[all-commits] [llvm/llvm-project] 3c7e7d: [BasicAA] Enable -basic-aa-recphi by default

[David Green via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 3c7e7d40a996f998dfe3c36abb70accdf4f20d79
      https://github.com/llvm/llvm-project/commit/3c7e7d40a996f998dfe3c36abb70accdf4f20d79
  Author: David Green <david.green at arm.com>
  Date:   2020-08-04 (Tue, 04 Aug 2020)

  Changed paths:
    M llvm/lib/Analysis/BasicAliasAnalysis.cpp
    M llvm/test/Analysis/BasicAA/phi-loop.ll
    M llvm/test/Analysis/BasicAA/recphi.ll
    M llvm/test/Transforms/LoopIdiom/reuse-cast.ll

  Log Message:
  -----------
  [BasicAA] Enable -basic-aa-recphi by default

This option was added a while back, to help improve AA around pointer
phi loops. It looks for phi(gep(phi, const), x) loops, checking if x can
then prove more precise aliasing info.

Differential Revision: https://reviews.llvm.org/D82998