================
@@ -1056,6 +1083,25 @@ void CoroCloner::create() {
// Set up the new entry block.
replaceEntryBlock();
+ // Turn symmetric transfers into musttail calls.
+ for (CallInst *ResumeCall : Shape.SymmetricTransfers) {
+ ResumeCall = cast<CallInst>(VMap[ResumeCall]);
+ ResumeCall->setCallingConv(NewF->getCallingConv());
+ if (TTI.supportsTailCallFor(ResumeCall)) {
+ // FIXME: Could we support symmetric transfer effectively without
+ // musttail?
+ ResumeCall->setTailCallKind(CallInst::TCK_MustTail);
+ }
+
+ // Put a 'ret void' after the call, and split any remaining instructions to
----------------
mtrofin wrote:
if there are remaining instructions, this will silently elide them. I realize
that there shouldn't be remaining instructions, but we could detect bugs like
the PGO instrumentation + coro one (PR #71263) if that was asserted or WARNed
or something more visible.
https://github.com/llvm/llvm-project/pull/89751
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