diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.td b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
@@ -145,7 +145,7 @@
 def HasSMEI16I64     : Predicate<"Subtarget->hasSMEI16I64()">,
                                  AssemblerPredicateWithAll<(all_of FeatureSMEI16I64), "sme-i16i64">;
 def HasSME2          : Predicate<"Subtarget->hasSME2()">,
-                                 AssemblerPredicate<(all_of FeatureSME2), "sme2">;
+                                 AssemblerPredicateWithAll<(all_of FeatureSME2), "sme2">;
 // A subset of SVE(2) instructions are legal in Streaming SVE execution mode,
 // they should be enabled if either has been specified.
 def HasSVEorSME
diff --git a/llvm/test/MC/AArch64/SME2/bfcvt.s b/llvm/test/MC/AArch64/SME2/bfcvt.s
--- a/llvm/test/MC/AArch64/SME2/bfcvt.s
+++ b/llvm/test/MC/AArch64/SME2/bfcvt.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/bfcvtn.s b/llvm/test/MC/AArch64/SME2/bfcvtn.s
--- a/llvm/test/MC/AArch64/SME2/bfcvtn.s
+++ b/llvm/test/MC/AArch64/SME2/bfcvtn.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/bfdot.s b/llvm/test/MC/AArch64/SME2/bfdot.s
--- a/llvm/test/MC/AArch64/SME2/bfdot.s
+++ b/llvm/test/MC/AArch64/SME2/bfdot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/bfmlal.s b/llvm/test/MC/AArch64/SME2/bfmlal.s
--- a/llvm/test/MC/AArch64/SME2/bfmlal.s
+++ b/llvm/test/MC/AArch64/SME2/bfmlal.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/bfmlsl.s b/llvm/test/MC/AArch64/SME2/bfmlsl.s
--- a/llvm/test/MC/AArch64/SME2/bfmlsl.s
+++ b/llvm/test/MC/AArch64/SME2/bfmlsl.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/bfvdot.s b/llvm/test/MC/AArch64/SME2/bfvdot.s
--- a/llvm/test/MC/AArch64/SME2/bfvdot.s
+++ b/llvm/test/MC/AArch64/SME2/bfvdot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fadd.s b/llvm/test/MC/AArch64/SME2/fadd.s
--- a/llvm/test/MC/AArch64/SME2/fadd.s
+++ b/llvm/test/MC/AArch64/SME2/fadd.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-f64f64 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2,+sme-f64f64 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-f64f64 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-f64f64 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme-f64f64 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fclamp.s b/llvm/test/MC/AArch64/SME2/fclamp.s
--- a/llvm/test/MC/AArch64/SME2/fclamp.s
+++ b/llvm/test/MC/AArch64/SME2/fclamp.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fcvt.s b/llvm/test/MC/AArch64/SME2/fcvt.s
--- a/llvm/test/MC/AArch64/SME2/fcvt.s
+++ b/llvm/test/MC/AArch64/SME2/fcvt.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fcvtn.s b/llvm/test/MC/AArch64/SME2/fcvtn.s
--- a/llvm/test/MC/AArch64/SME2/fcvtn.s
+++ b/llvm/test/MC/AArch64/SME2/fcvtn.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fcvtzs.s b/llvm/test/MC/AArch64/SME2/fcvtzs.s
--- a/llvm/test/MC/AArch64/SME2/fcvtzs.s
+++ b/llvm/test/MC/AArch64/SME2/fcvtzs.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fcvtzu.s b/llvm/test/MC/AArch64/SME2/fcvtzu.s
--- a/llvm/test/MC/AArch64/SME2/fcvtzu.s
+++ b/llvm/test/MC/AArch64/SME2/fcvtzu.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fdot.s b/llvm/test/MC/AArch64/SME2/fdot.s
--- a/llvm/test/MC/AArch64/SME2/fdot.s
+++ b/llvm/test/MC/AArch64/SME2/fdot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fmax.s b/llvm/test/MC/AArch64/SME2/fmax.s
