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Store IdString lengths and use them

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This commit is contained in:
Robert O'Callahan 2025-08-20 03:47:03 +00:00
parent ae219cb8f9
commit d70924ace2
3 changed files with 38 additions and 28 deletions
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2
kernel/io.cc
View file

@ -587,7 +587,7 @@ void format_emit_idstring(std::string &result, std::string_view spec, int *dynam
{
if (spec == "%s") {
// Format checking will have guaranteed num_dynamic_ints == 0.
result += arg.c_str();
result += arg.str_view();
return;
}
format_emit_stringf(result, spec, dynamic_ints, num_dynamic_ints, arg.c_str());

6
kernel/rtlil.cc
View file

@ -35,7 +35,7 @@ YOSYS_NAMESPACE_BEGIN
bool RTLIL::IdString::destruct_guard_ok = false;
RTLIL::IdString::destruct_guard_t RTLIL::IdString::destruct_guard;
std::vector<char*> RTLIL::IdString::global_id_storage_;
std::vector<RTLIL::IdString::Storage> RTLIL::IdString::global_id_storage_;
std::unordered_map<std::string_view, int> RTLIL::IdString::global_id_index_;
#ifndef YOSYS_NO_IDS_REFCNT
std::vector<uint32_t> RTLIL::IdString::global_refcount_storage_;
@ -57,14 +57,14 @@ static void populate(std::string_view name)
name = name.substr(1);
}
RTLIL::IdString::global_id_index_.insert({name, GetSize(RTLIL::IdString::global_id_storage_)});
RTLIL::IdString::global_id_storage_.push_back(const_cast<char*>(name.data()));
RTLIL::IdString::global_id_storage_.push_back({const_cast<char*>(name.data()), GetSize(name)});
}
void RTLIL::IdString::prepopulate()
{
int size = static_cast<short>(RTLIL::StaticId::STATIC_ID_END);
global_id_storage_.reserve(size);
RTLIL::IdString::global_id_storage_.push_back(const_cast<char*>(""));
RTLIL::IdString::global_id_storage_.push_back({const_cast<char*>(""), 0});
global_id_index_.reserve(size);
global_refcount_storage_.resize(size, 1);
#define X(N) populate("\\" #N);

