The test none/tests/ppc64/test_isa_2_07.c steps beyond the data array in a number of places. The issue is the array is declared to be of size N. The for loop is: for (i=0; i<N; i=i+2). In the body of the loop the array elements A[i] and A[i+1] are accessed. On the last iteration i=N-1 and the second array access becomes A[N-1+1] which accesses one element past the declared array size. Valgrind reports the use of the uninitialized data. Reproducible: Always Actual Results: Valgrind should not report any uninitialized data accesses.
The code was fixed in Valgrind commit 15816. The expected output files were also updated for the new code.