[Bug c++/47833] New: ICE during GC in gt_ggc_mx_pending_template

[Bug c++/47833] New: ICE during GC in gt_ggc_mx_pending_template

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47833

           Summary: ICE during GC in gt_ggc_mx_pending_template
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jakub@gcc.gnu.org


template <int> int
foo () throw ()
{
  return 0;
}

int
foo ()
{
  if (false)
    {
#define A(N) foo<N> ();
#define B(N) A(N##0) A(N##1) A(N##2) A(N##3) A(N##4) A(N##5) A(N##6) A(N##7)
A(N##8) A(N##9)
#define C(N) B(N##0) B(N##1) B(N##2) B(N##3) B(N##4) B(N##5) B(N##6) B(N##7)
B(N##8) B(N##9)
#define D(N) C(N##0) C(N##1) C(N##2) C(N##3) C(N##4) C(N##5) C(N##6) C(N##7)
C(N##8) C(N##9)
#define E(N) D(N##0) D(N##1) D(N##2) D(N##3) D(N##4) D(N##5) D(N##6) D(N##7)
D(N##8) D(N##9)
#define F(N) E(N##0) E(N##1) E(N##2) E(N##3) E(N##4) E(N##5) E(N##6) E(N##7)
E(N##8) E(N##9)
#define G(N) F(N##0) F(N##1) F(N##2) F(N##3) F(N##4) F(N##5) F(N##6) F(N##7)
F(N##8) F(N##9)
      G(1)
    }
  return 0;
}

ICEs in 4.5/4.6, because the pending_templates list is too long and GC recurses
on it.

[Bug c++/47833] ICE during GC in gt_ggc_mx_pending_template

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47833

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011.02.21 12:07:27
         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-21 12:07:27 UTC ---
Created attachment 23424
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23424
gcc46-pr47833.patch

Untested fix.  The testcase takes over a minute to compile at -O0 on a fast
box, so is not suitable for regression testing.

[Bug c++/47833] ICE during GC in gt_ggc_mx_pending_template

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47833

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-21 17:32:22 UTC ---
Different testcase at https://bugzilla.redhat.com/attachment.cgi?id=479920

[Bug c++/47833] ICE during GC in gt_ggc_mx_pending_template

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47833

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-23 00:47:41 UTC ---
Author: jakub
Date: Wed Feb 23 00:47:38 2011
New Revision: 170424

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170424
Log:
    PR c++/47833
    * pt.c (struct pending_template): Add chain_next GTY option.
    * decl.c (struct named_label_use_entry): Likewise.

Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/pt.c

[Bug c++/47833] ICE during GC in gt_ggc_mx_pending_template

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47833

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-23 00:54:53 UTC ---
Fixed.