[Bug tree-optimization/64098] ICE isl_ctx.c:172: isl_ctx freed, but some objects still referenced

[mircea.namolaru at inria dot fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64098

--- Comment #1 from Mircea Namolaru <mircea.namolaru at inria dot fr> ---
Bug confirmed. The error message points to a problem in the way in which the 
unroll-and-jam code manage the isl objects (the space is not freed properly). 

I pinned down the function causing the problem, but work is still needed. I
will send a patch in the following days. The patch will also add some test
cases (including this one) for loop-unroll-and-jam.