[Bug target/106815] [13 Regression] ICE: in riscv_excess_precision, at config/riscv/riscv.cc:5967 with -fexcess-precision=16 on any input

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106815

palmer at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |palmer at gcc dot gnu.org
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2022-09-03

--- Comment #1 from palmer at gcc dot gnu.org ---
Thanks.  I'm pretty sure all we need is

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 675d92c0961..9b6d3e95b1b 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -5962,6 +5962,7 @@ riscv_excess_precision (enum excess_precision_type type)
       return (TARGET_ZFH ? FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16
                         : FLT_EVAL_METHOD_PROMOTE_TO_FLOAT);
     case EXCESS_PRECISION_TYPE_IMPLICIT:
+    case EXCESS_PRECISION_TYPE_FLOAT16:
       return FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16;
     default:
       gcc_unreachable ();

I'll send it out assuming it passes the tests.