[llvm] [FlattenCFG] Fix an Imprecise Usage of AA (PR #128117)

[Nikita Popov via llvm-commits]

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@@ -369,6 +369,22 @@ ModRefInfo AAResults::getModRefInfo(const CallBase *Call1,
   return Result;
 }
 
+// Check whether two instructions may read or write the same memory location.
+ModRefInfo AAResults::getModRefInfo(const Instruction *I1,
+                                    const Instruction *I2) {
+  SimpleAAQueryInfo AAQIP(*this);
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nikic wrote:

To clarify this bit: We should have a method taking AAQI, and another helper that uses SimplieAAQueryInfo and call the main method.

https://github.com/llvm/llvm-project/pull/128117