[PATCH] D69346: [MIPS GlobalISel] Select MSA vector generic and builtin fabs

[Petar Avramovic via Phabricator via llvm-commits]

Petar.Avramovic created this revision.
Petar.Avramovic added reviewers: atanasyan, petarj.
Herald added subscribers: llvm-commits, jrtc27, hiraditya, arichardson, rovka, sdardis.
Herald added a project: LLVM.

selectImpl is able to select G_FABS when we set bank for
vector operands to fprb. Add detailed tests. 
Note: G_FABS is generated from llvm-ir intrinsics ‘llvm.fabs.*’,
and at the moment MIPS is not able to generate this intrinsic (some
targets generate ‘llvm.fabs.*’ form calls to a builtin function).
We can handle fabs using __builtin_msa_fmax_a_<format> and passing
same vector as both arguments. __builtin_msa_fmax_a_<format> will
be directly selected into FMAX_A_<format> in legalizeIntrinsic.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D69346

Files:
  llvm/lib/Target/Mips/MipsLegalizerInfo.cpp
  llvm/lib/Target/Mips/MipsRegisterBankInfo.cpp
  llvm/test/CodeGen/Mips/GlobalISel/instruction-select/fabs_vec.mir
  llvm/test/CodeGen/Mips/GlobalISel/legalizer/fabs_vec.mir
  llvm/test/CodeGen/Mips/GlobalISel/legalizer/fabs_vec_intrinsic.mir
  llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/fabs_vec.ll
  llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/fabs_vec_intrinsic.ll
  llvm/test/CodeGen/Mips/GlobalISel/regbankselect/fabs_vec.mir

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