[MemorySSA] Use fewer magic numbers. NFC

INVALID_MEMORYACCESS_ID == 0.

This patch also makes this initialization consistent with the rest of
the "invalid" ones in this file.

llvm-svn: 325935

diff --git a/llvm/include/llvm/Analysis/MemorySSA.h b/llvm/include/llvm/Analysis/MemorySSA.h
index 08f0bdc..b382e9a 100644 (file)
--- a/llvm/include/llvm/Analysis/MemorySSA.h
+++ b/llvm/include/llvm/Analysis/MemorySSA.h
@@ -331,7 +331,7 @@ protected:
 private:
   static void deleteMe(DerivedUser *Self);
 
-  unsigned int OptimizedID = 0;
+  unsigned OptimizedID = INVALID_MEMORYACCESS_ID;
 };
 
 template <>