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-rw-r--r--llvm/lib/CodeGen/MIRParser/MIParser.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MIRParser/MIParser.cpp b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
index 6a464d9..4795d81 100644
--- a/llvm/lib/CodeGen/MIRParser/MIParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
@@ -2788,6 +2788,9 @@ bool MIParser::parseShuffleMaskOperand(MachineOperand &Dest) {
if (expectAndConsume(MIToken::rparen))
return error("shufflemask should be terminated by ')'.");
+ if (ShufMask.size() < 2)
+ return error("shufflemask should have > 1 element");
+
ArrayRef<int> MaskAlloc = MF.allocateShuffleMask(ShufMask);
Dest = MachineOperand::CreateShuffleMask(MaskAlloc);
return false;