[Bug middle-end/69369] New: [6 Regression] internal compiler error: in remove_unreachable_nodes, at ipa.c:457

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69369

            Bug ID: 69369
           Summary: [6 Regression] internal compiler error: in
                    remove_unreachable_nodes, at ipa.c:457
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: hubicka at ucw dot cz
  Target Milestone: ---

On x86, r232560 caused:

[hjl@gnu-6 gcc]$ cat
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/pr65184.c
/* { dg-do compile } */
/* { dg-require-effective-target mpx } */
/* { dg-options "-O2 -mabi=ms -fcheck-pointer-bounds -mmpx" } */

void
foo (int *a)
{
  if (a[0] != a[1] * 2333)
    __builtin_abort ();
}

void
bar (int *a)
{
  if (a[0] != a[1] * 2333)
    __builtin_abort ();
}
[hjl@gnu-6 gcc]$ ./xgcc -B./
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/pr65184.c -S
-O2  -fcheck-pointer-bounds -mmpx 
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/pr65184.c:17:1:
internal compiler error: in remove_unreachable_nodes, at ipa.c:457
 }
 ^

0xbde2b8 symbol_table::remove_unreachable_nodes(_IO_FILE*)
        /export/gnu/import/git/sources/gcc/gcc/ipa.c:457
0xd2389c execute_todo
        /export/gnu/import/git/sources/gcc/gcc/passes.c:2024
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-6 gcc]$