[turbofan] Handle void returns in instruction selector.

src/compiler/instruction-selector.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/instruction-selector.h"
 
 #include <limits>
 
 #include "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
@@ skipping 982 matching lines @@
 void InstructionSelector::VisitGoto(BasicBlock* target) {
   // jump to the next block.
   OperandGenerator g(this);
   Emit(kArchJmp, g.NoOutput(), g.Label(target));
 }
 
 
 void InstructionSelector::VisitReturn(Node* value) {
   DCHECK_NOT_NULL(value);
   OperandGenerator g(this);
-  Emit(kArchRet, g.NoOutput(),
-       g.UseLocation(value, linkage()->GetReturnLocation(),
-                     linkage()->GetReturnType()));
+  if (linkage()->GetIncomingDescriptor()->ReturnCount() == 0) {
+    Emit(kArchRet, g.NoOutput());
+  } else {
+    Emit(kArchRet, g.NoOutput(),
+         g.UseLocation(value, linkage()->GetReturnLocation(),
+                       linkage()->GetReturnType()));
+  }
 }
 
 
 void InstructionSelector::VisitDeoptimize(Node* value) {
   OperandGenerator g(this);
 
   FrameStateDescriptor* desc = GetFrameStateDescriptor(value);
   size_t arg_count = desc->GetTotalSize() + 1;  // Include deopt id.
 
   InstructionOperandVector args(instruction_zone());
@@ skipping 139 matching lines @@
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   return MachineOperatorBuilder::Flag::kNoFlags;
 }
 
 #endif  // !V8_TURBOFAN_BACKEND
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8