[llvm] Add a support for per function CIE (PR #192727)

[Sergei Barannikov via llvm-commits]

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@@ -1979,7 +1979,8 @@ void MCDwarfFrameEmitter::emit(MCObjectStreamer &Streamer, bool IsEH) {
       continue;
 
     CIEKey Key(Frame);
-    if (!LastCIEStart || (IsEH && Key != LastKey)) {
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s-barannikov wrote:

Return address register is already a part of CIEKey, so if RA registers are different this should generate a new CIE. Am I missing something?

https://github.com/llvm/llvm-project/pull/192727