diff --git a/llvm/lib/Analysis/VectorUtils.cpp b/llvm/lib/Analysis/VectorUtils.cpp
--- a/llvm/lib/Analysis/VectorUtils.cpp
+++ b/llvm/lib/Analysis/VectorUtils.cpp
@@ -86,6 +86,7 @@
   case Intrinsic::pow:
   case Intrinsic::fma:
   case Intrinsic::fmuladd:
+  case Intrinsic::is_fpclass:
   case Intrinsic::powi:
   case Intrinsic::canonicalize:
   case Intrinsic::fptosi_sat:
@@ -103,6 +104,7 @@
   case Intrinsic::abs:
   case Intrinsic::ctlz:
   case Intrinsic::cttz:
+  case Intrinsic::is_fpclass:
   case Intrinsic::powi:
     return (ScalarOpdIdx == 1);
   case Intrinsic::smul_fix:
diff --git a/llvm/test/Transforms/InstSimplify/is_fpclass.ll b/llvm/test/Transforms/InstSimplify/is_fpclass.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Transforms/InstSimplify/is_fpclass.ll
@@ -0,0 +1,12 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
+; RUN: opt < %s -S -passes=instsimplify | FileCheck %s
+
+define <2 x i1> @f() {
+; CHECK-LABEL: define <2 x i1> @f() {
+; CHECK-NEXT:    ret <2 x i1> zeroinitializer
+;
+  %i = call <2 x i1> @llvm.is.fpclass.v2f16(<2 x half> <half 0xH7C00, half 0xH7C00>, i32 3)
+  ret <2 x i1> %i
+}
+
+declare <2 x i1> @llvm.is.fpclass.v2f16(<2 x half>, i32 immarg)