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tcg: Pass number of arguments to tcg_emit_op() / tcg_op_insert_*()

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In order to have variable size allocated TCGOp, pass the number
of arguments we use (and would allocate) up to tcg_op_alloc().

This alters tcg_emit_op(), tcg_op_insert_before() and
tcg_op_insert_after() prototypes.

In tcg_op_alloc() ensure the number of arguments is in range.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
[PMD: Extracted from bigger patch]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221218211832.73312-2-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2022-12-18 22:18:31 +01:00 • committed by Richard Henderson
parent f266bec890
commit d44789434b
7 changed files with 39 additions and 30 deletions
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30
tcg/tcg.c
View file

@ -1479,7 +1479,7 @@ bool tcg_op_supported(TCGOpcode op)
and endian swap in tcg_reg_alloc_call(). */
void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
{
int i, real_args, nb_rets, pi;
int i, real_args, nb_rets, pi, max_args;
unsigned typemask;
const TCGHelperInfo *info;
TCGOp *op;
@ -1513,7 +1513,8 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
}
}
op = tcg_emit_op(INDEX_op_call);
max_args = ARRAY_SIZE(op->args);
op = tcg_emit_op(INDEX_op_call, max_args);
pi = 0;
if (ret != NULL) {
@ -1590,7 +1591,7 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
/* Make sure the fields didn't overflow. */
tcg_debug_assert(TCGOP_CALLI(op) == real_args);
tcg_debug_assert(pi <= ARRAY_SIZE(op->args));
tcg_debug_assert(pi <= max_args);
if (TCG_TARGET_CALL_ARG_I32 == TCG_CALL_ARG_EXTEND) {
for (i = 0; i < nargs; ++i) {
@ -2294,11 +2295,12 @@ void tcg_remove_ops_after(TCGOp *op)
}
}
static TCGOp *tcg_op_alloc(TCGOpcode opc)
static TCGOp *tcg_op_alloc(TCGOpcode opc, unsigned nargs)
{
TCGContext *s = tcg_ctx;
TCGOp *op;
assert(nargs < ARRAY_SIZE(op->args));
if (likely(QTAILQ_EMPTY(&s->free_ops))) {
op = tcg_malloc(sizeof(TCGOp));
} else {
@ -2312,23 +2314,25 @@ static TCGOp *tcg_op_alloc(TCGOpcode opc)
return op;
}
TCGOp *tcg_emit_op(TCGOpcode opc)
TCGOp *tcg_emit_op(TCGOpcode opc, unsigned nargs)
{
TCGOp *op = tcg_op_alloc(opc);
TCGOp *op = tcg_op_alloc(opc, nargs);
QTAILQ_INSERT_TAIL(&tcg_ctx->ops, op, link);
return op;
}
TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *old_op, TCGOpcode opc)
TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *old_op,
TCGOpcode opc, unsigned nargs)
{
TCGOp *new_op = tcg_op_alloc(opc);
TCGOp *new_op = tcg_op_alloc(opc, nargs);
QTAILQ_INSERT_BEFORE(old_op, new_op, link);
return new_op;
}
TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *old_op, TCGOpcode opc)
TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *old_op,
TCGOpcode opc, unsigned nargs)
{
TCGOp *new_op = tcg_op_alloc(opc);
TCGOp *new_op = tcg_op_alloc(opc, nargs);
QTAILQ_INSERT_AFTER(&s->ops, old_op, new_op, link);
return new_op;
}
@ -2937,7 +2941,7 @@ static bool liveness_pass_2(TCGContext *s)
TCGOpcode lopc = (arg_ts->type == TCG_TYPE_I32
? INDEX_op_ld_i32
: INDEX_op_ld_i64);
TCGOp *lop = tcg_op_insert_before(s, op, lopc);
TCGOp *lop = tcg_op_insert_before(s, op, lopc, 3);
lop->args[0] = temp_arg(dir_ts);
lop->args[1] = temp_arg(arg_ts->mem_base);
@ -3003,7 +3007,7 @@ static bool liveness_pass_2(TCGContext *s)
TCGOpcode sopc = (arg_ts->type == TCG_TYPE_I32
? INDEX_op_st_i32
: INDEX_op_st_i64);
TCGOp *sop = tcg_op_insert_after(s, op, sopc);
TCGOp *sop = tcg_op_insert_after(s, op, sopc, 3);
TCGTemp *out_ts = dir_ts;
if (IS_DEAD_ARG(0)) {
@ -3039,7 +3043,7 @@ static bool liveness_pass_2(TCGContext *s)
TCGOpcode sopc = (arg_ts->type == TCG_TYPE_I32
? INDEX_op_st_i32
: INDEX_op_st_i64);
TCGOp *sop = tcg_op_insert_after(s, op, sopc);
TCGOp *sop = tcg_op_insert_after(s, op, sopc, 3);
sop->args[0] = temp_arg(dir_ts);
sop->args[1] = temp_arg(arg_ts->mem_base);