Hydrogen stubs for array constructors

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index 494daa617bcb7b7a9eee62f9e27896aca2bb37ac..f546211e0241b0c5f502c946c0e4d86f584188f6 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -2516,6 +2516,7 @@ LInstruction* LChunkBuilder::DoAllocateObject(HAllocateObject* instr) {
 LInstruction* LChunkBuilder::DoAllocate(HAllocate* instr) {
   info()->MarkAsDeferredCalling();
   LOperand* context = UseAny(instr->context());
+  // TODO(mvstanton): why can't size be a constant if possible?
   LOperand* size = UseTempRegister(instr->size());
   LOperand* temp = TempRegister();
   LAllocate* result = new(zone()) LAllocate(context, size, temp);
@@ -2577,7 +2578,8 @@ LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
     ASSERT(info()->IsStub());
     CodeStubInterfaceDescriptor* descriptor =
         info()->code_stub()->GetInterfaceDescriptor(info()->isolate());
-    Register reg = descriptor->register_params_[instr->index()];
+    int index = static_cast<int>(instr->index());
+    Register reg = DESCRIPTOR_GET_PARAMETER_REGISTER(descriptor, index);
     return DefineFixed(result, reg);
   }
 }