Avoid strict aliasing issues.

diff --git a/src/lj_snap.c b/src/lj_snap.c
index 1e6f10d0ee1fd681965420c37b906a794394c30a..bef7abc983081f0d08b7589d88c622d8336ad90c 100644 (file)
--- a/src/lj_snap.c
+++ b/src/lj_snap.c
@@ -625,13 +625,13 @@ static void snap_restoredata(GCtrace *T, ExitState *ex,
   IRIns *ir = &T->ir[ref];
   RegSP rs = ir->prev;
   int32_t *src;
-  union { uint64_t u64; float f; } tmp;
+  uint64_t tmp;
   if (irref_isk(ref)) {
     if (ir->o == IR_KNUM || ir->o == IR_KINT64) {
       src = mref(ir->ptr, int32_t);
     } else if (sz == 8) {
-      tmp.u64 = (uint64_t)(uint32_t)ir->i;
-      src = (int32_t *)&tmp.u64;
+      tmp = (uint64_t)(uint32_t)ir->i;
+      src = (int32_t *)&tmp;
     } else {
       src = &ir->i;
     }
@@ -655,8 +655,8 @@ static void snap_restoredata(GCtrace *T, ExitState *ex,
        src = (int32_t *)&ex->fpr[r-RID_MIN_FPR];
 #if LJ_TARGET_PPC
        if (sz == 4) {  /* PPC FPRs are always doubles. */
-         tmp.f = (float)*(double *)src;
-         src = (int32_t *)&tmp.f;
+         *(float *)dst = (float)*(double *)src;
+         return;
        }
 #else
        if (LJ_BE && sz == 4) src++;