[PATCH] D37698: Add target callback areMemOpsHaveSameBasePtr

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec created this revision.
Herald added subscribers: javed.absar, nhaehnle, arsenm.

MachineScheduler when clustering loads or stores checks if base
pointers point to the same memory. This check is done through
comparison of base registers of two memory instructions. This
works fine when instructions have separate offset operand. If
they require a full calculated pointer such instructions can
never be clustered according to such logic.

Implemented the new target callback providing an opportunity to
perform necessary more complicated checks in such case.


https://reviews.llvm.org/D37698

Files:
  include/llvm/Target/TargetInstrInfo.h
  lib/CodeGen/MachineScheduler.cpp
  lib/Target/AMDGPU/SIInstrInfo.cpp
  lib/Target/AMDGPU/SIInstrInfo.h
  test/CodeGen/AMDGPU/add.i16.ll
  test/CodeGen/AMDGPU/ctpop.ll
  test/CodeGen/AMDGPU/fadd.f16.ll
  test/CodeGen/AMDGPU/flat-load-clustering.mir
  test/CodeGen/AMDGPU/si-triv-disjoint-mem-access.ll
  test/CodeGen/AMDGPU/sub.i16.ll

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