[llvm] [AArch64] treat `@llvm.ssub.sat` the same as `@llvm.aarch64.neon.sqsub` (PR #140454)

[Folkert de Vries via llvm-commits]

================
@@ -1622,8 +1622,10 @@ bool AArch64LegalizerInfo::legalizeSmallCMGlobalValue(
 
 bool AArch64LegalizerInfo::legalizeIntrinsic(LegalizerHelper &Helper,
                                              MachineInstr &MI) const {
-  auto LowerBinOp = [&MI](unsigned Opcode) {
-    MachineIRBuilder MIB(MI);
+  MachineIRBuilder MIB(MI);
----------------
folkertdev wrote:

Fixed that and squashed all the commits

https://github.com/llvm/llvm-project/pull/140454