public void visitVarInsn()

in asm/src/main/java/org/objectweb/asm/MethodWriter.java [909:968]
50 lines of code
19 McCabe index (conditional complexity)

  public void visitVarInsn(final int opcode, final int varIndex) {
    lastBytecodeOffset = code.length;
    // Add the instruction to the bytecode of the method.
    if (varIndex < 4 && opcode != Opcodes.RET) {
      int optimizedOpcode;
      if (opcode < Opcodes.ISTORE) {
        optimizedOpcode = Constants.ILOAD_0 + ((opcode - Opcodes.ILOAD) << 2) + varIndex;
      } else {
        optimizedOpcode = Constants.ISTORE_0 + ((opcode - Opcodes.ISTORE) << 2) + varIndex;
      }
      code.putByte(optimizedOpcode);
    } else if (varIndex >= 256) {
      code.putByte(Constants.WIDE).put12(opcode, varIndex);
    } else {
      code.put11(opcode, varIndex);
    }
    // If needed, update the maximum stack size and number of locals, and stack map frames.
    if (currentBasicBlock != null) {
      if (compute == COMPUTE_ALL_FRAMES || compute == COMPUTE_INSERTED_FRAMES) {
        currentBasicBlock.frame.execute(opcode, varIndex, null, null);
      } else {
        if (opcode == Opcodes.RET) {
          // No stack size delta.
          currentBasicBlock.flags |= Label.FLAG_SUBROUTINE_END;
          currentBasicBlock.outputStackSize = (short) relativeStackSize;
          endCurrentBasicBlockWithNoSuccessor();
        } else { // xLOAD or xSTORE
          int size = relativeStackSize + STACK_SIZE_DELTA[opcode];
          if (size > maxRelativeStackSize) {
            maxRelativeStackSize = size;
          }
          relativeStackSize = size;
        }
      }
    }
    if (compute != COMPUTE_NOTHING) {
      int currentMaxLocals;
      if (opcode == Opcodes.LLOAD
          || opcode == Opcodes.DLOAD
          || opcode == Opcodes.LSTORE
          || opcode == Opcodes.DSTORE) {
        currentMaxLocals = varIndex + 2;
      } else {
        currentMaxLocals = varIndex + 1;
      }
      if (currentMaxLocals > maxLocals) {
        maxLocals = currentMaxLocals;
      }
    }
    if (opcode >= Opcodes.ISTORE && compute == COMPUTE_ALL_FRAMES && firstHandler != null) {
      // If there are exception handler blocks, each instruction within a handler range is, in
      // theory, a basic block (since execution can jump from this instruction to the exception
      // handler). As a consequence, the local variable types at the beginning of the handler
      // block should be the merge of the local variable types at all the instructions within the
      // handler range. However, instead of creating a basic block for each instruction, we can
      // get the same result in a more efficient way. Namely, by starting a new basic block after
      // each xSTORE instruction, which is what we do here.
      visitLabel(new Label());
    }
  }