================
@@ -8287,6 +8289,13 @@ AArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
SDValue InGlue;
if (RequiresSMChange) {
+
+ if (Subtarget->hasSVE()) {
----------------
kmclaughlin-arm wrote:
> when I compile some code with -fno-asynchronous-unwind-tables, it will still
> generate these directives. Perhaps this should have a diagnostic in Clang?
I'm happy to add such a diagnostic, but I want to make sure I have the reason
for this requirement correct.
If I understand correctly, enabling asychronous unwind tables is required now
that I am emitting the save and restore of VG at the point of each call in the
function which changes streaming-mode.
> we want debuggers to be able to unwind the stack even if a function is
> nounwind.
Given this, I'm not entirely sure why we would expect to be able to unwind if
`-fno-asynchronous-unwind-tables` was used or if the function has been marked
as nounwind? I might have misunderstood something though!
https://github.com/llvm/llvm-project/pull/83301
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