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-rw-r--r--llvm/lib/Target/ARM/ARMISelLowering.cpp3
1 files changed, 1 insertions, 2 deletions
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index 01ee6a33c7c..524b84ec6f2 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -13706,8 +13706,7 @@ void ARMTargetLowering::computeKnownBitsForTargetNode(const SDValue Op,
if (Op.getOpcode() == ARMISD::VGETLANEs)
Known = Known.sext(DstSz);
else {
- Known = Known.zext(DstSz);
- Known.Zero.setBitsFrom(SrcSz);
+ Known = Known.zext(DstSz, true /* extended bits are known zero */);
}
assert(DstSz == Known.getBitWidth());
break;
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