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FFI: Rename IR_CNEWP to IR_CNEWI and use it to box 64 bit integers.

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Generates smaller IR and DCE eliminates many intermediate boxes.
Needs allocation sinking to eliminate the boxes kept alive by PHIs.
This commit is contained in:
Mike Pall
2011-02-03 04:13:51 +01:00
parent 1027018b21
commit df65b8b419
5 changed files with 142 additions and 84 deletions
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29
src/lj_opt_fold.c
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@@ -154,7 +154,7 @@ typedef IRRef (LJ_FASTCALL *FoldFunc)(jit_State *J);
#define gcstep_barrier(J, ref) \
((ref) < J->chain[IR_LOOP] && \
(J->chain[IR_SNEW] || J->chain[IR_TNEW] || J->chain[IR_TDUP] || \
J->chain[IR_CNEW] || J->chain[IR_CNEWP] || J->chain[IR_TOSTR]))
J->chain[IR_CNEW] || J->chain[IR_CNEWI] || J->chain[IR_TOSTR]))
/* -- Constant folding for FP numbers ------------------------------------- */
@@ -307,7 +307,7 @@ static uint64_t kfold_int64arith(uint64_t k1, uint64_t k2, IROp op)
case IR_BOR: k1 |= k2; break;
case IR_BXOR: k1 ^= k2; break;
#endif
default: lua_assert(0); break;
default: UNUSED(k2); lua_assert(0); break;
}
return k1;
}
@@ -1765,18 +1765,28 @@ LJFOLDF(fload_cdata_typeid_kgc)
return NEXTFOLD;
}
LJFOLD(FLOAD CNEW IRFL_CDATA_TYPEID)
LJFOLD(FLOAD CNEWP IRFL_CDATA_TYPEID)
LJFOLDF(fload_cdata_typeid_cnew)
/* The content of int64 cdata objects is immutable. */
LJFOLD(FLOAD KGC IRFL_CDATA_INT64)
LJFOLDF(fload_cdata_int64_kgc)
{
if (LJ_LIKELY(J->flags & JIT_F_OPT_FOLD))
return fleft->op1; /* No PHI barrier needed. CNEW/CNEWP op1 is const. */
return INT64FOLD(*(uint64_t *)cdataptr(ir_kcdata(fleft)));
return NEXTFOLD;
}
/* Pointer cdata objects are immutable. */
LJFOLD(FLOAD CNEWP IRFL_CDATA_PTR)
LJFOLDF(fload_cdata_ptr_cnew)
LJFOLD(FLOAD CNEW IRFL_CDATA_TYPEID)
LJFOLD(FLOAD CNEWI IRFL_CDATA_TYPEID)
LJFOLDF(fload_cdata_typeid_cnew)
{
if (LJ_LIKELY(J->flags & JIT_F_OPT_FOLD))
return fleft->op1; /* No PHI barrier needed. CNEW/CNEWI op1 is const. */
return NEXTFOLD;
}
/* Pointer and int64 cdata objects are immutable. */
LJFOLD(FLOAD CNEWI IRFL_CDATA_PTR)
LJFOLD(FLOAD CNEWI IRFL_CDATA_INT64)
LJFOLDF(fload_cdata_ptr_int64_cnew)
{
if (LJ_LIKELY(J->flags & JIT_F_OPT_FOLD))
return fleft->op2; /* Fold even across PHI to avoid allocations. */
@@ -1786,6 +1796,7 @@ LJFOLDF(fload_cdata_ptr_cnew)
LJFOLD(FLOAD any IRFL_STR_LEN)
LJFOLD(FLOAD any IRFL_CDATA_TYPEID)
LJFOLD(FLOAD any IRFL_CDATA_PTR)
LJFOLD(FLOAD any IRFL_CDATA_INT64)
LJFOLD(VLOAD any any) /* Vararg loads have no corresponding stores. */
LJFOLDX(lj_opt_cse)