From: Jim Wilson <jim.wilson@linaro.org>
To: Jeff Law <law@redhat.com>
Cc: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH, ARM] stop changing signedness in PROMOTE_MODE
Date: Fri, 10 Jul 2015 15:35:00 -0000 [thread overview]
Message-ID: <CABXYE2WDzWAGzWChovc7t3i8E3=uTmb=tnL=4Ek-ZAP2BiOSOw@mail.gmail.com> (raw)
In-Reply-To: <559DAA34.10707@redhat.com>
On Wed, Jul 8, 2015 at 3:54 PM, Jeff Law <law@redhat.com> wrote:
> On 07/07/2015 10:29 AM, Jim Wilson wrote:
> This is critically important as various parts of the compiler will take a
> degenerate PHI node and propagate the RHS of the PHI into the uses of the
> LHS of the PHI -- without doing any conversions.
I think this is OK, because tree-outof-ssa does send code in basic
blocks through expand_expr, which will emit conversions if necessary.
it is only the conversion of PHI nodes to RTL that is the problem, as
it doesn't use expand_expr, and hence doesn't get the
SUBREG_PROMOTED_P conversions.
Jim
next prev parent reply other threads:[~2015-07-10 15:35 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-30 1:56 Jim Wilson
2015-07-02 9:07 ` Richard Earnshaw
2015-07-07 18:25 ` Jim Wilson
2015-07-07 15:07 ` Jeff Law
2015-07-07 16:29 ` Jim Wilson
2015-07-07 21:35 ` Richard Biener
2015-07-10 15:46 ` Jim Wilson
2015-07-13 8:19 ` Richard Biener
2015-07-13 15:29 ` Michael Matz
2015-07-13 15:35 ` H.J. Lu
2015-07-14 16:38 ` Richard Earnshaw
2015-07-14 16:49 ` Richard Biener
2015-07-14 17:07 ` Jim Wilson
2015-07-14 17:23 ` Richard Biener
2015-07-15 13:25 ` Michael Matz
2015-07-15 16:01 ` Jim Wilson
2015-07-16 9:40 ` Richard Earnshaw
2015-07-16 15:02 ` Michael Matz
2015-07-16 15:20 ` Richard Earnshaw
2015-07-15 13:04 ` Michael Matz
2015-07-08 22:54 ` Jeff Law
2015-07-10 15:35 ` Jim Wilson [this message]
2016-02-04 8:58 ` Ramana Radhakrishnan
2016-02-15 11:32 ` Kyrill Tkachov
2016-02-16 10:44 ` Ramana Radhakrishnan
2016-02-17 10:03 ` Christophe Lyon
2016-02-17 10:05 ` Kyrill Tkachov
2016-02-17 10:20 ` Christophe Lyon
2016-02-17 10:22 ` Kyrill Tkachov
2016-02-18 10:16 ` Christophe Lyon
2016-03-07 4:43 ` Ramana Radhakrishnan
2016-03-07 12:55 ` Christophe Lyon
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