[clang] MIPS/Clang: Add more false option pairs into validateTarget (PR #91968)

[YunQiang Su via cfe-commits]

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@@ -273,6 +273,34 @@ bool MipsTargetInfo::validateTarget(DiagnosticsEngine &Diags) const {
     Diags.Report(diag::err_mips_fp64_req) << "-mfp64";
     return false;
   }
+  // FPXX requires mips2+
+  if (FPMode == FPXX && CPU == "mips1") {
+    Diags.Report(diag::err_opt_not_valid_with_opt) << "-mfpxx" << CPU;
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wzssyqa wrote:

Here, it depends on: https://github.com/llvm/llvm-project/pull/92122
Otherwise  `clang -cc1 -triple mips -target-cpu mips1` will always fail.

https://github.com/llvm/llvm-project/pull/91968