[Bug c++/60820] New: ice in ctor_for_folding, at varpool.c:291

[Bug c++/60820] New: ice in ctor_for_folding, at varpool.c:291

[mliska at suse dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

            Bug ID: 60820
           Summary: ice in ctor_for_folding, at varpool.c:291
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mliska at suse dot cz

I test gcc 4.9 on my x86_64 gentoo machine and ICE is encountered in
'net-misc/nx' package:

lto1: internal compiler error: in ctor_for_folding, at varpool.c:305
0xb4b0b6 ctor_for_folding(tree_node*)
    ../../gcc/varpool.c:292
0xb4b448 dump_varpool_node(_IO_FILE*, varpool_node*)
    ../../gcc/varpool.c:211
0x5bba6a dump_symtab(_IO_FILE*)
    ../../gcc/symtab.c:707
0x546084 do_whole_program_analysis
    ../../gcc/lto/lto.c:3248
0x546084 lto_main()
    ../../gcc/lto/lto.c:3422

decl:
 <var_decl 0x7f574898be40 in6addr_any
    type <record_type 0x7f57488e4690 in6_addr readonly TI
        size <integer_cst 0x7f5748fc60a0 constant 128>
        unit size <integer_cst 0x7f5748fc60c0 constant 16>
        align 32 symtab 0 alias set 0 canonical type 0x7f57488e4dc8
        fields <field_decl 0x7f57488ed980 __in6_u type <union_type
0x7f57488e4d20>
            TI file /usr/include/netinet/in.h line 206 col 9 size <integer_cst
0x7f5748fc60a0 128> unit size <integer_cst 0x7f5748fc60c0 16>
            align 32 offset_align 128
            offset <integer_cst 0x7f5748fc6060 constant 0>
            bit offset <integer_cst 0x7f5748fc60e0 constant 0> context
<record_type 0x7f57488e4dc8 in6_addr>> context <translation_unit_decl
0x7f57488ebb80 D.33269>
        pointer_to_this <pointer_type 0x7f57488e4738>>
    readonly public static weak TI file /usr/include/netinet/in.h line 214 col
30 size <integer_cst 0x7f5748fc60a0 128> unit size <integer_cst 0x7f5748fc60c0
16>
    align 32 context <translation_unit_decl 0x7f5748977ac8 D.36198> attributes
<tree_list 0x7f5748993190> initial <constructor 0x7f5748974798>>

DECL_INITIAL(decl):
 <constructor 0x7f5748974798
    type <record_type 0x7f57488e4690 in6_addr readonly TI
        size <integer_cst 0x7f5748fc60a0 constant 128>
        unit size <integer_cst 0x7f5748fc60c0 constant 16>
        align 32 symtab 0 alias set 0 canonical type 0x7f57488e4dc8
        fields <field_decl 0x7f57488ed980 __in6_u type <union_type
0x7f57488e4d20>
            TI file /usr/include/netinet/in.h line 206 col 9 size <integer_cst
0x7f5748fc60a0 128> unit size <integer_cst 0x7f5748fc60c0 16>
            align 32 offset_align 128
            offset <integer_cst 0x7f5748fc6060 constant 0>
            bit offset <integer_cst 0x7f5748fc60e0 constant 0> context
<record_type 0x7f57488e4dc8 in6_addr>> context <translation_unit_decl
0x7f57488ebb80 D.33269>
        pointer_to_this <pointer_type 0x7f57488e4738>>
    constant static lngt 1 idx <field_decl 0x7f57488ed980 __in6_u>
    val <constructor 0x7f5748974768
        type <union_type 0x7f57488e4d20 TI size <integer_cst 0x7f5748fc60a0
128> unit size <integer_cst 0x7f5748fc60c0 16>
            align 32 symtab 0 alias set 0 canonical type 0x7f57488e4d20 fields
<field_decl 0x7f57488ed7b8 __u6_addr8> context <translation_unit_decl
0x7f57488ebb80 D.33269>
            chain <type_decl 0x7f57488e2cf0 D.33550>>
        constant static lngt 1
        idx <field_decl 0x7f57488ed7b8 __u6_addr8 type <array_type
0x7f57488e4b28>
            TI file /usr/include/netinet/in.h line 201 col 10 size <integer_cst
0x7f5748fc60a0 128> unit size <integer_cst 0x7f5748fc60c0 16>
            align 8 offset_align 128 offset <integer_cst 0x7f5748fc6060 0> bit
offset <integer_cst 0x7f5748fc60e0 0> context <union_type 0x7f57488e4d20> chain
<field_decl 0x7f57488ed850 __u6_addr16>>
        val <constructor 0x7f5748974750 type <array_type 0x7f57488e4b28>
            constant static lngt 16 idx <integer_cst 0x7f5748fc60e0 0>
            val <integer_cst 0x7f5748fc6220 constant 0>
            idx <integer_cst 0x7f5748fc6680 constant 1> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f57490695c0 constant 2> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f5749139040 constant 3> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f57490695a0 constant 4> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f5749139180 constant 5> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f5749139240 constant 6> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f57491392e0 constant 7> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f5748fc61e0 constant 8> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f5749139400 constant 9> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f57491394a0 constant 10> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f5749139520 constant 11> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f57491395a0 constant 12> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f5749139640 constant 13> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f57491396c0 constant 14> val <integer_cst
0x7f5748fc6220 0>
            idx <integer_cst 0x7f5749139740 constant 15> val <integer_cst
0x7f5748fc6220 0>>>>

