fix memmove bug and add testing

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/runner.py b/tests/runner.py
index 62600830..b6980933 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -4168,6 +4168,35 @@ The current type of b is: 9
       '''
       self.do_run(src, 'memmove can be very very useful')
 
+    def test_memmove2(self):
+      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('need ta2')
+
+      src = r'''
+        #include <stdio.h>
+        #include <string.h>
+        #include <assert.h>
+        int main() {
+          int sum = 0;
+          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;
+                char *src = buffer + j;
+                if (dest == src) continue;
+                //printf("%d, %d, %d\n", i, j, k);
+                assert(memmove(dest, src, k) == dest);
+                for (int t = 0; t < 256; t++) sum += buffer[t];
+              }
+            }
+          }
+          printf("final: %d.\n", sum);
+          return 1;
+        }
+      '''
+      self.do_run(src, 'final: -403200.');
+
     def test_bsearch(self):
       if Settings.QUANTUM_SIZE == 1: return self.skip('Test cannot work with q1')