Port object tests to x64.

runtime/vm/object_x64_test.cc

Index: runtime/vm/object_x64_test.cc
===================================================================
--- runtime/vm/object_x64_test.cc	(revision 1958)
+++ runtime/vm/object_x64_test.cc	(working copy)
@@ -18,30 +18,34 @@
 // Generate a simple dart code sequence.
 // This is used to test Code and Instruction object creation.
 void GenerateIncrement(Assembler* assembler) {
-  __ Unimplemented("GenerateIncrement");
+  __ movq(RAX, Immediate(0));
+  __ pushq(RAX);
+  __ incq(Address(RSP, 0));
+  __ movq(RCX, Address(RSP, 0));
+  __ incq(RCX);
+  __ popq(RAX);
+  __ movq(RAX, RCX);
+  __ ret();
 }
 
 
 // Generate a dart code sequence that embeds a string object in it.
 // This is used to test Embedded String objects in the instructions.
 void GenerateEmbedStringInCode(Assembler* assembler, const char* str) {
-  __ Unimplemented("GenerateEmbedStringInCode");
+  const String& string_object = String::ZoneHandle(String::New(str));
+  __ LoadObject(RAX, string_object);
+  __ ret();
 }
 
 
 // Generate a dart code sequence that embeds a smi object in it.
 // This is used to test Embedded Smi objects in the instructions.
-void GenerateEmbedSmiInCode(Assembler* assembler, int value) {
-  __ Unimplemented("GenerateEmbedSmiInCode");
+void GenerateEmbedSmiInCode(Assembler* assembler, intptr_t value) {
+  const Smi& smi_object = Smi::ZoneHandle(Smi::New(value));
+  __ LoadObject(RAX, smi_object);
+  __ ret();
 }
 
-
-// Generate code for a simple static dart function that returns 42.
-// This is used to test invocation of dart functions from C++.
-void GenerateReturn42(Assembler* assembler) {
-  __ Unimplemented("GenerateReturn42");
-}
-
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64