[turbofan] Implement tail calls with differing stack parameter counts

src/compiler/register-allocator.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/base/adapters.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/register-allocator.h"
 #include "src/string-stream.h"
 
 namespace v8 {
@@ skipping 2416 matching lines @@
 void SpillSlotLocator::LocateSpillSlots() {
   auto code = data()->code();
   for (auto range : data()->live_ranges()) {
     if (range == nullptr || range->IsEmpty() || range->IsChild()) continue;
     // We care only about ranges which spill in the frame.
     if (!range->HasSpillRange()) continue;
     auto spills = range->spills_at_definition();
     DCHECK_NOT_NULL(spills);
     for (; spills != nullptr; spills = spills->next) {
       code->GetInstructionBlock(spills->gap_index)->mark_needs_frame();
+      // TODO(danno): For now, any instruction block that needs a frame forces
+      // the entire function to have a frame.
+      data()->frame()->MarkNeedsFrame();
     }
   }
 }
 
 
 OperandAssigner::OperandAssigner(RegisterAllocationData* data) : data_(data) {}
 
 
 void OperandAssigner::AssignSpillSlots() {
   auto& spill_ranges = data()->spill_ranges();
@@ skipping 437 matching lines @@
     auto eliminate = moves->PrepareInsertAfter(move);
     to_insert.push_back(move);
     if (eliminate != nullptr) to_eliminate.push_back(eliminate);
   }
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8