From: Martin Liska <mliska@suse.cz>
Date: Thu, 22 Jun 2017 11:27:31 +0000 (+0200)
Subject: Backport r247375
X-Git-Tag: releases/gcc-5.5.0~198
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1c1758975fb0717bb1cbdd5203c2e5bddbe83915;p=thirdparty%2Fgcc.git

Backport r247375

2017-06-22  Martin Liska  <mliska@suse.cz>

	Backport from mainline
	2017-04-28  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/53915
	* gcov.c (format_gcov): Print 'NAN %' when top > bottom.

From-SVN: r249529
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e4f023f03c01..5022643b23d5 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2017-06-22  Martin Liska  <mliska@suse.cz>
+
+	Backport from mainline
+	2017-04-28  Martin Liska  <mliska@suse.cz>
+
+	PR gcov-profile/53915
+	* gcov.c (format_gcov): Print 'NAN %' when top > bottom.
+
 2017-06-22  Martin Liska  <mliska@suse.cz>
 
 	Backport from mainline
diff --git a/gcc/gcov.c b/gcc/gcov.c
index fd65efff94e1..79128ff50c05 100644
--- a/gcc/gcov.c
+++ b/gcc/gcov.c
@@ -1768,6 +1768,13 @@ format_gcov (gcov_type top, gcov_type bottom, int dp)
 {
   static char buffer[20];
 
+  /* Handle invalid values that would result in a misleading value.  */
+  if (bottom != 0 && top > bottom && dp >= 0)
+    {
+      sprintf (buffer, "NAN %%");
+      return buffer;
+    }
+
   if (dp >= 0)
     {
       float ratio = bottom ? (float)top / bottom : 0;