[all-commits] [llvm/llvm-project] c4c379: [LoopStrengthReduction] Fix pointer extend asserts

[bcahoon via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c4c379d633a136d544436d01c77d75c094d90b12
      https://github.com/llvm/llvm-project/commit/c4c379d633a136d544436d01c77d75c094d90b12
  Author: Brendon Cahoon <brendon.cahoon at amd.com>
  Date:   2021-07-30 (Fri, 30 Jul 2021)

  Changed paths:
    M llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
    A llvm/test/Transforms/LoopStrengthReduce/AMDGPU/lsr-invalid-ptr-extend.ll

  Log Message:
  -----------
  [LoopStrengthReduction] Fix pointer extend asserts

Additional asserts were added to ScalarEvolution to enforce
pointer/int type rules. An assert is triggered when the LSR pass
attempts to extend a pointer SCEV in GenerateTruncates.

This patch changes GenerateTruncates to exit early if the Formaula
contains a ScaledReg or BaseReg with a pointer type.

Differential Revision: https://reviews.llvm.org/D107185