From: Kyrill Tkachov <kyrylo.tkachov@foss.arm.com>
To: Bernd Edlinger <bernd.edlinger@hotmail.de>,
Richard Biener <rguenther@suse.de>
Cc: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>,
Richard Earnshaw <richard.earnshaw@arm.com>,
Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>,
Eric Botcazou <ebotcazou@adacore.com>, Jeff Law <law@redhat.com>,
Jakub Jelinek <jakub@redhat.com>
Subject: Re: [PATCH] Sanitizing the middle-end interface to the back-end for strict alignment
Date: Tue, 27 Aug 2019 10:07:00 -0000 [thread overview]
Message-ID: <52c7ef9f-9fa2-6126-abf3-dc48c1a2d580@foss.arm.com> (raw)
In-Reply-To: <AM6PR10MB2566CF3F93327C1666133CF4E4AC0@AM6PR10MB2566.EURPRD10.PROD.OUTLOOK.COM>
Hi Bernd,
On 8/15/19 8:47 PM, Bernd Edlinger wrote:
> Hi,
>
> this is the split out part from the "Fix not 8-byte aligned ldrd/strd on ARMv5 (PR 89544)"
> which is sanitizing the middle-end interface to the back-end for strict alignment,
> and a couple of bug-fixes that are necessary to survive boot-strap.
> It is intended to be applied after the PR 89544 fix.
>
> I think it would be possible to change the default implementation of STACK_SLOT_ALIGNMENT
> to make all stack variables always naturally aligned instead of doing that only
> in assign_parm_setup_stack, but would still like to avoid changing too many things
> that do not seem to have a problem. Since this would affect many targets, and more
> kinds of variables that may probably not have a strict alignment problem.
> But I am ready to take your advice though.
>
>
> Boot-strapped and reg-tested on x86_64-pc-linux-gnu and arm-linux-gnueabihf
> Is it OK for trunk?
I'm not opposed to the checks but...
>
> Thanks
> Bernd.
>
Index: gcc/config/arm/arm.md
===================================================================
--- gcc/config/arm/arm.md (Revision 274531)
+++ gcc/config/arm/arm.md (Arbeitskopie)
@@ -5838,6 +5838,12 @@
(match_operand:DI 1 "general_operand"))]
"TARGET_EITHER"
"
+ gcc_checking_assert (!MEM_P (operands[0])
+ || MEM_ALIGN (operands[0])
+ >= GET_MODE_ALIGNMENT (DImode));
+ gcc_checking_assert (!MEM_P (operands[1])
+ || MEM_ALIGN (operands[1])
+ >= GET_MODE_ALIGNMENT (DImode));
if (can_create_pseudo_p ())
{
if (!REG_P (operands[0]))
@@ -6014,6 +6020,12 @@
{
rtx base, offset, tmp;
+ gcc_checking_assert (!MEM_P (operands[0])
+ || MEM_ALIGN (operands[0])
+ >= GET_MODE_ALIGNMENT (SImode));
+ gcc_checking_assert (!MEM_P (operands[1])
+ || MEM_ALIGN (operands[1])
+ >= GET_MODE_ALIGNMENT (SImode));
if (TARGET_32BIT || TARGET_HAVE_MOVT)
{
/* Everything except mem = const or mem = mem can be done easily. */
@@ -6503,6 +6515,12 @@
(match_operand:HI 1 "general_operand"))]
"TARGET_EITHER"
"
+ gcc_checking_assert (!MEM_P (operands[0])
+ || MEM_ALIGN (operands[0])
+ >= GET_MODE_ALIGNMENT (HImode));
+ gcc_checking_assert (!MEM_P (operands[1])
+ || MEM_ALIGN (operands[1])
+ >= GET_MODE_ALIGNMENT (HImode));
if (TARGET_ARM)
{
if (can_create_pseudo_p ())
@@ -6912,6 +6930,12 @@
