DBC: Adds simdbc64 target, adds arm64 arithmetic overflow logic

runtime/tests/vm/vm.status

 # Copyright (c) 2012, 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.
 
 # These tests are expected to crash on all platforms.
 cc/ArrayNew_Overflow_Crash: Crash, Timeout
 cc/AllocGeneric_Overflow: Crash, Timeout
 cc/CodeImmutability: Crash
 
 cc/SNPrint_BadArgs: Skip
@@ skipping 15 matching lines @@
 
 # The following section refers to the dart vm tests which live under
 # runtime/tests/vm/dart.
 [ $system == windows ]
 cc/Dart2JSCompileAll: Skip
 cc/ExternalizeConstantStrings: Skip
 cc/Service_Profile: Skip
 cc/Dart2JSCompilerStats: Skip
 cc/CorelibCompilerStats: Skip
 
-[ $arch == simarm || $arch == simarmv6 || $arch == simarmv5te || $arch == simarm64 || $arch == simmips || $arch == simdbc  ]
+[ $arch == simarm || $arch == simarmv6 || $arch == simarmv5te || $arch == simarm64 || $arch == simmips || $arch == simdbc  || $arch == simdbc64 ]
 cc/Service_Profile: Skip
 
 [ $compiler == dart2js ]
 dart/redirection_type_shuffling_test: Skip # Depends on lazy enforcement of type bounds
 dart/byte_array_test: Skip # compilers not aware of byte arrays
 dart/byte_array_optimized_test: Skip # compilers not aware of byte arrays
 dart/simd128float32_array_test: Skip # compilers not aware of Simd128
 dart/simd128float32_test: Skip # compilers not aware of Simd128
 
 [ $compiler == dart2js ]
@@ skipping 44 matching lines @@
 
 [ $runtime == dart_product || $runtime == dart_precompiled ]
 dart/data_uri_spawn_test: SkipByDesign # Isolate.spawnUri
 dart/optimized_stacktrace_test: SkipByDesign # Requires line numbers
 
 [ $runtime == vm && $mode == product ]
 cc/IsolateSetCheckedMode: Fail,OK  # Expects exact type name.
 cc/LibraryGetClassNames: Fail,OK  # Expects exact type name.
 cc/StackTraceFormat: Fail,OK  # Expects exact type name.
 
-[ $arch == simdbc ]
+[ $arch == simdbc || $arch == simdbc64 ]
 # TODO(vegorov) Profiler is completely disabled in SIMDBC builds.
 cc/Profiler_AllocationSampleTest: Skip
 cc/Profiler_ArrayAllocation: Skip
 cc/Profiler_BasicSourcePosition: Skip
 cc/Profiler_BasicSourcePositionOptimized: Skip
 cc/Profiler_BinaryOperatorSourcePosition: Skip
 cc/Profiler_BinaryOperatorSourcePositionOptimized: Skip
 cc/Profiler_ChainedSamples: Skip
 cc/Profiler_ClosureAllocation: Skip
 cc/Profiler_CodeTicks: Skip
@@ skipping 62 matching lines @@
 # large page. However large enough function overflows bytecode encoding.
 cc/FindCodeObject: Skip
 
 # This test is meaningless for DBC as allocation stubs are not used.
 cc/RegenerateAllocStubs: Skip
 
 # TODO(vegorov) Enable when DBC supports optimizing compiler.
 cc/Debug_InspectStack_Optimized: Skip
 cc/Debug_InspectStackWithClosure_Optimized: Skip