Merge TRUNCDIV and MOD into one instruction. Icorporated feedback from CL https://codereview.chromi…

runtime/vm/compiler.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/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 318 matching lines @@
       // potentially affect optimizations.
       if (optimized) {
         TimerScope timer(FLAG_compiler_stats,
                          &CompilerStats::graphoptimizer_timer,
                          isolate);
 
         FlowGraphOptimizer optimizer(flow_graph);
         optimizer.ApplyICData();
         DEBUG_ASSERT(flow_graph->VerifyUseLists());
 
-        // Optimize (a << b) & c patterns. Must occur before
+        // Optimize (a << b) & c patterns, merge operations. Must occur before
         // 'SelectRepresentations' which inserts conversion nodes.
         // TODO(srdjan): Moved before inlining until environment use list can
         // be used to detect when shift-left is outside the scope of bit-and.
-        optimizer.TryOptimizeLeftShiftWithBitAndPattern();
+        optimizer.TryOptimizePatterns();
         DEBUG_ASSERT(flow_graph->VerifyUseLists());
 
         // Inlining (mutates the flow graph)
         if (FLAG_use_inlining) {
           TimerScope timer(FLAG_compiler_stats,
                            &CompilerStats::graphinliner_timer);
           // Propagate types to create more inlining opportunities.
           FlowGraphTypePropagator::Propagate(flow_graph);
           DEBUG_ASSERT(flow_graph->VerifyUseLists());
 
@@ skipping 574 matching lines @@
       Object::Handle(isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     isolate->set_long_jump_base(base);
     return result.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 }  // namespace dart