[llvm] [StackSafetyAnalysis] Don't call getTruncateOrZeroExtend for pointers of different sizes (PR #79804)

[Nikita Popov via llvm-commits]

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@@ -273,6 +273,17 @@ ConstantRange StackSafetyLocalAnalysis::offsetFrom(Value *Addr, Value *Base) {
     return UnknownRange;
 
   auto *PtrTy = PointerType::getUnqual(SE.getContext());
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nikic wrote:

I'd expect any fix to this to at least remove all the getTruncateOrZeroExtend() calls on pointer SCEVS in this pass, as that fundamentally never makes sense.

https://github.com/llvm/llvm-project/pull/79804