diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp b/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp index 65a96b96522..aeac8910af6 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp @@ -181,11 +181,13 @@ Instruction *InstCombiner::visitExtractElementInst(ExtractElementInst &EI) { // If extracting a specified index from the vector, see if we can recursively // find a previously computed scalar that was inserted into the vector. if (ConstantInt *IdxC = dyn_cast<ConstantInt>(EI.getOperand(1))) { - unsigned IndexVal = IdxC->getZExtValue(); unsigned VectorWidth = EI.getVectorOperandType()->getNumElements(); - // InstSimplify handles cases where the index is invalid. - assert(IndexVal < VectorWidth); + // InstSimplify should handle cases where the index is invalid. + if (!IdxC->getValue().ule(VectorWidth)) + return nullptr; + + unsigned IndexVal = IdxC->getZExtValue(); // This instruction only demands the single element from the input vector. // If the input vector has a single use, simplify it based on this use |
