reorganize live variable analysis to use it's functions further

2024-01-09 18:13:56 +03:00
parent 3cd16c9d0f
commit 5f8940f34d
2 changed files with 227 additions and 159 deletions
--- a/sapfor/experts/Sapfor_2017/_src/CFGraph/live_variable_analysis.cpp
+++ b/sapfor/experts/Sapfor_2017/_src/CFGraph/live_variable_analysis.cpp
@@ -17,6 +17,8 @@ using std::set;
 using std::unordered_map;
 using std::list;

+using LIVE_VARIABLES::fcall;
+
 namespace SAPFOR
 {
    bool BasicBlock::addLive(const map<SAPFOR::Argument*, set<SAPFOR::BasicBlock*>>& to_add, bool in) {
@@ -114,89 +116,77 @@ namespace SAPFOR
    }
 }

-struct fcall
+bool fcall::tryInsert(set<SAPFOR::BasicBlock*>& dest, SAPFOR::BasicBlock* b)
 {
-private:
-    bool tryInsert(set<SAPFOR::BasicBlock*>& dest, SAPFOR::BasicBlock* b)
+    if (b == block || dest.find(block) == dest.end())
    {
-        if (b == block || dest.find(block) == dest.end())
-        {
-            dest.insert(b);
-            return true;
-        }
-
-        return false;
+        dest.insert(b);
+        return true;
    }

-public:
-    FuncInfo* func;
+    return false;
+}

-    map<int, set<SAPFOR::BasicBlock*>> live_after;
-    set<int> dead_after;
+fcall::fcall(FuncInfo* f, SAPFOR::BasicBlock* b, const vector<SAPFOR::Argument*>& p)
+{
+    block = b;
+    func = f;

-    map<SAPFOR::Argument*, set<SAPFOR::BasicBlock*>> commons_live_after;
-    set<SAPFOR::Argument*> commons_dead_after;
+    int param_size = p.size();
+    params = vector<SAPFOR::Argument*>(param_size, NULL);

-    vector<SAPFOR::Argument*> params;
-    SAPFOR::BasicBlock* block;
+    for (int i = 0; i < param_size; i++)
+        if (f->funcParams.isArgOut(i))
+            params[i] = p[i];
+}

-    fcall(FuncInfo* f, SAPFOR::BasicBlock* b, const vector<SAPFOR::Argument*>& p) 
+void fcall::make_live(SAPFOR::Argument* arg, SAPFOR::BasicBlock* b)
+{
+    if (arg->getMemType() == SAPFOR::CFG_MEM_TYPE::COMMON_ || arg->getMemType() == SAPFOR::CFG_MEM_TYPE::MODULE_)
    {
-        block = b;
-        func = f;
-        
-        int param_size = p.size();
-        params = vector<SAPFOR::Argument*>(param_size, NULL);
-
-        for (int i = 0; i < param_size; i++)
-            if (f->funcParams.isArgOut(i))
-                params[i] = p[i];
+        if (commons_dead_after.find(arg) == commons_dead_after.end())
+            tryInsert(commons_live_after[arg], b);
    }

-    void make_live(SAPFOR::Argument* arg, SAPFOR::BasicBlock* b)
+    auto it = find(params.begin(), params.end(), arg);
+    if (it != params.end())
    {
-        if (arg->getMemType() == SAPFOR::CFG_MEM_TYPE::COMMON_ || arg->getMemType() == SAPFOR::CFG_MEM_TYPE::MODULE_)
-        {
-            if (commons_dead_after.find(arg) == commons_dead_after.end())
-                tryInsert(commons_live_after[arg], b);
-        }
-
-        auto it = find(params.begin(), params.end(), arg);
-        if (it != params.end())
-        {
-            int idx = it - params.begin();
-            if (dead_after.find(idx) == dead_after.end())
-                tryInsert(live_after[idx], b);
-        }
+        int idx = it - params.begin();
+        if (dead_after.find(idx) == dead_after.end())
+            tryInsert(live_after[idx], b);
    }
+}

-    void make_dead(SAPFOR::Argument* arg)
+void fcall::make_dead(SAPFOR::Argument* arg)
+{
+    if (arg->getMemType() == SAPFOR::CFG_MEM_TYPE::COMMON_ || arg->getMemType() == SAPFOR::CFG_MEM_TYPE::MODULE_)
    {
-        if (arg->getMemType() == SAPFOR::CFG_MEM_TYPE::COMMON_ || arg->getMemType() == SAPFOR::CFG_MEM_TYPE::MODULE_)
+        if (commons_live_after.find(arg) == commons_live_after.end())
            commons_dead_after.insert(arg);
-
-        auto it = find(params.begin(), params.end(), arg);
-        if (it != params.end())
-        {
-            int idx = it - params.begin();
-            dead_after.insert(idx);
-        }
    }

