[PATCH] D74935: [LangRef][AliasAnalysis] Clarify `noalias` affects only modified objects

[Jeroen Dobbelaere via Phabricator via llvm-commits]

jeroen.dobbelaere added a comment.

Be aware that c99 restrict has a special case for nested restrict that makes the rules stronger:

  void f(int* restrict *restrict pA, int* restrict * restrict pB) {
    **pA=**pB;
  }

although pA and pB are only read,  (c99 6.7.3.1 #4) specifies that, writing to **pA is as if you are also writing to *pA.
Which means for this case, that pA and pB will point to there own sets of objects, and because of that, *pA and *pB also point to their own (different) sets of objects.


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