[llvm] [RISCV] Support f16 vmv.v.v and vmerge.vvm intrinsics with Zvfhmin. (PR #101457)

[Brandon Wu via llvm-commits]

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@@ -7229,12 +7230,15 @@ defm : VPatConversionVI_VF<"int_riscv_vfclass", "PseudoVFCLASS">;
 // NOTE: Clang previously used int_riscv_vfmerge for vector-vector, but now uses
 // int_riscv_vmerge. Support both for compatibility.
 foreach vti = AllFloatVectors in {
-  let Predicates = GetVTypePredicates<vti>.Predicates in {
+  let Predicates = !if(!eq(vti.Scalar, f16), [HasVInstructionsF16Minimal],
+                       GetVTypePredicates<vti>.Predicates) in {
     defm : VPatBinaryCarryInTAIL<"int_riscv_vmerge", "PseudoVMERGE", "VVM",
                                  vti.Vector,
                                  vti.Vector, vti.Vector, vti.Mask,
                                  vti.Log2SEW, vti.LMul, vti.RegClass,
                                  vti.RegClass, vti.RegClass>;
+  }
+  let Predicates = GetVTypePredicates<vti>.Predicates in {
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4vtomat wrote:

Do we need the curly bracket?

https://github.com/llvm/llvm-project/pull/101457