MSP430FR2476: Question about ISR in msp430fr267x_eCOMP_03.c example

Hello,

I tried copying the ISR from the msp430fr267x_eCOMP_03.c example here:
https://dev.ti.com/tirex/explore/node?node=ALrqqPTuSq4RjxJIqH-9pQ__IOGqZri__LATEST

I modified the code slightly to this:

#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=ECOMP0_VECTOR
__interrupt void ECOMP0_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(ECOMP0_VECTOR))) ECOMP0_ISR (void)
#else
#error Compiler not supported!
#endif
{
    switch(__even_in_range(CPIV, CPIV__CPIIFG))
    {
        case CPIV__NONE:
            break;
        case CPIV__CPIFG:
            break;
        case CPIV__CPIIFG:
            break;
        default:
            break;
    }
}

When I try running, it gets stuck in that ISR and won't advance.  The disassembly looks like this:

ECOMP0_ISR():
00b574: 1300 RETI
00b576: FFFF FFFF AND.B @R15+,0xffff(R15)
00b57a: FFFF FFFF AND.B @R15+,0xffff(R15)
00b57e: FFFF FFFF AND.B @R15+,0xffff(R15)
00b582: FFFF FFFF AND.B @R15+,0xffff(R15)
...

I checked some other ISRs in my code set and, based on them, tried replacing the switch statement with this:
switch(__even_in_range(CP0IV, CPIV__CPIIFG))
replacing CPIV with CP0IV.

Now the code keeps running after going into the ISR and the Disassembly looks better:

ECOMP0_ISR():
00b56c: 140F PUSHM.A #1,R15
84 switch(__even_in_range(CP0IV, CPIV__CPIIFG))
00b56e: 421F 08E8 MOV.W &eCOMP0_CP0IV,R15
00b572: 160F POPM.A #1,R15
00b574: 1300 RETI

Here's what I found of each in msp430fr2476.h:
SFR_16BIT(CP0IV);                                        /* Comparator Interrupt Vector Word Register */
#define CPIV                             (0xffff)        /* Comparator interrupt vector word register */

Is this a typo in the example?  Or was I doing something else wrong?  Thanks!