Add Vector test case

Author: wzssyqa

llvm/test/CodeGen/AArch64/nofpclass.ll

@@ -1,7 +1,7 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
 ; RUN: llc --mtriple=aarch64-linux-gnu < %s | FileCheck %s
 
-define nofpclass(nzero) float @f(float noundef nofpclass(nan) %a, float noundef nofpclass(nan) %b) {
+define nofpclass(nzero) float @f(float nofpclass(nan) %a, float nofpclass(nan) %b) {
 ; CHECK-LABEL: f:
 ; CHECK:       // %bb.0: // %entry
 ; CHECK-NEXT:    fmaxnm s0, s0, s1
@@ -10,3 +10,13 @@ entry:
   %cond = tail call float @llvm.maximumnum.f32(float %a, float %b)
   ret float %cond
 }
+
+define <4 x float> @fv4f32(<4 x float> nofpclass(nan) %a, <4 x float> nofpclass(nan) %b) {
+; CHECK-LABEL: fv4f32:
+; CHECK:       // %bb.0: // %entry
+; CHECK-NEXT:    fmaxnm v0.4s, v0.4s, v1.4s
+; CHECK-NEXT:    ret
+entry:
+  %c = call <4 x float> @llvm.maximumnum.v4f32(<4 x float> %a, <4 x float> %b)
+  ret <4 x float> %c
+}