Improved printing of a few Hydrogen instructions.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
===================================================================
--- src/hydrogen-instructions.cc	(revision 9412)
+++ src/hydrogen-instructions.cc	(working copy)
@@ -707,6 +707,14 @@
 }
 
 
+void HIsNilAndBranch::PrintDataTo(StringStream* stream) {
+  value()->PrintNameTo(stream);
+  stream->Add(kind() == kStrictEquality ? " === " : " == ");
+  stream->Add(nil() == kNullValue ? "null" : "undefined");
+  HControlInstruction::PrintDataTo(stream);
+}
+
+
 void HReturn::PrintDataTo(StringStream* stream) {
   value()->PrintNameTo(stream);
 }
@@ -777,9 +785,15 @@
   value()->PrintNameTo(stream);
   stream->Add(" == ");
   stream->Add(type_literal_->GetFlatContent().ToAsciiVector());
+  HControlInstruction::PrintDataTo(stream);
 }
 
 
+void HTypeof::PrintDataTo(StringStream* stream) {
+  value()->PrintNameTo(stream);
+}
+
+
 void HChange::PrintDataTo(StringStream* stream) {
   HUnaryOperation::PrintDataTo(stream);
   stream->Add(" %s to %s", from_.Mnemonic(), to().Mnemonic());
@@ -857,6 +871,23 @@
 }
 
 
+const char* HCheckInstanceType::GetCheckName() {
+  switch (check_) {
+    case IS_SPEC_OBJECT: return "object";
+    case IS_JS_ARRAY: return "array";
+    case IS_STRING: return "string";
+    case IS_SYMBOL: return "symbol";
+    default: UNREACHABLE();
+  }
+  return "";
+}
+
+void HCheckInstanceType::PrintDataTo(StringStream* stream) {
+  stream->Add("%s ", GetCheckName());
+  HUnaryOperation::PrintDataTo(stream);
+}
+
+
 void HCallStub::PrintDataTo(StringStream* stream) {
   stream->Add("%s ",
               CodeStub::MajorName(major_key_, false));
@@ -1311,6 +1342,14 @@
 }
 
 
+void HCompareObjectEqAndBranch::PrintDataTo(StringStream* stream) {
+  left()->PrintNameTo(stream);
+  stream->Add(" ");
+  right()->PrintNameTo(stream);
+  HControlInstruction::PrintDataTo(stream);
+}
+
+
 void HGoto::PrintDataTo(StringStream* stream) {
   stream->Add("B%d", SuccessorAt(0)->block_id());
 }