fortran/3393: ICE in extract_insn, at recog.c:2173

fortran/3393: ICE in extract_insn, at recog.c:2173

[David.Billinghurst]

>Number:         3393
>Category:       fortran
>Synopsis:       ICE in extract_insn, at recog.c:2173
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jun 24 20:56:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     David Billinghurst
>Release:        gcc-3.1
>Organization:
>Environment:
mips-sgi-irix6.5
>Description:
Test g77.f-torture/execute/labug1.f compilation fails for mips-sgi-irix6.5 -mabi=64 with -O2 and -O3.  This is a regression from gcc-3.0.

The failure was introduced between 20010501 and 20010507.  It may be related to PR fortran/3392.

Compiler output is:

labug1.f: In program `labug1':
labug1.f:42: Unrecognizable insn:
(insn 670 276 367 (set (reg:DI 254)
        (plus:DI (reg:DI 254)
            (sign_extend:DI (const_int 50 [0x32])))) -1 (nil)
    (nil))
labug1.f:42: Internal compiler error in extract_insn, at recog.c:2173

>How-To-Repeat:
bootstrap and run g77 testsuite with -mabi=64
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:

Re: fortran/3393: ICE in extract_insn, at recog.c:2173

[Billinghurst, David (CRTS)]

The following reply was made to PR fortran/3393; it has been noted by GNATS.

From: "Billinghurst, David (CRTS)" <David.Billinghurst@riotinto.com>
To: <gcc-gnats@gcc.gnu.org>
Cc:  
Subject: Re: fortran/3393: ICE in extract_insn, at recog.c:2173
Date: Wed, 23 Jan 2002 07:39:12 +0800

 For the record ...
 
 -----Original Message-----
 From: Reichelt [mailto:reichelt@igpm.rwth-aachen.de]
 Sent: Wednesday, 23 January 2002 12:17=20
 To: toon@moene.indiv.nluug.nl; gcc@gcc.gnu.org
 Subject: Re: Plan for bug-fixing g77-3.1.
 
 
 Hello again,
 
 PR 3393 can be boiled down to the following lines of code:
 
       PROGRAM LABUG2
       INTEGER I, J, M
       REAL    A(5,2)
       M =3D 1
       DO J =3D 1, 2
         DO I =3D 1, M
           CALL F1( A(I,J) )
         END DO
       END DO
       CALL F2(M)
       END
 
 I get the following error message when compiling with "g77 -O2 =
 -mabi=3D64"
 on mips-sgi-irix6.5:
 
 labug2.f:11: unrecognizable insn:
 (insn 203 84 144 (set (reg:DI 114)
         (plus:DI (reg:DI 114)
             (sign_extend:DI (const_int 20 [0x14])))) -1 (nil)
     (nil))
 labug2.f:11: Internal compiler error in extract_insn, at recog.c:2129
 
 Again, there's a two-dimensional array involded, so that PR 3393 is
 probably related to PR 3392.
 
 Greetings,
 Volker Reichelt
 
 http://gcc.gnu.org/ml/gcc/2002-01/msg01379.html
 http://gcc.gnu.org/ml/gcc/2002-01/msg01389.html