[llvm] [AArch64] Use Windows-style prologue/epilogue regardless of CFI. (PR #156467)

[Benjamin Maxwell via llvm-commits]

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@@ -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))
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MacDue wrote:

Looks like `sme-lazy-save-windows.ll` has changed now that we pass `NeedsFrameRecord` (it's now forcing `x29, x30` for the frame record, rather than `x30, x29`). 

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