[turbofan] Move platform-independent bits of VisitTailCall to instruction-selector.cc

src/compiler/x64/instruction-selector-x64.cc

Index: src/compiler/x64/instruction-selector-x64.cc
diff --git a/src/compiler/x64/instruction-selector-x64.cc b/src/compiler/x64/instruction-selector-x64.cc
index 7597df4928823dd31f6aabb66d01ef01f9b13f9f..d2b5f7685ae3b4c67a25ea0677ad046ca9edd649 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -1111,83 +1111,7 @@ void InstructionSelector::EmitPrepareArguments(NodeVector* arguments,
 }
 
 
-void InstructionSelector::VisitTailCall(Node* node) {
-  X64OperandGenerator g(this);
-  CallDescriptor const* descriptor = OpParameter<CallDescriptor const*>(node);
-  DCHECK_NE(0, descriptor->flags() & CallDescriptor::kSupportsTailCalls);
-  DCHECK_EQ(0, descriptor->flags() & CallDescriptor::kPatchableCallSite);
-  DCHECK_EQ(0, descriptor->flags() & CallDescriptor::kNeedsNopAfterCall);
-
-  // TODO(turbofan): Relax restriction for stack parameters.
-  if (linkage()->GetIncomingDescriptor()->CanTailCall(node)) {
-    CallBuffer buffer(zone(), descriptor, nullptr);
-
-    // Compute InstructionOperands for inputs and outputs.
-    InitializeCallBuffer(node, &buffer, true, true);
-
-    // Select the appropriate opcode based on the call type.
-    InstructionCode opcode;
-    switch (descriptor->kind()) {
-      case CallDescriptor::kCallCodeObject:
-        opcode = kArchTailCallCodeObject;
-        break;
-      case CallDescriptor::kCallJSFunction:
-        opcode = kArchTailCallJSFunction;
-        break;
-      default:
-        UNREACHABLE();
-        return;
-    }
-    opcode |= MiscField::encode(descriptor->flags());
-
-    // Emit the tailcall instruction.
-    Emit(opcode, 0, nullptr, buffer.instruction_args.size(),
-         &buffer.instruction_args.front());
-  } else {
-    FrameStateDescriptor* frame_state_descriptor =
-        descriptor->NeedsFrameState()
-            ? GetFrameStateDescriptor(
-                  node->InputAt(static_cast<int>(descriptor->InputCount())))
-            : nullptr;
-
-    CallBuffer buffer(zone(), descriptor, frame_state_descriptor);
-
-    // Compute InstructionOperands for inputs and outputs.
-    InitializeCallBuffer(node, &buffer, true, true);
-
-    // Push any stack arguments.
-    for (Node* input : base::Reversed(buffer.pushed_nodes)) {
-      // TODO(titzer): Handle pushing double parameters.
-      InstructionOperand value =
-          g.CanBeImmediate(input)
-              ? g.UseImmediate(input)
-              : IsSupported(ATOM) ? g.UseRegister(input) : g.Use(input);
-      Emit(kX64Push, g.NoOutput(), value);
-    }
-
-    // Select the appropriate opcode based on the call type.
-    InstructionCode opcode;
-    switch (descriptor->kind()) {
-      case CallDescriptor::kCallCodeObject:
-        opcode = kArchCallCodeObject;
-        break;
-      case CallDescriptor::kCallJSFunction:
-        opcode = kArchCallJSFunction;
-        break;
-      default:
-        UNREACHABLE();
-        return;
-    }
-    opcode |= MiscField::encode(descriptor->flags());
-
-    // Emit the call instruction.
-    size_t output_count = buffer.outputs.size();
-    auto* outputs = &buffer.outputs.front();
-    Emit(opcode, output_count, outputs, buffer.instruction_args.size(),
-         &buffer.instruction_args.front())->MarkAsCall();
-    Emit(kArchRet, 0, nullptr, output_count, outputs);
-  }
-}
+bool InstructionSelector::IsTailCallAddressImmediate() { return true; }
 
 
 namespace {