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liberty_cache: key SCL cache on ABC executable mtime and size 

The SCL format is written/read by ABC and can change between ABC builds,
so a cache entry created with a different ABC binary must not be reused.
This commit is contained in:
Emin 2026-08-14 16:04:00 +08:00 committed by nella
parent f77ddfb875
commit b564fa2e71
1 changed files with 8 additions and 0 deletions
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8
passes/techmap/liberty_cache.h
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@ -37,6 +37,14 @@ inline std::string convert_liberty_files_to_merged_scl(const std::vector<std::st
std::string hash_input;
time_t newest_mtime = 0;
// The SCL format is written/read by ABC and can change between ABC builds,
// so the cache key must identify the ABC executable.
if (!abc_exe.empty()) {
struct stat abc_stat;
if (stat(abc_exe.c_str(), &abc_stat) == 0)
hash_input += stringf("|abc:%s:%lld:%lld", abc_exe.c_str(), (long long)abc_stat.st_mtime, (long long)abc_stat.st_size);
}
for (const std::string &liberty_file : sorted_files) {
struct stat liberty_stat;
if (stat(liberty_file.c_str(), &liberty_stat) != 0) {