[Bug c/98715] New: ICE in make_decl_rtl, at varasm.c

[alserkli at inbox dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98715

            Bug ID: 98715
           Summary: ICE in make_decl_rtl, at varasm.c
           Product: gcc
           Version: 11.0
               URL: https://godbolt.org/z/z763xG
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: alserkli at inbox dot ru
  Target Milestone: ---

<https://godbolt.org/z/z763xG>:

void f(int n) {
    int a[n][n] = {{}};
}

gives on trunk (also gcc 4.9.0, but not 4.8.5):

during RTL pass: expand
<source>: In function 'void f(int)':
<source>:2:22: internal compiler error: in make_decl_rtl, at varasm.c:1427
    2 |     int a[n][n] = {{}};
      |                      ^
0x1cd4199 internal_error(char const*, ...)
        ???:0
0x6b4a01 fancy_abort(char const*, int, char const*)
        ???:0
0x13d7265 make_decl_rtl(tree_node*)
        ???:0
0xc42451 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        ???:0
0xc41a1e expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        ???:0
0xc4f0d1 store_expr(tree_node*, rtx_def*, int, bool, bool)
        ???:0