benchtests: Allow selecting baseline for compare_string.py

This patch allows one to provide the function name using an optional
-base option to compare all other functions against.  This is useful
when pitching one implementation of a string function against
alternatives.  In the absence of this option, comparisons are done
against the first ifunc in the list.

	* benchtests/scripts/compare_strings.py (main): Add an
	optional -base option.
	(process_results): New argument base_func.

1 files changed, 4 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 887fc71..efdd9b6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2017-08-07  Siddhesh Poyarekar  <siddhesh@sourceware.org>
 
+	* benchtests/scripts/compare_strings.py (main): Add an
+	optional -base option.
+	(process_results): New argument base_func.
+
 	* benchtests/bench-memcpy.c (test_main): Use TEST_NAME instead of
 	hardcoding memcpy.
 	* benchtests/bench-memcpy-large.c (test_name): Likewise.