[llvm] [Xtensa] Implement lowering Mul/Div/Shift operations. (PR #99981)

[Sergei Barannikov via llvm-commits]

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@@ -827,9 +1010,70 @@ XtensaTargetLowering::emitSelectCC(MachineInstr &MI,
 
 MachineBasicBlock *XtensaTargetLowering::EmitInstrWithCustomInserter(
     MachineInstr &MI, MachineBasicBlock *MBB) const {
+  const TargetInstrInfo &TII = *Subtarget.getInstrInfo();
+  DebugLoc DL = MI.getDebugLoc();
+
   switch (MI.getOpcode()) {
   case Xtensa::SELECT:
     return emitSelectCC(MI, MBB);
+  case Xtensa::SHL_P: {
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s-barannikov wrote:

Instruction selection should be done in `XtensaDAGToDAGISel::Select`.


https://github.com/llvm/llvm-project/pull/99981