From 347cce092ebd954d91046804c1d2b51b24eef68b Mon Sep 17 00:00:00 2001
From: Thomas Schwinge <thomas@codesourcery.com>
Date: Wed, 22 Sep 2021 12:42:41 +0200
Subject: [PATCH] Make sure that we get unique test names if several DejaGnu
 directives refer to the same line [PR102735]

	gcc/testsuite/
	PR testsuite/102735
	* lib/gcc-dg.exp (process-message): Make sure that we get unique
	test names.
---
 gcc/testsuite/lib/gcc-dg.exp | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/gcc/testsuite/lib/gcc-dg.exp b/gcc/testsuite/lib/gcc-dg.exp
index 7edd070d71d..78a6c3651ef 100644
--- a/gcc/testsuite/lib/gcc-dg.exp
+++ b/gcc/testsuite/lib/gcc-dg.exp
@@ -1191,8 +1191,18 @@ proc process-message { msgproc msgprefix dgargs } {
     upvar dg-messages dg-messages
 
     if { [llength $dgargs] == 5 } {
-	set num [get-absolute-line [lindex $dgargs 0] [lindex $dgargs 4]]
-	set dgargs [lreplace $dgargs 4 4 $num]
+	set useline [lindex $dgargs 0]
+
+	# Resolve absolute line number.
+	set line [get-absolute-line $useline [lindex $dgargs 4]]
+	set dgargs [lreplace $dgargs 4 4 $line]
+
+	if { $line != $useline } {
+	    # Make sure that we get unique test names if different USELINEs
+	    # refer to the same LINE.
+	    set comment "[lindex $dgargs 2] at line $useline"
+	    set dgargs [lreplace $dgargs 2 2 $comment]
+	}
     }
 
     # Process the dg- directive, including adding the regular expression
-- 
2.33.0