[llvm] Reland "[AArch64][SME] Split SMECallAttrs out of SMEAttrs" (PR #138671)

[Benjamin Maxwell via llvm-commits]

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@@ -8951,14 +8959,13 @@ static SDValue emitSMEStateSaveRestore(const AArch64TargetLowering &TLI,
   return TLI.LowerCallTo(CLI).second;
 }
 
-static unsigned getSMCondition(const SMEAttrs &CallerAttrs,
-                               const SMEAttrs &CalleeAttrs) {
-  if (!CallerAttrs.hasStreamingCompatibleInterface() ||
-      CallerAttrs.hasStreamingBody())
+static unsigned getSMCondition(const SMECallAttrs &CallAttrs) {
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MacDue wrote:

:+1:  I've gone with `getSMToggleCondition` (since that matches the enum it returns). 

https://github.com/llvm/llvm-project/pull/138671