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

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

Index: src/compiler/ppc/instruction-selector-ppc.cc
diff --git a/src/compiler/ppc/instruction-selector-ppc.cc b/src/compiler/ppc/instruction-selector-ppc.cc
index 58e4cd98ac03cd62f84b590367c4e0a20a1eb739..03824042a3378f0a9581e025f78b3adb082496c5 100644
--- a/src/compiler/ppc/instruction-selector-ppc.cc
+++ b/src/compiler/ppc/instruction-selector-ppc.cc
@@ -1521,94 +1521,7 @@ void InstructionSelector::EmitPrepareArguments(NodeVector* arguments,
 }
 
 
-void InstructionSelector::VisitTailCall(Node* node) {
-  PPCOperandGenerator 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.
-    // TODO(turbofan): on PPC it's probably better to use the code object in a
-    // register if there are multiple uses of it. Improve constant pool and the
-    // heuristics in the register allocator for where to emit constants.
-    InitializeCallBuffer(node, &buffer, true, false);
-
-    // 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 = nullptr;
-    if (descriptor->NeedsFrameState()) {
-      frame_state_descriptor =
-          GetFrameStateDescriptor(node->InputAt(descriptor->InputCount()));
-    }
-
-    CallBuffer buffer(zone(), descriptor, frame_state_descriptor);
-
-    // Compute InstructionOperands for inputs and outputs.
-    // TODO(turbofan): on PPC it's probably better to use the code object in a
-    // register if there are multiple uses of it. Improve constant pool and the
-    // heuristics in the register allocator for where to emit constants.
-    InitializeCallBuffer(node, &buffer, true, false);
-
-    // Push any stack arguments.
-    int num_slots = static_cast<int>(descriptor->StackParameterCount());
-    int slot = 0;
-    for (Node* input : buffer.pushed_nodes) {
-      if (slot == 0) {
-        Emit(kPPC_PushFrame, g.NoOutput(), g.UseRegister(input),
-             g.TempImmediate(num_slots));
-      } else {
-        Emit(kPPC_StoreToStackSlot, g.NoOutput(), g.UseRegister(input),
-             g.TempImmediate(slot));
-      }
-      ++slot;
-    }
-
-    // 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 const output_count = buffer.outputs.size();
-    auto* outputs = output_count ? &buffer.outputs.front() : nullptr;
-    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 false; }
 
 
 void InstructionSelector::VisitFloat64ExtractLowWord32(Node* node) {