diff options
Diffstat (limited to 'tcg/optimize.c')
| -rw-r--r-- | tcg/optimize.c | 60 |
1 files changed, 52 insertions, 8 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index 2ed6322f97..79e701652b 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -364,6 +364,13 @@ static TCGArg arg_new_constant(OptContext *ctx, uint64_t val) return temp_arg(ts); } +static TCGArg arg_new_temp(OptContext *ctx) +{ + TCGTemp *ts = tcg_temp_new_internal(ctx->type, TEMP_EBB); + init_ts_info(ctx, ts); + return temp_arg(ts); +} + static bool tcg_opt_gen_mov(OptContext *ctx, TCGOp *op, TCGArg dst, TCGArg src) { TCGTemp *dst_ts = arg_temp(dst); @@ -782,7 +789,7 @@ static bool swap_commutative2(TCGArg *p1, TCGArg *p2) * Return -1 if the condition can't be simplified, * and the result of the condition (0 or 1) if it can. */ -static int do_constant_folding_cond1(OptContext *ctx, TCGArg dest, +static int do_constant_folding_cond1(OptContext *ctx, TCGOp *op, TCGArg dest, TCGArg *p1, TCGArg *p2, TCGArg *pcond) { TCGCond cond; @@ -818,11 +825,28 @@ static int do_constant_folding_cond1(OptContext *ctx, TCGArg dest, ? INT32_MIN : INT64_MIN))) { *p2 = arg_new_constant(ctx, 0); *pcond = tcg_tst_ltge_cond(cond); + return -1; + } + + /* Expand to AND with a temporary if no backend support. */ + if (!TCG_TARGET_HAS_tst) { + TCGOpcode and_opc = (ctx->type == TCG_TYPE_I32 + ? INDEX_op_and_i32 : INDEX_op_and_i64); + TCGOp *op2 = tcg_op_insert_before(ctx->tcg, op, and_opc, 3); + TCGArg tmp = arg_new_temp(ctx); + + op2->args[0] = tmp; + op2->args[1] = *p1; + op2->args[2] = *p2; + + *p1 = tmp; + *p2 = arg_new_constant(ctx, 0); + *pcond = tcg_tst_eqne_cond(cond); } return -1; } -static int do_constant_folding_cond2(OptContext *ctx, TCGArg *args) +static int do_constant_folding_cond2(OptContext *ctx, TCGOp *op, TCGArg *args) { TCGArg al, ah, bl, bh; TCGCond c; @@ -898,6 +922,26 @@ static int do_constant_folding_cond2(OptContext *ctx, TCGArg *args) return -1; } } + + /* Expand to AND with a temporary if no backend support. */ + if (!TCG_TARGET_HAS_tst && is_tst_cond(c)) { + TCGOp *op1 = tcg_op_insert_before(ctx->tcg, op, INDEX_op_and_i32, 3); + TCGOp *op2 = tcg_op_insert_before(ctx->tcg, op, INDEX_op_and_i32, 3); + TCGArg t1 = arg_new_temp(ctx); + TCGArg t2 = arg_new_temp(ctx); + + op1->args[0] = t1; + op1->args[1] = al; + op1->args[2] = bl; + op2->args[0] = t2; + op2->args[1] = ah; + op2->args[2] = bh; + + args[0] = t1; + args[1] = t2; + args[3] = args[2] = arg_new_constant(ctx, 0); + args[4] = tcg_tst_eqne_cond(c); + } return -1; } @@ -1298,7 +1342,7 @@ static bool fold_andc(OptContext *ctx, TCGOp *op) static bool fold_brcond(OptContext *ctx, TCGOp *op) { - int i = do_constant_folding_cond1(ctx, NO_DEST, &op->args[0], + int i = do_constant_folding_cond1(ctx, op, NO_DEST, &op->args[0], &op->args[1], &op->args[2]); if (i == 0) { tcg_op_remove(ctx->tcg, op); @@ -1317,7 +1361,7 @@ static bool fold_brcond2(OptContext *ctx, TCGOp *op) TCGArg label; int i, inv = 0; - i = do_constant_folding_cond2(ctx, &op->args[0]); + i = do_constant_folding_cond2(ctx, op, &op->args[0]); cond = op->args[4]; label = op->args[5]; if (i >= 0) { @@ -1815,7 +1859,7 @@ static bool fold_movcond(OptContext *ctx, TCGOp *op) op->args[5] = tcg_invert_cond(op->args[5]); } - i = do_constant_folding_cond1(ctx, NO_DEST, &op->args[1], + i = do_constant_folding_cond1(ctx, op, NO_DEST, &op->args[1], &op->args[2], &op->args[5]); if (i >= 0) { return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[4 - i]); @@ -2151,7 +2195,7 @@ static void fold_setcond_tst_pow2(OptContext *ctx, TCGOp *op, bool neg) static bool fold_setcond(OptContext *ctx, TCGOp *op) { - int i = do_constant_folding_cond1(ctx, op->args[0], &op->args[1], + int i = do_constant_folding_cond1(ctx, op, op->args[0], &op->args[1], &op->args[2], &op->args[3]); if (i >= 0) { return tcg_opt_gen_movi(ctx, op, op->args[0], i); @@ -2165,7 +2209,7 @@ static bool fold_setcond(OptContext *ctx, TCGOp *op) static bool fold_negsetcond(OptContext *ctx, TCGOp *op) { - int i = do_constant_folding_cond1(ctx, op->args[0], &op->args[1], + int i = do_constant_folding_cond1(ctx, op, op->args[0], &op->args[1], &op->args[2], &op->args[3]); if (i >= 0) { return tcg_opt_gen_movi(ctx, op, op->args[0], -i); @@ -2182,7 +2226,7 @@ static bool fold_setcond2(OptContext *ctx, TCGOp *op) TCGCond cond; int i, inv = 0; - i = do_constant_folding_cond2(ctx, &op->args[1]); + i = do_constant_folding_cond2(ctx, op, &op->args[1]); cond = op->args[5]; if (i >= 0) { goto do_setcond_const; |