Revert D93657219: Need to set output type even if input isn't small

Differential Revision:
D93657219

Original commit changeset: 7425ccd011ad

Original Phabricator Diff: D93657219

fbshipit-source-id: 0601642fbbd3476fdd774ed86b98b2b5c7c3d425

Author: Dian Sheng

cinderx/Jit/lir/postalloc.cpp

@@ -706,11 +706,13 @@ RewriteResult rewriteSubWordRegMoves(instr_iter_t instr_iter) {
     return kUnchanged;
   }
 
-  out->setDataType(OperandBase::k32bit);
-  if (in->dataType() == OperandBase::k8bit ||
-      in->dataType() == OperandBase::k16bit) {
-    static_cast<Operand*>(in)->setDataType(OperandBase::k32bit);
+  size = in->dataType();
+  if (size != OperandBase::k8bit && size != OperandBase::k16bit) {
+    return kUnchanged;
   }
+
+  out->setDataType(OperandBase::k32bit);
+  static_cast<Operand*>(in)->setDataType(OperandBase::k32bit);
   return kChanged;
 }
 #endif