diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index ed975e9248a..9e628584571 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -33026,6 +33026,9 @@ static SDValue combineX86ShufflesRecursively( ArrayRef<int> RootMask, ArrayRef<const SDNode *> SrcNodes, unsigned Depth, bool HasVariableMask, bool AllowVariableMask, SelectionDAG &DAG, const X86Subtarget &Subtarget) { + assert(RootMask.size() > 0 && (RootMask.size() > 1 || RootMask[0] == 0) && + "Illegal shuffle root mask"); + // Bound the depth of our recursive combine because this is ultimately // quadratic in nature. const unsigned MaxRecursionDepth = 8; |
