[Bug middle-end/69983] [6 Regression] FAIL: gcc.dg/graphite/scop-sor.c scan-tree-dump-times graphite "number of SCoPs: 1" 1

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69983

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
So we fail analyzing the loop nest because a) the loop header check of the
inner
loop makes it conditionally executed, b) we have outer loop IV computes i+-1
guarded by that check.

For a/b) it would be best if the outer loop were tail duplicated.

Looking at the other reported fallout now.