diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ae48268f38c..11e75bc159b 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2011-01-03  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
+
+	* gcc.dg/torture/vector-shift2.c (schar): Define.
+	(main): Always use schar or uchar instead of plain "char" to avoid
+	dependencies on implementation-defined char signedness.
+
 2011-01-03  Martin Jambor  <mjambor@suse.cz>
 
 	PR tree-optimization/46801
diff --git a/gcc/testsuite/gcc.dg/torture/vector-shift2.c b/gcc/testsuite/gcc.dg/torture/vector-shift2.c
index a4ca9240058..0e8a0eb2455 100644
--- a/gcc/testsuite/gcc.dg/torture/vector-shift2.c
+++ b/gcc/testsuite/gcc.dg/torture/vector-shift2.c
@@ -4,6 +4,7 @@
 __attribute__((vector_size((elcount)*sizeof(type)))) type
 
 #define vidx(type, vec, idx) (*((type *) &(vec) + idx))
+#define schar signed char
 #define uchar unsigned char
 
 #define ch14 1,2,3,4
@@ -12,43 +13,43 @@ __attribute__((vector_size((elcount)*sizeof(type)))) type
 
 int main (int argc, char *argv[]) {
     vector(16, uchar) vuchar  = { ch14, ch14, ch14, ch14};
-    vector(16,  char) vchar0  = { ch1, ch1, ch1, ch1};
-    vector(16,  char) vchar1  = { chm1, chm1, chm1, chm1};
+    vector(16, schar) vchar0  = { ch1, ch1, ch1, ch1};
+    vector(16, schar) vchar1  = { chm1, chm1, chm1, chm1};
 
-    vector(16,  char) i1, i2, i3;
+    vector(16, schar) i1, i2, i3;
     vector(16, uchar) u1, u2, u3;
 
     i1 = vchar1<< vchar0;
     
-    if (vidx(char, i1, 0) != ((char)-1 << (char)1))
+    if (vidx(schar, i1, 0) != ((schar)-1 << (schar)1))
         __builtin_abort ();
-    if (vidx(char, i1, 1) != ((char)-1 << (char)1))
+    if (vidx(schar, i1, 1) != ((schar)-1 << (schar)1))
         __builtin_abort ();
-    if (vidx(char, i1, 2) != ((char)-1 << (char)1))
+    if (vidx(schar, i1, 2) != ((schar)-1 << (schar)1))
         __builtin_abort ();
-    if (vidx(char, i1, 3) != ((char)-1 << (char)1))
+    if (vidx(schar, i1, 3) != ((schar)-1 << (schar)1))
         __builtin_abort ();
     u1 = vuchar << vchar0;
 
-    if (vidx(char, u1, 0) != ((uchar)1  << (char)1))
+    if (vidx(uchar, u1, 0) != ((uchar)1  << (schar)1))
         __builtin_abort ();
-    if (vidx(char, u1, 1) != ((uchar)2  << (char)1))
+    if (vidx(uchar, u1, 1) != ((uchar)2  << (schar)1))
         __builtin_abort ();
-    if (vidx(char, u1, 2) != ((uchar)3  << (char)1))
+    if (vidx(uchar, u1, 2) != ((uchar)3  << (schar)1))
         __builtin_abort ();
-    if (vidx(char, u1, 3) != ((uchar)4  << (char)1))
+    if (vidx(uchar, u1, 3) != ((uchar)4  << (schar)1))
         __builtin_abort ();
 
     
     i2 = vchar1 >> vuchar;
 
-    if (vidx(char, i2, 0) != ((char)-1  >> (uchar)1))
+    if (vidx(schar, i2, 0) != ((schar)-1  >> (uchar)1))
         __builtin_abort ();
-    if (vidx(char, i2, 1) != ((char)-1  >> (uchar)2))
+    if (vidx(schar, i2, 1) != ((schar)-1  >> (uchar)2))
         __builtin_abort ();
-    if (vidx(char, i2, 2) != ((char)-1  >> (uchar)3))
+    if (vidx(schar, i2, 2) != ((schar)-1  >> (uchar)3))
         __builtin_abort ();
-    if (vidx(char, i2, 3) != ((char)-1  >> (uchar)4))
+    if (vidx(schar, i2, 3) != ((schar)-1  >> (uchar)4))
         __builtin_abort ();
     
     vchar1 >>= vuchar;