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

[via cfe-commits]

================
@@ -141,6 +141,22 @@ enum NodeType : unsigned {
   VALL_NONZERO,
   VANY_NONZERO,
 
+  // Floating point approximate reciprocal operation
+  FRECIPE_S,
----------------
wangleiat wrote:

> They are not the same. The iocsrrd_* instructions have same operand type `GPR` but frecipe_* instructions have different types: FPR32/FPR64/v8f32/...
> 
> Is it right? @wangleiat

yes, just like a generic ISD node, ADD/FADD ...

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