--- a/llvm/test/MC/AArch64/SME2/fmax.s
+++ b/llvm/test/MC/AArch64/SME2/fmax.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fmaxnm.s b/llvm/test/MC/AArch64/SME2/fmaxnm.s
--- a/llvm/test/MC/AArch64/SME2/fmaxnm.s
+++ b/llvm/test/MC/AArch64/SME2/fmaxnm.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fmin.s b/llvm/test/MC/AArch64/SME2/fmin.s
--- a/llvm/test/MC/AArch64/SME2/fmin.s
+++ b/llvm/test/MC/AArch64/SME2/fmin.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fminnm.s b/llvm/test/MC/AArch64/SME2/fminnm.s
--- a/llvm/test/MC/AArch64/SME2/fminnm.s
+++ b/llvm/test/MC/AArch64/SME2/fminnm.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fmlal.s b/llvm/test/MC/AArch64/SME2/fmlal.s
--- a/llvm/test/MC/AArch64/SME2/fmlal.s
+++ b/llvm/test/MC/AArch64/SME2/fmlal.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fmlsl.s b/llvm/test/MC/AArch64/SME2/fmlsl.s
--- a/llvm/test/MC/AArch64/SME2/fmlsl.s
+++ b/llvm/test/MC/AArch64/SME2/fmlsl.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fsub.s b/llvm/test/MC/AArch64/SME2/fsub.s
--- a/llvm/test/MC/AArch64/SME2/fsub.s
+++ b/llvm/test/MC/AArch64/SME2/fsub.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-f64f64 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2,+sme-f64f64 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-f64f64 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-f64f64 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme-f64f64 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/fvdot.s b/llvm/test/MC/AArch64/SME2/fvdot.s
--- a/llvm/test/MC/AArch64/SME2/fvdot.s
+++ b/llvm/test/MC/AArch64/SME2/fvdot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/sclamp.s b/llvm/test/MC/AArch64/SME2/sclamp.s
--- a/llvm/test/MC/AArch64/SME2/sclamp.s
+++ b/llvm/test/MC/AArch64/SME2/sclamp.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/scvtf.s b/llvm/test/MC/AArch64/SME2/scvtf.s
--- a/llvm/test/MC/AArch64/SME2/scvtf.s
+++ b/llvm/test/MC/AArch64/SME2/scvtf.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/sdot.s b/llvm/test/MC/AArch64/SME2/sdot.s
--- a/llvm/test/MC/AArch64/SME2/sdot.s
+++ b/llvm/test/MC/AArch64/SME2/sdot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2,+sme-i16i64 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme-i16i64 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/smax.s b/llvm/test/MC/AArch64/SME2/smax.s
--- a/llvm/test/MC/AArch64/SME2/smax.s
+++ b/llvm/test/MC/AArch64/SME2/smax.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/smin.s b/llvm/test/MC/AArch64/SME2/smin.s
--- a/llvm/test/MC/AArch64/SME2/smin.s
+++ b/llvm/test/MC/AArch64/SME2/smin.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/smlal.s b/llvm/test/MC/AArch64/SME2/smlal.s
--- a/llvm/test/MC/AArch64/SME2/smlal.s
+++ b/llvm/test/MC/AArch64/SME2/smlal.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/smlall.s b/llvm/test/MC/AArch64/SME2/smlall.s
--- a/llvm/test/MC/AArch64/SME2/smlall.s
+++ b/llvm/test/MC/AArch64/SME2/smlall.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2,+sme-i16i64 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme-i16i64 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/smlsl.s b/llvm/test/MC/AArch64/SME2/smlsl.s
--- a/llvm/test/MC/AArch64/SME2/smlsl.s
+++ b/llvm/test/MC/AArch64/SME2/smlsl.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/smlsll.s b/llvm/test/MC/AArch64/SME2/smlsll.s
--- a/llvm/test/MC/AArch64/SME2/smlsll.s
