dart::SSACompactor Class Reference

Inheritance diagram for dart::SSACompactor:

Public Member Functions
	SSACompactor (intptr_t num_blocks, intptr_t num_ssa_vars, ZoneGrowableArray< Definition * > *detached_defs)
void	RenumberGraph (FlowGraph *graph)
Public Member Functions inherited from dart::ValueObject
	ValueObject ()
	~ValueObject ()

Detailed Description

Definition at line 3248 of file flow_graph.cc.

Constructor & Destructor Documentation

SSACompactor()

dart::SSACompactor::SSACompactor ( intptr_t  num_blocks, intptr_t  num_ssa_vars, ZoneGrowableArray< Definition * > *  detached_defs  )

inline

Definition at line 3250 of file flow_graph.cc.

      : block_num_(num_blocks),
        ssa_num_(num_ssa_vars),
        detached_defs_(detached_defs) {
    block_num_.EnsureLength(num_blocks, -1);
    ssa_num_.EnsureLength(num_ssa_vars, -1);
  }

Member Function Documentation

RenumberGraph()

void dart::SSACompactor::RenumberGraph ( FlowGraph *  graph )

inline

Definition at line 3260 of file flow_graph.cc.

                                       {
    for (auto block : graph->reverse_postorder()) {
      block_num_[block->block_id()] = 1;
      CollectDetachedMaterializations(block->env());
 
      if (auto* block_with_idefs = block->AsBlockEntryWithInitialDefs()) {
        for (Definition* def : *block_with_idefs->initial_definitions()) {
          RenumberDefinition(def);
          CollectDetachedMaterializations(def->env());
        }
      }
      if (auto* join = block->AsJoinEntry()) {
        for (PhiIterator it(join); !it.Done(); it.Advance()) {
          RenumberDefinition(it.Current());
        }
      }
      for (ForwardInstructionIterator it(block); !it.Done(); it.Advance()) {
        Instruction* instr = it.Current();
        if (Definition* def = instr->AsDefinition()) {
          RenumberDefinition(def);
        }
        CollectDetachedMaterializations(instr->env());
      }
    }
    for (auto* def : (*detached_defs_)) {
      RenumberDefinition(def);
    }
    graph->set_current_ssa_temp_index(current_ssa_index_);
 
    // Preserve order between block ids to as predecessors are sorted
    // by block ids.
    intptr_t current_block_index = 0;
    for (intptr_t i = 0, n = block_num_.length(); i < n; ++i) {
      if (block_num_[i] >= 0) {
        block_num_[i] = current_block_index++;
      }
    }
    for (auto block : graph->reverse_postorder()) {
      block->set_block_id(block_num_[block->block_id()]);
    }
    graph->set_max_block_id(current_block_index - 1);
  }

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The documentation for this class was generated from the following file:

• third_party/dart-lang/sdk/runtime/vm/compiler/backend/flow_graph.cc