================
@@ -296,18 +296,25 @@ void AggExprEmitter::withReturnValueSlot(
(RequiresDestruction && Dest.isIgnored());
Address RetAddr = Address::invalid();
- RawAddress RetAllocaAddr = RawAddress::invalid();
EHScopeStack::stable_iterator LifetimeEndBlock;
llvm::Value *LifetimeSizePtr = nullptr;
llvm::IntrinsicInst *LifetimeStartInst = nullptr;
if (!UseTemp) {
- RetAddr = Dest.getAddress();
+ // It is possible for the existing slot we are using directly to have been
+ // allocated in the correct AS for an indirect return, and then cast to
+ // the default AS (this is the behaviour of CreateMemTemp), however we know
+ // that the return address is expected to point to the uncasted AS, hence
we
+ // strip possible pointer casts here.
----------------
AlexVlx wrote:
Yes, Dest could have been allocated via simple `CreateMemTemp`, which would
then cast from the AllocaAS to the DefaultAS. As the code is currently
structured I didn't see a way to disambiguate between allocating for a return
vs allocating for a "normal" aggregate, so handling it here seemed like the
only way to do it tidily.
https://github.com/llvm/llvm-project/pull/114062
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