+++ b/llvm/test/MC/AArch64/SME2/smlsll.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2,+sme-i16i64 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme-i16i64 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/sqcvt.s b/llvm/test/MC/AArch64/SME2/sqcvt.s
--- a/llvm/test/MC/AArch64/SME2/sqcvt.s
+++ b/llvm/test/MC/AArch64/SME2/sqcvt.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/sqcvtn.s b/llvm/test/MC/AArch64/SME2/sqcvtn.s
--- a/llvm/test/MC/AArch64/SME2/sqcvtn.s
+++ b/llvm/test/MC/AArch64/SME2/sqcvtn.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/sqcvtu.s b/llvm/test/MC/AArch64/SME2/sqcvtu.s
--- a/llvm/test/MC/AArch64/SME2/sqcvtu.s
+++ b/llvm/test/MC/AArch64/SME2/sqcvtu.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/sqcvtun.s b/llvm/test/MC/AArch64/SME2/sqcvtun.s
--- a/llvm/test/MC/AArch64/SME2/sqcvtun.s
+++ b/llvm/test/MC/AArch64/SME2/sqcvtun.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/sqdmulh.s b/llvm/test/MC/AArch64/SME2/sqdmulh.s
--- a/llvm/test/MC/AArch64/SME2/sqdmulh.s
+++ b/llvm/test/MC/AArch64/SME2/sqdmulh.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/srshl.s b/llvm/test/MC/AArch64/SME2/srshl.s
--- a/llvm/test/MC/AArch64/SME2/srshl.s
+++ b/llvm/test/MC/AArch64/SME2/srshl.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/sudot.s b/llvm/test/MC/AArch64/SME2/sudot.s
--- a/llvm/test/MC/AArch64/SME2/sudot.s
+++ b/llvm/test/MC/AArch64/SME2/sudot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/sumlall.s b/llvm/test/MC/AArch64/SME2/sumlall.s
--- a/llvm/test/MC/AArch64/SME2/sumlall.s
+++ b/llvm/test/MC/AArch64/SME2/sumlall.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/suvdot.s b/llvm/test/MC/AArch64/SME2/suvdot.s
--- a/llvm/test/MC/AArch64/SME2/suvdot.s
+++ b/llvm/test/MC/AArch64/SME2/suvdot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/svdot.s b/llvm/test/MC/AArch64/SME2/svdot.s
--- a/llvm/test/MC/AArch64/SME2/svdot.s
+++ b/llvm/test/MC/AArch64/SME2/svdot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2,+sme-i16i64 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme-i16i64 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/uclamp.s b/llvm/test/MC/AArch64/SME2/uclamp.s
--- a/llvm/test/MC/AArch64/SME2/uclamp.s
+++ b/llvm/test/MC/AArch64/SME2/uclamp.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/ucvtf.s b/llvm/test/MC/AArch64/SME2/ucvtf.s
--- a/llvm/test/MC/AArch64/SME2/ucvtf.s
+++ b/llvm/test/MC/AArch64/SME2/ucvtf.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/udot.s b/llvm/test/MC/AArch64/SME2/udot.s
--- a/llvm/test/MC/AArch64/SME2/udot.s
+++ b/llvm/test/MC/AArch64/SME2/udot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2,+sme-i16i64 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme-i16i64 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/umax.s b/llvm/test/MC/AArch64/SME2/umax.s
--- a/llvm/test/MC/AArch64/SME2/umax.s
+++ b/llvm/test/MC/AArch64/SME2/umax.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/umin.s b/llvm/test/MC/AArch64/SME2/umin.s
--- a/llvm/test/MC/AArch64/SME2/umin.s
+++ b/llvm/test/MC/AArch64/SME2/umin.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/umlal.s b/llvm/test/MC/AArch64/SME2/umlal.s
--- a/llvm/test/MC/AArch64/SME2/umlal.s
+++ b/llvm/test/MC/AArch64/SME2/umlal.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/umlall.s b/llvm/test/MC/AArch64/SME2/umlall.s
