================
@@ -155,5 +155,52 @@ std::string hashBlockLoose(BinaryContext &BC, const
BinaryBasicBlock &BB) {
return HashString;
}
+/// An even looser hash level relative to $ hashBlockLoose to use with stale
+/// profile matching, composed of the names of a block's called functions in
+/// lexicographic order.
+std::string hashBlockCalls(BinaryContext &BC, const BinaryBasicBlock &BB) {
+ // The hash is computed by creating a string of all lexicographically ordered
+ // called function names.
+ std::multiset<std::string> FunctionNames;
+ for (const MCInst &Instr : BB) {
+ // Skip non-call instructions.
+ if (!BC.MIB->isCall(Instr))
+ continue;
+ const MCSymbol *CallSymbol = BC.MIB->getTargetSymbol(Instr);
+ if (!CallSymbol)
+ continue;
+ FunctionNames.insert(std::string(CallSymbol->getName()));
+ }
+
+ std::string HashString;
+ for (const std::string &FunctionName : FunctionNames)
+ HashString.append(FunctionName);
+
+ return HashString;
+}
+
+/// The same as the $hashBlockCalls function, but for profiled functions.
+std::string
+hashBlockCalls(const DenseMap<uint32_t, StringRef> &IdToFunctionName,
+ const yaml::bolt::BinaryBasicBlockProfile &YamlBB) {
+ std::multiset<std::string> FunctionNames;
+ for (const yaml::bolt::CallSiteInfo &CallSiteInfo : YamlBB.CallSites) {
+ auto It = IdToFunctionName.find(CallSiteInfo.DestId);
+ if (It == IdToFunctionName.end())
+ continue;
+ StringRef Name = It->second;
+ const size_t Pos = Name.find("(*");
----------------
maksfb wrote:
Let's expand `NameResolver` interface to restore the name of the symbol and use
it here.
https://github.com/llvm/llvm-project/pull/96596
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