[glibc] test-memcpy: Actually reverse source and destination

[Siddhesh Poyarekar <siddhesh@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=dfc7bf8a24f63532da167cc7131227c1c4027ffb

commit dfc7bf8a24f63532da167cc7131227c1c4027ffb
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date:   Wed Apr 6 12:45:39 2022 +0530

    test-memcpy: Actually reverse source and destination
    
    Looks like an oversight in memcpy tests resulted in s2 and s1 not being
    swapped for the second iteration of the memcpy test.  Fix it.  Also fix
    a formatting nit.
    
    Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

Diff:
---
 string/test-memcpy-support.h | 46 +++++++++++++++++++++++---------------------
 1 file changed, 24 insertions(+), 22 deletions(-)

diff --git a/string/test-memcpy-support.h b/string/test-memcpy-support.h
index f1763da895..699c00ce4c 100644
--- a/string/test-memcpy-support.h
+++ b/string/test-memcpy-support.h
@@ -84,7 +84,7 @@ do_one_test (impl_t *impl, char *dst, const char *src, size_t len)
 static void
 do_test (size_t align1, size_t align2, size_t len)
 {
-  size_t i, j, repeats;
+  size_t i, j;
   char *s1, *s2;
 
   align1 &= 4095;
@@ -97,13 +97,16 @@ do_test (size_t align1, size_t align2, size_t len)
 
   s1 = (char *)(buf1 + align1);
   s2 = (char *)(buf2 + align2);
-  for (repeats = 0; repeats < 2; ++repeats)
+  for (size_t repeats = 0; repeats < 2; ++repeats)
     {
       for (i = 0, j = 1; i < len; i++, j += 23)
         s1[i] = j;
 
       FOR_EACH_IMPL (impl, 0)
       do_one_test (impl, s2, s1, len);
+
+      s1 = (char *) (buf2 + align1);
+      s2 = (char *) (buf1 + align2);
     }
 }
 
@@ -138,30 +141,29 @@ do_test1 (size_t align1, size_t align2, size_t size)
   unaligned_uint32_t *dest = large_buf + align1;
   unaligned_uint32_t *src = large_buf + region_size + 2 * page_size + align2;
   size_t i;
-  size_t repeats;
-  for (repeats = 0; repeats < 2; repeats++)
+  for (size_t repeats = 0; repeats < 2; repeats++)
     {
       for (i = 0; i < array_size; i++)
         src[i] = (uint32_t)i;
       FOR_EACH_IMPL (impl, 0)
-      {
-        memset (dest, -1, size);
-        CALL (impl, (char *)dest, (char *)src, size);
-        if (memcmp (src, dest, size))
-          {
-            for (i = 0; i < array_size; i++)
-              if (dest[i] != src[i])
-                {
-                  error (0, 0,
-                         "Wrong result in function %s dst \"%p\" src \"%p\" "
-                         "offset \"%zd\"",
-                         impl->name, dest, src, i);
-                  ret = 1;
-                  munmap ((void *)large_buf, mmap_size);
-                  return;
-                }
-          }
-      }
+	{
+	  memset (dest, -1, size);
+	  CALL (impl, (char *)dest, (char *)src, size);
+	  if (memcmp (src, dest, size))
+	    {
+	      for (i = 0; i < array_size; i++)
+		if (dest[i] != src[i])
+		  {
+		    error (0, 0,
+			   "Wrong result in function %s dst \"%p\" src \"%p\" "
+			   "offset \"%zd\"",
+			   impl->name, dest, src, i);
+		    ret = 1;
+		    munmap ((void *)large_buf, mmap_size);
+		    return;
+		  }
+	    }
+	}
       dest = large_buf + region_size + 2 * page_size + align1;
       src = large_buf + align2;
     }