(match_operand:HF 1 "general_operand"))]
"TARGET_EITHER"
"
+ gcc_checking_assert (!MEM_P (operands[0])
+ || MEM_ALIGN (operands[0])
+ >= GET_MODE_ALIGNMENT (HFmode));
+ gcc_checking_assert (!MEM_P (operands[1])
+ || MEM_ALIGN (operands[1])
+ >= GET_MODE_ALIGNMENT (HFmode));
if (TARGET_32BIT)
{
if (MEM_P (operands[0]))
@@ -6976,6 +7000,12 @@
(match_operand:SF 1 "general_operand"))]
"TARGET_EITHER"
"
+ gcc_checking_assert (!MEM_P (operands[0])
+ || MEM_ALIGN (operands[0])
+ >= GET_MODE_ALIGNMENT (SFmode));
+ gcc_checking_assert (!MEM_P (operands[1])
+ || MEM_ALIGN (operands[1])
+ >= GET_MODE_ALIGNMENT (SFmode));
if (TARGET_32BIT)
{
if (MEM_P (operands[0]))
@@ -7071,6 +7101,12 @@
(match_operand:DF 1 "general_operand"))]
"TARGET_EITHER"
"
+ gcc_checking_assert (!MEM_P (operands[0])
+ || MEM_ALIGN (operands[0])
+ >= GET_MODE_ALIGNMENT (DFmode));
+ gcc_checking_assert (!MEM_P (operands[1])
+ || MEM_ALIGN (operands[1])
+ >= GET_MODE_ALIGNMENT (DFmode));
if (TARGET_32BIT)
{
if (MEM_P (operands[0]))
Index: gcc/config/arm/neon.md
===================================================================
--- gcc/config/arm/neon.md (Revision 274531)
+++ gcc/config/arm/neon.md (Arbeitskopie)
@@ -127,6 +127,12 @@
(match_operand:TI 1 "general_operand"))]
"TARGET_NEON"
{
+ gcc_checking_assert (!MEM_P (operands[0])
+ || MEM_ALIGN (operands[0])
+ >= GET_MODE_ALIGNMENT (TImode));
+ gcc_checking_assert (!MEM_P (operands[1])
+ || MEM_ALIGN (operands[1])
+ >= GET_MODE_ALIGNMENT (TImode));
if (can_create_pseudo_p ())
{
if (!REG_P (operands[0]))
@@ -139,6 +145,12 @@
(match_operand:VSTRUCT 1 "general_operand"))]
"TARGET_NEON"
{
+ gcc_checking_assert (!MEM_P (operands[0])
+ || MEM_ALIGN (operands[0])
+ >= GET_MODE_ALIGNMENT (<MODE>mode));
+ gcc_checking_assert (!MEM_P (operands[1])
+ || MEM_ALIGN (operands[1])
+ >= GET_MODE_ALIGNMENT (<MODE>mode));
if (can_create_pseudo_p ())
{
if (!REG_P (operands[0]))
@@ -151,6 +163,12 @@
(match_operand:VH 1 "s_register_operand"))]
"TARGET_NEON"
{
+ gcc_checking_assert (!MEM_P (operands[0])
+ || MEM_ALIGN (operands[0])
+ >= GET_MODE_ALIGNMENT (<MODE>mode));
+ gcc_checking_assert (!MEM_P (operands[1])
+ || MEM_ALIGN (operands[1])
+ >= GET_MODE_ALIGNMENT (<MODE>mode));
if (can_create_pseudo_p ())
{
if (!REG_P (operands[0]))
Index: gcc/config/arm/vec-common.md
===================================================================
--- gcc/config/arm/vec-common.md (Revision 274531)
+++ gcc/config/arm/vec-common.md (Arbeitskopie)
@@ -26,6 +26,12 @@
"TARGET_NEON
|| (TARGET_REALLY_IWMMXT && VALID_IWMMXT_REG_MODE (<MODE>mode))"
{
+ gcc_checking_assert (!MEM_P (operands[0])
+ || MEM_ALIGN (operands[0])
+ >= GET_MODE_ALIGNMENT (<MODE>mode));
+ gcc_checking_assert (!MEM_P (operands[1])
+ || MEM_ALIGN (operands[1])
+ >= GET_MODE_ALIGNMENT (<MODE>mode));
if (can_create_pseudo_p ())
{
if (!REG_P (operands[0]))
... can we please factor the (!MEM_P (operands[0]) || MEM_ALIGN (operands[0]) >= GET_MODE_ALIGNMENT (<MODE>mode)) checks into a common function and use that?
