Code worked the first time after that debug error!

#include <stdint.h>
#include "tm4c1294ncpdt.h"


#define ADC0_SSMUX_AIN 0x0067CDEF    // AIN6,7,12,13,14,15

/*
 * main.c
 */
int main(void) {
	

	int dummy;
	// ADC init
	SYSCTL_RCGCADC_R |= SYSCTL_RCGCADC_R0;				// clock for adc0
	dummy = SYSCTL_RCGCGPIO_R3;
	SYSCTL_RCGCGPIO_R |= SYSCTL_RCGCGPIO_R3;			// clock for portD
	dummy = SYSCTL_RCGCGPIO_R3;

	GPIO_PORTD_DIR_R &= 0x0;							// making it input
	GPIO_PORTD_AFSEL_R |= 0x3F;							// Alternate function enabled for PD_0123456
	GPIO_PORTD_DEN_R &= 0x00;							// Analog pins
	GPIO_PORTD_AMSEL_R |= 0x3F;							// Analog isolation disabled

	// SS config
	ADC0_ACTSS_R &= ~(ADC_ACTSS_ASEN0);  				// DISABLE SS0
	ADC0_EMUX_R |= ADC_EMUX_EM0_ALWAYS;					// always trigger
	ADC0_SSMUX0_R |= ADC0_SSMUX_AIN; 					// input analog pins
	ADC0_IM_R &= 0X0;							// dont send to interrupt controller
	ADC0_SSCTL0_R |= (ADC_SSCTL0_END5 | ADC_SSCTL0_IE5);// end bit set for sample 6 and interrupt enabled
	ADC0_ACTSS_R &= ADC_ACTSS_ASEN0;  					// ENABLE SS0

	// reading the value
	int adcValues[6];
	while(1)
	{
	ADC0_PSSI_R = ADC_PSSI_SS0;							// initiate sampling
	while( (ADC0_RIS_R&0x01) == 0) {};					// Wait for conversion done ( When done RIS = 1 )
	adcValues[0] = ADC0_SSFIFO0_R&0xFFF;						// read result
	adcValues[1] = ADC0_SSFIFO0_R&0xFFF;
	adcValues[2] = ADC0_SSFIFO0_R&0xFFF;
	adcValues[3] = ADC0_SSFIFO0_R&0xFFF;
	adcValues[4] = ADC0_SSFIFO0_R&0xFFF;
	adcValues[5] = ADC0_SSFIFO0_R&0xFFF;
	ADC0_ISC_R = 0x1;									// Acknowledge (Clear RIS)
	}
	//

	return 0;
}