[PATCH] D14968: RegisterPressure: Make liveness tracking subregister aware

[Matthias Braun via llvm-commits]

MatzeB created this revision.
MatzeB added a reviewer: atrick.
MatzeB added a subscriber: llvm-commits.
MatzeB set the repository for this revision to rL LLVM.

Some comments:

- I did not see any compiletime impact of this change if subregister/lanemask tracking is disabled
- Compiletime when subregister/lanemask tracking is affected, this is because the only way to see which lanes are actually dead or use an undefined value is to perform a liveness query. Unfortunately we have to perform this query for each register operand.


Repository:
  rL LLVM

http://reviews.llvm.org/D14968

Files:
  include/llvm/CodeGen/MachineScheduler.h
  include/llvm/CodeGen/RegisterPressure.h
  lib/CodeGen/MachineScheduler.cpp
  lib/CodeGen/RegisterPressure.cpp

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D14968.41084.patch
Type: text/x-patch
Size: 42356 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20151124/4ad4b637/attachment.bin>