From: Eric Botcazou <botcazou@adacore.com>
To: gcc-patches@gcc.gnu.org, Richard Biener <richard.guenther@gmail.com>
Subject: Re: [RFA/RFC] [PR tree-optimization/80635] Optimize some V_C_Es with limited ranges into NOP_EXPRs
Date: Sun, 05 Apr 2020 22:12:07 +0200 [thread overview]
Message-ID: <1947142.GPyrdmMyVU@polaris> (raw)
In-Reply-To: <A19343A0-0BDD-47C5-9E84-1D4147472195@gmail.com>
> ISTR Ada uses V_C_E to implement checks on value ranges to types. We need to
> make sure to not interfere with this.
Yes, Jeff privately asked some time ago whether this would be problematic and
I answered that this wouldn't. Ada no longer uses VIEW_CONVERT_EXPR between
scalar types, including for checks, for about a decade and I actually said to
Jeff that the optimizers ought to do the same.
--
Eric Botcazou
next prev parent reply other threads:[~2020-04-05 20:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-05 15:25 Jeff Law
2020-04-05 18:48 ` Richard Biener
2020-04-05 18:52 ` Jeff Law
2020-04-05 20:12 ` Eric Botcazou [this message]
2020-04-05 20:21 ` Eric Botcazou
2020-04-06 9:14 ` Richard Biener
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