[llvm] [ARM]: codegen `llvm.roundeven.v*` (PR #141786)

[David Green via llvm-commits]

================
@@ -1135,8 +1135,14 @@ multiclass vrint_inst_anpm<string opc, bits<2> rm,
         Requires<[HasFPARMv8,HasDPVFP]>;
 }
 
+// Match either any_froundeven or int_arm_neon_vrintn
+def vfrinn_or_froundeven : PatFrags<(ops node:$src), [
+  (int_arm_neon_vrintn node:$src),
+  (any_froundeven node:$src)
+]>;
----------------
davemgreen wrote:

```
// Match either froundeven or int_arm_neon_vrintn
def vrintn_or_froundeven : PatFrags<(ops node:$src),
                                    [(int_arm_neon_vrintn node:$src),
                                     (froundeven node:$src)]>;
```

https://github.com/llvm/llvm-project/pull/141786