[llvm] [Codegen][LegalizeIntegerTypes] Improve shift through stack (PR #96151)

[Matt Arsenault via llvm-commits]

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@@ -4574,20 +4584,29 @@ void DAGTypeLegalizer::ExpandIntRes_ShiftThroughStack(SDNode *N, SDValue &Lo,
     Init = DAG.getNode(ISD::BUILD_PAIR, dl, StackSlotVT, AllZeros, Shiftee);
   }
   // And spill it into the stack slot.
-  Ch = DAG.getStore(Ch, dl, Init, StackPtr, StackPtrInfo, StackSlotAlignment);
+  Ch = DAG.getStore(Ch, dl, Init, StackPtr, StackPtrInfo);
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arsenm wrote:

This store is not getting the correct alignment set. The stack alignment should be the next argument if using the MachinePointerInfo overloads 

https://github.com/llvm/llvm-project/pull/96151