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#ifndef wasm_analysis_monotone_analyzer_h
#define wasm_analysis_monotone_analyzer_h
#include <iostream>
#include <queue>
#include <vector>
#include "cfg.h"
#include "lattice.h"
#include "transfer-function.h"
namespace wasm::analysis {
template<Lattice L, TransferFunction TxFn> class MonotoneCFGAnalyzer {
using Element = typename L::Element;
L& lattice;
TxFn& txfn;
CFG& cfg;
// The lattice element representing the program state before each block.
std::vector<Element> states;
public:
// Will constuct BlockState objects corresponding to BasicBlocks from the
// given CFG.
MonotoneCFGAnalyzer(L& lattice, TxFn& txfn, CFG& cfg);
// Runs the worklist algorithm to compute the states for the BlockState graph.
void evaluate();
// This modifies the state of the CFG's entry block, with function
// information. This cannot be done otherwise in a forward analysis, as the
// entry block depends on no other blocks, and hence cannot be changed by
// them.
void evaluateFunctionEntry(Function* func);
// Iterates over all of the BlockStates after evaluate() is completed for the
// transfer function to collect the finalized intermediate states from each
// block. For instance, the reaching definitions analysis transfer functions
// will take the final states and use it to populate a map of local.get's to
// sets of local.set's which affect it.
void collectResults();
// The analyzer is run in two distinct phases. First evaluate() runs the
// worklist algorithm to obtain a solution. Then collectResults() iterates
// over the vector of BlockState's, allowing the transfer function to access
// the final states to and turn them into some result.
void evaluateAndCollectResults() {
evaluate();
collectResults();
}
// Prints out all BlockStates in this analyzer.
void print(std::ostream& os);
};
// Deduction guide.
template<typename L, typename TxFn>
MonotoneCFGAnalyzer(L&, TxFn&, CFG&) -> MonotoneCFGAnalyzer<L, TxFn>;
} // namespace wasm::analysis
#include "monotone-analyzer-impl.h"
#endif // wasm_analysis_monotone_analyzer_h
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