diff options
Diffstat (limited to 'lib/VMCore/ConstantFold.cpp')
| -rw-r--r-- | lib/VMCore/ConstantFold.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp index 3a24389..ddd5587 100644 --- a/lib/VMCore/ConstantFold.cpp +++ b/lib/VMCore/ConstantFold.cpp @@ -1673,14 +1673,15 @@ Constant *llvm::ConstantFoldCompareInstruction(LLVMContext &Context, SmallVector<Constant*, 16> C1Elts, C2Elts; C1->getVectorElements(Context, C1Elts); C2->getVectorElements(Context, C2Elts); + if (C1Elts.empty() || C2Elts.empty()) + return 0; // If we can constant fold the comparison of each element, constant fold // the whole vector comparison. SmallVector<Constant*, 4> ResElts; for (unsigned i = 0, e = C1Elts.size(); i != e; ++i) { // Compare the elements, producing an i1 result or constant expr. - ResElts.push_back( - ConstantExpr::getCompare(pred, C1Elts[i], C2Elts[i])); + ResElts.push_back(ConstantExpr::getCompare(pred, C1Elts[i], C2Elts[i])); } return ConstantVector::get(&ResElts[0], ResElts.size()); } |
