[PATCH] D11174: [BranchFolding] do not iterate the aliases of virtual registers

[Jingyue Wu]

jingyue created this revision.
jingyue added reviewers: bkramer, jholewinski.
jingyue added subscribers: llvm-commits, meheff, henryhu.
Herald added a subscriber: jholewinski.

MCRegAliasIterator only works for physical registers. So, do not run it
on virtual registers.

With this issue fixed, we can resurrect the BranchFolding pass in NVPTX
backend.

http://reviews.llvm.org/D11174

Files:
  lib/CodeGen/BranchFolding.cpp
  lib/Target/NVPTX/NVPTXTargetMachine.cpp
  test/CodeGen/NVPTX/branch-fold.ll

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