AOT: Add a separate switchable call state for unlinked calls.

runtime/vm/stub_code_mips.cc

 // Copyright (c) 2013, 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_MIPS)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 2259 matching lines @@
   __ jr(T1);
 
   __ Bind(&miss);
   __ LoadIsolate(T2);
   __ lw(CODE_REG, Address(T2, Isolate::ic_miss_code_offset()));
   __ lw(T1, FieldAddress(CODE_REG, Code::entry_point_offset()));
   __ jr(T1);
 }
 
 
-
 // Called from switchable IC calls.
 //  T0: receiver
+//  S5: SingleTargetCache
+void StubCode::GenerateUnlinkedCallStub(Assembler* assembler) {
+  __ NoMonomorphicCheckedEntry();
+
+  __ EnterStubFrame();
+  __ Push(T0);  // Preserve receiver.
+
+  __ PushObject(Object::null_object());  // Result.
+  __ Push(T0);                           // Arg0: Receiver
+  __ Push(S5);                           // Arg1: UnlinkedCall
+  __ CallRuntime(kUnlinkedCallRuntimeEntry, 2);
+  __ Drop(2);
+  __ Pop(S5);  // result = IC
+
+  __ Pop(T0);  // Restore receiver.
+  __ LeaveStubFrame();
+
+  __ lw(CODE_REG, Address(THR, Thread::ic_lookup_through_code_stub_offset()));
+  __ lw(T1, FieldAddress(CODE_REG, Code::checked_entry_point_offset()));
+  __ jr(T1);
+}
+
+
+// Called from switchable IC calls.
+//  T0: receiver
 //  S5: SingleTargetCache
 // Passed to target:
 //  CODE_REG: target Code object
 void StubCode::GenerateSingleTargetCallStub(Assembler* assembler) {
   __ NoMonomorphicCheckedEntry();
 
   Label miss;
 
   __ LoadClassIdMayBeSmi(T1, T0);
   __ lhu(T2, FieldAddress(S5, SingleTargetCache::lower_limit_offset()));
@@ skipping 46 matching lines @@
 }
 
 
 void StubCode::GenerateFrameAwaitingMaterializationStub(Assembler* assembler) {
   __ break_(0);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS