Fix crashes in debug output of generated stubs

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 0e6ea00058f299ab0966d2e5055e1a70f6da9858..d46ae2fd02b5066ccf5929b0d5491403eee5f23f 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1031,8 +1031,10 @@ void HChange::PrintDataTo(StringStream* stream) {
 
 void HJSArrayLength::PrintDataTo(StringStream* stream) {
   value()->PrintNameTo(stream);
-  stream->Add(" ");
-  typecheck()->PrintNameTo(stream);
+  if (HasTypeCheck()) {
+    stream->Add(" ");
+    typecheck()->PrintNameTo(stream);
+  }
 }
 
 
@@ -1144,8 +1146,10 @@ void HCheckInstanceType::GetCheckMaskAndTag(uint8_t* mask, uint8_t* tag) {
 
 void HLoadElements::PrintDataTo(StringStream* stream) {
   value()->PrintNameTo(stream);
-  stream->Add(" ");
-  typecheck()->PrintNameTo(stream);
+  if (HasTypeCheck()) {
+    stream->Add(" ");
+    typecheck()->PrintNameTo(stream);
+  }
 }
 
 
@@ -2023,12 +2027,16 @@ void HLoadKeyed::PrintDataTo(StringStream* stream) {
   stream->Add("[");
   key()->PrintNameTo(stream);
   if (IsDehoisted()) {
-    stream->Add(" + %d] ", index_offset());
+    stream->Add(" + %d]", index_offset());
   } else {
-    stream->Add("] ");
+    stream->Add("]");
+  }
+
+  if (HasDependency()) {
+    stream->Add(" ");
+    dependency()->PrintNameTo(stream);
   }
 
-  dependency()->PrintNameTo(stream);
   if (RequiresHoleCheck()) {
     stream->Add(" check_hole");
   }