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Re: [PATCH] Clear flow-sensitive info in phiopt (PR tree-optimization/67769)
- From: Richard Biener <rguenther at suse dot de>
- To: Marek Polacek <polacek at redhat dot com>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
- Date: Thu, 1 Oct 2015 15:33:05 +0200 (CEST)
- Subject: Re: [PATCH] Clear flow-sensitive info in phiopt (PR tree-optimization/67769)
- Authentication-results: sourceware.org; auth=none
- References: <20150930141739 dot GK6184 at redhat dot com> <alpine dot LSU dot 2 dot 11 dot 1510010956070 dot 6516 at zhemvz dot fhfr dot qr> <20151001132232 dot GR6184 at redhat dot com> <alpine dot LSU dot 2 dot 11 dot 1510011526060 dot 6516 at zhemvz dot fhfr dot qr> <20151001133022 dot GS6184 at redhat dot com>
On Thu, 1 Oct 2015, Marek Polacek wrote:
> On Thu, Oct 01, 2015 at 03:26:34PM +0200, Richard Biener wrote:
> > No, this looks fine.
>
> Thanks. Let me do proper testing then. (And I suppose we might want this
> in gcc-5 as well.)
Yes. All the bugs are latent for GCC 5 (and also 4.9), they are just
now exposed more easily by trusting the ranges in VRP2 (which was really
meant as a way to catch these bugs, not so much to improve VRP2)
Richard.