const { return try_index_; }
+  Value* array() const { return inputs_[0]; }
+  Value* index() const { return inputs_[1]; }
+
+  void set_receiver_type(ObjectKind receiver_type) {
+    receiver_type_ = receiver_type;
+  }
+
+  ObjectKind receiver_type() const {
+    return receiver_type_;
+  }
+
+ private:
+  const intptr_t token_index_;
+  const intptr_t try_index_;
+  ObjectKind receiver_type_;
+
+  DISALLOW_COPY_AND_ASSIGN(LoadIndexedComp);
+};
+
+
 // Not simply an InstanceCall because it has somewhat more complicated
 // semantics: the value operand is preserved before the call.
 class StoreIndexedComp : public TemplateComputation<3> {