From 2c3710c52bc42b148d11d4381a453bff3921313a Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Mon, 2 Dec 2002 02:40:58 +0000
Subject: [PATCH] There's a bug in the VC7 optimizer relating to the duff loop
 optimization

---
 src/video/SDL_blit.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/video/SDL_blit.h b/src/video/SDL_blit.h
index 605496f7f..7fde5d36a 100644
--- a/src/video/SDL_blit.h
+++ b/src/video/SDL_blit.h
@@ -375,7 +375,11 @@ do {						\
 } while(0)
 
 /* This is a very useful loop for optimizing blitters */
+#if defined(_MSC_VER) && (_MSC_VER == 1300)
+/* There's a bug in the Visual C++ 7 optimizer when compiling this code */
+#else
 #define USE_DUFFS_LOOP
+#endif
 #ifdef USE_DUFFS_LOOP
 
 /* 8-times unrolled loop */