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[Bug tree-optimization/70754] [5/6/7 Regression] ICE during predictive commoning
- From: "pthaugen at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 28 Sep 2016 23:12:47 +0000
- Subject: [Bug tree-optimization/70754] [5/6/7 Regression] ICE during predictive commoning
- Auto-submitted: auto-generated
- References: <bug-70754-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70754
--- Comment #5 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
(In reply to Pat Haugen from comment #4)
> This also occurs on powerpc64/powerpc64le.
>
I should note that the failure on powerpc64* doesn't start until GCC 7 rev
236043, where a TARGET_SCHED_REASSOCIATION_WIDTH function was added, which I
guess makes sense since predictive commoning appears to do some reassociation.
The failure also requires -mcpu=power8 or -mcpu=power9 since those are the only
2 values currently where the target hook will return a value > 1.