MIPS: Deoptimizer support for hydrogen stubs that accept a variable number of arguments.

Port r14111 (29157ad7)

BUG=

Review URL: https://codereview.chromium.org/13461013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14120 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/code-stubs-mips.cc

@@ -96,7 +96,7 @@ static void InitializeArrayConstructorDescriptor(Isolate* isolate,
   // stack param count needs (constructor pointer, and single argument)
   descriptor->stack_parameter_count_ = &a0;
   descriptor->register_params_ = registers;
-  descriptor->extra_expression_stack_count_ = 1;
+  descriptor->function_mode_ = JS_FUNCTION_STUB_MODE;
   descriptor->deoptimization_handler_ =
       FUNCTION_ADDR(ArrayConstructor_StubFailure);
 }
@@ -8087,6 +8087,9 @@ void StubFailureTrampolineStub::Generate(MacroAssembler* masm) {
   int parameter_count_offset =
       StubFailureTrampolineFrame::kCallerStackParameterCountFrameOffset;
   __ lw(a1, MemOperand(fp, parameter_count_offset));
+  if (function_mode_ == JS_FUNCTION_STUB_MODE) {
+    __ Addu(a1, a1, Operand(1));
+  }
   masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE);
   __ sll(a1, a1, kPointerSizeLog2);
   __ Addu(sp, sp, a1);