Craig Topper 8c9724ea4f [SelectionDAG] Add a OPC_CheckChild2CondCode to SelectionDAGISel to remove a MoveChild and MoveParent pair. ...

OPC_CheckCondCode is always used as operand 2 of a setcc. And its always surrounded by a MoveChild2 and a MoveParent. By having a dedicated opcode for this case we can reduce the number of bytes needed for this pattern from 4 bytes to 2.

This saves ~3000 bytes in the X86 table.

llvm-svn: 354763

2019-02-25 03:11:44 +00:00

17 KiB

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