[PATCH] D29835: Correct PressureDiff calculation in presence of subregs

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec created this revision.
Herald added subscribers: nhaehnle, wdng, MatzeB.

If a subreg is used in an instruction it counts in the PressureDiff
as a whole superreg. This patch corrects improper register pressure
calculation by examining operand's lane mask.


Repository:
  rL LLVM

https://reviews.llvm.org/D29835

Files:
  include/llvm/CodeGen/RegisterPressure.h
  lib/CodeGen/MachineScheduler.cpp
  lib/CodeGen/RegisterPressure.cpp
  test/CodeGen/AMDGPU/schedule-regpressure.mir

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