| commit | 0a70893bb86b38c8efb16c69c74afdfcd49e9942 | [log] [tgz] |
|---|---|---|
| author | Matt Arsenault <Matthew.Arsenault@amd.com> | Fri Sep 25 20:22:12 2015 +0000 |
| committer | Matt Arsenault <Matthew.Arsenault@amd.com> | Fri Sep 25 20:22:12 2015 +0000 |
| tree | 3a5a469e7cade46c93d1e5b2d66e4107257580d7 | |
| parent | de51d0d4490a7edd93f3f3af8851451821f75482 [diff] |
PeepholeOptimizer: Remove redundant copies If a virtual register is copied and another copy was already seen, replace with the previous copy. This only handles the simplest cases for now. This pattern shows up from various operand restrictions AMDGPU has which require inserting copies depending on the register class of the operands. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248611 91177308-0d34-0410-b5e6-96231b3b80d8