[llvm] [AArch64] Initial compiler support for SVE unwind on Windows. (PR #138609)

[Martin Storsjö via llvm-commits]

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@@ -1982,6 +2039,8 @@ void AArch64FrameLowering::emitPrologue(MachineFunction &MF,
           : 0;
 
   if (windowsRequiresStackProbe(MF, NumBytes + RealignmentPadding)) {
+    if (AFI->getSVECalleeSavedStackSize())
+      report_fatal_error("SVE callee saves not yet supported");
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mstorsjo wrote:

Can we make the error message a little more descriptive here? SVE callee saves are supported, but not in conjunction with stack probes, right?

https://github.com/llvm/llvm-project/pull/138609