Extend TF test coverage to unsupported targets.

src/compiler/arm64/instruction-selector-arm64.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-impl.h"
 #include "src/compiler/node-matchers.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
+#if V8_TURBOFAN_TARGET
+
 enum ImmediateMode {
   kArithimeticImm,  // 12 bit unsigned immediate shifted left 0 or 12 bits
   kShift32Imm,      // 0 - 31
   kShift64Imm,      // 0 -63
   kLogical32Imm,
   kLogical64Imm,
   kLoadStoreImm,  // unsigned 9 bit or signed 7 bit
   kNoImmediate
 };
 
@@ skipping 629 matching lines @@
     call_instr->MarkAsControl();
   }
 
   // Caller clean up of stack for C-style calls.
   if (is_c_frame && aligned_push_count > 0) {
     ASSERT(deoptimization == NULL && continuation == NULL);
     Emit(kArm64Drop | MiscField::encode(aligned_push_count), NULL);
   }
 }
 
+#endif  // V8_TURBOFAN_TARGET
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8