From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 7096C3858C2D; Thu,  2 Nov 2023 08:43:39 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7096C3858C2D
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1698914619;
	bh=+RcqoEhYHN1V6q4W6AsvVRW59ImBMB4+wIjSr/cFdnY=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=qTfXsN7E728sgozkScolBGidtsBYiy/lGCKjA/m4uSri5Uh0MvVomlNxYnlbXUb+d
	 idUeTeUxPYQIU15p5J/m92PLbtPuhQq96QRjTEsjsgbn3vFREd6NByUlmJIvssucv6
	 tlbsdtDArvCg6I2dFqMqi68gaurLGBbTl/PLp8IE=
From: "chenglulu at loongson dot cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/112330] [14 Regression] LoongArch: Bootstrap failure
 with GAS 2.41
Date: Thu, 02 Nov 2023 08:43:34 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: assemble-failure, build
X-Bugzilla-Severity: normal
X-Bugzilla-Who: chenglulu at loongson dot cn
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-112330-4-Q8FCV5g0JF@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-112330-4@http.gcc.gnu.org/bugzilla/>
References: <bug-112330-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112330

--- Comment #14 from chenglulu <chenglulu at loongson dot cn> ---
(In reply to Xi Ruoyao from comment #13)
> (In reply to chenglulu from comment #12)
> > (In reply to Xi Ruoyao from comment #11)
> > > I cherry-picked f87cf663af71e5d78c8d647fa48562102f3b0615 for Binutils=
 2.41
> > > and get some better error message:
> > >=20
> > > t.s:98064: Error: Reloc overflow
> > > t.s:101127: Error: Reloc overflow
> > > t.s:101453: Error: Reloc overflow
> > > t.s:101555: Error: Reloc overflow
> > >=20
> > > t.s is the assembly file in attachments.
> >=20
> > 1fb3cdd87ec61715a5684925fb6d6a6cf53bb97c is also required=EF=BC=8E
>=20
> I know, I'm just trying to understand the issue better.
>=20
> I don't really understand why this was not a problem before r14-4674.  And
> this issue also did not show up immediately after r14-4674 (it even did n=
ot
> show up when I was developing r14-4851).


We can clearly delete the macro ASM_OUTPUT_ALIGN_WITH_NOP in r14-4674, and
before deleting this macro, the generated assembly file looks like this:

...
   .align 16,54525952,4
.L1:
...
   blt  $r12,$r13,.L=EF=BC=91
...

after:

   .align 16
.L1:
...
   blt $r12,$r13,.L1
...

First of all, if you add -mrelax during the assembly process,".align
16,54525952,4" will be based on the situation at the time of assembly, and =
the
choice is to insert a nop function without insertion.But this ".align 16" w=
ill
insert 3 nops unconditionally. When calculating the jump range of the
conditional branch, gcc calculates the space required for .align according =
to
the actual alignment.
So after r14-4674 there will be an error=EF=BC=8E=