================
@@ -7513,6 +7516,44 @@ void Sema::checkCall(NamedDecl *FDecl, const
FunctionProtoType *Proto,
}
}
+ auto *CallerFD = dyn_cast<FunctionDecl>(CurContext);
+ if (FD && CallerFD && Context.getTargetInfo().hasFeature("sme") &&
+ !FD->getBuiltinID()) {
+ // If the callee has an AArch64 SME __arm_locally_streaming attribute
+ // warn if this function returns VL-based value or pass any such
argument,
+ // the streaming and non-streaming vector lengths may be different.
+ ArmStreamingType CalleeFnType = getArmStreamingFnType(FD);
+ ArmStreamingType CallerFnType = getArmStreamingFnType(CallerFD);
+ if (FD->hasAttr<ArmLocallyStreamingAttr>()) {
+ if (AnyScalableArgs)
+ Diag(Loc, diag::warn_sme_locally_streaming_has_vl_args);
+ if (FD->getReturnType()->isSizelessVectorType())
+ Diag(Loc, diag::warn_sme_locally_streaming_returns_vl);
+ }
----------------
sdesmalen-arm wrote:
`__arm_locally_streaming` is not a property of a function interface and
therefore unrelated to a function _call_. That's why this code should live
somewhere else.
https://github.com/llvm/llvm-project/pull/79842
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