diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -5163,7 +5163,10 @@
   return ArmBuiltinAliasValid(BuiltinID, AliasName, Map, IntrinNames);
 }
 
-static bool ArmSveAliasValid(unsigned BuiltinID, StringRef AliasName) {
+static bool ArmSveAliasValid(ASTContext &Context, unsigned BuiltinID,
+                             StringRef AliasName) {
+  if (Context.BuiltinInfo.isAuxBuiltinID(BuiltinID))
+    BuiltinID = Context.BuiltinInfo.getAuxBuiltinID(BuiltinID);
   return BuiltinID >= AArch64::FirstSVEBuiltin &&
          BuiltinID <= AArch64::LastSVEBuiltin;
 }
@@ -5180,7 +5183,7 @@
   StringRef AliasName = cast<FunctionDecl>(D)->getIdentifier()->getName();
 
   bool IsAArch64 = S.Context.getTargetInfo().getTriple().isAArch64();
-  if ((IsAArch64 && !ArmSveAliasValid(BuiltinID, AliasName)) ||
+  if ((IsAArch64 && !ArmSveAliasValid(S.Context, BuiltinID, AliasName)) ||
       (!IsAArch64 && !ArmMveAliasValid(BuiltinID, AliasName) &&
        !ArmCdeAliasValid(BuiltinID, AliasName))) {
     S.Diag(AL.getLoc(), diag::err_attribute_arm_builtin_alias);
@@ -5210,7 +5213,7 @@
   bool IsAArch64 = S.Context.getTargetInfo().getTriple().isAArch64();
   bool IsARM = S.Context.getTargetInfo().getTriple().isARM();
   bool IsRISCV = S.Context.getTargetInfo().getTriple().isRISCV();
-  if ((IsAArch64 && !ArmSveAliasValid(BuiltinID, AliasName)) ||
+  if ((IsAArch64 && !ArmSveAliasValid(S.Context, BuiltinID, AliasName)) ||
       (IsARM && !ArmMveAliasValid(BuiltinID, AliasName) &&
        !ArmCdeAliasValid(BuiltinID, AliasName)) ||
       (IsRISCV && !RISCVAliasValid(BuiltinID, AliasName)) ||
diff --git a/clang/test/Sema/aarch64-sve-alias-attribute.c b/clang/test/Sema/aarch64-sve-alias-attribute.c
new file mode 100644
--- /dev/null
+++ b/clang/test/Sema/aarch64-sve-alias-attribute.c
@@ -0,0 +1,5 @@
+// RUN: %clang_cc1 -triple aarch64-unknown-linux-gnu -aux-triple aarch64-none-unknown-eabi -target-feature +sve -fopenmp-is-device -fopenmp -verify -fsyntax-only %s
+
+static __inline__ __attribute__((__clang_arm_builtin_alias(__builtin_sve_svabd_n_f64_m))) // expected-no-diagnostics
+void
+nop(void);