Fixing an infinite loop problem in InstCombine
Patch by Mohammad Fawaz This issues started happening after https://github.com/llvm/llvm-project/commit/b373b5990d5991a920c421b21a352e4ccf4c4993 Basically, if the memcpy is volatile, the collectUsers() function should return false, just like we do for volatile loads. Differential Revision: https://reviews.llvm.org/D106950
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