Hydrogen stubs for array constructors

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index ad418d69cd33e0f061db20ac2347a6cf82e70467..c6873ebcb31908e44f7181f3e38131bb3a8d77ee 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -647,4 +647,45 @@ bool ProfileEntryHookStub::SetFunctionEntryHook(FunctionEntryHook entry_hook) {
 }
 
 
+static void InstallDescriptor(Isolate* isolate, HydrogenCodeStub* stub) {
+  int major_key = stub->MajorKey();
+  CodeStubInterfaceDescriptor* descriptor =
+      isolate->code_stub_interface_descriptor(major_key);
+  if (descriptor->register_param_count_ < 0) {

[Hannes Payer (out of office), 2013/04/18 11:14:39]

could you add a comment explaining what is going on there?

[mvstanton, 2013/04/18 13:39:26]

It's checking if the descriptor has been initialized or not. I added a "bool
initialized() const;" method to the struct to make it self-explanatory.

+    stub->InitializeInterfaceDescriptor(isolate, descriptor);
+  }
+}
+
+
+void ArrayConstructorStubBase::InstallDescriptors(Isolate* isolate) {
+  ArrayNoArgumentConstructorStub stub1(GetInitialFastElementsKind());
+  InstallDescriptor(isolate, &stub1);
+  ArraySingleArgumentConstructorStub stub2(GetInitialFastElementsKind());
+  InstallDescriptor(isolate, &stub2);
+  ArrayNArgumentsConstructorStub stub3(GetInitialFastElementsKind());
+  InstallDescriptor(isolate, &stub3);
+}
+
+
+ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate)
+    : argument_count_(ANY) {
+  ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
+}
+
+
+ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate,
+                                           int argument_count) {
+  if (argument_count == 0) {
+    argument_count_ = NONE;
+  } else if (argument_count == 1) {
+    argument_count_ = ONE;
+  } else if (argument_count >= 2) {
+    argument_count_ = MORE_THAN_ONE;
+  } else {
+    UNREACHABLE();
+  }
+  ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
+}
+
+
 } }  // namespace v8::internal