[all-commits] [llvm/llvm-project] 6df632: [ValueTracking] isNonEqual Pointers with with a re...

[bipmis via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6df63203749200e09199577a7646442f77fc67ce
      https://github.com/llvm/llvm-project/commit/6df63203749200e09199577a7646442f77fc67ce
  Author: bipmis <102525366+bipmis at users.noreply.github.com>
  Date:   2023-12-15 (Fri, 15 Dec 2023)

  Changed paths:
    M llvm/lib/Analysis/ValueTracking.cpp
    M llvm/test/Analysis/ValueTracking/known-non-equal.ll
    M llvm/test/Analysis/ValueTracking/phi-known-bits.ll
    M llvm/test/Transforms/InstCombine/sub-gep.ll

  Log Message:
  -----------
  [ValueTracking] isNonEqual Pointers with with a recursive GEP (#70459)

Handles canonical icmp eq(ptr1, ptr2) -> where ptr1/ptr2 is a recursive
GEP.
Can helps scenarios where InstCombineCompares folds icmp eq(sub(ptr2int,
ptr2int), 0) -> icmp eq(ptr1, ptr2)
and
icmp eq(phi(sub(ptr2int, ptr2int), ...)) -> phi i1 (icmp eq(sub(ptr2int,
ptr2int), 0), ....)