From: Richard Biener <rguenther@suse.de>
To: gcc-patches@gcc.gnu.org
Cc: Jakub Jelinek <jakub@redhat.com>
Subject: [PATCH][C++] Improve compile-time by ordering expensive checks last
Date: Tue, 16 Apr 2019 12:34:00 -0000 [thread overview]
Message-ID: <alpine.LSU.2.20.1904161425100.27537@zhemvz.fhfr.qr> (raw)
Two cases from a -fsynax-only tramp3d callgrind profile.
Bootstrapped / tested on x86_64-unknown-linux-gnu.
OK for trunk?
Richard.
2019-04-16 Richard Biener <rguenther@suse.de>
cp/
* call.c (null_ptr_cst_p): Order checks according to expensiveness.
(conversion_null_warnings): Likewise.
Index: gcc/cp/call.c
===================================================================
--- gcc/cp/call.c (revision 270387)
+++ gcc/cp/call.c (working copy)
@@ -541,11 +541,11 @@ null_ptr_cst_p (tree t)
STRIP_ANY_LOCATION_WRAPPER (t);
/* Core issue 903 says only literal 0 is a null pointer constant. */
- if (TREE_CODE (type) == INTEGER_TYPE
- && !char_type_p (type)
- && TREE_CODE (t) == INTEGER_CST
+ if (TREE_CODE (t) == INTEGER_CST
+ && !TREE_OVERFLOW (t)
+ && TREE_CODE (type) == INTEGER_TYPE
&& integer_zerop (t)
- && !TREE_OVERFLOW (t))
+ && !char_type_p (type))
return true;
}
else if (CP_INTEGRAL_TYPE_P (type))
@@ -6882,8 +6882,8 @@ conversion_null_warnings (tree totype, t
}
/* Handle zero as null pointer warnings for cases other
than EQ_EXPR and NE_EXPR */
- else if (null_ptr_cst_p (expr) &&
- (TYPE_PTR_OR_PTRMEM_P (totype) || NULLPTR_TYPE_P (totype)))
+ else if ((TYPE_PTR_OR_PTRMEM_P (totype) || NULLPTR_TYPE_P (totype))
+ && null_ptr_cst_p (expr))
{
location_t loc = get_location_for_expr_unwinding_for_system_header (expr);
maybe_warn_zero_as_null_pointer_constant (expr, loc);
next reply other threads:[~2019-04-16 12:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-16 12:34 Richard Biener [this message]
2019-04-17 15:35 ` Richard Biener
2019-04-19 5:32 ` Jason Merrill
2019-04-25 11:27 ` Rainer Orth
2019-04-25 11:36 ` [PATCH] Fix -Wunused-var-35.C (was Re: [PATCH][C++] Improve compile-time by ordering expensive checks last) Jakub Jelinek
2019-04-25 11:48 ` Richard Biener
2019-04-25 11:55 ` Jakub Jelinek
2019-04-25 12:16 ` Richard Biener
2019-04-25 21:14 ` Jason Merrill
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=alpine.LSU.2.20.1904161425100.27537@zhemvz.fhfr.qr \
--to=rguenther@suse.de \
--cc=gcc-patches@gcc.gnu.org \
--cc=jakub@redhat.com \
/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).