dfg/DFGOSRAvailabilityAnalysisPhase.h

   1 /*
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  25
  26 #ifndef DFGOSRAvailabilityAnalysisPhase_h
  27 #define DFGOSRAvailabilityAnalysisPhase_h
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include "DFGBasicBlock.h"
  32 #include "DFGCommon.h"
  33
  34 namespace JSC { namespace DFG {
  35
  36 class Graph;
  37
  38 // Computes BasicBlock::ssa->availabiltiyAtHead/Tail. This is a forward flow type inference
  39 // over MovHints and SetLocals. This analysis is run directly by the Plan for preparing for
  40 // lowering to LLVM IR, but it can also be used as a utility. Note that if you run it before
  41 // stack layout, all of the flush availability will omit the virtual register - but it will
  42 // tell you the format.
  43
  44 bool performOSRAvailabilityAnalysis(Graph&);
  45
  46 // Local calculator for figuring out the availability at any node in a basic block. Requires
  47 // having run the availability analysis.
  48 class LocalOSRAvailabilityCalculator {
  49 public:
  50     LocalOSRAvailabilityCalculator();
  51     ~LocalOSRAvailabilityCalculator();
  52
  53     void beginBlock(BasicBlock*);
  54     void endBlock(BasicBlock*); // Useful if you want to get data for the end of the block. You don't need to call this if you did beginBlock() and then executeNode() for every node.
  55     void executeNode(Node*);
  56
  57     AvailabilityMap m_availability;
  58 };
  59
  60 } } // namespace JSC::DFG
  61
  62 #endif // ENABLE(DFG_JIT)
  63
  64 #endif // DFGOSRAvailabilityAnalysisPhase_h
  65