[Bug c++/35321] New: [4.1/4.2/4.3/4.4 regression] ICE with invalid use of __builtin_offsetof

[Bug c++/35321] New: [4.1/4.2/4.3/4.4 regression] ICE with invalid use of __builtin_offsetof

[reichelt at gcc dot gnu dot org]

The following invalid code snippet triggers an ICE since GCC 4.0.0:

=========================================
struct A
{
  A operator[] (int);
};

struct B
{
  A a;
};

void foo()
{
  __builtin_offsetof(B, a[0]);
}
=========================================

bug.cc: In function 'void foo()':
bug.cc:13: internal compiler error: in fold_offsetof_1, at c-common.c:6850
Please submit a full bug report, [etc.]

Before, the code was rejected as __builtin_offsetof was not yet supported.

The problem is related to PR28573.


-- 
           Summary: [4.1/4.2/4.3/4.4 regression] ICE with invalid use of
                    __builtin_offsetof
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, monitored
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org
 BugsThisDependsOn: 28573


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.1/4.2/4.3/4.4 regression] ICE with invalid use of __builtin_offsetof

[reichelt at gcc dot gnu dot org]

-- 

reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.1.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.1/4.2/4.3/4.4 regression] ICE with invalid use of __builtin_offsetof

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Priority|P3                          |P2
   Last reconfirmed|0000-00-00 00:00:00         |2008-03-03 16:26:46
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.2/4.3/4.4 regression] ICE with invalid use of __builtin_offsetof

[jsm28 at gcc dot gnu dot org]

------- Comment #1 from jsm28 at gcc dot gnu dot org  2008-07-04 22:34 -------
Closing 4.1 branch.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.1/4.2/4.3/4.4 regression]|[4.2/4.3/4.4 regression] ICE
                   |ICE with invalid use of     |with invalid use of
                   |__builtin_offsetof          |__builtin_offsetof
   Target Milestone|4.1.3                       |4.2.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.2/4.3/4.4 regression] ICE with invalid use of __builtin_offsetof

[paolo dot carlini at oracle dot com]

------- Comment #2 from paolo dot carlini at oracle dot com  2008-08-17 15:40 -------
Paolo, can you have a quick look to this one? Seems indeed in the same ball
park of PR28573, which you fixed. Is it just matter of handling TARGET_EXPR the
same way of CALL_EXPR in fold_offsetof_1? (passes testing for me...)


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |paolo at gcc dot gnu dot
                   |                            |org, bonzini at gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.2/4.3/4.4 regression] ICE with invalid use of __builtin_offsetof

[bonzini at gnu dot org]

------- Comment #3 from bonzini at gnu dot org  2008-08-17 16:05 -------
Indeed, it's just that this operator[] throws.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.2/4.3/4.4 regression] ICE with invalid use of __builtin_offsetof

[paolo dot carlini at oracle dot com]

------- Comment #4 from paolo dot carlini at oracle dot com  2008-08-17 16:17 -------
Ok, thanks, I'll submit a patchlet.


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |paolo dot carlini at oracle
                   |dot org                     |dot com
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.2/4.3 regression] ICE with invalid use of __builtin_offsetof

[paolo dot carlini at oracle dot com]

------- Comment #5 from paolo dot carlini at oracle dot com  2008-08-27 17:09 -------
Fixed for 4.4.0.


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|paolo dot carlini at oracle |unassigned at gcc dot gnu
                   |dot com                     |dot org
             Status|ASSIGNED                    |NEW
            Summary|[4.2/4.3/4.4 regression] ICE|[4.2/4.3 regression] ICE
                   |with invalid use of         |with invalid use of
                   |__builtin_offsetof          |__builtin_offsetof


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.2/4.3 regression] ICE with invalid use of __builtin_offsetof

[paolo at gcc dot gnu dot org]

------- Comment #6 from paolo at gcc dot gnu dot org  2008-08-27 17:10 -------
Subject: Bug 35321

Author: paolo
Date: Wed Aug 27 17:08:40 2008
New Revision: 139628

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=139628
Log:
2008-08-27  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/35321
        * c-common.c (fold_offsetof_1): Handle TARGET_EXPR like CALL_EXPR.

/testsuite
2008-08-27  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/35321
        * g++.dg/parse/offsetof8.C: New.

Added:
    trunk/gcc/testsuite/g++.dg/parse/offsetof8.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-common.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.2/4.3 regression] ICE with invalid use of __builtin_offsetof

[pinskia at gcc dot gnu dot org]

------- Comment #7 from pinskia at gcc dot gnu dot org  2009-01-02 22:37 -------
I have a real fix for this bug, and we get an error message now.
t.cc:13: error: using [] in offset with a pointer.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.3 regression] ICE with invalid use of __builtin_offsetof

[jsm28 at gcc dot gnu dot org]

------- Comment #8 from jsm28 at gcc dot gnu dot org  2009-03-31 20:21 -------
Closing 4.2 branch.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.2/4.3 regression] ICE    |[4.3 regression] ICE with
                   |with invalid use of         |invalid use of
                   |__builtin_offsetof          |__builtin_offsetof
   Target Milestone|4.2.5                       |4.3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321

[Bug c++/35321] [4.3 regression] ICE with invalid use of __builtin_offsetof

[rguenth at gcc dot gnu dot org]

------- Comment #9 from rguenth at gcc dot gnu dot org  2009-04-22 15:31 -------
WONTFIX for 4.3.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
      Known to fail|                            |4.3.3
      Known to work|                            |4.4.0
         Resolution|                            |FIXED
   Target Milestone|4.3.4                       |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35321