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-rw-r--r--llvm/lib/Target/X86/X86ISelLowering.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index c7f5ebfb98f..250af7ab8bc 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -39120,6 +39120,9 @@ combineMaskedLoadConstantMask(MaskedLoadSDNode *ML, SelectionDAG &DAG,
if (ML->getPassThru().isUndef())
return SDValue();
+ if (ISD::isBuildVectorAllZeros(ML->getPassThru().getNode()))
+ return SDValue();
+
// The new masked load has an undef pass-through operand. The select uses the
// original pass-through operand.
SDValue NewML = DAG.getMaskedLoad(VT, DL, ML->getChain(), ML->getBasePtr(),
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