================
@@ -523,6 +523,12 @@ void CodeGenFunction::FinishFunction(SourceLocation
EndLoc) {
NormalCleanupDest = Address::invalid();
}
+ if (getLangOpts().Coroutines && isCoroutine()) {
+ auto *Record = FnRetTy->getAsCXXRecordDecl();
+ if (Record && Record->hasAttr<CoroAwaitElidableAttr>())
+ CurFn->addFnAttr(llvm::Attribute::CoroGenNoallocRamp);
+ }
----------------
ChuanqiXu9 wrote:
I don't like this. It will add this attribute to all the coroutines with the
attribute
`[[[clang::coro_await_elidable]]](https://github.com/llvm/llvm-project/pull/99282/files#top)`.
In practice it may always cause the CoroSplit pass to generate additional
codes.
What I thought is, in CoroSplit pass, we can visit every user of the function,
and if any user of the function is a call with the elide attribute, we can
generate .noalloc variant for the current coroutine.
https://github.com/llvm/llvm-project/pull/99282
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