collect_hardware_constrained_fields.h

 
#ifndef BF_P4C_ARCH_COLLECT_HARDWARE_CONSTRAINED_FIELDS_H_
#define BF_P4C_ARCH_COLLECT_HARDWARE_CONSTRAINED_FIELDS_H_
 
#include "backends/tofino/bf-p4c/common/ir_utils.h"
#include "backends/tofino/bf-p4c/common/pragma/all_pragmas.h"
#include "backends/tofino/bf-p4c/phv/phv_fields.h"
#include "ir/ir.h"
#include "lib/cstring.h"
#include "lib/ordered_map.h"
#include "lib/ordered_set.h"
 
namespace BFN {
 
// This class add hardware constrained fields to pipe->thread[gress].hw_constrained_fields. This is
// a honeypot for Alias pass, so that Alias pass can replace hardware constrained fields' Member
// with AliasMember or AliasSlice. And this part of information can be used in CollectPhvInfo and
// DisableAutoInitMetadata to set Field's properties properly for alias fields for hardware
// constrained fields.
 
class AddHardwareConstrainedFields : public Modifier {
 public:
    void postorder(IR::BFN::Pipe *) override;
};
 
class CollectHardwareConstrainedFields : public PassManager {
 public:
    CollectHardwareConstrainedFields() { addPasses({new AddHardwareConstrainedFields()}); }
};
 
}  // namespace BFN
 
#endif /* BF_P4C_ARCH_COLLECT_HARDWARE_CONSTRAINED_FIELDS_H_ */