[ARM] Allow usubo and uaddo to happen for any legal type

Author: AZero13

llvm/lib/Target/AArch64/AArch64ISelLowering.h

@@ -328,9 +328,9 @@ class AArch64TargetLowering : public TargetLowering {
 
   bool shouldFormOverflowOp(unsigned Opcode, EVT VT,
                             bool MathUsed) const override {
-    // Using overflow ops for overflow checks only should beneficial on
-    // AArch64.
-    return TargetLowering::shouldFormOverflowOp(Opcode, VT, true);
+    if (VT.isVector())
+      return false;
+    return !isOperationExpand(Opcode, VT);
   }
 
   Value *emitLoadLinked(IRBuilderBase &Builder, Type *ValueTy, Value *Addr,