-    void updateFromOut()
+    auto it = find(params.begin(), params.end(), arg);
+    if (it != params.end())
    {
-        for (const auto& p : block->getLiveOut())
-            for (auto b : p.second)
-                make_live(p.first, b);
+        int idx = it - params.begin();
+        if (live_after.find(idx) == live_after.end())
+            dead_after.insert(idx);
    }
-};
+}
+
+void fcall::updateFromOut()
+{
+    for (const auto& p : block->getLiveOut())
+        for (auto b : p.second)
+            make_live(p.first, b);
+}

 static bool getLiveDead(const vector<SAPFOR::Argument*>& params, const string& func_name,
                        set<SAPFOR::Argument*>& live, set<SAPFOR::Argument*>& dead);

 static void buildUseDef(SAPFOR::BasicBlock* block, set<SAPFOR::Argument*>& use, set<SAPFOR::Argument*>& def,
                        vector<SAPFOR::Argument*>& formal_parameters, vector<fcall>& fcalls,
-                        const map<string, FuncInfo*>& funcByName);
+                        const map<string, FuncInfo*>& funcByName, bool interprocedural);

 class LiveVarAnalysisNode : public DataFlowAnalysisNode<map<SAPFOR::Argument*, set<SAPFOR::BasicBlock*>>> {
 private:
@@ -234,11 +224,11 @@ public:
    };

    LiveVarAnalysisNode(SAPFOR::BasicBlock* block, vector<SAPFOR::Argument*>& formal_parameters,
-        vector<fcall>& fcalls, const map<string, FuncInfo*>& funcByName)
+                        vector<fcall>& fcalls, const map<string, FuncInfo*>& funcByName)
    {
        setBlock(block);

-        buildUseDef(getBlock(), live, dead, formal_parameters, fcalls, funcByName);
+        buildUseDef(getBlock(), live, dead, formal_parameters, fcalls, funcByName, true);

        for (SAPFOR::Argument* arg : live)
            getBlock()->addLiveIn({ { arg, { getBlock() } } });
@@ -251,8 +241,7 @@ protected:
    vector<fcall>& fcalls;
    const map<string, FuncInfo*>& funcByName;

-    LiveVarAnalysisNode* createNode(SAPFOR::BasicBlock* block) override 
-    {
+    LiveVarAnalysisNode* createNode(SAPFOR::BasicBlock* block) override {
        return new LiveVarAnalysisNode(block, formal_parameters, fcalls, funcByName);
    };
 public:
@@ -261,107 +250,151 @@ public:
    { };
 };

-//Build use and def sets of block. Result are stored in use and def
-static void buildUseDef(SAPFOR::BasicBlock* block, set<SAPFOR::Argument*>& use, set<SAPFOR::Argument*>& def,
-                        vector<SAPFOR::Argument*>& formal_parameters, vector<fcall>& fcalls, 
-                        const map<string, FuncInfo*>& funcByName)
+void getUseDefForInstruction(SAPFOR::BasicBlock* block, SAPFOR::Instruction* instr,
+                             set<SAPFOR::Argument*>& use, set<SAPFOR::Argument*>& def,
+                             vector<SAPFOR::Argument*>& formal_parameters, vector<fcall>& fcalls,
+                             vector<SAPFOR::Argument*>& lastParamRef, int& last_param_ref_index, int& last_param_ref_size,
+                             string& fName, const map<string, FuncInfo*>& funcByName, bool interprocedural)
 {
-    set<SAPFOR::Argument*> tmp_use, tmp_def;
+    for (auto arg : { instr->getArg1(), instr->getArg2(), instr->getResult() })
+        if (arg && arg->getMemType() == SAPFOR::CFG_MEM_TYPE::FUNC_PARAM_)
+            formal_parameters[getParamIndex(arg, formal_parameters.size())] = arg;

-    vector<SAPFOR::Argument*> lastParamRef;
-    bool fcall_added;
+    SAPFOR::Argument* res_arg = NULL;

