[llvm-branch-commits] [compiler-rt] [TySan] Fix struct access with different bases (PR #108385)

[Tavian Barnes via llvm-branch-commits]

================
@@ -128,6 +128,10 @@ static bool isAliasingLegalUp(tysan_type_descriptor *TDA,
           break;
       }
 
+      //You can't have negative offset, you must be partially inside the last type
+      if (TDA->Struct.Members[Idx].Offset > OffsetA)
+        Idx -=1;
+        
----------------
tavianator wrote:

```suggestion
        Idx -= 1;

```

https://github.com/llvm/llvm-project/pull/108385