MIPS/Clang: Add more false option pairs into validateTarget

[wzssyqa]

The option pairs include:
-mfpxx -mips1
-msoft-float -mmsa
-mmsa -mabi=32 with 32bit pre-R2 CPUs
-mfpxx -mmsa
-mfp32 -mmsa

[llvmbot]

@llvm/pr-subscribers-clang

Author: YunQiang Su (wzssyqa)

Changes

The option pairs include:
-mfpxx -mips1
-msoft-float -mmsa
-mmsa -mabi=32 with 32bit pre-R2 CPUs
-mfpxx -mmsa
-mfp32 -mmsa

---

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

1 Files Affected:

• (modified) clang/lib/Basic/Targets/Mips.cpp (+28)

diff --git a/clang/lib/Basic/Targets/Mips.cpp b/clang/lib/Basic/Targets/Mips.cpp
index 3a65f53c52485..174bc9d2ab996 100644
--- a/clang/lib/Basic/Targets/Mips.cpp
+++ b/clang/lib/Basic/Targets/Mips.cpp
@@ -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;
+    return false;
+  }
+  // -mmsa with -msoft-float makes nonsense
+  if (FloatABI == SoftFloat && HasMSA) {
+    Diags.Report(diag::err_opt_not_valid_with_opt) << "-msoft-float"
+                                                   << "-mmsa";
+    return false;
+  }
+  // Option -mmsa permitted on Mips32 iff revision 2 or higher is present
+  if (HasMSA && (CPU == "mips1" || CPU == "mips2" || getISARev() < 2) &&
+      ABI == "o32") {
+    Diags.Report(diag::err_mips_fp64_req) << "-mmsa";
+    return false;
+  }
+  // MSA requires FP64
+  if (FPMode == FPXX && HasMSA) {
+    Diags.Report(diag::err_opt_not_valid_with_opt) << "-mfpxx"
+                                                   << "-mmsa";
+    return false;
+  }
+  if (FPMode == FP32 && HasMSA) {
+    Diags.Report(diag::err_opt_not_valid_with_opt) << "-mfp32"
+                                                   << "-mmsa";
+    return false;
+  }
 
   return true;
 }

[wzssyqa]

Depends on: #92122
Merged.

[wzssyqa]

Depens on: #92728