ARM64: Avoid iterating through all unresolved branch infos when many are pending.

src/arm64/instructions-arm64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 174 matching lines @@
   }
 
   bool IsCompareBranch() const {
     return Mask(CompareBranchFMask) == CompareBranchFixed;
   }
 
   bool IsTestBranch() const {
     return Mask(TestBranchFMask) == TestBranchFixed;
   }
 
+  bool IsImmBranch() const {
+    return BranchType() != UnknownBranchType;
+  }
+
   bool IsLdrLiteral() const {
     return Mask(LoadLiteralFMask) == LoadLiteralFixed;
   }
 
   bool IsLdrLiteralX() const {
     return Mask(LoadLiteralMask) == LDR_x_lit;
   }
 
   bool IsPCRelAddressing() const {
     return Mask(PCRelAddressingFMask) == PCRelAddressingFixed;
@@ skipping 300 matching lines @@
   TRACE_ENABLE   = 1 << 6,
   TRACE_DISABLE  = 2 << 6,
   TRACE_OVERRIDE = 3 << 6
 };
 
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_ARM64_INSTRUCTIONS_ARM64_H_