Fast forward to sync public repo.

Compile math.sinh(), math.cosh(), math.tanh() and math.random().
Compile various io.*() functions.
Drive the GC forward on string allocations in the parser.
Improve KNUM fuse vs. load heuristics.
Add abstract C call handling to IR.

src/lj_lib.c

@@ -152,7 +152,7 @@ lua_Number lj_lib_checknum(lua_State *L, int narg)
 {
   TValue *o = L->base + narg-1;
   if (!(o < L->top &&
-	(tvisnum(o) || (tvisstr(o) && lj_str_numconv(strVdata(o), o)))))
+	(tvisnum(o) || (tvisstr(o) && lj_str_tonum(strV(o), o)))))
     lj_err_argt(L, narg, LUA_TNUMBER);
   return numV(o);
 }