nestingDepthMetric.h

/*
Determines the maximum nesting depth of the compiled program,
and of every major abstraction (controls, parsers, functions),
by increasing/decreasing a counter when entering/exiting block
statements, select statements and parser states.
*/
 
#ifndef FRONTENDS_P4_METRICS_NESTINGDEPTHMETRIC_H_
#define FRONTENDS_P4_METRICS_NESTINGDEPTHMETRIC_H_
 
#include "frontends/p4/metrics/metricsStructure.h"
#include "ir/ir.h"
 
namespace P4 {
 
class NestingDepthMetricPass : public Inspector {
 private:
    NestingDepthMetrics &metrics;
    unsigned currentDepth;
    unsigned currentMax;
 
 public:
    explicit NestingDepthMetricPass(Metrics &metricsRef)
        : metrics(metricsRef.nestingDepth), currentDepth(0), currentMax(0) {
        setName("NestingDepthPass");
    }
    bool increment();
    void decrement();
    void logDepth(const cstring name);
    bool enter();
 
    bool preorder(const IR::P4Parser * /*parser*/) override;
    bool preorder(const IR::P4Control * /*control*/) override;
    bool preorder(const IR::Function * /*function*/) override;
    void postorder(const IR::P4Parser *parser) override;
    void postorder(const IR::P4Control *control) override;
    void postorder(const IR::Function *function) override;
    bool preorder(const IR::ParserState * /*state*/) override;
    bool preorder(const IR::SelectExpression * /*stmt*/) override;
    bool preorder(const IR::BlockStatement * /*stmt*/) override;
    void postorder(const IR::ParserState * /*state*/) override;
    void postorder(const IR::SelectExpression * /*stmt*/) override;
    void postorder(const IR::BlockStatement * /*stmt*/) override;
    void postorder(const IR::P4Program * /*program*/) override;
};
 
}  // namespace P4
 
#endif /* FRONTENDS_P4_METRICS_NESTINGDEPTHMETRIC_H_ */