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[Bug tree-optimization/82129] [8 Regression] ICE in compute_antic, at tree-ssa-pre.c:2447


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82129

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
So we oscillate in the expression set because we "randomly" take expressions
when intersecting ANTIC_OUT.  Both keeping all and canonicalizing to lowest
expression ID fixes this.

Testing patch.

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