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Add special bytecodes for builtins.

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BC_ISTYPE, BC_ISNUM: fast type checks/coercions.
BC_TGETR, BC_TSETR: fast rawgeti/rawseti, no type checks for table/key.
This commit is contained in:
Mike Pall
2013-02-23 02:09:19 +01:00
parent b359ce804b
commit 73ef845fca
16 changed files with 614 additions and 38 deletions
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16
src/lj_record.c
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@@ -1826,6 +1826,18 @@ void lj_record_ins(jit_State *J)
J->maxslot = bc_a(pc[1]); /* Shrink used slots. */
break;
case BC_ISTYPE: case BC_ISNUM:
/* These coercions need to correspond with lj_meta_istype(). */
if (LJ_DUALNUM && rc == ~LJ_TNUMX+1)
ra = lj_opt_narrow_toint(J, ra);
else if (rc == ~LJ_TNUMX+2)
ra = lj_ir_tonum(J, ra);
else if (rc == ~LJ_TSTR+1)
ra = lj_ir_tostr(J, ra);
/* else: type specialization suffices. */
J->base[bc_a(ins)] = ra;
break;
/* -- Unary ops --------------------------------------------------------- */
case BC_NOT:
@@ -1937,6 +1949,10 @@ void lj_record_ins(jit_State *J)
ix.idxchain = LJ_MAX_IDXCHAIN;
rc = lj_record_idx(J, &ix);
break;
case BC_TGETR: case BC_TSETR:
ix.idxchain = 0;
rc = lj_record_idx(J, &ix);
break;
case BC_TNEW:
rc = rec_tnew(J, rc);