Improved printing of CheckPrototypeMaps instruction.

Review URL: https://chromiumcodereview.appspot.com/10696139

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12012 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/hydrogen-instructions.cc

@@ -1073,6 +1073,11 @@ void HCheckInstanceType::PrintDataTo(StringStream* stream) {
 }
 
 
+void HCheckPrototypeMaps::PrintDataTo(StringStream* stream) {
+  stream->Add("[receiver_prototype=%p,holder=%p]", *prototype(), *holder());
+}
+
+
 void HCallStub::PrintDataTo(StringStream* stream) {
   stream->Add("%s ",
               CodeStub::MajorName(major_key_, false));

src/hydrogen-instructions.h

@@ -2281,6 +2281,8 @@ class HCheckPrototypeMaps: public HTemplateInstruction<0> {
     return Representation::None();
   }
 
+  virtual void PrintDataTo(StringStream* stream);
+
   virtual intptr_t Hashcode() {
     ASSERT(!HEAP->IsAllocationAllowed());
     intptr_t hash = reinterpret_cast<intptr_t>(*prototype());