[Bug ipa/84658] [7/8 Regression] -O3 -fmerge-all-constants causes incorrect for-each loop generation.

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84658

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Adjusted testcase for the testsuite:
// PR ipa/84658
// { dg-do run }
// { dg-options "-O3 -fmerge-all-constants" }
// { dg-output "foo 0, 1, 2, 3, 4, 5, 8, 15, 16, 17, 512, 1020, 1021, 1022,
1023, 1024, end.*" }
// { dg-output "bar 0, 1, 2, 3, 4, 5, 8, 15, 16, 17, 512, 1020, 1021, 1022,
1023, 1024, end" }

extern "C" int printf (const char *, ...);

void
foo ()
{
  const int a[] = { 0, 1, 2, 3, 4, 5, 8, 15, 16, 17, 512, 1020, 1021, 1022,
1023, 1024 };
  for (int b : a)
    printf ("%d, ", b);
}

void
bar ()
{
  const int a[] = { 0, 1, 2, 3, 4, 5, 8, 15, 16, 17, 512, 1020, 1021, 1022,
1023, 1024 };
  for (int b : a)
    printf ("%d, ", b);
}

int
main ()
{
  printf ("foo ");
  foo ();
  printf ("end\nbar ");
  bar ();
  printf ("end\n");
}