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Internals: Keep separate stats for constant pool variables

This commit is contained in:
Geza Lore 2026-06-22 10:04:42 +01:00
parent b37c84109d
commit 9670dabcfe
1 changed files with 46 additions and 8 deletions
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54
src/V3Stats.cpp
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@ -46,6 +46,9 @@ class StatsVisitor final : public VNVisitorConst {
Counters m_dumpster; // Alternate buffer to make discarding parts of the tree easier
Counters* m_accump; // The currently active accumulator
std::vector<uint64_t> m_statVarWidths; // Variables of given width
std::vector<uint64_t> m_constPoolConsts; // Constant pool constants of given width
// Constant pool tables of given width and depth
std::map<std::pair<int, int>, uint64_t> m_constPoolTables;
std::vector<std::map<const std::string, uint32_t>>
m_statVarWidthNames; // Var names of given width
@ -59,15 +62,30 @@ class StatsVisitor final : public VNVisitorConst {
// VISITORS
void visit(AstVar* nodep) override {
if (nodep->dtypep()) {
if (m_statVarWidths.size() <= static_cast<size_t>(nodep->width())) {
m_statVarWidths.resize(nodep->width() + 5);
if (v3Global.opt.statsVars()) { //
m_statVarWidthNames.resize(nodep->width() + 5);
if (nodep->constPoolEntry()) {
// Count constant pool entries
if (AstUnpackArrayDType* const uatp = VN_CAST(nodep->dtypep(), UnpackArrayDType)) {
const int width = uatp->subDTypep()->width();
const int depth = uatp->elementsConst();
++m_constPoolTables[{width, depth}];
} else {
if (m_constPoolConsts.size() <= static_cast<size_t>(nodep->width())) {
m_constPoolConsts.resize(nodep->width() + 5);
}
++m_constPoolConsts.at(nodep->width());
}
} else {
// Count proper variables
if (m_statVarWidths.size() <= static_cast<size_t>(nodep->width())) {
m_statVarWidths.resize(nodep->width() + 5);
if (v3Global.opt.statsVars()) { //
m_statVarWidthNames.resize(nodep->width() + 5);
}
}
++m_statVarWidths.at(nodep->width());
if (v3Global.opt.statsVars()) {
++m_statVarWidthNames.at(nodep->width())[nodep->prettyName()];
}
}
++m_statVarWidths.at(nodep->width());
if (v3Global.opt.statsVars()) {
++m_statVarWidthNames.at(nodep->width())[nodep->prettyName()];
}
}
@ -118,6 +136,26 @@ public:
}
}
// Constant pool constants
for (size_t i = 0; i < m_constPoolConsts.size(); ++i) {
const uint64_t count = m_constPoolConsts.at(i);
if (!count) continue;
std::stringstream ss;
ss << "Vars Const, width " << std::setw(5) << std::dec << i;
addStat(ss.str(), count);
}
// Constant pool tables
for (const auto& it : m_constPoolTables) {
const int depth = it.first.second;
const int width = it.first.first;
const int count = it.second;
std::ostringstream ss;
ss << "Vars Table, width " << std::setw(5) << std::dec << width //
<< " x " << std::setw(5) << std::dec << depth;
addStat(ss.str(), count);
}
// Node types (also total memory usage)
const auto typeName
= [](size_t t) { return std::string{VNType{static_cast<VNType::en>(t)}.ascii()}; };