[PATCH] D37899: [SystemZ] Implement shouldCoalesce() to help regalloc to avoid running out of registers with GR128 regs

[Jonas Paulsson via Phabricator via llvm-commits]

jonpa updated this revision to Diff 116811.
jonpa marked 2 inline comments as done.
jonpa added a comment.

Updated per review. Not much change on SPEC compared to last version of the patch:

  lg             :               318552               318542      -10
  st             :                51343                51348       +5
  cgijlh         :                17962                17958       -4
  ...
  Spill|Reload   :               165200               165200       +0

Test case for ADDR128 still missing.


https://reviews.llvm.org/D37899

Files:
  include/llvm/Target/TargetRegisterInfo.h
  lib/CodeGen/RegisterCoalescer.cpp
  lib/Target/AMDGPU/SIRegisterInfo.cpp
  lib/Target/AMDGPU/SIRegisterInfo.h
  lib/Target/ARM/ARMBaseRegisterInfo.cpp
  lib/Target/ARM/ARMBaseRegisterInfo.h
  lib/Target/SystemZ/SystemZRegisterInfo.cpp
  lib/Target/SystemZ/SystemZRegisterInfo.h
  test/CodeGen/SystemZ/regalloc-GR128.ll

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