-    for (auto ir_block : block->getInstructions())
+    static const set<SAPFOR::CFG_OP> skip = { SAPFOR::CFG_OP::ENTRY };
+    SAPFOR::CFG_OP instr_operation = instr->getOperation();
+    if (hasStoreStructure(instr_operation))
    {
-        fcall_added = false;
-        SAPFOR::Instruction* instr = ir_block->getInstruction();
-        for (auto arg : { instr->getArg1(), instr->getArg2(), instr->getResult() })
-            if (arg && arg->getMemType() == SAPFOR::CFG_MEM_TYPE::FUNC_PARAM_)
-                formal_parameters[getParamIndex(arg, formal_parameters.size())] = arg;
+        res_arg = instr->getArg1();
+        set<SAPFOR::Argument*> instr_args = { instr->getResult(), instr->getArg2() };
+        use.insert(instr_args.begin(), instr_args.end());
+    }
+    else if (instr_operation == SAPFOR::CFG_OP::PARAM)
+    {
+        lastParamRef[last_param_ref_index--] = instr->getArg1();
+    }
+    else if (instr_operation == SAPFOR::CFG_OP::F_CALL)
+    {
+        res_arg = instr->getResult();

-        set<SAPFOR::Argument*> res = {}, args = {};
-        SAPFOR::Argument* res_arg = NULL;
+        last_param_ref_size = stoi(instr->getArg2()->getValue());

-        static const set<SAPFOR::CFG_OP> skip = { SAPFOR::CFG_OP::ENTRY };
-        SAPFOR::CFG_OP instr_operation = instr->getOperation();
-        if (hasStoreStructure(instr_operation)) {
-            res_arg = instr->getArg1();
-            std::set<SAPFOR::Argument*> instr_args = { instr->getResult(), instr->getArg2()};
-            insertIfVar(instr_args.begin(), instr_args.end(), args);
-        }
-        else if (instr_operation == SAPFOR::CFG_OP::PARAM)
-            lastParamRef.push_back(instr->getArg1());
-        else if (instr_operation == SAPFOR::CFG_OP::F_CALL)
+        lastParamRef.clear();
+        lastParamRef.resize(last_param_ref_size);
+
+        last_param_ref_index = last_param_ref_size - 1;
+
+        fName = instr->getArg1()->getValue();
+    }
+    else if (skip.find(instr_operation) == skip.end())
+    {
+        //default
+        res_arg = instr->getResult();
+        std::set<SAPFOR::Argument*> intr_args = { instr->getArg1(), instr->getArg2() };
+        use.insert(intr_args.begin(), intr_args.end());
+    }
+    else
+    {
+        //skip
+        return;
+    }
+
+    if ((instr_operation == SAPFOR::CFG_OP::F_CALL || instr_operation == SAPFOR::CFG_OP::PARAM) && last_param_ref_index < 0) {
+        auto func_it = funcByName.find(fName);
+        if (func_it != funcByName.end())
        {
-            res_arg = instr->getResult();
+            fcalls.push_back(fcall(func_it->second, block, lastParamRef));

-            int count = stoi(instr->getArg2()->getValue());
-            if (lastParamRef.size() != count)
-                printInternalError(convertFileName(__FILE__).c_str(), __LINE__);
+            auto r_it = fcalls.rbegin();
+            auto r_end = fcalls.rend();

-            const string& fName = instr->getArg1()->getValue();
-            auto func_it = funcByName.find(fName);
-            if (func_it != funcByName.end())
-            {
-                fcalls.push_back(fcall(func_it->second, block, lastParamRef));
-                fcall_added = true;
-            }
-
-            set<SAPFOR::Argument*> make_live, make_dead;
-            if (fName == "_READ")
-                res.insert(lastParamRef.begin(), lastParamRef.end());
-            else if (getLiveDead(lastParamRef, fName, make_live, make_dead))
-            {
-                insertIfVar(make_live.begin(), make_live.end(), args);
-                insertIfVar(make_dead.begin(), make_dead.end(), res);
-            }
-            else
-                insertIfVar(lastParamRef.begin(), lastParamRef.end(), args);
-
-            lastParamRef.clear();
-        }
-        else if(skip.find(instr_operation) == skip.end())
-        {
-            //default
-            res_arg = instr->getResult();
-            std::set<SAPFOR::Argument*> intr_args = { instr->getArg1(), instr->getArg2() };
-            insertIfVar(intr_args.begin(), intr_args.end(), args);
-        }
-        else {
-            //skip
-            continue;
-        }
-    
-        if (res_arg && res_arg->getType() == SAPFOR::CFG_ARG_TYPE::VAR)
-            res.insert(res_arg);
-
-        for (auto e : args)
-            if (!tmp_def.count(e))
-                tmp_use.insert(e);
-        
-        for(auto e : res)
-            if (!tmp_use.count(e))
-                tmp_def.insert(e);
-
-        auto r_it = fcalls.rbegin();
-        auto r_end = fcalls.rend();
-        if (fcall_added && r_it != r_end)
-            r_it++;
-
-        while (r_it != r_end && r_it->block == block)
-        {
-            for (auto e : args)
-                r_it->make_live(e, block);
-
-            for (auto e : res)
+            for (auto e : def)
                r_it->make_dead(e);

