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SubjectRe: [PATCH v2 7/8] perf expr: Move ID handling to its own function
On Wed, Nov 10, 2021 at 04:21:08PM -0800, Ian Rogers wrote:
> This will facilitate sharing in a follow-on change.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
> tools/perf/util/expr.y | 60 ++++++++++++++++++++++++------------------
> 1 file changed, 34 insertions(+), 26 deletions(-)
>
> diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y
> index ba6c6dbf30c8..d90addf9b937 100644
> --- a/tools/perf/util/expr.y
> +++ b/tools/perf/util/expr.y
> @@ -3,6 +3,7 @@
> #define YYDEBUG 1
> #include <assert.h>
> #include <math.h>
> +#include <stdlib.h>
> #include "util/debug.h"
> #define IN_EXPR_Y 1
> #include "expr.h"
> @@ -82,6 +83,38 @@ static struct ids union_expr(struct ids ids1, struct ids ids2)
> return result;
> }
>
> +static struct ids handle_id(struct expr_parse_ctx *ctx, char *id,
> + bool compute_ids)
> +{
> + struct ids result;

nit, missing extra line in here

other than that for the whole patchset:

Acked-by: Jiri Olsa <jolsa@redhat.com>

thanks,
jirka

> + if (!compute_ids) {
> + /*
> + * Compute the event's value from ID. If the ID isn't known then
> + * it isn't used to compute the formula so set to NAN.
> + */
> + struct expr_id_data *data;
> +
> + result.val = NAN;
> + if (expr__resolve_id(ctx, id, &data) == 0)
> + result.val = expr_id_data__value(data);
> +
> + result.ids = NULL;
> + free(id);
> + } else {
> + /*
> + * Set the value to BOTTOM to show that any value is possible
> + * when the event is computed. Create a set of just the ID.
> + */
> + result.val = BOTTOM;
> + result.ids = ids__new();
> + if (!result.ids || ids__insert(result.ids, id)) {
> + pr_err("Error creating IDs for '%s'", id);
> + free(id);
> + }
> + }
> + return result;
> +}
> +
> /*
> * If we're not computing ids or $1 and $3 are constants, compute the new
> * constant value using OP. Its invariant that there are no ids. If computing
> @@ -167,32 +200,7 @@ expr: NUMBER
> $$.val = $1;
> $$.ids = NULL;
> }
> -| ID
> -{
> - if (!compute_ids) {
> - /*
> - * Compute the event's value from ID. If the ID isn't known then
> - * it isn't used to compute the formula so set to NAN.
> - */
> - struct expr_id_data *data;
> -
> - $$.val = NAN;
> - if (expr__resolve_id(ctx, $1, &data) == 0)
> - $$.val = expr_id_data__value(data);
> -
> - $$.ids = NULL;
> - free($1);
> - } else {
> - /*
> - * Set the value to BOTTOM to show that any value is possible
> - * when the event is computed. Create a set of just the ID.
> - */
> - $$.val = BOTTOM;
> - $$.ids = ids__new();
> - if (!$$.ids || ids__insert($$.ids, $1))
> - YYABORT;
> - }
> -}
> +| ID { $$ = handle_id(ctx, $1, compute_ids); }
> | expr '|' expr { BINARY_LONG_OP($$, |, $1, $3); }
> | expr '&' expr { BINARY_LONG_OP($$, &, $1, $3); }
> | expr '^' expr { BINARY_LONG_OP($$, ^, $1, $3); }
> --
> 2.34.0.rc1.387.gb447b232ab-goog
>

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