Automerge: [Hexagon] Call MCExpr::print with valid MAI

operator<< should be avoided when operands with VariantKind are dumped.
This prepares for the upcoming change that moves target-specific
VariantKind printer to MCAsmInfo.

Author: MaskRay

llvm/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.cpp

@@ -72,7 +72,7 @@ void HexagonInstPrinter::printOperand(MCInst const *MI, unsigned OpNo,
     if (MO.getExpr()->evaluateAsAbsolute(Value))
       O << formatImm(Value);
     else
-      O << *MO.getExpr();
+      MO.getExpr()->print(O, &MAI);
   } else {
     llvm_unreachable("Unknown operand");
   }
@@ -90,6 +90,6 @@ void HexagonInstPrinter::printBrtarget(MCInst const *MI, unsigned OpNo,
     if (HasExtender || HexagonMCInstrInfo::isConstExtended(MII, *MI))
       if (HexagonMCInstrInfo::getExtendableOp(MII, *MI) == OpNo)
         O << "##";
-    O << Expr;
+    Expr.print(O, &MAI);
   }
 }