1 files changed, 2 insertions, 1 deletions

diff --git a/src/lj_opt_split.c b/src/lj_opt_split.c
index 1cee5093..4a1b0a6e 100644
--- a/src/lj_opt_split.c
+++ b/src/lj_opt_split.c
@@ -471,7 +471,8 @@ static void split_ir(jit_State *J)
         }
 #endif
         else if (st == IRT_I64 || st == IRT_U64) {  /* 64/64 bit cast. */
-          /* Drop cast, since assembler doesn't care. */
+          /* Drop cast, since assembler doesn't care. But fwd both parts. */
+          hi = hiref;
           goto fwdlo;
         } else if ((ir->op2 & IRCONV_SEXT)) {  /* Sign-extend to 64 bit. */
           IRRef k31 = lj_ir_kint(J, 31);