VM: Add smi fast path operations for precompiled code

runtime/vm/raw_object.h

 // 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.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/atomic.h"
 #include "vm/globals.h"
@@ skipping 1236 matching lines @@
 // The bit map representation is optimized for dense and small bit maps, without
 // any upper bound.
 class RawStackmap : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Stackmap);
 
   // Regarding changing this to a bitfield: ARM64 requires register_bit_count_
   // to be as large as 96, meaning 7 bits, leaving 25 bits for the length, or
   // as large as ~33 million entries. If that is sufficient, then these two
   // fields can be merged into a BitField.
   int32_t length_;  // Length of payload, in bits.
-  int32_t register_bit_count_;  // Live register bits, included in length_.
+  int32_t slow_path_bit_count_;  // Slow path live values, included in length_.
 
   // Offset from code entry point corresponding to this stack map
   // representation.
   uint32_t pc_offset_;
 
   // Variable length data follows here (bitmap of the stack layout).
   uint8_t* data() { OPEN_ARRAY_START(uint8_t, uint8_t); }
   const uint8_t* data() const { OPEN_ARRAY_START(uint8_t, uint8_t); }
 
   friend class SnapshotReader;
@@ skipping 1087 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_