[all-commits] [llvm/llvm-project] e81819: [DSE] Eliminate zero memset after calloc

[Dávid Bolvanský via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e81819377ececef53d3e90743eeb44e6a089b65a
      https://github.com/llvm/llvm-project/commit/e81819377ececef53d3e90743eeb44e6a089b65a
  Author: Dávid Bolvanský <david.bolvansky at gmail.com>
  Date:   2021-04-28 (Wed, 28 Apr 2021)

  Changed paths:
    M llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
    M llvm/test/Transforms/DeadStoreElimination/noop-stores.ll

  Log Message:
  -----------
  [DSE] Eliminate zero memset after calloc

Solves PR11896

As noted, this can be improved futher (calloc -> malloc) in some cases. But for know, this is the first step.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D101391