[clang] [llvm] [BasicAA] Do not decompose past casts with different index width (PR #119365)

[Arthur Eubanks via llvm-commits]

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@@ -594,9 +580,9 @@ BasicAAResult::DecomposeGEPExpression(const Value *V, const DataLayout &DL,
   SearchTimes++;
   const Instruction *CxtI = dyn_cast<Instruction>(V);
 
-  unsigned MaxIndexSize = DL.getMaxIndexSizeInBits();
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aeubanks wrote:

looks like `getMaxIndexSizeInBits()` is only used here

https://github.com/llvm/llvm-project/pull/119365