[llvm] [NFC][SelectionDAG] Move function `getStackAlignedMMO` to the beginning of LegalizeDAG.cpp (PR #82171)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-selectiondag

Author: Manish Kausik H (Nirhar)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/82171.diff


1 Files Affected:

- (modified) llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp (+13-13) 


``````````diff
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 892bfbd62f0d02..f3bb70fd0f779d 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -259,6 +259,19 @@ class SelectionDAGLegalize {
 
 } // end anonymous namespace
 
+// Helper function that generates an MMO that considers the alignment of the
+// stack, and the size of the stack object
+static MachineMemOperand *getStackAlignedMMO(SDValue StackPtr,
+                                             MachineFunction &MF,
+                                             bool isObjectScalable) {
+  auto &MFI = MF.getFrameInfo();
+  int FI = cast<FrameIndexSDNode>(StackPtr)->getIndex();
+  MachinePointerInfo PtrInfo = MachinePointerInfo::getFixedStack(MF, FI);
+  uint64_t ObjectSize = isObjectScalable ? ~UINT64_C(0) : MFI.getObjectSize(FI);
+  return MF.getMachineMemOperand(PtrInfo, MachineMemOperand::MOStore,
+                                 ObjectSize, MFI.getObjectAlign(FI));
+}
+
 /// Return a vector shuffle operation which
 /// performs the same shuffle in terms of order or result bytes, but on a type
 /// whose vector element type is narrower than the original shuffle type.
@@ -1378,19 +1391,6 @@ void SelectionDAGLegalize::LegalizeOp(SDNode *Node) {
   }
 }
 
-// Helper function that generates an MMO that considers the alignment of the
-// stack, and the size of the stack object
-static MachineMemOperand *getStackAlignedMMO(SDValue StackPtr,
-                                             MachineFunction &MF,
-                                             bool isObjectScalable) {
-  auto &MFI = MF.getFrameInfo();
-  int FI = cast<FrameIndexSDNode>(StackPtr)->getIndex();
-  MachinePointerInfo PtrInfo = MachinePointerInfo::getFixedStack(MF, FI);
-  uint64_t ObjectSize = isObjectScalable ? ~UINT64_C(0) : MFI.getObjectSize(FI);
-  return MF.getMachineMemOperand(PtrInfo, MachineMemOperand::MOStore,
-                                 ObjectSize, MFI.getObjectAlign(FI));
-}
-
 SDValue SelectionDAGLegalize::ExpandExtractFromVectorThroughStack(SDValue Op) {
   SDValue Vec = Op.getOperand(0);
   SDValue Idx = Op.getOperand(1);

``````````

</details>


https://github.com/llvm/llvm-project/pull/82171