Put live register bits in stackmaps.

runtime/vm/object.cc

 // 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.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
@@ skipping 6771 matching lines @@
   uint8_t byte_mask = 1U << bit_remainder;
   uint8_t* byte_addr = &(raw_ptr()->data_[byte_index]);
   if (value) {
     *byte_addr |= byte_mask;
   } else {
     *byte_addr &= ~byte_mask;
   }
 }
 
 
-RawStackmap* Stackmap::New(intptr_t pc_offset, BitmapBuilder* bmap) {
+RawStackmap* Stackmap::New(intptr_t pc_offset,
+                           BitmapBuilder* bmap,
+                           intptr_t register_bit_count) {
   ASSERT(Object::stackmap_class() != Class::null());
   ASSERT(bmap != NULL);
   Stackmap& result = Stackmap::Handle();
   // Guard against integer overflow of the instance size computation.
   intptr_t length = bmap->Length();
   intptr_t payload_size =
       Utils::RoundUp(length, kBitsPerByte) / kBitsPerByte;
   if ((payload_size < 0) ||
       (payload_size >
            (kSmiMax - static_cast<intptr_t>(sizeof(RawStackmap))))) {
@@ skipping 12 matching lines @@
     result.SetLength(length);
   }
   // When constructing a stackmap we store the pc offset in the stackmap's
   // PC. StackmapTableBuilder::FinalizeStackmaps will replace it with the pc
   // address.
   ASSERT(pc_offset >= 0);
   result.SetPC(pc_offset);
   for (intptr_t i = 0; i < length; ++i) {
     result.SetBit(i, bmap->Get(i));
   }
+  result.SetRegisterBitCount(register_bit_count);
   return result.raw();
 }
 
 
 const char* Stackmap::ToCString() const {
   if (IsNull()) {
     return "{null}";
   } else {
     const char* kFormat = "0x%" PRIxPTR ": ";
     intptr_t fixed_length = OS::SNPrint(NULL, 0, kFormat, PC()) + 1;
@@ skipping 4345 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart