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tcg/optimize: Split out copy_propagate 

Continue splitting tcg_optimize.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-08-24 08:04:47 -07:00
parent e2577ea24f
commit 8774dded02
1 changed files with 14 additions and 8 deletions
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22
tcg/optimize.c
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@ -611,6 +611,19 @@ static void init_arguments(OptContext *ctx, TCGOp *op, int nb_args)
}
}
static void copy_propagate(OptContext *ctx, TCGOp *op,
int nb_oargs, int nb_iargs)
{
TCGContext *s = ctx->tcg;
for (int i = nb_oargs; i < nb_oargs + nb_iargs; i++) {
TCGTemp *ts = arg_temp(op->args[i]);
if (ts && ts_is_copy(ts)) {
op->args[i] = temp_arg(find_better_copy(s, ts));
}
}
}
/* Propagate constants and copies, fold constant expressions. */
void tcg_optimize(TCGContext *s)
{
@ -646,14 +659,7 @@ void tcg_optimize(TCGContext *s)
nb_iargs = def->nb_iargs;
}
init_arguments(&ctx, op, nb_oargs + nb_iargs);
/* Do copy propagation */
for (i = nb_oargs; i < nb_oargs + nb_iargs; i++) {
TCGTemp *ts = arg_temp(op->args[i]);
if (ts && ts_is_copy(ts)) {
op->args[i] = temp_arg(find_better_copy(s, ts));
}
}
copy_propagate(&ctx, op, nb_oargs, nb_iargs);
/* For commutative operations make constant second argument */
switch (opc) {