Subject: [EXTERNAL] Re: Optimize combination of comparisons to dec+compare
Richard,
> Do we already handle x < y || x <= CST to x <= y - CST?
That is an invalid transformation: e.g., consider x=3, y=4, CST=2.
Can you please clarify?
Thanks,
Eugene
-Original Message-
F
ozenfeld
Cc: gcc-patches@gcc.gnu.org
Subject: Re: Optimize combination of comparisons to dec+compare
On Thu, Dec 10, 2020 at 1:52 AM Eugene Rozenfeld via Gcc-patches
wrote:
>
> This patch adds a pattern for optimizing x < y || x == XXX_MIN to x <=
> y-1 if y is an integer with
On Thu, Dec 10, 2020 at 1:52 AM Eugene Rozenfeld via Gcc-patches
wrote:
>
> This patch adds a pattern for optimizing
> x < y || x == XXX_MIN to x <= y-1
> if y is an integer with TYPE_OVERFLOW_WRAPS.
Do we already handle x < y || x <= CST to x <= y - CST?
That is, the XXX_MIN case is just a speci
