================
@@ -240,6 +241,10 @@ static bool isSupportedType(mlir::Type ty, const
DataLayout &dl) {
[&](mlir::Type m) { return isSupportedType(m, dl); }))
return false;
if (recTy.isUnion()) {
+ // The size query below reads the tail padding too.
+ if (mlir::Type padding = cast<cir::UnionType>(ty).getPadding();
----------------
xlauko wrote:
I checked. CIRGen only emits a char or an array of chars as union padding, so
C/C++ can’t produce this. I only reached it in hand-written CIR.
I agree rejecting it is than better, I dropped this condition and fixed
UnionType verifier to accept only the real C/C++ produced padding.
https://github.com/llvm/llvm-project/pull/233897
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