Issue #7616: Fix copying of overlapping memoryview slices with the Intel

compiler.

2 files changed, 6 insertions, 11 deletions

diff --git a/Misc/NEWS b/Misc/NEWS
index dbfc4c5..0c11639 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@ What's New in Python 3.2 Alpha 1?
 Core and Builtins
 -----------------
 
+- Issue #7616: Fix copying of overlapping memoryview slices with the Intel
+  compiler.
+
 - Issue #8413: structsequence now subclasses tuple.
 
 - Issue #8271: during the decoding of an invalid UTF-8 byte sequence, only the
diff --git a/Objects/memoryobject.c b/Objects/memoryobject.c
index e92a771..5b3caf2 100644
--- a/Objects/memoryobject.c
+++ b/Objects/memoryobject.c
@@ -624,7 +624,7 @@ memory_subscript(PyMemoryViewObject *self, PyObject *key)
 static int
 memory_ass_sub(PyMemoryViewObject *self, PyObject *key, PyObject *value)
 {
-    Py_ssize_t start, len, bytelen, i;
+    Py_ssize_t start, len, bytelen;
     Py_buffer srcview;
     Py_buffer *view = &(self->view);
     char *srcbuf, *destbuf;
@@ -694,16 +694,8 @@ memory_ass_sub(PyMemoryViewObject *self, PyObject *key, PyObject *value)
     if (destbuf + bytelen < srcbuf || srcbuf + bytelen < destbuf)
         /* No overlapping */
         memcpy(destbuf, srcbuf, bytelen);
-    else if (destbuf < srcbuf) {
-        /* Copy in ascending order */
-        for (i = 0; i < bytelen; i++)
-            destbuf[i] = srcbuf[i];
-    }
-    else {
-        /* Copy in descencing order */
-        for (i = bytelen - 1; i >= 0; i--)
-            destbuf[i] = srcbuf[i];
-    }
+    else
+        memmove(destbuf, srcbuf, bytelen);
 
     PyBuffer_Release(&srcview);
     return 0;