From: Siddhesh Poyarekar <siddhesh@gotplt.org>
To: gcc-patches@gcc.gnu.org
Subject: [PATCH 0/3] gimple-fold improvements
Date: Fri, 12 Nov 2021 01:11:13 +0530 [thread overview]
Message-ID: <20211111194116.1626980-1-siddhesh@gotplt.org> (raw)
This patchset improves folding in cases where input lengths
and/or destination sizes may not be constant but are range bound.
Tested on x86_64 with a full bootstrap build and verified that there are
no regressions resulting from this patchset.
Also tested a build of bash, which results in 3 __memcpy_chk calls being
optimized away completely in addition to a couple of memmove and strcpy
chk variants being transformed into regular calls.
Siddhesh Poyarekar (3):
gimple-fold: Transform stp*cpy_chk to str*cpy directly
gimple-fold: Use ranges to simplify _chk calls
gimple-fold: Use ranges to simplify strncat and snprintf
gcc/gimple-fold.c | 312 +++++++++---------------
gcc/testsuite/gcc.dg/Wobjsize-1.c | 5 +-
gcc/testsuite/gcc.dg/fold-stringops-1.c | 23 ++
gcc/testsuite/gcc.dg/fold-stringops-2.c | 63 +++++
gcc/testsuite/gcc.dg/fold-stringops-3.c | 18 ++
5 files changed, 220 insertions(+), 201 deletions(-)
create mode 100644 gcc/testsuite/gcc.dg/fold-stringops-1.c
create mode 100644 gcc/testsuite/gcc.dg/fold-stringops-2.c
create mode 100644 gcc/testsuite/gcc.dg/fold-stringops-3.c
--
2.31.1
next reply other threads:[~2021-11-11 19:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-11 19:41 Siddhesh Poyarekar [this message]
2021-11-11 19:41 ` [PATCH 1/3] gimple-fold: Transform stp*cpy_chk to str*cpy directly Siddhesh Poyarekar
2021-11-12 17:16 ` Prathamesh Kulkarni
2021-11-14 5:48 ` Siddhesh Poyarekar
2021-11-11 19:41 ` [PATCH 2/3] gimple-fold: Use ranges to simplify _chk calls Siddhesh Poyarekar
2021-11-11 19:41 ` [PATCH 3/3] gimple-fold: Use ranges to simplify strncat and snprintf Siddhesh Poyarekar
2021-11-15 10:41 ` Siddhesh Poyarekar
2021-11-15 17:33 ` [PATCH v2 0/3] gimple-fold improvements Siddhesh Poyarekar
2021-11-15 17:33 ` [PATCH v2 1/3] gimple-fold: Transform stp*cpy_chk to str*cpy directly Siddhesh Poyarekar
2021-11-15 19:17 ` Jeff Law
2021-11-15 17:33 ` [PATCH v2 2/3] gimple-fold: Use ranges to simplify _chk calls Siddhesh Poyarekar
2021-11-15 20:25 ` Jeff Law
2021-11-15 22:53 ` Siddhesh Poyarekar
2021-11-15 17:33 ` [PATCH v2 3/3] gimple-fold: Use ranges to simplify strncat and snprintf Siddhesh Poyarekar
2021-11-15 19:38 ` Jeff Law
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211111194116.1626980-1-siddhesh@gotplt.org \
--to=siddhesh@gotplt.org \
--cc=gcc-patches@gcc.gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).