[PATCH] D143302: [AMDGPU] Fix liveness in the SIOptimizeExecMaskingPreRA.cpp

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

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If a condition register def happens past the newly created use
we do not properly update LIS. It has two problems:

1. We do not extend defining segment to the end of its block

marking it a live-out (this is regression after
https://reviews.llvm.org/rG09d38dd7704a52e8ad2d5f8f39aaeccf107f4c56)

2. We do not extend use segment to the beginning of the use block

marking it a live-in.


https://reviews.llvm.org/D143302

Files:
  llvm/lib/Target/AMDGPU/SIOptimizeExecMaskingPreRA.cpp
  llvm/test/CodeGen/AMDGPU/optimize-exec-mask-pre-ra-def-after-use.mir

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