[llvm] [DA] do not handle array accesses of different offsets (PR #123436)

[Michael Kruse via llvm-commits]

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@@ -3649,6 +3646,111 @@ DependenceInfo::depends(Instruction *Src, Instruction *Dst) {
     LLVM_DEBUG(dbgs() << "can't analyze SCEV with different pointer base\n");
     return std::make_unique<Dependence>(Src, Dst);
   }
+
+  auto EltSize = SrcLoc.Size.toRaw();
+  assert(EltSize == DstLoc.Size.toRaw() && "Array element size differ");
+
+  // Check that memory access offsets in V are multiples of array EltSize.
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Meinersbur wrote:

Please elaborate more. What is the assumed base ptr? What is is `Param`. Where does EltSize come from?

https://github.com/llvm/llvm-project/pull/123436