Major redesign of function call handling.

Drop call gates. Use function headers, dispatched like bytecodes.
Emit BC_FUNCF/BC_FUNCV bytecode at PC 0 for all Lua functions.
C functions and ASM fast functions get extra bytecodes.
Modify internal calling convention: new base in BASE (formerly in RA).
Can now use better C function wrapper semantics (dynamic on/off).
Prerequisite for call hooks with zero-overhead if disabled.
Prerequisite for compiling recursive calls.
Prerequisite for efficient 32/64 bit prototype guards.

1 files changed, 13 insertions, 5 deletions

diff --git a/src/lib_base.c b/src/lib_base.c
index 032d5bcc..e85b7264 100644
--- a/src/lib_base.c
+++ b/src/lib_base.c
@@ -22,7 +22,9 @@
 #include "lj_tab.h"
 #include "lj_meta.h"
 #include "lj_state.h"
+#include "lj_bc.h"
 #include "lj_ff.h"
+#include "lj_dispatch.h"
 #include "lj_ctype.h"
 #include "lj_lib.h"
 
@@ -521,19 +523,25 @@ void LJ_FASTCALL lj_ffh_coroutine_wrap_err(lua_State *L, lua_State *co)
     lj_err_run(L);
 }
 
+/* Forward declaration. */
+static void setpc_wrap_aux(lua_State *L, GCfunc *fn);
+
 LJLIB_CF(coroutine_wrap)
 {
-  GCfunc *fn;
   lj_cf_coroutine_create(L);
-  lua_pushcclosure(L, lj_ffh_coroutine_wrap_aux, 1);
-  fn = funcV(L->top-1);
-  fn->c.gate = lj_ff_coroutine_wrap_aux;
-  fn->c.ffid = FF_coroutine_wrap_aux;
+  lj_lib_pushcc(L, lj_ffh_coroutine_wrap_aux, FF_coroutine_wrap_aux, 1);
+  setpc_wrap_aux(L, funcV(L->top-1));
   return 1;
 }
 
 #include "lj_libdef.h"
 
+/* Fix the PC of wrap_aux. Really ugly workaround. */
+static void setpc_wrap_aux(lua_State *L, GCfunc *fn)
+{
+  setmref(fn->c.pc, &L2GG(L)->bcff[lj_lib_init_coroutine[1]+2]);
+}
+
 /* ------------------------------------------------------------------------ */
 
 static void newproxy_weaktable(lua_State *L)