[PATCH] D36795: [SystemZ] Increase number of LOCRs emitted by passing regalloc hints

[Jonas Paulsson via Phabricator via llvm-commits]

jonpa updated this revision to Diff 122208.
jonpa added a comment.

Functions inlined per review.

patch impact on risb/locr instruction counts on SPEC as of latest performance measurement:

  risblg         :                 8624                 8442     -182
  locrhe         :                  926                  999      +73
  risbhg         :                 2057                 1995      -62
  locrl          :                 1626                 1658      +32
  locrle         :                  453                  482      +29
  locre          :                 1039                 1064      +25
  ...
  Spill|Reload   :               165135               165218      +83

--stats:

  1 systemz-II                   - Number of LOCRMux jump-sequences (lower is better)

(one LOCRMux not handled with patch, I think this is due to a regalloc eviction, which would be more complex to handle)


https://reviews.llvm.org/D36795

Files:
  include/llvm/Target/TargetRegisterInfo.h
  lib/CodeGen/AllocationOrder.cpp
  lib/CodeGen/AllocationOrder.h
  lib/CodeGen/TargetRegisterInfo.cpp
  lib/Target/ARM/ARMBaseRegisterInfo.cpp
  lib/Target/ARM/ARMBaseRegisterInfo.h
  lib/Target/SystemZ/SystemZInstrInfo.cpp
  lib/Target/SystemZ/SystemZRegisterInfo.cpp
  lib/Target/SystemZ/SystemZRegisterInfo.h
  test/CodeGen/SystemZ/cond-move-04.mir

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