don't load element before checking to see if it is valid.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134836 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp
index 2c8f430176369fe4888f1f9cd804c4c2248bef28..adbf7fc08bc74da016a153da0fb024d7c0257ccd 100644 (file)
--- a/lib/VMCore/ConstantFold.cpp
+++ b/lib/VMCore/ConstantFold.cpp
@@ -2172,9 +2172,9 @@ static Constant *ConstantFoldGetElementPtrImpl(Constant *C,
                                                bool inBounds,
                                                IndexTy const *Idxs,
                                                unsigned NumIdx) {
+  if (NumIdx == 0) return C;
   Constant *Idx0 = cast<Constant>(Idxs[0]);
-  if (NumIdx == 0 ||
-      (NumIdx == 1 && Idx0->isNullValue()))
+  if ((NumIdx == 1 && Idx0->isNullValue()))
     return C;
 
   if (isa<UndefValue>(C)) {