Thanks,
Kyrill
next prev parent reply other threads:[~2019-08-27 9:25 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-10 12:51 [PATCHv2] Fix not 8-byte aligned ldrd/strd on ARMv5 (PR 89544) Bernd Edlinger
2019-03-19 14:01 ` [PING] " Bernd Edlinger
2019-03-21 11:26 ` Richard Biener
2019-03-22 17:47 ` Bernd Edlinger
2019-03-25 9:28 ` Richard Biener
2019-07-30 22:13 ` [PATCHv3] " Bernd Edlinger
2019-07-31 13:17 ` Richard Earnshaw (lists)
2019-08-01 11:19 ` Bernd Edlinger
2019-08-02 9:10 ` Richard Earnshaw (lists)
2019-08-02 13:11 ` Richard Biener
2019-08-02 19:01 ` Bernd Edlinger
2019-08-08 14:20 ` [PATCHv4] " Bernd Edlinger
2019-08-14 10:54 ` [PING] " Bernd Edlinger
2019-08-14 12:27 ` Richard Biener
2019-08-14 22:26 ` Bernd Edlinger
2019-08-15 8:58 ` Richard Biener
2019-08-15 12:38 ` Bernd Edlinger
2019-08-15 13:03 ` Richard Biener
2019-08-15 14:33 ` Richard Biener
2019-08-15 15:28 ` Bernd Edlinger
2019-08-15 17:42 ` Richard Biener
2019-08-15 21:19 ` [PATCHv5] " Bernd Edlinger
2019-08-20 5:38 ` Jeff Law
2019-08-20 15:04 ` John David Anglin
[not found] ` <0d39b64f-67d9-7857-cf4e-36f09c0dc15e@bell.net>
2019-08-20 16:03 ` Fwd: " Bernd Edlinger
2019-09-04 12:53 ` Richard Earnshaw (lists)
2019-09-04 13:29 ` Bernd Edlinger
2019-09-04 14:14 ` Richard Earnshaw (lists)
2019-09-04 15:00 ` Bernd Edlinger
2019-09-04 15:48 ` Richard Earnshaw (lists)
2019-09-05 9:21 ` Richard Earnshaw (lists)
2019-09-05 9:35 ` Bernd Edlinger
2019-09-06 10:15 ` Bernd Edlinger
2019-09-06 10:18 ` Richard Earnshaw (lists)
2019-08-15 21:27 ` [PATCH] Sanitizing the middle-end interface to the back-end for strict alignment Bernd Edlinger
2019-08-17 10:11 ` Bernd Edlinger
2019-08-23 0:01 ` Jeff Law
2019-08-23 0:05 ` Jeff Law
2019-08-23 15:15 ` [PING] " Bernd Edlinger
2019-08-27 10:07 ` Kyrill Tkachov [this message]
2019-08-28 11:50 ` Bernd Edlinger
2019-08-28 12:01 ` Kyrill Tkachov
2019-08-28 13:54 ` Christophe Lyon
2019-08-28 21:48 ` Bernd Edlinger
2019-08-29 9:09 ` Kyrill Tkachov
2019-08-29 10:00 ` Christophe Lyon
2019-08-29 22:57 ` Bernd Edlinger
2019-08-30 10:07 ` Kyrill Tkachov
2019-08-30 15:22 ` Christophe Lyon
2019-08-14 11:56 ` [PATCHv3] Fix not 8-byte aligned ldrd/strd on ARMv5 (PR 89544) Richard Biener
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=52c7ef9f-9fa2-6126-abf3-dc48c1a2d580@foss.arm.com \
--to=kyrylo.tkachov@foss.arm.com \
--cc=bernd.edlinger@hotmail.de \
--cc=ebotcazou@adacore.com \
--cc=gcc-patches@gcc.gnu.org \
--cc=jakub@redhat.com \
--cc=law@redhat.com \
--cc=ramana.radhakrishnan@arm.com \
--cc=rguenther@suse.de \
--cc=richard.earnshaw@arm.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).