Revert "VM: New calling convention for generated code."

runtime/vm/instructions_x64_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/instructions.h"
 #include "vm/stub_code.h"
@@ skipping 17 matching lines @@
   __ pushq(PP);
   __ LoadPoolPointer();
   prologue_code_size = assembler->CodeSize();
   __ JmpPatchable(*StubCode::InvokeDartCode_entry(), PP);
   __ JmpPatchable(*StubCode::AllocateArray_entry(), PP);
   __ popq(PP);
   __ ret();
 }
 
 
+ASSEMBLER_TEST_RUN(Jump, test) {
+  ASSERT(prologue_code_size != -1);
+  const Code& code = test->code();
+  const Instructions& instrs = Instructions::Handle(code.instructions());
+  bool status =
+      VirtualMemory::Protect(reinterpret_cast<void*>(instrs.EntryPoint()),
+                             instrs.size(),
+                             VirtualMemory::kReadWrite);
+  EXPECT(status);
+  JumpPattern jump1(test->entry() + prologue_code_size, test->code());
+  jump1.IsValid();
+  EXPECT_EQ(StubCode::InvokeDartCode_entry()->label().address(),
+            jump1.TargetAddress());
+  JumpPattern jump2((test->entry() +
+                     jump1.pattern_length_in_bytes() + prologue_code_size),
+                    test->code());
+  const Code& array_stub =
+      Code::Handle(StubCode::AllocateArray_entry()->code());
+  EXPECT_EQ(array_stub.EntryPoint(), jump2.TargetAddress());
+  uword target1 = jump1.TargetAddress();
+  uword target2 = jump2.TargetAddress();
+  jump1.SetTargetAddress(target2);
+  jump2.SetTargetAddress(target1);
+  EXPECT_EQ(array_stub.EntryPoint(), jump1.TargetAddress());
+  EXPECT_EQ(StubCode::InvokeDartCode_entry()->label().address(),
+            jump2.TargetAddress());
+}
+
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64