================
@@ -672,6 +672,12 @@ static Attr *ProcessStmtAttribute(Sema &S, Stmt *St, const
ParsedAttr &A,
!(A.existsInTarget(S.Context.getTargetInfo()) ||
(S.Context.getLangOpts().SYCLIsDevice && Aux &&
A.existsInTarget(*Aux)))) {
+ // Special case: musttail on WebAssembly without tail-call feature
+ if (A.getKind() == ParsedAttr::AT_MustTail &&
+ !S.Context.getTargetInfo().hasMustTail()) {
+ S.Diag(A.getLoc(), diag::err_wasm_musttail_unsupported);
+ return nullptr;
+ }
----------------
AaronBallman wrote:
You shouldn't need to add this code, either `existsInTarget()` (slightly above)
will catch it, or `checkCommonAttributeFeatures()` (slightly below) will.
https://github.com/llvm/llvm-project/pull/163618
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