[Bug c/44365] New: ICE with -fdump-tree-all

[Bug c/44365] New: ICE with -fdump-tree-all

[bmei at broadcom dot com]

GCC produces the ICE for the following code with -fdump-tree-all. This happens
in both 4.4.x as well as 4.5.0. It is caused by infinitely recursive call to
dump_generic_node (tree-pretty-print.c)

gcc t.c -fdump-tree-all


int main(int argc, char *argv[]){
        int n;
        if(argc==2)
                n=atoi(argv[1]);
        else{
                exit(1);
        }

#define offset(x,y) ((char *)&(x->y))-((char *)x)

        struct {
                int a[n];
                char b[n];
                char c;
        }*bar;
        printf("%d %d %d %d
\n",offset(bar,a[0]),offset(bar,b[0]),offset(bar,c),sizeof(*bar));
        return 0;
}


-- 
           Summary: ICE with -fdump-tree-all
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bmei at broadcom dot com
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44365

[Bug c/44365] ICE with -fdump-tree-all

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2010-06-01 14:38 -------
Confirmed.  C FE issue.  We have a TYPE_DECL that refers to itself.

#1  0x0000000000a519fa in dump_generic_node (buffer=0x1646280, 
    node=0x7ffff5add690, spc=2, flags=0, is_stmt=0 '\000')
    at /space/rguenther/src/svn/gcc-4_5-branch/gcc/tree-pretty-print.c:881
881               dump_generic_node (buffer, TYPE_NAME (node), spc, flags,
false);
(gdb) p node->base.code
$3 = RECORD_TYPE
(gdb) p node->type.name
$4 = (tree) 0x7ffff5afd000
(gdb) p node->type.name->base.code
$5 = TYPE_DECL
(gdb) p node->type.name->common.type
$6 = (tree) 0x7ffff5add690
(gdb) p node->type.name->common.type->type.name
$7 = (tree) 0x7ffff5afd000


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-06-01 14:38:13
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44365

[Bug c/44365] ICE with -fdump-tree-all

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|major                       |normal
           Keywords|                            |ice-on-valid-code


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44365

[Bug c/44365] ICE with -fdump-tree-all

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44365

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.6.0

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-29 01:30:57 UTC ---
Fixed at least in 4.6.0 and above.