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Use SUBREG_TO_REG instead of INSERT_SUBREG to model x86-64's
implicit zero-extend. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86196 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1949,14 +1949,12 @@ SDNode *X86DAGToDAGISel::Select(SDValue N) {
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0);
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// We just did a 32-bit clear, insert it into a 64-bit register to
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// clear the whole 64-bit reg.
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SDValue Undef =
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SDValue(CurDAG->getMachineNode(TargetInstrInfo::IMPLICIT_DEF,
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dl, MVT::i64), 0);
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SDValue Zero = CurDAG->getTargetConstant(0, MVT::i64);
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SDValue SubRegNo =
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CurDAG->getTargetConstant(X86::SUBREG_32BIT, MVT::i32);
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ClrNode =
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SDValue(CurDAG->getMachineNode(TargetInstrInfo::INSERT_SUBREG, dl,
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MVT::i64, Undef, ClrNode, SubRegNo),
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SDValue(CurDAG->getMachineNode(TargetInstrInfo::SUBREG_TO_REG, dl,
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MVT::i64, Zero, ClrNode, SubRegNo),
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0);
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} else {
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ClrNode = SDValue(CurDAG->getMachineNode(ClrOpcode, dl, NVT), 0);
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