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-rw-r--r--llvm/lib/Target/SystemZ/SystemZISelLowering.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
index 0ca8bcd2df4..c0faa911784 100644
--- a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
@@ -1530,6 +1530,8 @@ static void adjustForTestUnderMask(SelectionDAG &DAG, Comparison &C) {
MaskVal = -(CmpVal & -CmpVal);
NewC.ICmpType = SystemZICMP::UnsignedOnly;
}
+ if (!MaskVal)
+ return;
// Check whether the combination of mask, comparison value and comparison
// type are suitable.
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