[Bug lto/97133] New: [11 Regression] ICE: tree code 'bind_expr' is not supported in LTO streams

[Bug lto/97133] New: [11 Regression] ICE: tree code 'bind_expr' is not supported in LTO streams

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97133

            Bug ID: 97133
           Summary: [11 Regression] ICE: tree code 'bind_expr' is not
                    supported in LTO streams
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

gcc-11.0.0-alpha20200920 snapshot (g:363e7755f227656684c8e284307ceee451503ca4)
ICEs when compiling gcc/testsuite/gcc.dg/pr88701.c w/ -flto:

% gcc-11.0.0 -flto -c gcc/testsuite/gcc.dg/pr88701.c
during IPA pass: modref
gcc/testsuite/gcc.dg/pr88701.c:18:1: internal compiler error: tree code
'bind_expr' is not supported in LTO streams
   18 | }
      | ^
0xc3d22c lto_write_tree
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/lto-streamer-out.c:554
0xc3d22c lto_output_tree_1
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/lto-streamer-out.c:592
0xc45b49 DFS::DFS(output_block*, tree_node*, bool, bool, bool)
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/lto-streamer-out.c:892
0xc46b30 lto_output_tree(output_block*, tree_node*, bool, bool)
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/lto-streamer-out.c:1853
0xc47d7d streamer_write_chain
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/lto-streamer-out.c:2370
0xc47d7d output_function
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/lto-streamer-out.c:2408
0xc47d7d lto_output()
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/lto-streamer-out.c:2792
0xcc6611 write_lto
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/passes.c:2621
0xcc6611 ipa_write_summaries_1
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/passes.c:2685
0xcc6611 ipa_write_summaries()
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/passes.c:2740
0x96616d ipa_passes
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/cgraphunit.c:2689
0x96616d symbol_table::compile()
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/cgraphunit.c:2776
0x968222 symbol_table::compile()
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/cgraphunit.c:2756
0x968222 symbol_table::finalize_compilation_unit()
       
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200920/work/gcc-11-20200920/gcc/cgraphunit.c:3021

[Bug ipa/97133] [11 Regression] ICE: tree code 'bind_expr' is not supported in LTO streams

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97133

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|lto                         |ipa
                 CC|                            |hubicka at gcc dot gnu.org
   Target Milestone|---                         |11.0
   Last reconfirmed|                            |2020-09-21
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  Not sure why modref runs at -O0 at all.

[Bug ipa/97133] [11 Regression] ICE: tree code 'bind_expr' is not supported in LTO streams

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97133

--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
Likely a duplicate of PR97172.

[Bug ipa/97133] [11 Regression] ICE: tree code 'bind_expr' is not supported in LTO streams

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97133

--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
modref is a stale infoa (streaming happens after running the ipa passes and
moref is last).  It is Maritn Sebor's change.

[Bug lto/97133] [11 Regression] ICE: tree code 'bind_expr' is not supported in LTO streams

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97133

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|NEW                         |RESOLVED
          Component|ipa                         |lto

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
This is the same ICE as in PR97172:

  static void
  lto_write_tree (struct output_block *ob, tree expr, bool ref_p)
  {
    if (!lto_is_streamable (expr))
      internal_error ("tree code %qs is not supported in LTO streams",
                    get_tree_code_name (TREE_CODE (expr)));


and EXPR is BIND_EXPR.  It's emitted by the C front end for the VLA parameter
in the definition of

int
qux (int n, int a[(int (*)[n]) { 0 } == 0])

like so:

 <parm_decl 0x7fffea94c280 a
    type <pointer_type 0x7fffea8189d8
        type <integer_type 0x7fffea8105e8 int public SI
            size <integer_cst 0x7fffea7f7f18 constant 32>
            unit-size <integer_cst 0x7fffea7f7f30 constant 4>
            align:32 warn_if_not_align:0 symtab:0 alias-set 2 canonical-type
0x7fffea8105e8 precision:32 min <integer_cst 0x7fffea7f7ed0 -2147483648> max
<integer_cst 0x7fffea7f7ee8 2147483647>
            pointer_to_this <pointer_type 0x7fffea8189d8>>
        public unsigned DI
        size <integer_cst 0x7fffea7f7cd8 constant 64>
        unit-size <integer_cst 0x7fffea7f7cf0 constant 8>
        align:64 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7fffea8189d8>
    used unsigned read decl_0 DI
/src/gcc/master/gcc/testsuite/gcc.dg/pr88701.c:15:17 size <integer_cst
0x7fffea7f7cd8 64> unit-size <integer_cst 0x7fffea7f7cf0 8>
    align:64 warn_if_not_align:0 context <function_decl 0x7fffea928a00 qux>
    attributes <tree_list 0x7fffea94d8e8
        purpose <identifier_node 0x7fffea937910 arg spec>
        value <tree_list 0x7fffea94d898
            value <string_cst 0x7fffea936860 constant "[$]\000">
            chain <tree_list 0x7fffea94d870
                value <eq_expr 0x7fffea94d758 type <integer_type 0x7fffea8105e8
int>
                    side-effects
                    arg:0 <c_maybe_const_expr 0x7fffea94d730 type <pointer_type
0x7fffea930c78>
                        side-effects
                        arg:0 <compound_expr 0x7fffea94d708 type <void_type
0x7fffea810f18 void>
                            side-effects arg:1 <bind_expr 0x7fffea949330>>
                        arg:1 <compound_literal_expr 0x7fffea936780 type
<pointer_type 0x7fffea930c78>
                            side-effects arg:0 <decl_expr 0x7fffea936760>>>
                    arg:1 <integer_cst 0x7fffea94f030 constant 0>
                    /src/gcc/master/gcc/testsuite/gcc.dg/pr88701.c:15:38 start:
/src/gcc/master/gcc/testsuite/gcc.dg/pr88701.c:15:32 finish:
/src/gcc/master/gcc/testsuite/gcc.dg/pr88701.c:15:41>>>> arg-type <pointer_type
0x7fffea8189d8>>


lto_is_streamable() is defined to return false for BIND_EXPR (and SSA_NAME)
like so:

/* Return true if EXPR is a tree node that can be written to disk.  */

static inline bool
lto_is_streamable (tree expr)
{
  enum tree_code code = TREE_CODE (expr);

  /* Notice that we reject SSA_NAMEs as well.  We only emit the SSA
     name version in lto_output_tree_ref (see output_ssa_names).  */
  return !is_lang_specific (expr)
         && code != SSA_NAME
         && code != LANG_TYPE
         && code != MODIFY_EXPR
         && code != INIT_EXPR
         && code != TARGET_EXPR
         && code != BIND_EXPR
         && code != WITH_CLEANUP_EXPR
         && code != STATEMENT_LIST
         && (code == CASE_LABEL_EXPR
             || code == DECL_EXPR
             || TREE_CODE_CLASS (code) != tcc_statement);
}

*** This bug has been marked as a duplicate of bug 97172 ***