Implement crankshaft support for pixel array stores.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index a0d932fbd24311f8eeb613edc706e6002cadd60b..c4df104fe2ef3273ce6798234a46263039cde3d8 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -150,6 +150,7 @@ class LChunkBuilder;
   V(StoreContextSlot)                          \
   V(StoreGlobal)                               \
   V(StoreKeyedFastElement)                     \
+  V(StorePixelArrayElement)                    \
   V(StoreKeyedGeneric)                         \
   V(StoreNamedField)                           \
   V(StoreNamedGeneric)                         \
@@ -3170,6 +3171,43 @@ class HStoreKeyedFastElement: public HStoreKeyed {
 };
 
 
+class HStorePixelArrayElement: public HInstruction {
+ public:
+  HStorePixelArrayElement(HValue* external_elements, HValue* key, HValue* val) {
+    SetFlag(kChangesPixelArrayElements);
+    SetOperandAt(0, external_elements);
+    SetOperandAt(1, key);
+    SetOperandAt(2, val);
+  }
+
+  virtual void PrintDataTo(StringStream* stream) const;
+  virtual int OperandCount() const { return operands_.length(); }
+  virtual HValue* OperandAt(int index) const { return operands_[index]; }
+
+  virtual Representation RequiredInputRepresentation(int index) const {
+    if (index == 0) {
+      return Representation::External();
+    } else {
+      return Representation::Integer32();
+    }
+  }
+
+  HValue* external_pointer() const { return operands_[0]; }
+  HValue* key() const { return operands_[1]; }
+  HValue* value() const { return operands_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StorePixelArrayElement,
+                               "store_pixel_array_element")
+
+ protected:
+  virtual void InternalSetOperandAt(int index, HValue* value) {
+    operands_[index] = value;
+  }
+
+  HOperandVector<3> operands_;
+};
+
+
 class HStoreKeyedGeneric: public HStoreKeyed {
  public:
   HStoreKeyedGeneric(HValue* context,