private boolean tryReplacingWithConstant(NormalSsaInsn insn) {
    Insn originalRopInsn = insn.getOriginalRopInsn();
    Rop opcode = originalRopInsn.getOpcode();
    RegisterSpec result = insn.getResult();

    if (result != null && !ssaMeth.isRegALocal(result) && opcode.getOpcode() != RegOps.CONST) {
      TypeBearer type = insn.getResult().getTypeBearer();
      if (type.isConstant() && type.getBasicType() == Type.BT_INT) {
        // Replace the instruction with a constant
        replacePlainInsn(insn, RegisterSpecList.EMPTY, RegOps.CONST, (Constant) type);

        // Remove the source as well if this is a move-result-pseudo
        if (opcode.getOpcode() == RegOps.MOVE_RESULT_PSEUDO) {
          int pred = insn.getBlock().getPredecessors().nextSetBit(0);
          ArrayList<SsaInsn> predInsns = ssaMeth.getBlocks().get(pred).getInsns();
          NormalSsaInsn sourceInsn = (NormalSsaInsn) predInsns.get(predInsns.size() - 1);
          replacePlainInsn(sourceInsn, RegisterSpecList.EMPTY, RegOps.GOTO, null);
        }
        return true;
      }
    }
    return false;
  }
Tries to replace an instruction with a const instruction. The given instruction must have a
constant result for it to be replaced.

@param insn {@code non-null;} instruction to try to replace
@return true if the instruction was replaced
android/android_framework/dex-maker/src/main/java/com/android/dx/ssa/LiteralOpUpgrader.java