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Fix tailcalls from vararg functions.

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This commit is contained in:
Mike Pall 2010-09-13 00:55:05 +02:00
parent 52f75e9a5c
commit e32f7d96c1
1 changed files with 8 additions and 1 deletions
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9
src/lj_record.c
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@ -520,6 +520,14 @@ static void rec_call(jit_State *J, BCReg func, ptrdiff_t nargs)
static void rec_tailcall(jit_State *J, BCReg func, ptrdiff_t nargs)
{
rec_call_setup(J, func, nargs);
if (frame_isvarg(J->L->base - 1)) {
BCReg cbase = (BCReg)frame_delta(J->L->base - 1);
if (--J->framedepth < 0)
lj_trace_err(J, LJ_TRERR_NYIRETL);
J->baseslot -= (BCReg)cbase;
J->base -= cbase;
func += cbase;
}
/* Move func + args down. */
memmove(&J->base[-1], &J->base[func], sizeof(TRef)*(J->maxslot+1));
/* Note: the new TREF_FRAME is now at J->base[-1] (even for slot #0). */
@ -572,7 +580,6 @@ static void rec_ret(jit_State *J, BCReg rbase, ptrdiff_t gotresults)
}
if (frame_isvarg(frame)) {
BCReg cbase = (BCReg)frame_delta(frame);
lua_assert(J->framedepth != 1);
if (--J->framedepth < 0) /* NYI: return of vararg func to lower frame. */
lj_trace_err(J, LJ_TRERR_NYIRETL);
lua_assert(J->baseslot > 1);