Shorten live ranges of argument subexpressions.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 3f39888e9bfbb6dfb547274339b3b5f2c9092412..e5ae1b2da8cc43130e8f92c9a8516863ae4d9d5a 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -521,20 +521,14 @@ void HInstruction::Verify() const {
 #endif
 
 
-HCall::HCall(int count) : arguments_(Zone::NewArray<HValue*>(count), count) {
-  for (int i = 0; i < count; ++i) arguments_[i] = NULL;
+HCall::HCall(int argument_count) : argument_count_(argument_count) {
   set_representation(Representation::Tagged());
   SetFlagMask(AllSideEffects());
 }
 
 
 void HCall::PrintDataTo(StringStream* stream) const {
-  stream->Add("(");
-  for (int i = 0; i < arguments_.length(); ++i) {
-    if (i != 0) stream->Add(", ");
-    arguments_.at(i)->PrintNameTo(stream);
-  }
-  stream->Add(")");
+  stream->Add("#%d", argument_count());
 }
 
 
@@ -554,12 +548,6 @@ void HAccessArgumentsAt::PrintDataTo(StringStream* stream) const {
 }
 
 
-void HCall::SetArgumentAt(int index, HPushArgument* push_argument) {
-  push_argument->set_argument_index(index);
-  SetOperandAt(index, push_argument);
-}
-
-
 void HCallConstantFunction::PrintDataTo(StringStream* stream) const {
   if (IsApplyFunction()) {
     stream->Add("SPECIAL function: apply");
@@ -662,14 +650,6 @@ void HTypeofIs::PrintDataTo(StringStream* stream) const {
 }
 
 
-void HPushArgument::PrintDataTo(StringStream* stream) const {
-  HUnaryOperation::PrintDataTo(stream);
-  if (argument_index() != -1) {
-    stream->Add(" [%d]", argument_index_);
-  }
-}
-
-
 void HChange::PrintDataTo(StringStream* stream) const {
   HUnaryOperation::PrintDataTo(stream);
   stream->Add(" %s to %s", from_.Mnemonic(), to_.Mnemonic());
@@ -701,12 +681,7 @@ void HCheckFunction::PrintDataTo(StringStream* stream) const {
 void HCallKeyed::PrintDataTo(StringStream* stream) const {
   stream->Add("[");
   key()->PrintNameTo(stream);
-  stream->Add("](");
-  for (int i = 1; i < arguments_.length(); ++i) {
-    if (i != 1) stream->Add(", ");
-    arguments_.at(i)->PrintNameTo(stream);
-  }
-  stream->Add(")");
+  stream->Add("]");
 }
 
 
@@ -724,12 +699,23 @@ void HCallGlobal::PrintDataTo(StringStream* stream) const {
 }
 
 
+void HCallKnownGlobal::PrintDataTo(StringStream* stream) const {
+  receiver()->PrintNameTo(stream);
+}
+
+
+void HCallNew::PrintDataTo(StringStream* stream) const {
+  constructor()->PrintNameTo(stream);
+}
+
+
 void HCallRuntime::PrintDataTo(StringStream* stream) const {
   SmartPointer<char> name_string = name()->ToCString();
   stream->Add("%s ", *name_string);
   HCall::PrintDataTo(stream);
 }
 
+
 void HCallStub::PrintDataTo(StringStream* stream) const {
   stream->Add("%s(%d)",
               CodeStub::MajorName(major_key_, false),