Implement crankshaft support for pixel array stores.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 5accc77f0b53b8ae33e4f8be7cbbe4cf97179326..c59372a2a66de5a57728350017959f4998b368d2 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -57,10 +57,13 @@ const char* Representation::Mnemonic() const {
     case kTagged: return "t";
     case kDouble: return "d";
     case kInteger32: return "i";
-    default:
+    case kExternal: return "x";
+    case kNumRepresentations:
       UNREACHABLE();
       return NULL;
   }
+  UNREACHABLE();
+  return NULL;
 }
 
 
@@ -1202,6 +1205,15 @@ void HStoreKeyed::PrintDataTo(StringStream* stream) const {
 }
 
 
+void HStorePixelArrayElement::PrintDataTo(StringStream* stream) const {
+  external_pointer()->PrintNameTo(stream);
+  stream->Add("[");
+  key()->PrintNameTo(stream);
+  stream->Add("] = ");
+  value()->PrintNameTo(stream);
+}
+
+
 void HLoadGlobal::PrintDataTo(StringStream* stream) const {
   stream->Add("[%p]", *cell());
   if (check_hole_value()) stream->Add(" (deleteable/read-only)");