[llvm] [X86] Lower mathlib call ldexp into scalef when avx512 is enabled (PR #69710)

[Simon Pilgrim via llvm-commits]

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@@ -1705,6 +1705,8 @@ namespace llvm {
                         const SmallVectorImpl<SDValue> &OutVals,
                         const SDLoc &dl, SelectionDAG &DAG) const override;
 
+    SDValue LowerFLDEXP(SDValue Op, SelectionDAG &DAG) const;
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RKSimon wrote:

no need to create a method - just make it static inside X86ISelLowering.cpp

https://github.com/llvm/llvm-project/pull/69710