1b0b59ae43
Replace inttoptr (add (ptrtoint %B), %O) with (getelementptr i8, %B, %o) if all users are ICmp instruction, which in turn means only the address value is compared. We should be able to do this, if the src pointer, the integer type and the destination pointer types have the same bitwidth and address space. A common source of such (inttoptr (add (ptrtoint %B), %O)) is from various iterations in libc++. In practice this triggers in a number of files in Clang and various open source projects, including cppcheck, diamond, llama and more. Alive2 Proof with constant offset: https://alive2.llvm.org/ce/z/K_5N_B PR: https://github.com/llvm/llvm-project/pull/153421
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