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 EF34B3858C5E; Mon, 20 Mar 2023 11:53:49 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org EF34B3858C5E
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1679313229;
	bh=vVJ2iUJqp7wfi0JlQV8gS7ZtFBzIG3vCR4fLPotaZN4=;
	h=From:To:Subject:Date:From;
	b=l4cYHG8ON3dbqXQ3INMnXaXLn4i/YabhFtaedNkWP8QG95BIcHp+4f/3uo9i266L4
	 earZGkeG49/IbnDc6paR/aA9jjk9a73uc0WAeKtvU76a5yHisKZVdwOQhgecFv+JIy
	 TVIcll5PNKPYf7ftoUGHQHkNRMPoB0KyP/Bch0yo=
From: "theodort at inf dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/109213] New: [13 Regression] -Os generates
 significantly more code
Date: Mon, 20 Mar 2023 11:53:49 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: theodort at inf dot ethz.ch
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: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-109213-4@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=3D109213

            Bug ID: 109213
           Summary: [13 Regression] -Os generates significantly more code
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: theodort at inf dot ethz.ch
  Target Milestone: ---

Input C-code:

static char g, d[5] =3D {0};
static int f =3D 0, *e;
static void b(int) {};

static int i() {
    for (int j =3D0; j < 1; j +=3D1)
        f =3D 0;
    return 0;
}

static void m() {
    int n[10];
    int o[56] =3D {};
    for (int h =3D 0; h < 3; h++)
        if (d[h])
            for (; f; f++)
                if (n[0])
                    break;

    int *r[] =3D {&o[0]};
}


int main() {
    int p[10] =3D {};
    m();
    if (!i()) {
        int *q =3D &p[0];
        for (; g;)
            b(e =3D=3D q);
    }
}

-----------------------------------------------------
12.2 -Os:

main:
        xorl    %eax, %eax
        movl    %eax, f(%rip)
        xorl    %eax, %eax
        ret

-----------------------------------------------------
trunk -Os:=20

m:
        movl    f(%rip), %eax
        xorl    %edx, %edx
        xorl    %ecx, %ecx
.L5:
        cmpb    $0, d(%rdx)
        je      .L2
        movl    -40(%rsp), %esi
.L3:
        testl   %eax, %eax
        je      .L2
        testl   %esi, %esi
        jne     .L2
        incl    %eax
        movb    $1, %cl
        jmp     .L3
.L2:
        incq    %rdx
        cmpq    $3, %rdx
        jne     .L5
        testb   %cl, %cl
        je      .L1
        movl    %eax, f(%rip)
.L1:
        ret
main:
        xorl    %eax, %eax
        call    m
        xorl    %eax, %eax
        movl    %eax, f(%rip)
        xorl    %eax, %eax
        ret
d:
        .zero   5=