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* [Bug c/98592] New: ICE in gimple_canonical_types_compatible_p while formatting a MEM_REF
@ 2021-01-07 22:42 msebor at gcc dot gnu.org
  2021-01-08  8:35 ` [Bug c/98592] " rguenth at gcc dot gnu.org
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: msebor at gcc dot gnu.org @ 2021-01-07 22:42 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98592

            Bug ID: 98592
           Summary: ICE in gimple_canonical_types_compatible_p while
                    formatting a MEM_REF
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: msebor at gcc dot gnu.org
  Target Milestone: ---

With the ICEs reported in pr98578 and pr95768 both fixed, the latest trunk now
fails with another ICE in the same code on the test case below.  Apparently,
gimple_canonical_types_compatible_p() doesn't like mixed array and scalar types
(t1 is an int, t2 is an int array).

$ cat t.c && gcc -O2 -S -Wall -fdump-tree-uninit=/dev/stdout t.c
void f (int);

void g (int n)
{
  int a[n][3];
  f (((*(int(*)[4])&a[1][2]))[3]);

}

;; Function g (g, funcdef_no=0, decl_uid=1945, cgraph_uid=1, symbol_order=0)

‘
during GIMPLE pass: uninit
dump file: /dev/stdout



EMERGENCY DUMP:

void g (int n)
{
  int[0:D.1950][3] * a.1;
  sizetype _1;
  int _6;
  sizetype _7;

  <bb 2> [local count: 1073741824]:
  _1 = (sizetype) n_2(D);
  _7 = _1 * 12;
  a.1_9 = __builtin_alloca_with_align (_7, 32);
  _6 = MEM[(int[4] *)a.1_9 + 20B][3];
  f (_6);
  return;

}


In function ‘g’:
in gimple_canonical_types_compatible_p, at tree.c:14367
    3 | void g (int n)
      |      ^
0x195c249 gimple_canonical_types_compatible_p(tree_node const*, tree_node
const*, bool)
        /src/gcc/master/gcc/tree.c:14366
0xb3616f print_mem_ref
        /src/gcc/master/gcc/c-family/c-pretty-print.c:1869
0xb3686d c_pretty_printer::unary_expression(tree_node*)
        /src/gcc/master/gcc/c-family/c-pretty-print.c:2005
0xb380fd c_pretty_printer::expression(tree_node*)
        /src/gcc/master/gcc/c-family/c-pretty-print.c:2508
0xb35922 c_pretty_printer::postfix_expression(tree_node*)
        /src/gcc/master/gcc/c-family/c-pretty-print.c:1729
0xb3517a c_pretty_printer::postfix_expression(tree_node*)
        /src/gcc/master/gcc/c-family/c-pretty-print.c:1587
0xb380da c_pretty_printer::expression(tree_node*)
        /src/gcc/master/gcc/c-family/c-pretty-print.c:2493
0xa31fa2 c_tree_printer
        /src/gcc/master/gcc/c/c-objc-common.c:317
0x2883a45 pp_format(pretty_printer*, text_info*)
        /src/gcc/master/gcc/pretty-print.c:1475
0x2859d96 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
        /src/gcc/master/gcc/diagnostic.c:1216
0x285a3e7 diagnostic_impl
        /src/gcc/master/gcc/diagnostic.c:1366
0x285aca3 warning_at(unsigned int, int, char const*, ...)
        /src/gcc/master/gcc/diagnostic.c:1503
0x180d584 maybe_warn_operand
        /src/gcc/master/gcc/tree-ssa-uninit.c:418
0x180e15d warn_uninitialized_vars
        /src/gcc/master/gcc/tree-ssa-uninit.c:657
0x1813575 execute
        /src/gcc/master/gcc/tree-ssa-uninit.c:3019
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-01-12 21:38 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-01-07 22:42 [Bug c/98592] New: ICE in gimple_canonical_types_compatible_p while formatting a MEM_REF msebor at gcc dot gnu.org
2021-01-08  8:35 ` [Bug c/98592] " rguenth at gcc dot gnu.org
2021-01-08 19:56 ` msebor at gcc dot gnu.org
2021-01-12 17:48 ` [Bug c/98592] [11 Regression] " msebor at gcc dot gnu.org
2021-01-12 20:03 ` cvs-commit at gcc dot gnu.org
2021-01-12 21:38 ` msebor at gcc dot gnu.org

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