[llvm-branch-commits] [llvm] [AMDGPULowerBufferFatPointers] Handle ptrtoaddr by extending the offset (PR #139413)

[Krzysztof Drewniak via llvm-branch-commits]

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@@ -1952,6 +1953,22 @@ PtrParts SplitPtrStructs::visitPtrToIntInst(PtrToIntInst &PI) {
   return {nullptr, nullptr};
 }
 
+PtrParts SplitPtrStructs::visitPtrToAddrInst(PtrToAddrInst &PA) {
+  Value *Ptr = PA.getPointerOperand();
+  if (!isSplitFatPtr(Ptr->getType()))
+    return {nullptr, nullptr};
+  IRB.SetInsertPoint(&PA);
+
+  auto [Rsrc, Off] = getPtrParts(Ptr);
+  Value *Res = IRB.CreateIntCast(Off, PA.getType(), /*isSigned=*/false,
+                                 PA.getName() + ".off");
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krzysz00 wrote:

We could probably leave the name off given that we'll be `takeName()`ing a moment later

https://github.com/llvm/llvm-project/pull/139413