Delete obsolete debug stub

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 2088 matching lines @@
   // Now call the static function. The breakpoint handler function
   // ensures that the call target is compiled.
   __ lw(T0, FieldAddress(T0, Code::instructions_offset()));
   __ AddImmediate(T0, Instructions::HeaderSize() - kHeapObjectTag);
   // Load arguments descriptor into S4.
   __ lw(S4, FieldAddress(S5, ICData::arguments_descriptor_offset()));
   __ jr(T0);
 }
 
 
-//  V0: return value.
-void StubCode::GenerateBreakpointReturnStub(Assembler* assembler) {
-  __ TraceSimMsg("BreakpoingReturnStub");
-  // Create a stub frame as we are pushing some objects on the stack before
-  // calling into the runtime.
-  __ EnterStubFrame();
-  __ Push(V0);
-  __ CallRuntime(kBreakpointReturnHandlerRuntimeEntry, 0);
-  __ Pop(V0);
-  __ LeaveStubFrame();
-
-  // Instead of returning to the patched Dart function, emulate the
-  // smashed return code pattern and return to the function's caller.
-  __ LeaveDartFrameAndReturn();
-}
-
-
 //  RA: return address (Dart code).
 //  S5: Inline cache data array.
 void StubCode::GenerateBreakpointDynamicStub(Assembler* assembler) {
   // Create a stub frame as we are pushing some objects on the stack before
   // calling into the runtime.
   __ TraceSimMsg("BreakpointDynamicStub");
   __ EnterStubFrame();
   __ Push(S5);
   __ CallRuntime(kBreakpointDynamicHandlerRuntimeEntry, 0);
   __ Pop(S5);
@@ skipping 330 matching lines @@
   const Register right = T0;
   __ lw(left, Address(SP, 1 * kWordSize));
   __ lw(right, Address(SP, 0 * kWordSize));
   GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp1, temp2);
   __ Ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS