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tcg: Add TCG_OPF_NOT_PRESENT to opcodes without inputs or outputs

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The br, mb, goto_tb and exit_tb opcodes do not have
register operands, only constants, flags, or labels.
Remove the special case in opcode_args_ct by including
TCG_OPF_NOT_PRESENT in the flags for these opcodes.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2025-01-03 11:08:44 -08:00
parent b277cdd20b
commit 07ffd5b219
2 changed files with 4 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

8
include/tcg/tcg-opc.h
View file

@ -33,7 +33,7 @@ DEF(set_label, 0, 0, 1, TCG_OPF_BB_END | TCG_OPF_NOT_PRESENT)
/* variable number of parameters */
DEF(call, 0, 0, 3, TCG_OPF_CALL_CLOBBER | TCG_OPF_NOT_PRESENT)
DEF(br, 0, 0, 1, TCG_OPF_BB_END)
DEF(br, 0, 0, 1, TCG_OPF_BB_END | TCG_OPF_NOT_PRESENT)
#define IMPL(X) (__builtin_constant_p(X) && (X) <= 0 ? TCG_OPF_NOT_PRESENT : 0)
#if TCG_TARGET_REG_BITS == 32
@ -42,7 +42,7 @@ DEF(br, 0, 0, 1, TCG_OPF_BB_END)
# define IMPL64 TCG_OPF_64BIT
#endif
DEF(mb, 0, 0, 1, 0)
DEF(mb, 0, 0, 1, TCG_OPF_NOT_PRESENT)
DEF(mov_i32, 1, 1, 0, TCG_OPF_NOT_PRESENT)
DEF(setcond_i32, 1, 2, 1, 0)
@ -193,8 +193,8 @@ DEF(mulsh_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_mulsh_i64))
/* There are tcg_ctx->insn_start_words here, not just one. */
DEF(insn_start, 0, 0, DATA64_ARGS, TCG_OPF_NOT_PRESENT)
DEF(exit_tb, 0, 0, 1, TCG_OPF_BB_EXIT | TCG_OPF_BB_END)
DEF(goto_tb, 0, 0, 1, TCG_OPF_BB_EXIT | TCG_OPF_BB_END)
DEF(exit_tb, 0, 0, 1, TCG_OPF_BB_EXIT | TCG_OPF_BB_END | TCG_OPF_NOT_PRESENT)
DEF(goto_tb, 0, 0, 1, TCG_OPF_BB_EXIT | TCG_OPF_BB_END | TCG_OPF_NOT_PRESENT)
DEF(goto_ptr, 0, 1, 0, TCG_OPF_BB_EXIT | TCG_OPF_BB_END)
DEF(plugin_cb, 0, 0, 1, TCG_OPF_NOT_PRESENT)

3
tcg/tcg.c
View file

@ -3371,9 +3371,6 @@ static const TCGArgConstraint *opcode_args_ct(const TCGOp *op)
assert(tcg_op_supported(op->opc, TCGOP_TYPE(op), TCGOP_FLAGS(op)));
#endif
if (def->nb_iargs + def->nb_oargs == 0) {
return NULL;
}
if (def->flags & TCG_OPF_NOT_PRESENT) {
return empty_cts;
}