On 10/21/21 23:05, Richard Henderson wrote: > Signed-off-by: Richard Henderson <richard.hender...@linaro.org> > --- > tcg/optimize.c | 56 ++++++++++++++++++++++++++++---------------------- > 1 file changed, 31 insertions(+), 25 deletions(-)
> +static bool fold_movcond(OptContext *ctx, TCGOp *op) > +{ > + TCGOpcode opc = op->opc; > + TCGCond cond = op->args[5]; > + int i = do_constant_folding_cond(opc, op->args[1], op->args[2], cond); > + > + if (i >= 0) { > + return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[4 - i]); > + } > + > + if (arg_is_const(op->args[3]) && arg_is_const(op->args[4])) { > + uint64_t tv = arg_info(op->args[3])->val; > + uint64_t fv = arg_info(op->args[4])->val; > + > + opc = (opc == INDEX_op_movcond_i32 > + ? INDEX_op_setcond_i32 : INDEX_op_setcond_i64); > + > + if (tv == 1 && fv == 0) { > + op->opc = opc; > + op->args[3] = cond; > + } else if (fv == 1 && tv == 0) { Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org> > + op->opc = opc; > + op->args[3] = tcg_invert_cond(cond); > + } > + } > + return false; > +}