[Bug tree-optimization/53852] [4.9/5/6 Regression] -ftree-loop-linear: large compile time / memory usage

[spop at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53852

--- Comment #19 from Sebastian Pop <spop at gcc dot gnu.org> ---
Patch fixing the compile time problem with at least isl-0.15:
https://gcc.gnu.org/ml/gcc-patches/2015-09/msg00198.html

isl-0.12 does not support the compute-out mechanism.