perf script: Refactor branch stack printing

Remove duplicate code so that future changes to flags are always made to
all 3 printing variations.

Signed-off-by: James Clark <james.clark@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20220307171917.2555829-4-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-script.c

@@ -857,6 +857,15 @@ mispred_str(struct branch_entry *br)
 	return br->flags.predicted ? 'P' : 'M';
 }
 
+static int print_bstack_flags(FILE *fp, struct branch_entry *br)
+{
+	return fprintf(fp, "/%c/%c/%c/%d ",
+		       mispred_str(br),
+		       br->flags.in_tx ? 'X' : '-',
+		       br->flags.abort ? 'A' : '-',
+		       br->flags.cycles);
+}
+
 static int perf_sample__fprintf_brstack(struct perf_sample *sample,
 					struct thread *thread,
 					struct perf_event_attr *attr, FILE *fp)
@@ -895,11 +904,7 @@ static int perf_sample__fprintf_brstack(struct perf_sample *sample,
 			printed += fprintf(fp, ")");
 		}
 
-		printed += fprintf(fp, "/%c/%c/%c/%d ",
-			mispred_str(entries + i),
-			entries[i].flags.in_tx ? 'X' : '-',
-			entries[i].flags.abort ? 'A' : '-',
-			entries[i].flags.cycles);
+		printed += print_bstack_flags(fp, entries + i);
 	}
 
 	return printed;
@@ -941,11 +946,7 @@ static int perf_sample__fprintf_brstacksym(struct perf_sample *sample,
 			printed += map__fprintf_dsoname(alt.map, fp);
 			printed += fprintf(fp, ")");
 		}
-		printed += fprintf(fp, "/%c/%c/%c/%d ",
-			mispred_str(entries + i),
-			entries[i].flags.in_tx ? 'X' : '-',
-			entries[i].flags.abort ? 'A' : '-',
-			entries[i].flags.cycles);
+		printed += print_bstack_flags(fp, entries + i);
 	}
 
 	return printed;
@@ -991,11 +992,7 @@ static int perf_sample__fprintf_brstackoff(struct perf_sample *sample,
 			printed += map__fprintf_dsoname(alt.map, fp);
 			printed += fprintf(fp, ")");
 		}
-		printed += fprintf(fp, "/%c/%c/%c/%d ",
-			mispred_str(entries + i),
-			entries[i].flags.in_tx ? 'X' : '-',
-			entries[i].flags.abort ? 'A' : '-',
-			entries[i].flags.cycles);
+		printed += print_bstack_flags(fp, entries + i);
 	}
 
 	return printed;