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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>
This commit is contained in:
Richard Henderson 2013-02-19 23:52:02 -08:00 committed by Blue Swirl
parent f402f38f43
commit f1fae40c61
1 changed files with 20 additions and 8 deletions
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28
tcg/tcg.c
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@ -1217,7 +1217,7 @@ static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps,
static void tcg_liveness_analysis(TCGContext *s)
{
int i, op_index, nb_args, nb_iargs, nb_oargs, arg, nb_ops;
TCGOpcode op;
TCGOpcode op, op_new;
TCGArg *args;
const TCGOpDef *def;
uint8_t *dead_temps, *mem_temps;
@ -1324,7 +1324,17 @@ static void tcg_liveness_analysis(TCGContext *s)
break;
case INDEX_op_add2_i32:
op_new = INDEX_op_add_i32;
goto do_addsub2;
case INDEX_op_sub2_i32:
op_new = INDEX_op_sub_i32;
goto do_addsub2;
case INDEX_op_add2_i64:
op_new = INDEX_op_add_i64;
goto do_addsub2;
case INDEX_op_sub2_i64:
op_new = INDEX_op_sub_i64;
do_addsub2:
args -= 6;
nb_iargs = 4;
nb_oargs = 2;
@ -1337,12 +1347,7 @@ static void tcg_liveness_analysis(TCGContext *s)
goto do_remove;
}
/* Create the single operation plus nop. */
if (op == INDEX_op_add2_i32) {
op = INDEX_op_add_i32;
} else {
op = INDEX_op_sub_i32;
}
s->gen_opc_buf[op_index] = op;
s->gen_opc_buf[op_index] = op = op_new;
args[1] = args[2];
args[2] = args[4];
assert(s->gen_opc_buf[op_index + 1] == INDEX_op_nop);
@ -1354,6 +1359,13 @@ static void tcg_liveness_analysis(TCGContext *s)
goto do_not_remove;
case INDEX_op_mulu2_i32:
case INDEX_op_muls2_i32:
op_new = INDEX_op_mul_i32;
goto do_mul2;
case INDEX_op_mulu2_i64:
case INDEX_op_muls2_i64:
op_new = INDEX_op_mul_i64;
do_mul2:
args -= 4;
nb_iargs = 2;
nb_oargs = 2;
@ -1362,7 +1374,7 @@ static void tcg_liveness_analysis(TCGContext *s)
if (dead_temps[args[0]] && !mem_temps[args[0]]) {
goto do_remove;
}
s->gen_opc_buf[op_index] = op = INDEX_op_mul_i32;
s->gen_opc_buf[op_index] = op = op_new;
args[1] = args[2];
args[2] = args[3];
assert(s->gen_opc_buf[op_index + 1] == INDEX_op_nop);