[llvm] [ARM/X86] Standardize the isEligibleForTailCallOptimization prototypes (PR #90688)

[Eli Friedman via llvm-commits]

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@@ -3028,6 +3029,8 @@ bool ARMTargetLowering::IsEligibleForTailCallOptimization(
 
   // Also avoid sibcall optimization if either caller or callee uses struct
   // return semantics.
+  bool isCalleeStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
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efriedma-quic wrote:

Extra parentheses

https://github.com/llvm/llvm-project/pull/90688