[turbofan] Enable tail calls for %_CallFunction.

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 12 matching lines @@
   return !(lhs == rhs);
 }
 
 
 size_t hash_value(VectorSlotPair const& p) {
   return base::hash_combine(p.slot(), p.vector());
 }
 
 
 std::ostream& operator<<(std::ostream& os, CallFunctionParameters const& p) {
-  return os << p.arity() << ", " << p.flags() << ", " << p.language_mode();
+  os << p.arity() << ", " << p.flags() << ", " << p.language_mode();
+  if (p.AllowTailCalls()) {
+    os << ", ALLOW_TAIL_CALLS";
+  }
+  return os;
 }
 
 
 const CallFunctionParameters& CallFunctionParametersOf(const Operator* op) {
   DCHECK_EQ(IrOpcode::kJSCallFunction, op->opcode());
   return OpParameter<CallFunctionParameters>(op);
 }
 
 
 bool operator==(CallRuntimeParameters const& lhs,
@@ skipping 419 matching lines @@
       case STRONG_BIT:                                                  \
         break; /* %*!%^$#@ */                                           \
     }                                                                   \
     UNREACHABLE();                                                      \
     return nullptr;                                                     \
   }
 CACHED_OP_LIST_WITH_LANGUAGE_MODE(CACHED_WITH_LANGUAGE_MODE)
 #undef CACHED_WITH_LANGUAGE_MODE
 
 
-const Operator* JSOperatorBuilder::CallFunction(
-    size_t arity, CallFunctionFlags flags, LanguageMode language_mode,
-    VectorSlotPair const& feedback) {
-  CallFunctionParameters parameters(arity, flags, language_mode, feedback);
+const Operator* JSOperatorBuilder::CallFunction(size_t arity,
+                                                CallFunctionFlags flags,
+                                                LanguageMode language_mode,
+                                                VectorSlotPair const& feedback,
+                                                TailCallMode tail_call_mode) {
+  CallFunctionParameters parameters(arity, flags, language_mode, feedback,
+                                    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) {
@@ skipping 178 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