Add LJ_GC64 mode: 64 bit GC object references.

Actually NaN tagging with 47 bit pointers and 13+4 bit tags.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/lj_jit.h b/src/lj_jit.h
index 4246e9db..ed92f62d 100644
--- a/src/lj_jit.h
+++ b/src/lj_jit.h
@@ -213,6 +213,9 @@ typedef struct GCtrace {
   uint8_t topslot;      /* Top stack slot already checked to be allocated. */
   uint8_t linktype;     /* Type of link. */
   IRRef nins;           /* Next IR instruction. Biased with REF_BIAS. */
+#if LJ_GC64
+  uint32_t unused_gc64;
+#endif
   GCRef gclist;
   IRIns *ir;            /* IR instructions/constants. Biased with REF_BIAS. */
   IRRef nk;             /* Lowest IR constant. Biased with REF_BIAS. */