[all-commits] [llvm/llvm-project] 082469: [AMDGPU] Fix WMM Entry SCC preservation

[Carl Ritson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0824694d68d3b4aa2d6c726e395516dd1387a718
      https://github.com/llvm/llvm-project/commit/0824694d68d3b4aa2d6c726e395516dd1387a718
  Author: Carl Ritson <carl.ritson at amd.com>
  Date:   2021-01-29 (Fri, 29 Jan 2021)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp
    M llvm/test/CodeGen/AMDGPU/wqm.mir

  Log Message:
  -----------
  [AMDGPU] Fix WMM Entry SCC preservation

SCC was not correctly preserved when entering WWM.
Current lit test was unable to detect this as entry block is
handled differently.
Additionally fix an issue where SCC was unnecessarily preserved
when exiting from WWM to Exact mode.

Reviewed By: foad

Differential Revision: https://reviews.llvm.org/D95500