tail -n7 nxagent.wpa.000i.cgraph:

in6addr_any/8509 (in6addr_any) @0x7f574517de38
  Type: variable definition analyzed alias
  Visibility: externally_visible prevailing_def public weak
  References: local_in6addr_any/8508 (alias)
  Referring: _XSERVTransSocketINETCreateListener/8525
(read)_FontTransSocketINETCreateListener/63329 (read)
  Read from file: os/libos.a
  Availability: available
  Varpool flags: initialized read-only

cgraph dump:
https://drive.google.com/file/d/0B0pisUJ80pO1YjVsOU15eWJ5c1k/edit?usp=sharing

source code snippet:
/*
 * This provides compatibility for apps linked against system libraries
 * that don't have IPv6 support.
 */
#if defined(IPv6) && defined(AF_INET6)
static const struct in6_addr local_in6addr_any = IN6ADDR_ANY_INIT;
#pragma weak in6addr_any = local_in6addr_any
#ifndef __USLC__
#pragma weak getaddrinfo
#endif
static int haveIPv6 = 1;
#endif

[Bug c++/60820] ice in ctor_for_folding, at varpool.c:291

[mliska at suse dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

--- Comment #1 from Martin Liška <mliska at suse dot cz> ---
testcase:

cat a.c:
#include <netinet/in.h>
#include <stdio.h>

static const struct in6_addr local_in6addr_any = IN6ADDR_ANY_INIT;
#pragma weak in6addr_any = local_in6addr_any

__attribute__ ((used))
void foo()
{
  fprintf (stderr, "v1: %p, v2: %p\n", &local_in6addr_any, &in6addr_any);
}

gcc -flto -O2 -c a.c -o a.o
gcc -flto -O2 -c a.c -o b.o
gcc -flto -O2 a.o b.o
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/60100] warning disappears when preprocessed source is compiled
Date: Fri, 11 Apr 2014 13:44:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id`100

--- Comment #10 from lavr at ncbi dot nlm.nih.gov ---
> I guess also a dup of PR57201.

While I can agree these cases (and the one mentioned within PR57201) look
similar, the gravity of the disappearing warning in case of a mismatched type
is more severe than an unused variable or no-effect code...

[Bug lto/60820] [4.9 Regression] ice in ctor_for_folding, at varpool.c:291

[trippels at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |4.7.3, 4.8.3
   Last reconfirmed|                            |2014-04-11
          Component|c++                         |lto
                 CC|                            |trippels at gcc dot gnu.org
     Ever confirmed|0                           |1
            Summary|ice in ctor_for_folding, at |[4.9 Regression] ice in
                   |varpool.c:291               |ctor_for_folding, at
                   |                            |varpool.c:291
   Target Milestone|---                         |4.9.0
      Known to fail|                            |4.9.0

--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
copying a.c to b.c and renaming foo() to bar() makes the testcase valid I
guess.

[Bug lto/60820] [4.9/4.10 Regression] ice in ctor_for_folding, at varpool.c:291

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu.org
           Assignee|unassigned at gcc dot gnu.org      |hubicka at gcc dot gnu.org

--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
mine.

