[all-commits] [llvm/llvm-project] 328c86: [DSE, MSSA] Reorder DSE blocking checks.

[Florian Hahn via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 328c8642e2a089b2826e83b50dd971f91dd5fe73
      https://github.com/llvm/llvm-project/commit/328c8642e2a089b2826e83b50dd971f91dd5fe73
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2020-06-22 (Mon, 22 Jun 2020)

  Changed paths:
    M llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
    M llvm/test/Transforms/DeadStoreElimination/MSSA/simple.ll

  Log Message:
  -----------
  [DSE,MSSA] Reorder DSE blocking checks.

Currently we stop exploring candidates too early in some cases.

In particular, we can continue checking the defining accesses of
non-removable MemoryDefs and defs without analyzable write location
(read clobbers are already ruled out using MemorySSA at this point).