[llvm] [AArch64] Fix SVE callee-save layout for nounwind functions on Windows (PR #156467)

[Sander de Smalen via llvm-commits]

================
@@ -3334,8 +3334,9 @@ static void computeCalleeSaveRegisterPairs(
         break;
       case RegPairInfo::FPR64:
         if (AArch64::FPR64RegClass.contains(NextReg) &&
-            !invalidateWindowsRegisterPairing(RPI.Reg1, NextReg, NeedsWinCFI,
-                                              IsFirst, TRI))
+            !invalidateRegisterPairing(
+                RPI.Reg1, NextReg, IsWindows, NeedsWinCFI,
+                /*NeedsFrameRecord=*/false, IsFirst, TRI))
----------------
sdesmalen-arm wrote:

It just seemed odd to handle this differently because of Windows, as there might also be other reasons to want to invalidate this register pairing. I probably shouldn't have set `NeedsFrameRecord` to false though. FWIW the change is NFC.

https://github.com/llvm/llvm-project/pull/156467