[llvm] [TargetLowering] Refactor to share most of the implementation of the two forceExpandWideMUL functions. NFC (PR #124241)

[via llvm-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff 886adf8fb3ba5ec358a9a4fbe87e4da6b3ae8973 0f0c16114254b3675bc25f60b827dd0c61db4da9 --extensions cpp,h -- llvm/include/llvm/CodeGen/TargetLowering.h llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
``````````

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 523a55781b..daa52ec74f 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -10939,18 +10939,18 @@ void TargetLowering::forceExpandWideMUL(SelectionDAG &DAG, const SDLoc &dl,
     return;
   }
 
-    SDValue HiLHS, HiRHS;
-    if (Signed) {
-      // The high part is obtained by SRA'ing all but one of the bits of low
-      // part.
-      unsigned LoSize = VT.getFixedSizeInBits();
-      SDValue Shift = DAG.getShiftAmountConstant(LoSize - 1, VT, dl);
-      HiLHS = DAG.getNode(ISD::SRA, dl, VT, LHS, Shift);
-      HiRHS = DAG.getNode(ISD::SRA, dl, VT, RHS, Shift);
-    } else {
-      HiLHS = DAG.getConstant(0, dl, VT);
-      HiRHS = DAG.getConstant(0, dl, VT);
-    }
+  SDValue HiLHS, HiRHS;
+  if (Signed) {
+    // The high part is obtained by SRA'ing all but one of the bits of low
+    // part.
+    unsigned LoSize = VT.getFixedSizeInBits();
+    SDValue Shift = DAG.getShiftAmountConstant(LoSize - 1, VT, dl);
+    HiLHS = DAG.getNode(ISD::SRA, dl, VT, LHS, Shift);
+    HiRHS = DAG.getNode(ISD::SRA, dl, VT, RHS, Shift);
+  } else {
+    HiLHS = DAG.getConstant(0, dl, VT);
+    HiRHS = DAG.getConstant(0, dl, VT);
+  }
 
     // Attempt a libcall.
     SDValue Ret;

``````````

</details>


https://github.com/llvm/llvm-project/pull/124241