VM: Store edge counters in one per-function array.

runtime/vm/intermediate_language.cc

 // 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.
 
 #include "vm/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/constant_propagator.h"
 #include "vm/cpu.h"
 #include "vm/dart_entry.h"
@@ skipping 956 matching lines @@
 
   // 5. Iterate straight-line successors to record assigned variables and
   // find the last instruction in the block.  The graph entry block consists
   // of only the entry instruction, so that is the last instruction in the
   // block.
   Instruction* last = this;
   for (ForwardInstructionIterator it(this); !it.Done(); it.Advance()) {
     last = it.Current();
   }
   set_last_instruction(last);
+  if (last->IsGoto()) last->AsGoto()->set_block(this);
 
   return true;
 }
 
 
 bool BlockEntryInstr::PruneUnreachable(FlowGraphBuilder* builder,
                                        GraphEntryInstr* graph_entry,
                                        Instruction* parent,
                                        intptr_t osr_id,
                                        BitVector* block_marks) {
@@ skipping 1731 matching lines @@
                                                        bool optimizing) const {
   UNREACHABLE();
   return NULL;
 }
 
 
 void TargetEntryInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   __ Bind(compiler->GetJumpLabel(this));
   if (!compiler->is_optimizing()) {
     if (compiler->NeedsEdgeCounter(this)) {
-      compiler->EmitEdgeCounter();
+      compiler->EmitEdgeCounter(preorder_number());
     }
     // The deoptimization descriptor points after the edge counter code for
     // uniformity with ARM and MIPS, where we can reuse pattern matching
     // code that matches backwards from the end of the pattern.
     compiler->AddCurrentDescriptor(RawPcDescriptors::kDeopt,
                                    GetDeoptId(),
                                    Scanner::kNoSourcePos);
   }
   if (HasParallelMove()) {
     compiler->parallel_move_resolver()->EmitNativeCode(parallel_move());
@@ skipping 905 matching lines @@
     case Token::kTRUNCDIV: return 0;
     case Token::kMOD: return 1;
     default: UNIMPLEMENTED(); return -1;
   }
 }
 
 
 #undef __
 
 }  // namespace dart