--- a/llvm/test/MC/AArch64/SME2/umlall.s
+++ b/llvm/test/MC/AArch64/SME2/umlall.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2,+sme-i16i64 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme-i16i64 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/umlsl.s b/llvm/test/MC/AArch64/SME2/umlsl.s
--- a/llvm/test/MC/AArch64/SME2/umlsl.s
+++ b/llvm/test/MC/AArch64/SME2/umlsl.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/umlsll.s b/llvm/test/MC/AArch64/SME2/umlsll.s
--- a/llvm/test/MC/AArch64/SME2/umlsll.s
+++ b/llvm/test/MC/AArch64/SME2/umlsll.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2,+sme-i16i64 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme-i16i64 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/uqcvt.s b/llvm/test/MC/AArch64/SME2/uqcvt.s
--- a/llvm/test/MC/AArch64/SME2/uqcvt.s
+++ b/llvm/test/MC/AArch64/SME2/uqcvt.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/uqcvtn.s b/llvm/test/MC/AArch64/SME2/uqcvtn.s
--- a/llvm/test/MC/AArch64/SME2/uqcvtn.s
+++ b/llvm/test/MC/AArch64/SME2/uqcvtn.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/urshl.s b/llvm/test/MC/AArch64/SME2/urshl.s
--- a/llvm/test/MC/AArch64/SME2/urshl.s
+++ b/llvm/test/MC/AArch64/SME2/urshl.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/usdot.s b/llvm/test/MC/AArch64/SME2/usdot.s
--- a/llvm/test/MC/AArch64/SME2/usdot.s
+++ b/llvm/test/MC/AArch64/SME2/usdot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/usmlall.s b/llvm/test/MC/AArch64/SME2/usmlall.s
--- a/llvm/test/MC/AArch64/SME2/usmlall.s
+++ b/llvm/test/MC/AArch64/SME2/usmlall.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
 // RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=+sme2 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2 < %s \
-// RUN:        | llvm-objdump --no-print-imm-hex -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump --no-print-imm-hex -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2 -disassemble -show-encoding \
diff --git a/llvm/test/MC/AArch64/SME2/uvdot.s b/llvm/test/MC/AArch64/SME2/uvdot.s
--- a/llvm/test/MC/AArch64/SME2/uvdot.s
+++ b/llvm/test/MC/AArch64/SME2/uvdot.s
@@ -5,7 +5,7 @@
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | llvm-objdump -d --mattr=+sme2,+sme-i16i64 - | FileCheck %s --check-prefix=CHECK-INST
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-i16i64 < %s \
-// RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// RUN:        | llvm-objdump -d --mattr=-sme2 - | FileCheck %s --check-prefix=CHECK-UNKNOWN
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-i16i64 < %s \
 // RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
 // RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme-i16i64 -disassemble -show-encoding \
diff --git a/llvm/test/MC/Disassembler/AArch64/mattr-all.txt b/llvm/test/MC/Disassembler/AArch64/mattr-all.txt
--- a/llvm/test/MC/Disassembler/AArch64/mattr-all.txt
+++ b/llvm/test/MC/Disassembler/AArch64/mattr-all.txt
@@ -39,3 +39,20 @@
 ## predres (to make sure sysreg aliases work)
 # CHECK: cfp rctx, x0
 [0x80,0x73,0x0b,0xd5]
+
+## sme
+# CHECK: addha za0.s, p0/m, p0/m, z0.s
+[0x00,0x00,0x90,0xc0]
+
+## smef64
+# CHECK: fmopa za0.d, p0/m, p0/m, z0.d, z0.d
+[0x00,0x00,0xc0,0x80]
+
+## smei64
+# CHECK: addha za0.d, p0/m, p0/m, z0.d
+[0x00,0x00,0xd0,0xc0]
+
+## sme2
+# CHECK: add { z0.h, z1.h }, { z0.h, z1.h }, z0.h
+[0x00,0xa3,0x60,0xc1]
+