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 8E83D3857031; Wed,  1 Jul 2020 13:11:21 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8E83D3857031
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1593609081;
 bh=RzHK5JFD2n1HlOKIRgQHR95tLtne1kijkBMtTc0P9/Q=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=xh8BnXcdKDrwuU8T9Yj0af0G8V5KWZtTJaRg7ahVRS7fM/W67cjrEwAQ3Yn/Ki0vv
 shzHvcJAOzeLLOPZLUXmX2sKeUXRawxWcrlMAPOaVKT2+uvt5MrgYm38fbY4QaxJsb
 zohnAdWtSKmY6kvpztwfPZM54qSwE9oXiViXHDWg=
From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/96015] [10/11 Regression] gcc-10.1.0 miscompiles Python
 on hppa
Date: Wed, 01 Jul 2020 13:11:21 +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: 10.1.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: marxin at gcc dot gnu.org
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: 10.2
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-96015-4-i3uZLwx3dM@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-96015-4@http.gcc.gnu.org/bugzilla/>
References: <bug-96015-4@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
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <http://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Wed, 01 Jul 2020 13:11:21 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96015

--- Comment #7 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
There's ASM diff in between GCC 9 and 10 version:

diff -u good.s bad.s
--- good.s      2020-07-01 15:04:58.315839436 +0200
+++ bad.s       2020-07-01 15:04:30.684040487 +0200
@@ -30,7 +30,7 @@
 .L15:
        ldi 0,%r28
 .L3:
-.L25:
+.L26:
        ldw -84(%r30),%r2
        ldw -60(%r30),%r4
        ldw -56(%r30),%r3
@@ -39,16 +39,14 @@
 .L22:
        bl yes,%r2
        nop
-       comib,=3D,n 0,%r28,.L25
+       comib,=3D,n 0,%r28,.L26
        ldi 0,%r28
-       comclr,<> %r4,%r5,%r0
-       b,n .L23
        comiclr,<< 5,%r3,%r0
-       b,n .L24
-.L6:
-.L23:
-       comib,<< 5,%r3,.L26
+       b,n .L25
+.L12:
+       b .L3
        ldi 1,%r28
+.L25:
        ldil L'.L8,%r28
        ldo R'.L8(%r28),%r28
        ldwx,s %r3(%r28),%r28
@@ -65,34 +63,6 @@
        .word .L12
        .end_brtab
        .text
-.L12:
-       ldi 1,%r28
-.L26:
-       ldw -84(%r30),%r2
-       ldw -60(%r30),%r4
-       ldw -56(%r30),%r3
-       bv %r0(%r2)
-       ldwm -64(%r30),%r5
-.L24:
-       ldil L'.L11,%r28
-       ldo R'.L11(%r28),%r28
-       ldwx,s %r3(%r28),%r28
-       bv,n %r0(%r28)
-       .section        .rodata
-       .align 4
-.L11:
-       .begin_brtab
-       .word .L14
-       .word .L15
-       .word .L6
-       .word .L15
-       .word .L6
-       .word .L15
-       .end_brtab
-       .text
-.L14:
-       b .L3
-       copy %r3,%r28
        .EXIT
        .PROCEND
        .size   long_richcompare, .-long_richcompare
@@ -143,4 +113,4 @@
        .EXIT
        .PROCEND
        .size   main, .-main
-       .ident  "GCC: (SUSE Linux) 9.3.1 20200406 [revision
6db837a5288ee3ca5ec504fbd5a765817e556ac2]"
+       .ident  "GCC: (SUSE Linux) 10.1.1 20200625 [revision
c91e43e9363bd119a695d64505f96539fa451bf2]"=