Refactor emitting of deoptimization descriptors for calls.

runtime/vm/flow_graph_compiler.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/globals.h"  // Needed here to get TARGET_ARCH_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
@@ skipping 263 matching lines @@
   }
 
   ASSERT(block_order()[0]->IsGraphEntry());
   BlockInfo* block_info = block_info_[block_order()[0]->postorder_number()];
   block_info->set_next_nonempty_label(nonempty_label);
 }
 
 
 void FlowGraphCompiler::EmitInstructionPrologue(Instruction* instr) {
   if (!is_optimizing()) {
-    if (FLAG_enable_type_checks && instr->IsAssertAssignable()) {
-      AssertAssignableInstr* assert = instr->AsAssertAssignable();
-      AddCurrentDescriptor(RawPcDescriptors::kDeopt,
-                           assert->deopt_id(),
-                           assert->token_pos());
-    } else if (instr->CanBecomeDeoptimizationTarget() && !instr->IsGoto()) {
+    if (instr->CanBecomeDeoptimizationTarget() && !instr->IsGoto()) {
       // Instructions that can be deoptimization targets need to record kDeopt
       // PcDescriptor corresponding to their deopt id. GotoInstr records its
       // own so that it can control the placement.
       AddCurrentDescriptor(RawPcDescriptors::kDeopt,
                            instr->deopt_id(),
                            Scanner::kNoSourcePos);
     }
     AllocateRegistersLocally(instr);
   } else if (instr->MayThrow()  &&
              (CurrentTryIndex() != CatchClauseNode::kInvalidTryIndex)) {
@@ skipping 1175 matching lines @@
     threshold = FLAG_optimization_counter_scale * basic_blocks +
         FLAG_min_optimization_counter_threshold;
     if (threshold > FLAG_optimization_counter_threshold) {
       threshold = FLAG_optimization_counter_threshold;
     }
   }
   return threshold;
 }
 
 }  // namespace dart