[llvm] [FunctionAttrs] Improve handling of alias-preserving intrinsic calls (PR #68453)

[Nikita Popov via llvm-commits]

================
@@ -654,7 +654,15 @@ determinePointerAccessAttrs(Argument *A,
       // must be a data operand (e.g. argument or operand bundle)
       const unsigned UseIndex = CB.getDataOperandNo(U);
 
-      if (!CB.doesNotCapture(UseIndex)) {
+      // Some intrinsics (for instance ptrmask) do not capture their results,
+      // but return results thas alias their pointer argument, and thus should
----------------
nikic wrote:

```suggestion
      // but return results that alias their pointer argument, and thus should
```

https://github.com/llvm/llvm-project/pull/68453