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Add an IdString(std::string_view) constructor for efficiency when we already know the string length

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This commit is contained in:
Robert O'Callahan 2025-09-12 04:58:39 +00:00
parent 6b43fca8df
commit 39c6e06e3d
1 changed files with 18 additions and 10 deletions
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28
kernel/rtlil.h
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@ -209,10 +209,15 @@ struct RTLIL::IdString
}
static int get_reference(const char *p)
{
return get_reference(std::string_view(p));
}
static int get_reference(std::string_view p)
{
log_assert(destruct_guard_ok);
auto it = global_id_index_.find((char*)p);
auto it = global_id_index_.find(p);
if (it != global_id_index_.end()) {
#ifndef YOSYS_NO_IDS_REFCNT
global_refcount_storage_.at(it->second)++;
@ -226,14 +231,13 @@ struct RTLIL::IdString
ensure_prepopulated();
if (!p[0])
if (p.empty())
return 0;
log_assert(p[0] == '$' || p[0] == '\\');
log_assert(p[1] != 0);
for (const char *c = p; *c; c++)
if ((unsigned)*c <= (unsigned)' ')
log_error("Found control character or space (0x%02x) in string '%s' which is not allowed in RTLIL identifiers\n", *c, p);
for (char ch : p)
if ((unsigned)ch <= (unsigned)' ')
log_error("Found control character or space (0x%02x) in string '%s' which is not allowed in RTLIL identifiers\n", ch, std::string(p).c_str());
#ifndef YOSYS_NO_IDS_REFCNT
if (global_free_idx_list_.empty()) {
@ -245,8 +249,11 @@ struct RTLIL::IdString
int idx = global_free_idx_list_.back();
global_free_idx_list_.pop_back();
global_id_storage_.at(idx) = strdup(p);
global_id_index_[global_id_storage_.at(idx)] = idx;
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();
@ -255,7 +262,7 @@ struct RTLIL::IdString
#endif
if (yosys_xtrace) {
log("#X# New IdString '%s' with index %d.\n", p, idx);
log("#X# New IdString '%s' with index %d.\n", global_id_storage_.at(idx), idx);
log_backtrace("-X- ", yosys_xtrace-1);
}
@ -322,7 +329,8 @@ struct RTLIL::IdString
inline IdString(const char *str) : index_(get_reference(str)) { }
inline IdString(const IdString &str) : index_(get_reference(str.index_)) { }
inline IdString(IdString &&str) : index_(str.index_) { str.index_ = 0; }
inline IdString(const std::string &str) : index_(get_reference(str.c_str())) { }
inline IdString(const std::string &str) : index_(get_reference(std::string_view(str))) { }
inline IdString(std::string_view str) : index_(get_reference(str)) { }
inline IdString(StaticId id) : index_(static_cast<short>(id)) {}
inline ~IdString() { put_reference(index_); }