1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index b020644d07e..d066d5c1077 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -5353,6 +5353,13 @@ static bool getTargetConstantBitsFromNode(SDValue Op, unsigned EltSizeInBits,
     return CastBitData(UndefSrcElts, SrcEltBits);
   }
 
+  // Extract scalar constant bits.
+  if (auto *Cst = dyn_cast<ConstantSDNode>(Op)) {
+    APInt UndefSrcElts = APInt::getNullValue(1);
+    SmallVector<APInt, 64> SrcEltBits(1, Cst->getAPIntValue());
+    return CastBitData(UndefSrcElts, SrcEltBits);
+  }
+
   // Extract constant bits from build vector.
   if (ISD::isBuildVectorOfConstantSDNodes(Op.getNode())) {
     unsigned SrcEltSizeInBits = VT.getScalarSizeInBits();