> It's odd that the checksum doesn't depend on the number of iterations done ...

This is because the difference between the calculated result (32063.902344) and
the expected result (32000.000000) is small. The current check is that the 
result
is considered correct as long as the `value/expected` ratio is between 0.99f and
1.01f. I'm not sure if this check is enough, but I should also update the 
expected
result to 32063.902344 (the same without vectorized).

Best,
Lehua

gcc/testsuite/ChangeLog:

        * gcc.dg/vect/tsvc/tsvc.h:
        * gcc.dg/vect/tsvc/vect-tsvc-s176.c:

---
 gcc/testsuite/gcc.dg/vect/tsvc/tsvc.h           | 2 +-
 gcc/testsuite/gcc.dg/vect/tsvc/vect-tsvc-s176.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/testsuite/gcc.dg/vect/tsvc/tsvc.h 
b/gcc/testsuite/gcc.dg/vect/tsvc/tsvc.h
index cd39c041903d..d910c384fc83 100644
--- a/gcc/testsuite/gcc.dg/vect/tsvc/tsvc.h
+++ b/gcc/testsuite/gcc.dg/vect/tsvc/tsvc.h
@@ -1164,7 +1164,7 @@ real_t get_expected_result(const char * name)
     } else if (!strcmp(name, "s175")) {
        return 32009.023438f;
     } else if (!strcmp(name, "s176")) {
-       return 32000.f;
+       return 32063.902344f;
     } else if (!strcmp(name, "s211")) {
        return 63983.308594f;
     } else if (!strcmp(name, "s212")) {
diff --git a/gcc/testsuite/gcc.dg/vect/tsvc/vect-tsvc-s176.c 
b/gcc/testsuite/gcc.dg/vect/tsvc/vect-tsvc-s176.c
index 79faf7fdb9e4..365e5205982b 100644
--- a/gcc/testsuite/gcc.dg/vect/tsvc/vect-tsvc-s176.c
+++ b/gcc/testsuite/gcc.dg/vect/tsvc/vect-tsvc-s176.c
@@ -14,7 +14,7 @@ real_t s176(struct args_t * func_args)
     initialise_arrays(__func__);
 
     int m = LEN_1D/2;
-    for (int nl = 0; nl < 4*(iterations/LEN_1D); nl++) {
+    for (int nl = 0; nl < 4*(10*iterations/LEN_1D); nl++) {
         for (int j = 0; j < (LEN_1D/2); j++) {
             for (int i = 0; i < m; i++) {
                 a[i] += b[i+m-j-1] * c[j];
@@ -39,4 +39,4 @@ int main (int argc, char **argv)
   return 0;
 }
 
-/* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" { xfail *-*-* } } } 
*/
+/* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" } } */
-- 
2.36.1

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