[turbofan] Implement tail calls with differing stack parameter counts

src/compiler/js-operator.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/compiler/js-operator.h"
 
 #include <limits>
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
@@ skipping 44 matching lines @@
   return !(lhs == rhs);
 }
 
 
 size_t hash_value(CallRuntimeParameters const& p) {
   return base::hash_combine(p.id(), p.arity());
 }
 
 
 std::ostream& operator<<(std::ostream& os, CallRuntimeParameters const& p) {
-  return os << p.id() << ", " << p.arity();
+  return os << p.id() << ", " << p.arity() << ", "
+            << ((p.mode() == ALLOW_TAIL_CALLS) ? "ALLOW_TAIL_CALLS"
+                                               : "NO_TAIL_CALLS");
 }
 
 
 const CallRuntimeParameters& CallRuntimeParametersOf(const Operator* op) {
   DCHECK_EQ(IrOpcode::kJSCallRuntime, op->opcode());
   return OpParameter<CallRuntimeParameters>(op);
 }
 
 
 ContextAccess::ContextAccess(size_t depth, size_t index, bool immutable)
@@ skipping 455 matching lines @@
                                     tail_call_mode);
   return new (zone()) Operator1<CallFunctionParameters>(   // --
       IrOpcode::kJSCallFunction, Operator::kNoProperties,  // opcode
       "JSCallFunction",                                    // name
       parameters.arity(), 1, 1, 1, 1, 2,                   // inputs/outputs
       parameters);                                         // parameter
 }
 
 
 const Operator* JSOperatorBuilder::CallRuntime(Runtime::FunctionId id,
-                                               size_t arity) {
-  CallRuntimeParameters parameters(id, arity);
+                                               size_t arity,
+                                               TailCallMode mode) {
+  CallRuntimeParameters parameters(id, arity, mode);
   const Runtime::Function* f = Runtime::FunctionForId(parameters.id());
   DCHECK(f->nargs == -1 || f->nargs == static_cast<int>(parameters.arity()));
   return new (zone()) Operator1<CallRuntimeParameters>(   // --
       IrOpcode::kJSCallRuntime, Operator::kNoProperties,  // opcode
       "JSCallRuntime",                                    // name
       parameters.arity(), 1, 1, f->result_size, 1, 2,     // inputs/outputs
       parameters);                                        // parameter
 }
 
 
@@ skipping 169 matching lines @@
   return new (zone()) Operator1<Unique<String>>(                 // --
       IrOpcode::kJSCreateCatchContext, Operator::kNoProperties,  // opcode
       "JSCreateCatchContext",                                    // name
       2, 1, 1, 1, 1, 2,                                          // counts
       name);                                                     // parameter
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8