Silence a warning.

Despite changing the order of evaluation, this doesn't actually change the
meaning of the statement.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60177 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/PostRASchedulerList.cpp b/lib/CodeGen/PostRASchedulerList.cpp
index c30cd61..09125d0 100644
--- a/lib/CodeGen/PostRASchedulerList.cpp
+++ b/lib/CodeGen/PostRASchedulerList.cpp
@@ -397,7 +397,7 @@
     // Determine AntiDepReg's register class, if it is live and is
     // consistently used within a single class.
     const TargetRegisterClass *RC = AntiDepReg != 0 ? Classes[AntiDepReg] : 0;
-    assert(AntiDepReg == 0 || RC != NULL &&
+    assert((AntiDepReg == 0 || RC != NULL) &&
            "Register should be live if it's causing an anti-dependence!");
     if (RC == reinterpret_cast<TargetRegisterClass *>(-1))
       AntiDepReg = 0;