================
@@ -8287,6 +8289,13 @@ AArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
SDValue InGlue;
if (RequiresSMChange) {
+
+ if (Subtarget->hasSVE()) {
----------------
kmclaughlin-arm wrote:
If we still emit the spill of VG with `-fno-asynchronous-unwind-tables`, I
don't know how we would be able to recover the correct value without the
per-call CFI saves and restores. And without the correct VG value, I don't
think it will be possible to recover any VG based values in the stack frame.
I'm still not sure why this wouldn't require a diagnostic, because if there is
not enough information to recover VG then I don't think we can unwind correctly?
https://github.com/llvm/llvm-project/pull/83301
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