improve const correctness.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45646 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 670a138..7e28307 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -1661,7 +1661,7 @@
for (std::map<Record*, DAGInstruction>::iterator II = Instructions.begin(),
E = Instructions.end(); II != E; ++II) {
DAGInstruction &TheInst = II->second;
- TreePattern *I = TheInst.getPattern();
+ const TreePattern *I = TheInst.getPattern();
if (I == 0) continue; // No pattern.
// FIXME: Assume only the first tree is the pattern. The others are clobber