Make helper functions static to avoid accidental collision and potentially aid optimization.

runtime/vm/intrinsifier_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM64.
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 1956 matching lines @@
   TryAllocateOnebyteString(assembler, &ok, &fall_through);
 
   __ Bind(&ok);
   __ ret();
 
   __ Bind(&fall_through);
 }
 
 
 // TODO(srdjan): Add combinations (one-byte/two-byte/external strings).
-void StringEquality(Assembler* assembler, intptr_t string_cid) {
+static void StringEquality(Assembler* assembler, intptr_t string_cid) {
   Label fall_through, is_true, is_false, loop;
   __ ldr(R0, Address(SP, 1 * kWordSize));  // This.
   __ ldr(R1, Address(SP, 0 * kWordSize));  // Other.
 
   // Are identical?
   __ cmp(R0, Operand(R1));
   __ b(&is_true, EQ);
 
   // Is other OneByteString?
   __ tsti(R1, Immediate(kSmiTagMask));
@@ skipping 129 matching lines @@
   Isolate* isolate = Isolate::Current();
   __ LoadImmediate(R1, reinterpret_cast<uword>(isolate), kNoPP);
   // Set return value to Isolate::current_tag_.
   __ ldr(R0, Address(R1, Isolate::current_tag_offset()));
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64