[PATCH] D52164: [InstSimplify] Fold ne/eq comparison of a pointer produced by a noalias function

[Hal Finkel via Phabricator via llvm-commits]

hfinkel added a comment.

In https://reviews.llvm.org/D52164#1237112, @xbolva00 wrote:

> int f(int n) {
>
>   int *x = (int *)malloc(n);
>   free(x);
>   int *y =  (int *)malloc(n);
>   return (y == x) ;
>
> }
>
> This has been already folded to true even before this patch.


You need to look at how this folding happens? Does it still happen if you actually use the allocation for something? We fold unused allocations away, as I recall.


Repository:
  rL LLVM

https://reviews.llvm.org/D52164