58
kernel/rtlil.h
View file

@ -137,6 +137,11 @@ namespace RTLIL
struct RTLIL::IdString
{
struct Storage {
char *buf;
int size;
};
#undef YOSYS_XTRACE_GET_PUT
#undef YOSYS_SORT_ID_FREE_LIST
#undef YOSYS_USE_STICKY_IDS
@ -150,7 +155,7 @@ struct RTLIL::IdString
~destruct_guard_t() { destruct_guard_ok = false; }
} destruct_guard;
static std::vector<char*> global_id_storage_;
static std::vector<Storage> global_id_storage_;
static std::unordered_map<std::string_view, int> global_id_index_;
#ifndef YOSYS_NO_IDS_REFCNT
// For prepopulated IdStrings, the refcount is meaningless since they
@ -173,10 +178,10 @@ struct RTLIL::IdString
#ifdef YOSYS_XTRACE_GET_PUT
for (int idx = 0; idx < GetSize(global_id_storage_); idx++)
{
if (global_id_storage_.at(idx) == nullptr)
if (global_id_storage_.at(idx).buf == nullptr)
log("#X# DB-DUMP index %d: FREE\n", idx);
else
log("#X# DB-DUMP index %d: '%s' (ref %u)\n", idx, global_id_storage_.at(idx), global_refcount_storage_.at(idx));
log("#X# DB-DUMP index %d: '%s' (ref %u)\n", idx, global_id_storage_.at(idx).buf, global_refcount_storage_.at(idx));
}
#endif
}
@ -203,7 +208,7 @@ struct RTLIL::IdString
#endif
#ifdef YOSYS_XTRACE_GET_PUT
if (yosys_xtrace && idx >= static_cast<short>(StaticId::STATIC_ID_END))
log("#X# GET-BY-INDEX '%s' (index %d, refcount %u)\n", global_id_storage_.at(idx), idx, global_refcount_storage_.at(idx));
log("#X# GET-BY-INDEX '%s' (index %d, refcount %u)\n", global_id_storage_.at(idx).buf, idx, global_refcount_storage_.at(idx));
#endif
return idx;
}
@ -224,7 +229,7 @@ struct RTLIL::IdString
#endif
#ifdef YOSYS_XTRACE_GET_PUT
if (yosys_xtrace)
log("#X# GET-BY-NAME '%s' (index %d, refcount %u)\n", global_id_storage_.at(it->second), it->second, global_refcount_storage_.at(it->second));
log("#X# GET-BY-NAME '%s' (index %d, refcount %u)\n", global_id_storage_.at(it->second).buf, it->second, global_refcount_storage_.at(it->second));
#endif
return it->second;
}
@ -243,32 +248,31 @@ struct RTLIL::IdString
if (global_free_idx_list_.empty()) {
log_assert(global_id_storage_.size() < 0x40000000);
global_free_idx_list_.push_back(global_id_storage_.size());
global_id_storage_.push_back(nullptr);
global_id_storage_.push_back({nullptr, 0});
global_refcount_storage_.push_back(0);
}
int idx = global_free_idx_list_.back();
global_free_idx_list_.pop_back();
char* buf = static_cast<char*>(malloc(p.size() + 1));
memcpy(buf, p.data(), p.size());
buf[p.size()] = 0;
global_id_storage_.at(idx) = buf;
global_id_index_.insert(it, {std::string_view(buf, p.size()), idx});
global_refcount_storage_.at(idx)++;
#else
int idx = global_id_storage_.size();
global_id_storage_.push_back(strdup(p));
global_id_index_[global_id_storage_.back()] = idx;
global_id_storage_.push_back({nullptr, 0});
#endif
char* buf = static_cast<char*>(malloc(p.size() + 1));
memcpy(buf, p.data(), p.size());
buf[p.size()] = 0;
global_id_storage_.at(idx) = {buf, GetSize(p)};
global_id_index_.insert(it, {std::string_view(buf, p.size()), idx});
if (yosys_xtrace) {
log("#X# New IdString '%s' with index %d.\n", global_id_storage_.at(idx), idx);
log("#X# New IdString '%s' with index %d.\n", global_id_storage_.at(idx).buf, idx);
log_backtrace("-X- ", yosys_xtrace-1);
}
#ifdef YOSYS_XTRACE_GET_PUT
if (yosys_xtrace)
log("#X# GET-BY-NAME '%s' (index %d, refcount %u)\n", global_id_storage_.at(idx), idx, global_refcount_storage_.at(idx));
log("#X# GET-BY-NAME '%s' (index %d, refcount %u)\n", global_id_storage_.at(idx).buf, idx, global_refcount_storage_.at(idx));
#endif
#ifdef YOSYS_USE_STICKY_IDS
@ -293,7 +297,7 @@ struct RTLIL::IdString
#ifdef YOSYS_XTRACE_GET_PUT
if (yosys_xtrace) {
log("#X# PUT '%s' (index %d, refcount %u)\n", global_id_storage_.at(idx), idx, global_refcount_storage_.at(idx));
log("#X# PUT '%s' (index %d, refcount %u)\n", global_id_storage_.at(idx).buf, idx, global_refcount_storage_.at(idx));
}
#endif
@ -307,14 +311,14 @@ struct RTLIL::IdString
static inline void free_reference(int idx)
{
if (yosys_xtrace) {
log("#X# Removed IdString '%s' with index %d.\n", global_id_storage_.at(idx), idx);
log("#X# Removed IdString '%s' with index %d.\n", global_id_storage_.at(idx).buf, idx);
log_backtrace("-X- ", yosys_xtrace-1);
}
log_assert(idx >= static_cast<short>(StaticId::STATIC_ID_END));
global_id_index_.erase(global_id_storage_.at(idx));
free(global_id_storage_.at(idx));
global_id_storage_.at(idx) = nullptr;
global_id_index_.erase(global_id_storage_.at(idx).buf);
free(global_id_storage_.at(idx).buf);
global_id_storage_.at(idx) = {nullptr, 0};
global_free_idx_list_.push_back(idx);
}
#else
@ -358,11 +362,17 @@ struct RTLIL::IdString
constexpr inline const IdString &id_string() const { return *this; }
inline const char *c_str() const {
return global_id_storage_.at(index_);
return global_id_storage_.at(index_).buf;
}
inline std::string str() const {
return std::string(global_id_storage_.at(index_));
const Storage &storage = global_id_storage_.at(index_);
return std::string(storage.buf, storage.size);
}
inline std::string_view str_view() const {
const Storage &storage = global_id_storage_.at(index_);
return std::string_view(storage.buf, storage.size);
}
inline bool operator<(const IdString &rhs) const {
@ -394,7 +404,7 @@ struct RTLIL::IdString
}
std::string substr(size_t pos = 0, size_t len = std::string::npos) const {
if (len == std::string::npos || len >= strlen(c_str() + pos))
if (len == std::string::npos || len + pos >= size())
return std::string(c_str() + pos);
else
return std::string(c_str() + pos, len);
@ -420,7 +430,7 @@ struct RTLIL::IdString
}
size_t size() const {
return strlen(c_str());
return global_id_storage_.at(index_).size;
}
bool empty() const {