[llvm] AlignmentFromAssumptions should not track the load result users (PR #73370)

[via llvm-commits]

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@@ -226,6 +223,8 @@ bool AlignmentFromAssumptionsPass::processAssumption(CallInst *ACall,
         LI->setAlignment(NewAlignment);
         ++NumLoadAlignChanged;
       }
+      // The user of a Load uses data - not a pointer!
+      AddUsers = false;
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alex-t wrote:

BTW everything except GEPs makes no sense since the code of the getNewAlignment function calls
`const SCEV *DiffSCEV = SE->getMinusSCEV(PtrSCEV, AASCEV);`
which in order uses the `getPointerBase(LHS) != getPointerBase(RHS)` to compare the pointer bases.
The getBasePointer function only tracks down through the  ADD operation, not PHI or "select" or "bitcast"


https://github.com/llvm/llvm-project/pull/73370