Matthias Braun 2a43652f3b RegisterCoalescer: Don't rematerialize subregister definitions.
We cannot simply rematerialize instructions which only defining a
subregister, as the final value also depends on the previous
instructions.

This fixes test/CodeGen/R600/subreg-coalescer-bug.ll with subreg
liveness enabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229444 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-16 22:05:17 +00:00
..
2015-02-15 19:07:31 +00:00