[tip:perf/core] perf report: Also do default setup for synthesized branch stacks

[tip-bot for Adrian Hunter <tipbot@zytor.com>]

Commit-ID:  fb9fab66e6e3ee737e521c899684c6d684b24a22
Gitweb:     http://git.kernel.org/tip/fb9fab66e6e3ee737e521c899684c6d684b24a22
Author:     Adrian Hunter <adrian.hunter@intel.com>
AuthorDate: Fri, 25 Sep 2015 16:15:41 +0300
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 28 Sep 2015 16:54:45 -0300

perf report: Also do default setup for synthesized branch stacks

The 'perf report' tool will default to displaying branch stacks (-b
option) if they are present.  Make that also happen for synthesized
branch stacks.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-11-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-report.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 7af35af..92f7c5a 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -829,6 +829,9 @@ repeat:
 	has_br_stack = perf_header__has_feat(&session->header,
 					     HEADER_BRANCH_STACK);
 
+	if (itrace_synth_opts.last_branch)
+		has_br_stack = true;
+
 	/*
 	 * Branch mode is a tristate:
 	 * -1 means default, so decide based on the file having branch data.