[turbofan] Run everything after representation selection concurrently.

src/compiler/linkage.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/ast/scopes.h"
 #include "src/code-stubs.h"
 #include "src/compiler.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/frame.h"
 #include "src/compiler/linkage.h"
@@ skipping 386 matching lines @@
       locations.Build(),                // location_sig
       stack_parameter_count,            // stack_parameter_count
       properties,                       // properties
       kNoCalleeSaved,                   // callee-saved registers
       kNoCalleeSaved,                   // callee-saved fp
       CallDescriptor::kCanUseRoots |    // flags
           flags,                        // flags
       descriptor.DebugName(isolate));
 }
 
+// static
+CallDescriptor* Linkage::GetAllocateCallDescriptor(Zone* zone) {
+  LocationSignature::Builder locations(zone, 1, 1);
+  MachineSignature::Builder types(zone, 1, 1);
+
+  locations.AddParam(regloc(kAllocateSizeRegister));
+  types.AddParam(MachineType::Int32());
+
+  locations.AddReturn(regloc(kReturnRegister0));
+  types.AddReturn(MachineType::AnyTagged());
+
+  // The target for allocate calls is a code object.
+  MachineType target_type = MachineType::AnyTagged();
+  LinkageLocation target_loc = LinkageLocation::ForAnyRegister();
+  return new (zone) CallDescriptor(     // --
+      CallDescriptor::kCallCodeObject,  // kind
+      target_type,                      // target MachineType
+      target_loc,                       // target location
+      types.Build(),                    // machine_sig
+      locations.Build(),                // location_sig
+      0,                                // stack_parameter_count
+      Operator::kNoThrow,               // properties
+      kNoCalleeSaved,                   // callee-saved registers
+      kNoCalleeSaved,                   // callee-saved fp
+      CallDescriptor::kCanUseRoots,     // flags
+      "Allocate");
+}
+
+// static
 CallDescriptor* Linkage::GetBytecodeDispatchCallDescriptor(
     Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor,
     int stack_parameter_count) {
   const int register_parameter_count = descriptor.GetRegisterParameterCount();
   const int parameter_count = register_parameter_count + stack_parameter_count;
 
   LocationSignature::Builder locations(zone, 0, parameter_count);
   MachineSignature::Builder types(zone, 0, parameter_count);
 
   // Add parameters in registers and on the stack.
@@ skipping 71 matching lines @@
   } else {
     DCHECK(loc == regloc(kContextRegister));
     return LinkageLocation::ForCalleeFrameSlot(Frame::kContextSlot);
   }
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8