The attached file.cpp has a loop that uses type punning, via a union, to copy the high or low part of int32_t elements from an input array into int16_t elements of an output array. However, the loop does not advance through the input array.

Build the attached file ...

$ cl6x -mv6600 -o -s file.cpp

These are the compiler generated comments for the inner loop ...

;**     -----------------------g3:
;** 16  -----------------------    *U$27++ = U$25;
;** 13  -----------------------    if ( L$1 = L$1-1 ) goto g3;

U$27 advances through the output array. But there is no corresponding pointer to advance through the input array.