tcg: Apply life analysis to 64-bit multiword arithmetic ops
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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28
tcg/tcg.c
28
tcg/tcg.c
@ -1217,7 +1217,7 @@ static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps,
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static void tcg_liveness_analysis(TCGContext *s)
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{
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int i, op_index, nb_args, nb_iargs, nb_oargs, arg, nb_ops;
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TCGOpcode op;
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TCGOpcode op, op_new;
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TCGArg *args;
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const TCGOpDef *def;
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uint8_t *dead_temps, *mem_temps;
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@ -1324,7 +1324,17 @@ static void tcg_liveness_analysis(TCGContext *s)
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break;
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case INDEX_op_add2_i32:
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op_new = INDEX_op_add_i32;
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goto do_addsub2;
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case INDEX_op_sub2_i32:
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op_new = INDEX_op_sub_i32;
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goto do_addsub2;
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case INDEX_op_add2_i64:
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op_new = INDEX_op_add_i64;
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goto do_addsub2;
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case INDEX_op_sub2_i64:
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op_new = INDEX_op_sub_i64;
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do_addsub2:
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args -= 6;
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nb_iargs = 4;
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nb_oargs = 2;
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@ -1337,12 +1347,7 @@ static void tcg_liveness_analysis(TCGContext *s)
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goto do_remove;
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}
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/* Create the single operation plus nop. */
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if (op == INDEX_op_add2_i32) {
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op = INDEX_op_add_i32;
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} else {
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op = INDEX_op_sub_i32;
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}
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s->gen_opc_buf[op_index] = op;
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s->gen_opc_buf[op_index] = op = op_new;
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args[1] = args[2];
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args[2] = args[4];
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assert(s->gen_opc_buf[op_index + 1] == INDEX_op_nop);
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@ -1354,6 +1359,13 @@ static void tcg_liveness_analysis(TCGContext *s)
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goto do_not_remove;
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case INDEX_op_mulu2_i32:
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case INDEX_op_muls2_i32:
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op_new = INDEX_op_mul_i32;
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goto do_mul2;
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case INDEX_op_mulu2_i64:
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case INDEX_op_muls2_i64:
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op_new = INDEX_op_mul_i64;
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do_mul2:
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args -= 4;
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nb_iargs = 2;
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nb_oargs = 2;
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@ -1362,7 +1374,7 @@ static void tcg_liveness_analysis(TCGContext *s)
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if (dead_temps[args[0]] && !mem_temps[args[0]]) {
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goto do_remove;
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}
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s->gen_opc_buf[op_index] = op = INDEX_op_mul_i32;
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s->gen_opc_buf[op_index] = op = op_new;
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args[1] = args[2];
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args[2] = args[3];
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assert(s->gen_opc_buf[op_index + 1] == INDEX_op_nop);
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