This is the mail archive of the mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

[testsuite, i386] Reimplementing array comparison in avx2-vpop-check.h


Usually <stdlib.h> does not include <string.h> but on bionic it is
historically included. memcmp() reacts on a volatile argument
differently, depending on whether <string.h> is included or not. If it
is included, then the compiler will generate a warning:
warning: passing argument 2 of 'memcmp' discards 'volatile' qualifier
from pointer target type [enabled by default]

In avx2-vpop-check.h we compare two arrays using memcmp(), and since
one of them is declared as volatile we have test-fails because of that
warning. The following patch reimplements the comparison using just

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 943be90..9b08eb0 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2013-04-11  Grigoriy Kraynov  <>
+       * memcmp() replaced by for loop.
 2013-04-11  Paolo Carlini  <>

        PR c++/54216
diff --git a/gcc/testsuite/
index 143b54da..921ed0b 100644
--- a/gcc/testsuite/
+++ b/gcc/testsuite/
@@ -47,7 +47,8 @@ avx2_test (void)
       gen_pop ();
       check_pop ();

-      if (memcmp (c, c_ref, SIZE * sizeof (TYPE)))
-       abort();
+      for (i = 0; i < SIZE; ++i)
+        if (c[i] != c_ref[i])
+          abort();

is it OK?


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]