[turbofan] Avoid allocating rest parameters for spread calls.

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 39 matching lines @@
   DCHECK_EQ(IrOpcode::kJSConvertReceiver, op->opcode());
   return OpParameter<ConvertReceiverMode>(op);
 }
 
 
 ToBooleanHints ToBooleanHintsOf(Operator const* op) {
   DCHECK_EQ(IrOpcode::kJSToBoolean, op->opcode());
   return OpParameter<ToBooleanHints>(op);
 }
 
+std::ostream& operator<<(std::ostream& os,
+                         ConstructForwardVarargsParameters const& p) {
+  return os << p.arity() << ", " << p.start_index();
+}
+
+ConstructForwardVarargsParameters const& ConstructForwardVarargsParametersOf(
+    Operator const* op) {
+  DCHECK_EQ(IrOpcode::kJSConstructForwardVarargs, op->opcode());
+  return OpParameter<ConstructForwardVarargsParameters>(op);
+}
+
 bool operator==(ConstructParameters const& lhs,
                 ConstructParameters const& rhs) {
   return lhs.arity() == rhs.arity() && lhs.frequency() == rhs.frequency() &&
          lhs.feedback() == rhs.feedback();
 }
 
 bool operator!=(ConstructParameters const& lhs,
                 ConstructParameters const& rhs) {
   return !(lhs == rhs);
 }
@@ skipping 41 matching lines @@
   return os;
 }
 
 const CallParameters& CallParametersOf(const Operator* op) {
   DCHECK_EQ(IrOpcode::kJSCall, op->opcode());
   return OpParameter<CallParameters>(op);
 }
 
 std::ostream& operator<<(std::ostream& os,
                          CallForwardVarargsParameters const& p) {
-  return os << p.start_index() << ", " << p.tail_call_mode();
+  return os << p.arity() << ", " << p.start_index() << ", "
+            << p.tail_call_mode();
 }
 
 CallForwardVarargsParameters const& CallForwardVarargsParametersOf(
     Operator const* op) {
   DCHECK_EQ(IrOpcode::kJSCallForwardVarargs, op->opcode());
   return OpParameter<CallForwardVarargsParameters>(op);
 }
 
 
 bool operator==(CallRuntimeParameters const& lhs,
@@ skipping 604 matching lines @@
 const Operator* JSOperatorBuilder::ToBoolean(ToBooleanHints hints) {
   // TODO(turbofan): Cache most important versions of this operator.
   return new (zone()) Operator1<ToBooleanHints>(  //--
       IrOpcode::kJSToBoolean, Operator::kPure,    // opcode
       "JSToBoolean",                              // name
       1, 0, 0, 1, 0, 0,                           // inputs/outputs
       hints);                                     // parameter
 }
 
 const Operator* JSOperatorBuilder::CallForwardVarargs(
-    uint32_t start_index, TailCallMode tail_call_mode) {
-  CallForwardVarargsParameters parameters(start_index, tail_call_mode);
+    size_t arity, uint32_t start_index, TailCallMode tail_call_mode) {
+  CallForwardVarargsParameters parameters(arity, start_index, tail_call_mode);
   return new (zone()) Operator1<CallForwardVarargsParameters>(   // --
       IrOpcode::kJSCallForwardVarargs, Operator::kNoProperties,  // opcode
       "JSCallForwardVarargs",                                    // name
-      2, 1, 1, 1, 1, 2,                                          // counts
+      parameters.arity(), 1, 1, 1, 1, 2,                         // counts
       parameters);                                               // parameter
 }
 
 const Operator* JSOperatorBuilder::Call(size_t arity, CallFrequency frequency,
                                         VectorSlotPair const& feedback,
                                         ConvertReceiverMode convert_mode,
                                         TailCallMode tail_call_mode) {
   CallParameters parameters(arity, frequency, feedback, tail_call_mode,
                             convert_mode);
   return new (zone()) Operator1<CallParameters>(   // --
@@ skipping 29 matching lines @@
                                                size_t arity) {
   CallRuntimeParameters parameters(f->function_id, arity);
   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
 }
 
+const Operator* JSOperatorBuilder::ConstructForwardVarargs(
+    size_t arity, uint32_t start_index) {
+  ConstructForwardVarargsParameters parameters(arity, start_index);
+  return new (zone()) Operator1<ConstructForwardVarargsParameters>(   // --
+      IrOpcode::kJSConstructForwardVarargs, Operator::kNoProperties,  // opcode
+      "JSConstructForwardVarargs",                                    // name
+      parameters.arity(), 1, 1, 1, 1, 2,                              // counts
+      parameters);  // parameter
+}
+
 const Operator* JSOperatorBuilder::Construct(uint32_t arity,
                                              CallFrequency frequency,
                                              VectorSlotPair const& feedback) {
   ConstructParameters parameters(arity, frequency, feedback);
   return new (zone()) Operator1<ConstructParameters>(   // --
       IrOpcode::kJSConstruct, Operator::kNoProperties,  // opcode
       "JSConstruct",                                    // name
       parameters.arity(), 1, 1, 1, 1, 2,                // counts
       parameters);                                      // parameter
 }
@@ skipping 275 matching lines @@
   return new (zone()) Operator1<Handle<ScopeInfo>>(               // --
       IrOpcode::kJSCreateScriptContext, Operator::kNoProperties,  // opcode
       "JSCreateScriptContext",                                    // name
       1, 1, 1, 1, 1, 2,                                           // counts
       scope_info);                                                // parameter
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8