Index: llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
===================================================================
--- llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -12035,7 +12035,8 @@
 
   SDValue StVal = S->getValue();
   EVT VT = StVal.getValueType();
-  if (!VT.isVector())
+  // All SVE vectors should be aligned to 16 bytes
+  if (!VT.isVector() || VT.isScalableVector())
     return SDValue();
 
   // If we get a splat of zeros, convert this vector store to a store of
Index: llvm/test/CodeGen/AArch64/sve-callbyref-notailcall.ll
===================================================================
--- llvm/test/CodeGen/AArch64/sve-callbyref-notailcall.ll
+++ llvm/test/CodeGen/AArch64/sve-callbyref-notailcall.ll
@@ -1,6 +1,8 @@
 ; Because some arguments are passed by reference (through stack),
 ; the compiler should not do tail-call optimization.
-; RUN: llc -mtriple=aarch64 -mattr=+sve < %s | FileCheck %s
+; RUN: llc -mtriple=aarch64 -mattr=+sve < %s 2>&1 | FileCheck %s
+
+; CHECK-NOT: warning
 
 ; CHECK-LABEL: caller:
 ; CHECK:       addvl sp, sp, #-[[STACKSIZE:[0-9]+]]
Index: llvm/test/CodeGen/AArch64/sve-calling-convention-byref.ll
===================================================================
--- llvm/test/CodeGen/AArch64/sve-calling-convention-byref.ll
+++ llvm/test/CodeGen/AArch64/sve-calling-convention-byref.ll
@@ -1,4 +1,6 @@
-; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve -stop-after=finalize-isel < %s | FileCheck %s
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve -stop-after=finalize-isel < %s 2>&1 | FileCheck %s
+
+; CHECK-NOT: warning
 
 ; Test that z8 and z9, passed in by reference, are correctly loaded from x0 and x1.
 ; i.e. z0 =  %z0