live_range_report.h

 
#ifndef BF_P4C_PHV_UTILS_LIVE_RANGE_REPORT_H_
#define BF_P4C_PHV_UTILS_LIVE_RANGE_REPORT_H_
 
#include "backends/tofino/bf-p4c/common/field_defuse.h"
#include "backends/tofino/bf-p4c/mau/table_summary.h"
#include "backends/tofino/bf-p4c/phv/phv.h"
#include "backends/tofino/bf-p4c/phv/phv_fields.h"
#include "ir/ir.h"
#include "lib/log.h"
 
class LiveRangeReport : public Inspector {
 private:
    static constexpr unsigned READ = PHV::FieldUse::READ;
    static constexpr unsigned WRITE = PHV::FieldUse::WRITE;
    static constexpr unsigned LIVE = PHV::FieldUse::LIVE;
 
    const PhvInfo &phv;
    const TableSummary &alloc;
    const FieldDefUse &defuse;
 
    std::map<int, int> stageToReadBits;
    std::map<int, int> stageToWriteBits;
    std::map<int, int> stageToAccessBits;
    std::map<int, int> stageToLiveBits;
 
    int maxStages = -1;
 
    typedef ordered_map<const PHV::Field *, std::map<int, PHV::FieldUse>> LiveMap;
    LiveMap livemap;
 
    std::map<const PHV::Field *, const PHV::Field *> aliases;
 
    profile_t init_apply(const IR::Node *root) override;
 
    std::map<int, PHV::FieldUse> processUseDefSet(const FieldDefUse::LocPairSet &defuseSet,
                                                  PHV::FieldUse useDef) const;
 
    void setFieldLiveMap(const PHV::Field *f);
 
    std::vector<std::string> createStatRow(std::string title, const std::map<int, int> &data) const;
 
    cstring printFieldLiveness();
    cstring printBitStats() const;
    cstring printAliases() const;
 
 public:
    explicit LiveRangeReport(const PhvInfo &p, const TableSummary &t, const FieldDefUse &d)
        : phv(p), alloc(t), defuse(d) {}
 
    const LiveMap &get_livemap() const { return livemap; }
    int get_max_stages() const { return maxStages; }
};
 
#endif /*  BF_P4C_PHV_UTILS_LIVE_RANGE_REPORT_H_  */