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22310389fc
Summary: 1. Don't try to copy values to and from the same register class. 2. Replace copies with of registers with immediate values with v_mov/s_mov instructions. The main purpose of this change is to make MachineSink do a better job of determining when it is beneficial to split a critical edge, since the pass assumes that copies will become move instructions. This prevents a regression in uniform-cfg.ll if we enable critical edge splitting for AMDGPU. Reviewers: arsenm Subscribers: arsenm, kzhuravl, llvm-commits Differential Revision: https://reviews.llvm.org/D23408 llvm-svn: 287131 |
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