[Bug c/79413] New: ICE in make_ssa_name_fn, at tree-ssanames.c:265

["gerhard dot steinmetz dot fortran at t-online dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79413

            Bug ID: 79413
           Summary: ICE in make_ssa_name_fn, at tree-ssanames.c:265
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gerhard.steinmetz.fortran@t-online.de
  Target Milestone: ---

Seen with test-version 7 at -Os, -O2 or higher :


$ cat z1.c
void fn1 ()
{
  typeof (int [1/0]) a;
}
void fn2 ()
{
  fn1();
}


$ gcc-6 -O2 -c z1.c
$ gcc-7-20170205 -O1 -c z1.c
$ gcc-7-20170205 -O2 -c z1.c
z1.c: In function 'fn2':
z1.c:7:3: internal compiler error: Segmentation fault
   fn1();
   ^~~~~
0xbf633f crash_signal
        ../../gcc/toplev.c:333
0xe150aa make_ssa_name_fn(function*, tree_node*, gimple*, unsigned int)
        ../../gcc/tree-ssanames.c:265
0xc704d6 make_ssa_name
        ../../gcc/tree-ssanames.h:113
0xc704d6 remap_ssa_name
        ../../gcc/tree-inline.c:238
0xc76d1c copy_tree_body_r(tree_node**, int*, void*)
        ../../gcc/tree-inline.c:1081
0xec2222 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
        ../../gcc/tree.c:11796
0xec2676 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
        ../../gcc/tree.c:12113
0xc6eba0 remap_type_1
        ../../gcc/tree-inline.c:565
0xc6fac1 remap_type(tree_node*, copy_body_data*)
        ../../gcc/tree-inline.c:593
0xc6e456 remap_decl(tree_node*, copy_body_data*)
        ../../gcc/tree-inline.c:370
0xc6fbfd remap_decls
        ../../gcc/tree-inline.c:642
0xc70e60 remap_block
        ../../gcc/tree-inline.c:700
0xc70fa1 remap_blocks
        ../../gcc/tree-inline.c:721
0xc79823 expand_call_inline
        ../../gcc/tree-inline.c:4617
0xc7b834 gimple_expand_calls_inline
        ../../gcc/tree-inline.c:4868
0xc7b834 optimize_inline_calls(tree_node*)
        ../../gcc/tree-inline.c:5008
0x1323321 early_inliner(function*)
        ../../gcc/ipa-inline.c:2721