[llvm] [SystemZ][z/OS] Remove use of subsections. (PR #184167)

[Ulrich Weigand via llvm-commits]

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@@ -1610,92 +1697,10 @@ void SystemZAsmPrinter::emitPPA1(MCSymbol *FnEndSym) {
   //       extension.  This optional field is also created if the
   //       routine has alloca(). This may reduce stack space
   //       if alloca() call causes a stack extension.
-  bool HasArgAreaLength =
+  Info.HasArgAreaLength =
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uweigand wrote:

Might be nicer to just store `AllocaReg` in the struct, and have the rest of this logic when emitting.

https://github.com/llvm/llvm-project/pull/184167