[prange] Reword dispatch error message

After reading the ICE for the PR, it's obvious the error message is
rather cryptic.  This makes it less so.

gcc/ChangeLog:

	* range-op.cc (range_op_handler::discriminator_fail): Reword error
	message.

diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index 245385fe48768ef64495218d53e51a9121b276ff..e00136479a6db98784fecd9cb7b7dd02a17cdec7 100644 (file)
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -197,7 +197,8 @@ range_op_handler::discriminator_fail (const vrange &r1,
   gcc_checking_assert (r1.m_discriminator < sizeof (name) - 1);
   gcc_checking_assert (r2.m_discriminator < sizeof (name) - 1);
   gcc_checking_assert (r3.m_discriminator < sizeof (name) - 1);
-  fprintf (stderr, "DISCRIMINATOR FAIL.  Dispatch ====> RO_%c%c%c <====\n",
+  fprintf (stderr,
+          "Unsupported operand combination in dispatch: RO_%c%c%c\n",
           name[r1.m_discriminator],
           name[r2.m_discriminator],
           name[r3.m_discriminator]);