[llvm] [TargetLowering] Improve one signature of forceExpandWideMUL. (PR #123991)

[Craig Topper via llvm-commits]

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@@ -10952,22 +10952,73 @@ void TargetLowering::forceExpandWideMUL(SelectionDAG &DAG, const SDLoc &dl,
                                         SDValue &Hi) const {
   EVT VT = LHS.getValueType();
   assert(RHS.getValueType() == VT && "Mismatching operand types");
+  EVT WideVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits() * 2);
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topperc wrote:

This is not currently used by vectors and probably needs more fixes to support vector.

https://github.com/llvm/llvm-project/pull/123991