CCS/MSP430FR5994: Reading Input Port and Expressions Problem

Part Number: MSP430FR5994

Tool/software: Code Composer Studio

I have two problems.  First, I'm trying to just read the input value on a pin on the launchpad for my MSP430FR5994 and it doesn't show up.  If I look under "registers" in CCS at P3IN, it doesn't change even as I set different pins high.  My code is below.  My second problem is that my variable doesn't show up in either "variables" or "expressions" in CCS.  Am I missing something?

#include <msp430.h> 


/**
 * main.c
 */
int main(void)
{
	WDTCTL = WDTPW | WDTHOLD;	// stop watchdog timer
	unsigned int nonsense;
	P3DIR &= 0xF0;
	while(1){
	     nonsense = P3IN;
	    __delay_cycles(1000);
	}


}