[llvm] [X86] Fix duplicated compute in recursive search. (PR #130226)

[Phoebe Wang via llvm-commits]

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@@ -44925,6 +44954,7 @@ static SDValue combineBitcastvxi1(SelectionDAG &DAG, EVT VT, SDValue Src,
   // (v16i8 shuffle <0,2,4,6,8,10,12,14,u,u,...,u> (v16i8 bitcast t0), undef)
   MVT SExtVT;
   bool PropagateSExt = false;
+  std::map<std::tuple<SDValue, unsigned, bool>, bool> BitcastSrcVectorSizeMap;
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phoebewang wrote:

DenseMap?

https://github.com/llvm/llvm-project/pull/130226