The initial SelectionDAG is naively peephole expanded from the LLVM input by -the SelectionDAGLowering class in the +
The initial SelectionDAG is naïvely peephole expanded from the LLVM +input by the SelectionDAGLowering class in the lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp file. The intent of this pass is to expose as much low-level, target-specific details to the SelectionDAG as possible. This pass is mostly hard-coded (e.g. an LLVM add turns