[clang] [llvm] [Mips] Add r5900 (PlayStation 2 Emotion Engine) CPU support (PR #176666)

[via cfe-commits]

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@@ -5932,6 +5932,10 @@ def mcheck_zero_division : Flag<["-"], "mcheck-zero-division">,
 def mno_check_zero_division : Flag<["-"], "mno-check-zero-division">,
                               Group<m_mips_Features_Group>;
 def mfix4300 : Flag<["-"], "mfix4300">, Group<m_mips_Features_Group>;
+def mfix_r5900 : Flag<["-"], "mfix-r5900">, Group<m_mips_Features_Group>,
+  HelpText<"Enable R5900 short loop erratum fix">;
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yingopq wrote:

Can the content of `HelpText` be reflected in the name of `def` ?

https://github.com/llvm/llvm-project/pull/176666