Add support for keyed-call on arrays of fast elements

src/deoptimizer.cc

Index: src/deoptimizer.cc
diff --git a/src/deoptimizer.cc b/src/deoptimizer.cc
index 9a1bb9d8efb97e2193051079321f3b59d9219444..ef86fa7f3a1b0e8b435d7af2424fb6130e62b502 100644
--- a/src/deoptimizer.cc
+++ b/src/deoptimizer.cc
@@ -1424,8 +1424,10 @@ void Deoptimizer::DoComputeCompiledStubFrame(TranslationIterator* iterator,
   int input_frame_size = input_->GetFrameSize();
   int output_frame_size = height_in_bytes + fixed_frame_size;
   if (trace_) {
-    PrintF("  translating %s => StubFailureTrampolineStub, height=%d\n",
-           CodeStub::MajorName(static_cast<CodeStub::Major>(major_key), false),
+    PrintF("  translating %s => StubFailure%sTrampolineStub, height=%d\n",
+           CodeStub::MajorName(
+               static_cast<CodeStub::Major>(major_key), false),
+           descriptor->HasTailCallContinuation() ? "TailCall" : "",
            height_in_bytes);
   }
 
@@ -1493,7 +1495,8 @@ void Deoptimizer::DoComputeCompiledStubFrame(TranslationIterator* iterator,
            top_address + output_frame_offset, output_frame_offset, value);
   }
 
-  intptr_t caller_arg_count = 0;
+  intptr_t caller_arg_count = descriptor->HasTailCallContinuation()
+      ? compiled_code_->arguments_count() + 1 : 0;
   bool arg_count_known = descriptor->stack_parameter_count_ == NULL;
 
   // Build the Arguments object for the caller's parameters and a pointer to it.
@@ -1567,9 +1570,13 @@ void Deoptimizer::DoComputeCompiledStubFrame(TranslationIterator* iterator,
 
   // Compute this frame's PC, state, and continuation.
   Code* trampoline = NULL;
-  StubFunctionMode function_mode = descriptor->function_mode_;
-  StubFailureTrampolineStub(function_mode).FindCodeInCache(&trampoline,
-                                                           isolate_);
+  if (descriptor->HasTailCallContinuation()) {
+    StubFailureTailCallTrampolineStub().FindCodeInCache(&trampoline, isolate_);
+  } else {
+    StubFunctionMode function_mode = descriptor->function_mode_;
+    StubFailureTrampolineStub(function_mode).FindCodeInCache(&trampoline,
+                                                             isolate_);
+  }
   ASSERT(trampoline != NULL);
   output_frame->SetPc(reinterpret_cast<intptr_t>(
       trampoline->instruction_start()));