[all-commits] [llvm/llvm-project] 00a877: [DSE] Cache liveOnEntry as clobbering access

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 00a877f96af7da2723aedbb73918eeb2d38c960b
      https://github.com/llvm/llvm-project/commit/00a877f96af7da2723aedbb73918eeb2d38c960b
  Author: Philip Reames <listmail at philipreames.com>
  Date:   2022-03-03 (Thu, 03 Mar 2022)

  Changed paths:
    M llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp

  Log Message:
  -----------
  [DSE] Cache liveOnEntry as clobbering access

This builds on @fhahn's D112313, and caches the liveOnEntry node as a optimized access. D112313 tied to only cache a known clobber. This change adds caching the fact that no clobber exists. It still does not cache may-clobber results.

Differential Revision: https://reviews.llvm.org/D120842