================
@@ -1130,8 +1130,96 @@ struct BitTest {
static BitTest decodeBitTestBuiltin(unsigned BuiltinID);
};
+
+// Returns the first convergence entry/loop/anchor instruction found in |BB|.
+// std::nullopt otherwise.
+std::optional<llvm::IntrinsicInst *> getConvergenceToken(llvm::BasicBlock *BB)
{
+ for (auto &I : *BB) {
----------------
Keenuts wrote:
Yep, but I'm not sure I have any other option outside from some kind of
caching(either attribute of a BB, or BB->I map). If it's this kind of
alternative you are thinking about, maybe this should be left in a subsequent
PR as an optimization?
https://github.com/llvm/llvm-project/pull/80680
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