linux-kernel - [PATCH v2 2/5] perf annotate: Add and use ins__is

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Date: Fri, 29 Mar 2024 14:58:09 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Kan Liang <kan.liang@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org
Subject: [PATCH v2 2/5] perf annotate: Add and use ins__is_nop()

Likewise, add ins__is_nop() to check if the current instruction is NOP.

Tested-by: Ian Rogers <irogers@...gle.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/annotate.c | 7 ++++++-
 tools/perf/util/annotate.h | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 986c499150ef..5d0ca004dcfb 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -757,6 +757,11 @@ static struct ins_ops ret_ops = {
 	.scnprintf = ins__raw_scnprintf,
 };
 
+bool ins__is_nop(const struct ins *ins)
+{
+	return ins->ops == &nop_ops;
+}
+
 bool ins__is_ret(const struct ins *ins)
 {
 	return ins->ops == &ret_ops;
@@ -1785,7 +1790,7 @@ static void delete_last_nop(struct symbol *sym)
 		dl = list_entry(list->prev, struct disasm_line, al.node);
 
 		if (dl->ins.ops) {
-			if (dl->ins.ops != &nop_ops)
+			if (!ins__is_nop(&dl->ins))
 				return;
 		} else {
 			if (!strstr(dl->al.line, " nop ") &&
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 14980b65f812..98f556af637c 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -74,6 +74,7 @@ struct ins_ops {
 
 bool ins__is_jump(const struct ins *ins);
 bool ins__is_call(const struct ins *ins);
+bool ins__is_nop(const struct ins *ins);
 bool ins__is_ret(const struct ins *ins);
 bool ins__is_lock(const struct ins *ins);
 int ins__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name);
-- 
2.44.0.478.gd926399ef9-goog