diff --git a/llvm/include/llvm/CodeGen/ValueTypes.h b/llvm/include/llvm/CodeGen/ValueTypes.h
--- a/llvm/include/llvm/CodeGen/ValueTypes.h
+++ b/llvm/include/llvm/CodeGen/ValueTypes.h
@@ -298,6 +298,7 @@
     }
 
     /// Given a vector type, return the number of elements it contains.
+    /// This assumes a fixed-vector type
     unsigned getVectorNumElements() const {
 #ifdef STRICT_FIXED_SIZE_VECTORS
       assert(isFixedLengthVector() && "Invalid vector type!");
@@ -323,7 +324,8 @@
       return getExtendedVectorElementCount();
     }
 
-    /// Given a vector type, return the minimum number of elements it contains.
+    /// Given a (possibly scalable) vector type,
+    /// return the minimum number of elements it contains.
     unsigned getVectorMinNumElements() const {
       return getVectorElementCount().getKnownMinValue();
     }
diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -15112,7 +15112,7 @@
     }
   }
 
-  if (N0.getOpcode() != ISD::SETCC || CCVT.getVectorNumElements() != 1 ||
+  if (N0.getOpcode() != ISD::SETCC || CCVT.getVectorMinNumElements() != 1 ||
       CCVT.getVectorElementType() != MVT::i1)
     return SDValue();
 
diff --git a/llvm/test/CodeGen/AArch64/vselect-sve-interface-warnings.ll b/llvm/test/CodeGen/AArch64/vselect-sve-interface-warnings.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/vselect-sve-interface-warnings.ll
@@ -0,0 +1,61 @@
+; RUN: llc -mtriple=aarch64-linux-unknown -mattr=+sve -o /dev/null < %s 2>&1 | FileCheck %s  --implicit-check-not "warning" --allow-empty
+
+define <vscale x 8 x i8> @vselect_cmp_ne(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c) {
+  %cmp = icmp ne <vscale x 8 x i8> %a, %b
+  %d = select <vscale x 8 x i1> %cmp, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c
+  ret <vscale x 8 x i8> %d
+}
+
+define <vscale x 8 x i8> @vselect_cmp_eq(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c) {
+  %cmp = icmp eq <vscale x 8 x i8> %a, %b
+  %d = select <vscale x 8 x i1> %cmp, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c
+  ret <vscale x 8 x i8> %d
+}
+
+define <vscale x 8 x i8> @vselect_cmp_sgt(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c) {
+  %cmp = icmp sgt <vscale x 8 x i8> %a, %b
+  %d = select <vscale x 8 x i1> %cmp, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c
+  ret <vscale x 8 x i8> %d
+}
+
+define <vscale x 8 x i8> @vselect_cmp_sge(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c) {
+  %cmp = icmp sge <vscale x 8 x i8> %a, %b
+  %d = select <vscale x 8 x i1> %cmp, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c
+  ret <vscale x 8 x i8> %d
+}
+
+define <vscale x 8 x i8> @vselect_cmp_slt(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c) {
+  %cmp = icmp slt <vscale x 8 x i8> %a, %b
+  %d = select <vscale x 8 x i1> %cmp, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c
+  ret <vscale x 8 x i8> %d
+}
+
+define <vscale x 8 x i8> @vselect_cmp_sle(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c) {
+  %cmp = icmp sle <vscale x 8 x i8> %a, %b
+  %d = select <vscale x 8 x i1> %cmp, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c
+  ret <vscale x 8 x i8> %d
+}
+
+define <vscale x 8 x i8> @vselect_cmp_ugt(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c) {
+  %cmp = icmp ugt <vscale x 8 x i8> %a, %b
+  %d = select <vscale x 8 x i1> %cmp, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c
+  ret <vscale x 8 x i8> %d
+}
+
+define <vscale x 8 x i8> @vselect_cmp_uge(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c) {
+  %cmp = icmp uge <vscale x 8 x i8> %a, %b
+  %d = select <vscale x 8 x i1> %cmp, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c
+  ret <vscale x 8 x i8> %d
+}
+
+define <vscale x 8 x i8> @vselect_cmp_ult(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c) {
+  %cmp = icmp ult <vscale x 8 x i8> %a, %b
+  %d = select <vscale x 8 x i1> %cmp, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c
+  ret <vscale x 8 x i8> %d
+}
+
+define <vscale x 8 x i8> @vselect_cmp_ule(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c) {
+  %cmp = icmp ule <vscale x 8 x i8> %a, %b
+  %d = select <vscale x 8 x i1> %cmp, <vscale x 8 x i8> %b, <vscale x 8 x i8> %c
+  ret <vscale x 8 x i8> %d
+}