[llvm] [llubi] Add support for constant expressions (PR #203746)

[Nikita Popov via llvm-commits]

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@@ -89,12 +91,9 @@ std::optional<AnyValue> Context::getConstantValueImpl(Constant *C) {
   if (isa<PoisonValue>(C))
     return AnyValue::getPoisonValue(*this, C->getType());
 
-  if (isa<ConstantAggregateZero>(C))
+  if (isa<ConstantAggregateZero, ConstantPointerNull>(C))
     return AnyValue::getNullValue(*this, C->getType());
 
-  if (isa<ConstantPointerNull>(C))
-    return Pointer::null(C->getType()->getPointerAddressSpace(), DL);
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nikic wrote:

I wouldn't combine these cases given that recently non-zero null pointers were introduced...

https://github.com/llvm/llvm-project/pull/203746