[Bug ipa/114985] [15 regression] internal compiler error: in discriminator_fail during stage2

["aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114985

--- Comment #17 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
(In reply to Martin Jambor from comment #16)
> I'll have look, hopefully on Monday.

Thanks Martin.

To reproduce the problem:

1. Revert this patch:

commit d7bb8eaade3cd3aa70715c8567b4d7b08098e699 (master, clean)
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Fri May 10 00:29:13 2024 +0200

    Revert: "Enable prange support." [PR114985]

2. Trap on pointer mismatches:

diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index 000ec802e66..c14b72c19de 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -52,7 +52,7 @@ along with GCC; see the file COPYING3.  If not see
 // Set to 1 to trap on range-op entries that cannot handle the pointer
 // combination being requested.  This is a temporary sanity check to
 // aid in debugging, and will be removed later in the release cycle.
-#define TRAP_ON_UNHANDLED_POINTER_OPERATORS 0
+#define TRAP_ON_UNHANDLED_POINTER_OPERATORS 1

 // Instantiate the operators which apply to multiple types here.

I will also attach a preprocessed file to reproduce the problem on ppc64le that
can save you some time.