[clang] [llvm] [LoongArch] [CodeGen] Add options for Clang to generate LoongArch-specific frecipe & frsqrte instructions (PR #109917)

[via cfe-commits]

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@@ -251,6 +251,20 @@ void loongarch::getLoongArchTargetFeatures(const Driver &D,
     } else /*-mno-lasx*/
       Features.push_back("-lasx");
   }
+
+  // Select frecipe feature determined by -m[no-]frecipe.
+  if (const Arg *A =
+          Args.getLastArg(options::OPT_mfrecipe, options::OPT_mno_frecipe)) {
+    // FRECIPE depends on 64-bit FPU.
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heiher wrote:

Why doesn't `frecipe.s` work with only `+f`?

https://github.com/llvm/llvm-project/pull/109917