Generate some intrinsics using our IR.

runtime/vm/flow_graph_allocator.h

 // Copyright (c) 2013, 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_FLOW_GRAPH_ALLOCATOR_H_
 #define VM_FLOW_GRAPH_ALLOCATOR_H_
 
 #include "vm/flow_graph.h"
 #include "vm/growable_array.h"
 #include "vm/intermediate_language.h"
@@ skipping 38 matching lines @@
 
   GraphEntryInstr* graph_entry_;
 };
 
 
 class FlowGraphAllocator : public ValueObject {
  public:
   // Number of stack slots needed for a fpu register spill slot.
   static const intptr_t kDoubleSpillFactor = kDoubleSize / kWordSize;
 
-  explicit FlowGraphAllocator(const FlowGraph& flow_graph);
+  explicit FlowGraphAllocator(const FlowGraph& flow_graph,
+                              bool intrinsics_mode = false);
 
   void AllocateRegisters();
 
   // Map a virtual register number to its live range.
   LiveRange* GetLiveRange(intptr_t vreg);
 
  private:
   void CollectRepresentations();
 
   // Visit blocks in the code generation order (reverse post order) and
@@ skipping 247 matching lines @@
   // are disjoint.
   GrowableArray<bool> quad_spill_slots_;
 
   // Track whether a spill slot is expected to hold a tagged or untagged value.
   // This is used to keep tagged and untagged spill slots disjoint. See bug
   // #18955 for details.
   GrowableArray<bool> untagged_spill_slots_;
 
   intptr_t cpu_spill_slot_count_;
 
+  bool intrinsic_mode_;
+
   DISALLOW_COPY_AND_ASSIGN(FlowGraphAllocator);
 };
 
 
 // Additional information about a block that is not contained in a
 // block entry.
 class BlockInfo : public ZoneAllocated {
  public:
   explicit BlockInfo(BlockEntryInstr* entry)
     : entry_(entry),
@@ skipping 332 matching lines @@
 
   AllocationFinger finger_;
 
   DISALLOW_COPY_AND_ASSIGN(LiveRange);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_ALLOCATOR_H_