[all-commits] [llvm/llvm-project] 547e3c: [AMDGPU] Improve liveness copying in si-optimize-e...

[Carl Ritson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 547e3cba7d166286c3c4ce477998a81ebbed6921
      https://github.com/llvm/llvm-project/commit/547e3cba7d166286c3c4ce477998a81ebbed6921
  Author: Carl Ritson <carl.ritson at amd.com>
  Date:   2022-07-17 (Sun, 17 Jul 2022)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIOptimizeExecMaskingPreRA.cpp
    A llvm/test/CodeGen/AMDGPU/optimize-exec-mask-pre-ra-alloc-failure.mir

  Log Message:
  -----------
  [AMDGPU] Improve liveness copying in si-optimize-exec-masking-pre-ra

Further improve liveness copying for CC register post optimization
by mirroring live internal splits.
The fixes a bug in register allocation when CC register liveness
is extended across a branches instead of split.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D129557