[llvm] [PATCH] [Xtensa] Implement FrameLowering methods and stack operation lowering. (PR #92960)

[Matt Arsenault via llvm-commits]

================
@@ -534,13 +540,56 @@ SDValue XtensaTargetLowering::LowerConstantPool(ConstantPoolSDNode *CP,
   return getAddrPCRel(Result, DAG);
 }
 
+SDValue XtensaTargetLowering::LowerSTACKSAVE(SDValue Op,
+                                             SelectionDAG &DAG) const {
+  unsigned SP = Xtensa::SP;
+  return DAG.getCopyFromReg(Op.getOperand(0), SDLoc(Op), SP, Op.getValueType());
+}
+
+SDValue XtensaTargetLowering::LowerSTACKRESTORE(SDValue Op,
+                                                SelectionDAG &DAG) const {
+  unsigned SP = Xtensa::SP;
----------------
arsenm wrote:

No need for the variable 

https://github.com/llvm/llvm-project/pull/92960