[Bug lto/60820] [4.9/4.10 Regression] ice in ctor_for_folding, at varpool.c:291

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I am testing the following
Index: /aux/hubicka/trunk-test/gcc/varpool.c
===================================================================
--- /aux/hubicka/trunk-test/gcc/varpool.c       (revision 209170)
+++ /aux/hubicka/trunk-test/gcc/varpool.c       (working copy)
@@ -166,7 +166,9 @@ varpool_remove_node (varpool_node *node)
   /* Because we remove references from external functions before final
compilation,
      we may end up removing useful constructors.
      FIXME: We probably want to trace boundaries better.  */
-  if ((init = ctor_for_folding (node->decl)) == error_mark_node)
+  if (cgraph_state == CGRAPH_LTO_STREAMING)
+    ;
+  else if ((init = ctor_for_folding (node->decl)) == error_mark_node)
     varpool_remove_initializer (node);
   else
     DECL_INITIAL (node->decl) = init;

[Bug lto/60820] [4.9/4.10 Regression] ice in ctor_for_folding, at varpool.c:291

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Mon Apr 14 17:53:34 2014
New Revision: 209389

URL: http://gcc.gnu.org/viewcvs?rev=209389&root=gcc&view=rev
Log:

    PR lto/60820
    * varpool.c (varpool_remove_node): Do not alter decls when streaming.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/varpool.c

[Bug lto/60820] [4.9/4.10 Regression] ice in ctor_for_folding, at varpool.c:291

[mliska at suse dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

--- Comment #6 from Martin Liška <mliska at suse dot cz> ---
Patch works for me for net-misc/nx package. Will you merge the patch to gcc-4.9
branch?
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Subject: [Bug tree-optimization/60844] New: [4.9/4.10 Regression] ICE in reassoc_stmt_dominates_stmt_p
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id`844

            Bug ID: 60844
           Summary: [4.9/4.10 Regression] ICE in
                    reassoc_stmt_dominates_stmt_p
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org

void
foo (int *x, int y, int z)
{
  int b, c = x[0], d = x[1];
  for (b = 0; b < 1; b++)
    {
      int e = (y ? 1 : 0) | (d ? 2 : 0) | (z ? 1 : 0);
      e |= (c ? 2 : 0) | ((1 >> b) ? 1 : 0);
      x[2 + b] = e;
    }
}

ICEs at -O2 -g -mtune=atom on x86_64/i686, starting with r203979.

[Bug lto/60820] [4.9/4.10 Regression] ice in ctor_for_folding, at varpool.c:291

[hubicka at ucw dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

--- Comment #7 from Jan Hubicka <hubicka at ucw dot cz> ---
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820
> 
> --- Comment #6 from Martin Liška <mliska at suse dot cz> ---
> Patch works for me for net-misc/nx package. Will you merge the patch to gcc-4.9
> branch?
Richard approved it for 4.9.1

Honza
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Subject: [Bug c++/60852] boost::has_complement of enum class does not compile
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--- Comment #1 from Nevin Liber <nevin at eviloverlord dot com> ---
Also filed this as a Boost bug at https://svn.boost.org/trac/boost/ticket/9913

[Bug lto/60820] [4.9/4.10 Regression] ice in ctor_for_folding, at varpool.c:291

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

--- Comment #8 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Thu Apr 17 02:32:26 2014
New Revision: 209460

URL: http://gcc.gnu.org/viewcvs?rev=209460&root=gcc&view=rev
Log:

    PR lto/60820
    * gcc.dg/lto/pr60820_0.c: New testcase.
    * gcc.dg/lto/pr60820_1.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/lto/pr60820_0.c
    trunk/gcc/testsuite/gcc.dg/lto/pr60820_1.c
Modified:
    trunk/gcc/testsuite/ChangeLog

[Bug lto/60820] [4.9/4.10 Regression] ice in ctor_for_folding, at varpool.c:291

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.9.0                       |4.9.1

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.9.0 has been released

[Bug lto/60820] [4.9/4.10 Regression] ice in ctor_for_folding, at varpool.c:291

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

--- Comment #10 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Wed May 21 02:32:00 2014
New Revision: 210671

URL: http://gcc.gnu.org/viewcvs?rev=210671&root=gcc&view=rev
Log:
    PR lto/60820
    * varpool.c (varpool_remove_node): Do not alter decls when streaming.

Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/varpool.c

[Bug lto/60820] [4.9/4.10 Regression] ice in ctor_for_folding, at varpool.c:291

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60820

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

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

--- Comment #11 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
fixed.