fix memcpy

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/runner.py b/tests/runner.py
index 4c8b6379..ffac5045 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -4108,6 +4108,31 @@ The current type of b is: 9
         self.do_run(src, '6c9cdfe937383b79e52ca7a2cce83a21d9f5422c',
                     output_nicerizer = check)
 
+    def test_memcpy2(self):
+      src = r'''
+        #include <stdio.h>
+        #include <string.h>
+        #include <assert.h>
+        int main() {
+          char buffer[256];
+          for (int i = 0; i < 10; i++) {
+            for (int j = 0; j < 10; j++) {
+              for (int k = 0; k < 35; k++) {
+                for (int t = 0; t < 256; t++) buffer[t] = t;
+                char *dest = buffer + i + 128;
+                char *src = buffer+j;
+                //printf("%d, %d, %d\n", i, j, k);
+                assert(memcpy(dest, src, k) == dest);
+                assert(memcmp(dest, src, k) == 0);
+              }
+            }
+          }
+          printf("ok.\n");
+          return 1;
+        }
+      '''
+      self.do_run(src, 'ok.');
+
     def test_memmove(self):
       src = '''
         #include <stdio.h>