diff -r 4e2bff1a5467 -r b0c9cb06506b hotspot/src/share/vm/c1/c1_LinearScan.cpp
--- a/hotspot/src/share/vm/c1/c1_LinearScan.cpp	Mon May 02 12:14:26 2016 -0400
+++ b/hotspot/src/share/vm/c1/c1_LinearScan.cpp	Tue May 03 22:45:27 2016 +0200
@@ -88,7 +88,7 @@
  , _has_info(0)
  , _has_call(0)
  , _scope_value_cache(0) // initialized later with correct length
- , _interval_in_loop(0, 0) // initialized later with correct length
+ , _interval_in_loop(0)  // initialized later with correct length
  , _cached_blocks(*ir->linear_scan_order())
 #ifdef X86
  , _fpu_stack_allocator(NULL)
@@ -524,8 +524,8 @@
   assert(idx == num_instructions, "must match");
   assert(idx * 2 == op_id, "must match");
 
-  _has_call = BitMap(num_instructions); _has_call.clear();
-  _has_info = BitMap(num_instructions); _has_info.clear();
+  _has_call.initialize(num_instructions);
+  _has_info.initialize(num_instructions);
 }
 
 
@@ -568,8 +568,8 @@
   for (int i = 0; i < num_blocks; i++) {
     BlockBegin* block = block_at(i);
 
-    BitMap live_gen(live_size);  live_gen.clear();
-    BitMap live_kill(live_size); live_kill.clear();
+    ResourceBitMap live_gen(live_size);  live_gen.clear();
+    ResourceBitMap live_kill(live_size); live_kill.clear();
 
     if (block->is_set(BlockBegin::exception_entry_flag)) {
       // Phi functions at the begin of an exception handler are
@@ -715,8 +715,8 @@
 
     block->set_live_gen (live_gen);
     block->set_live_kill(live_kill);
-    block->set_live_in  (BitMap(live_size)); block->live_in().clear();
-    block->set_live_out (BitMap(live_size)); block->live_out().clear();
+    block->set_live_in  (ResourceBitMap(live_size)); block->live_in().clear();
+    block->set_live_out (ResourceBitMap(live_size)); block->live_out().clear();
 
     TRACE_LINEAR_SCAN(4, tty->print("live_gen  B%d ", block->block_id()); print_bitmap(block->live_gen()));
     TRACE_LINEAR_SCAN(4, tty->print("live_kill B%d ", block->block_id()); print_bitmap(block->live_kill()));
@@ -741,7 +741,7 @@
   bool change_occurred;
   bool change_occurred_in_block;
   int  iteration_count = 0;
-  BitMap live_out(live_set_size()); live_out.clear(); // scratch set for calculations
+  ResourceBitMap live_out(live_set_size()); live_out.clear(); // scratch set for calculations
 
   // Perform a backward dataflow analysis to compute live_out and live_in for each block.
   // The loop is executed until a fixpoint is reached (no changes in an iteration)
@@ -775,7 +775,7 @@
 
         if (!block->live_out().is_same(live_out)) {
           // A change occurred.  Swap the old and new live out sets to avoid copying.
-          BitMap temp = block->live_out();
+          ResourceBitMap temp = block->live_out();
           block->set_live_out(live_out);
           live_out = temp;
 
@@ -787,7 +787,7 @@
       if (iteration_count == 0 || change_occurred_in_block) {
         // live_in(block) is the union of live_gen(block) with (live_out(block) & !live_kill(block))
         // note: live_in has to be computed only in first iteration or if live_out has changed!
-        BitMap live_in = block->live_in();
+        ResourceBitMap live_in = block->live_in();
         live_in.set_from(block->live_out());
         live_in.set_difference(block->live_kill());
         live_in.set_union(block->live_gen());
@@ -826,7 +826,7 @@
 #endif
 
   // check that the live_in set of the first block is empty
-  BitMap live_in_args(ir()->start()->live_in().size());
+  ResourceBitMap live_in_args(ir()->start()->live_in().size());
   live_in_args.clear();
   if (!ir()->start()->live_in().is_same(live_in_args)) {
 #ifdef ASSERT
@@ -1317,7 +1317,7 @@
     assert(block_to   == instructions->at(instructions->length() - 1)->id(), "must be");
 
     // Update intervals for registers live at the end of this block;
-    BitMap live = block->live_out();
+    ResourceBitMap live = block->live_out();
     int size = (int)live.size();
     for (int number = (int)live.get_next_one_offset(0, size); number < size; number = (int)live.get_next_one_offset(number + 1, size)) {
       assert(live.at(number), "should not stop here otherwise");
@@ -1717,7 +1717,7 @@
 
   const int num_regs = num_virtual_regs();
   const int size = live_set_size();
-  const BitMap live_at_edge = to_block->live_in();
+  const ResourceBitMap live_at_edge = to_block->live_in();
 
   // visit all registers where the live_at_edge bit is set
   for (int r = (int)live_at_edge.get_next_one_offset(0, size); r < size; r = (int)live_at_edge.get_next_one_offset(r + 1, size)) {
@@ -1774,8 +1774,8 @@
 
   int num_blocks = block_count();
   MoveResolver move_resolver(this);
-  BitMap block_completed(num_blocks);  block_completed.clear();
-  BitMap already_resolved(num_blocks); already_resolved.clear();
+  ResourceBitMap block_completed(num_blocks);  block_completed.clear();
+  ResourceBitMap already_resolved(num_blocks); already_resolved.clear();
 
   int i;
   for (i = 0; i < num_blocks; i++) {
@@ -3397,7 +3397,7 @@
 
   for (int i = 0; i < num_blocks; i++) {
     BlockBegin* block = block_at(i);
-    BitMap live_at_edge = block->live_in();
+    ResourceBitMap live_at_edge = block->live_in();
 
     // visit all registers where the live_at_edge bit is set
     for (int r = (int)live_at_edge.get_next_one_offset(0, size); r < size; r = (int)live_at_edge.get_next_one_offset(r + 1, size)) {
@@ -3749,7 +3749,7 @@
   }
 
 
-  BitMap used_regs(LinearScan::nof_regs + allocator()->frame_map()->argcount() + allocator()->max_spills());
+  ResourceBitMap used_regs(LinearScan::nof_regs + allocator()->frame_map()->argcount() + allocator()->max_spills());
   used_regs.clear();
   if (!_multiple_reads_allowed) {
     for (i = 0; i < _mapping_from.length(); i++) {
@@ -6317,7 +6317,7 @@
 
 void ControlFlowOptimizer::delete_jumps_to_return(BlockList* code) {
 #ifdef ASSERT
-  BitMap return_converted(BlockBegin::number_of_blocks());
+  ResourceBitMap return_converted(BlockBegin::number_of_blocks());
   return_converted.clear();
 #endif