commit 77ae9c1933b5007fdcbd222b0eaa2d775ea6ae43
Author: Yao Qi <yao.qi@linaro.org>
Date:   Fri Nov 13 15:03:25 2015 +0000

    gdb.base/gnu_vector.exp: Don't test output from the inferior
    
    gdb.base/gnu_vector.c printf the vector and gdb.base/gnu_vector.exp
    expects the output by gdb_test_multiple.  Nowadays, the test doesn't
    expect the output from inferior_spawn_id, which is wrong.  Even we
    change the test to expect from inferior_spawn_id for the inferior
    output, it is still possible the inferior exit before tcl/expect gets
    the inferior output.  We see this fail on both s390x-linux and
    ppc-linux on buildbot,
    
      FAIL: gdb.base/gnu_vector.exp: verify vector return value (the program exited)
    
    https://sourceware.org/ml/gdb-testers/2015-q4/msg04922.html
    https://sourceware.org/ml/gdb-testers/2015-q4/msg04952.html
    
    In order to address these two shortcomings above in gnu_vector.exp,
    this patch rewrites the test a little bit.  Get rid of checking the
    inferior output, and instead checking them by printing them.  In this
    way, the test can also be run on the target without inferior io
    (gdb,noinferiorio is set in the board file).
    
    gdb/testsuite:
    
    2015-11-13  Yao Qi  <yao.qi@linaro.org>
    
    	* gdb.base/gnu_vector.exp: Check the return value by "p res".
    	* gdb.base/gnu_vector.c: Don't include stdio.h.
    	(main): Don't print res and call add_some_intvecs.

### a/gdb/testsuite/ChangeLog
### b/gdb/testsuite/ChangeLog
## -1,3 +1,9 @@
+2015-11-13  Yao Qi  <yao.qi@linaro.org>
+
+	* gdb.base/gnu_vector.exp: Check the return value by "p res".
+	* gdb.base/gnu_vector.c: Don't include stdio.h.
+	(main): Don't print res and call add_some_intvecs.
+
 2015-11-11  Marcin Kościelnicki  <koriakin@0x04.net>
 
 	* gdb.trace/change-loc.h: include "trace-common.h", remove SYMBOL
--- a/gdb/testsuite/gdb.base/gnu_vector.c
+++ b/gdb/testsuite/gdb.base/gnu_vector.c
@@ -18,7 +18,6 @@
    Contributed by Ken Werner <ken.werner@de.ibm.com>  */
 
 #include <stdarg.h>
-#include <stdio.h>
 
 #define VECTOR(n, type)					\
   type __attribute__ ((vector_size (n * sizeof(type))))
@@ -139,10 +138,10 @@ main ()
   int4 res;
 
   res = add_some_intvecs (i4a, i4a + i4b, i4b);
-  printf ("%d %d %d %d\n", res[0], res[1], res[2], res[3]);
 
   res = add_some_intvecs (i4a, i4a + i4b, i4b);
-  printf ("%d %d %d %d\n", res[0], res[1], res[2], res[3]);
+
+  add_some_intvecs (i4a, i4a + i4b, i4b);
 
   return 0;
 }
--- a/gdb/testsuite/gdb.base/gnu_vector.exp
+++ b/gdb/testsuite/gdb.base/gnu_vector.exp
@@ -216,8 +216,13 @@ gdb_test_multiple "finish" $test {
     }
 }
 
-# Test "return" from vector-valued function.
 gdb_continue "add_some_intvecs"
+gdb_test "up" ""
+gdb_test "p res" "\\{10, 20, 48, 72\\}.*"
+gdb_test "down" ""
+
+
+# Test "return" from vector-valued function.
 set test "return from vector-valued function"
 set should_kfail 0
 gdb_test_multiple "return (int4) \{4, 2, 7, 6\}" $test {
@@ -233,16 +238,6 @@ gdb_test_multiple "return (int4) \{4, 2, 7, 6\}" $test {
 	exp_continue
     }
 }
-set test "verify vector return value"
-gdb_test_multiple "continue" $test {
-    -re "4 2 7 6\r\n.*$gdb_prompt $" {
-	pass $test
-    }
-    -re "10 20 48 72\r\n.*$gdb_prompt $" {
-	if { $should_kfail } {
-	    kfail "gdb/8549" $test
-	} else {
-	    fail $test
-	}
-    }
-}
+
+gdb_test "next" ""
+gdb_test "p res" "\\{4, 2, 7, 6\\}.*" "verify vector return value"