[clang] [llvm] [SystemZ][z/OS] Add options -m[no-]zos-ppa1-name to remove the function name in PPA1. (PR #207416)

[Sean Perry via cfe-commits]

================
@@ -2168,6 +2168,15 @@ void Clang::AddSystemZTargetArgs(const ArgList &Args,
     CmdArgs.push_back("-mfloat-abi");
     CmdArgs.push_back("soft");
   }
+
+  if (Arg *A = Args.getLastArg(options::OPT_mzos_ppa1_name,
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perry-ca wrote:

Move this code inside of the `if (Triple.isOSzOS())` block (flip the order of the if statements) and remove the code that prints the error message.  Marking the option as target specific and only calling getLastArg() on z/OS will end using the existing mechanism for generating that error.

https://github.com/llvm/llvm-project/pull/207416