-            r_it++;
+            for (auto e : use)
+                r_it->make_live(e, block);
+        }
+
+        set<SAPFOR::Argument*> make_live, make_dead;
+        if (fName == "_READ")
+            def.insert(lastParamRef.begin(), lastParamRef.end());
+        else if (interprocedural && getLiveDead(lastParamRef, fName, make_live, make_dead))
+        {
+            use.insert(make_live.begin(), make_live.end());
+            def.insert(make_dead.begin(), make_dead.end());
+        }
+        else
+            use.insert(lastParamRef.begin(), lastParamRef.end());
+
+        last_param_ref_index = 0;
+        last_param_ref_size = 0;
+
+        lastParamRef.clear();
+        fName = "";
+    }
+
+    if (res_arg)
+        def.insert(res_arg);
+}
+
+static void updateUseDefForInstruction(SAPFOR::BasicBlock* block, SAPFOR::Instruction* instr,
+                                       set<SAPFOR::Argument*>& use, set<SAPFOR::Argument*>& def,
+                                       vector<SAPFOR::Argument*>& formal_parameters, vector<fcall>& fcalls,
+                                       vector<SAPFOR::Argument*>& lastParamRef, int& last_param_ref_index, int& last_param_ref_size,
+                                       string& fName, const map<string, FuncInfo*>& funcByName, bool interprocedural)
+{
+    set<SAPFOR::Argument*> res, args;
+
+    getUseDefForInstruction(block, instr,
+        args, res,
+        formal_parameters, fcalls,
+        lastParamRef, last_param_ref_index, last_param_ref_size,
+        fName, funcByName,
+        interprocedural
+    );
+
+    for (auto e : res)
+    {
+        if (e && e->getType() == SAPFOR::CFG_ARG_TYPE::VAR)
+        {
+            def.insert(e);
+            use.erase(e);
        }
    }

-    use = tmp_use;
-    def = tmp_def;
+    for (auto e : args)
+    {
+        if (e && e->getType() == SAPFOR::CFG_ARG_TYPE::VAR)
+        {
+            use.insert(e);
+            def.erase(e);
+        }
+    }
+}
+
+//Build use and def sets of block. Result are stored in use and def
+static void buildUseDef(SAPFOR::BasicBlock* block, set<SAPFOR::Argument*>& use, set<SAPFOR::Argument*>& def,
+                        vector<SAPFOR::Argument*>& formal_parameters, vector<fcall>& fcalls,
+                        const map<string, FuncInfo*>& funcByName, bool interprocedural)
+{
+    vector<SAPFOR::Argument*> lastParamRef;
+    int last_param_ref_index = 0, last_param_ref_size = 0;
+    string fName;
+
+    const auto& instructions = block->getInstructions();
+    auto ir_block_it = instructions.rbegin(), ir_block_end = instructions.rend();
+
+    for (; ir_block_it != ir_block_end; ir_block_it++)
+    {
+        updateUseDefForInstruction(block, (*ir_block_it)->getInstruction(),
+            use, def,
+            formal_parameters, fcalls,
+            lastParamRef, last_param_ref_index, last_param_ref_size,
+            fName, funcByName,
+            interprocedural
+        );
+    }
 }

 // prints info about live variables
@@ -379,7 +412,7 @@ void doDumpLive(const map<FuncInfo*, vector<SAPFOR::BasicBlock*>>& CFGraph_for_p
            for (const auto& live : byBB->getLiveIn())
            {
                __spf_print(1, "    %s:", live.first->getValue().c_str());
-                for(auto use : live.second)
+                for (auto use : live.second)
                    __spf_print(1, " %d", use->getNumber());
                __spf_print(1, "\n");
            }
@@ -482,8 +515,8 @@ static void fillLiveDeadArgs(const FuncInfo* func, const vector<SAPFOR::BasicBlo
 // unite global arguments and actual parameters with given indexes for function
 // stores the result in the last argument
 bool joinGlobalsWithParameters(const vector<SAPFOR::Argument*>& params,
-                               const map<string, pair<set<int>, set<SAPFOR::Argument*>>>& params_and_globals,
-                               const string& func_name, set<SAPFOR::Argument*>& result)
+    const map<string, pair<set<int>, set<SAPFOR::Argument*>>>& params_and_globals,
+    const string& func_name, set<SAPFOR::Argument*>& result)
 {
    auto globals_it = params_and_globals.find(func_name);

@@ -498,7 +531,7 @@ bool joinGlobalsWithParameters(const vector<SAPFOR::Argument*>& params,
    for (int idx : param_indexes)
    {
        if (idx < params_size) {
-            if(params[idx] && params[idx]->getType() == SAPFOR::CFG_ARG_TYPE::VAR)
+            if (params[idx] && params[idx]->getType() == SAPFOR::CFG_ARG_TYPE::VAR)
                result.insert(params[idx]);
        }
        else
@@ -511,10 +544,10 @@ bool joinGlobalsWithParameters(const vector<SAPFOR::Argument*>& params,

 // fill sets of arguments wich becomes live or dead after call with parameters params
 static bool getLiveDead(const vector<SAPFOR::Argument*>& params, const string& func_name,
-                        set<SAPFOR::Argument*>& live, set<SAPFOR::Argument*>& dead)
+    set<SAPFOR::Argument*>& live, set<SAPFOR::Argument*>& dead)
 {
    return joinGlobalsWithParameters(params, live_by_func, func_name, live) &&
-           joinGlobalsWithParameters(params, dead_by_func, func_name, dead);
+        joinGlobalsWithParameters(params, dead_by_func, func_name, dead);
 }

 // entrypoint for live variable analysis pass
--- a/sapfor/experts/Sapfor_2017/_src/CFGraph/live_variable_analysis.h
+++ b/sapfor/experts/Sapfor_2017/_src/CFGraph/live_variable_analysis.h
@@ -1,6 +1,35 @@
+#pragma once
+
 #include "../Utils/SgUtils.h"
 #include "CFGraph.h"

+namespace LIVE_VARIABLES
+{
+    struct fcall
+    {
+    private:
+        bool tryInsert(std::set<SAPFOR::BasicBlock*>& dest, SAPFOR::BasicBlock* b);
+    public:
+        FuncInfo* func;
+
+        std::map<int, std::set<SAPFOR::BasicBlock*>> live_after;
+        std::set<int> dead_after;
+
+        std::map<SAPFOR::Argument*, std::set<SAPFOR::BasicBlock*>> commons_live_after;
+        std::set<SAPFOR::Argument*> commons_dead_after;
+
+        std::vector<SAPFOR::Argument*> params;
+        SAPFOR::BasicBlock* block;
+
+        fcall(FuncInfo* f, SAPFOR::BasicBlock* b, const std::vector<SAPFOR::Argument*>& p);
+
+        void make_live(SAPFOR::Argument* arg, SAPFOR::BasicBlock* b);
+        void make_dead(SAPFOR::Argument* arg);
+
+        void updateFromOut();
+    };
+}
+
 template <class IT, class DEST>
 void insertIfVar(IT begin, IT end, DEST& to) {
    for (auto it = begin; it != end; it++)
@@ -8,6 +37,12 @@ void insertIfVar(IT begin, IT end, DEST& to) {
            to.insert(*it);
 };

+void getUseDefForInstruction(SAPFOR::BasicBlock* block, SAPFOR::Instruction* instr,
+                             std::set<SAPFOR::Argument*>& use, std::set<SAPFOR::Argument*>& def,
+                             std::vector<SAPFOR::Argument*>& formal_parameters, std::vector<LIVE_VARIABLES::fcall>& fcalls,
+                             std::vector<SAPFOR::Argument*>& lastParamRef, int& last_param_ref_index, int& last_param_ref_size,
+                             std::string& fName, const std::map<std::string, FuncInfo*>& funcByName, bool interprocedural);
+
 void runLiveVariableAnalysis(const std::map<FuncInfo*, std::vector<SAPFOR::BasicBlock*>>& CFGraph_for_project);

 void doDumpLive(const std::map<FuncInfo*, std::vector<SAPFOR::BasicBlock*>>& CFGraph_for_project);