[PATCH] D129715: [LoongArch] Optimize the loading of floating-point immediates

[Gong LingQin via Phabricator via llvm-commits]

gonglingqin created this revision.
gonglingqin added reviewers: xry111, SixWeining, MaskRay, xen0n.
Herald added subscribers: StephenFan, hiraditya.
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For example, when loading 1.0, use

  lu52i.d $a0, $zero, 0x3ff
  movgr2fr.d $fa0, $a0

instead of

  addi.d $a0, $zero, 1
  movgr2fr.d $fa0, $a0
  ffint.d.l $fa0, $fa0

Thanks to @xry111 for the suggestion: https://reviews.llvm.org/D128898#3632140


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D129715

Files:
  llvm/lib/Target/LoongArch/LoongArchFloat32InstrInfo.td
  llvm/lib/Target/LoongArch/LoongArchFloat64InstrInfo.td
  llvm/lib/Target/LoongArch/LoongArchISelDAGToDAG.cpp
  llvm/lib/Target/LoongArch/LoongArchISelDAGToDAG.h
  llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
  llvm/lib/Target/LoongArch/LoongArchISelLowering.h
  llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
  llvm/test/CodeGen/LoongArch/double-imm.ll
  llvm/test/CodeGen/LoongArch/float-imm.ll
  llvm/test/CodeGen/LoongArch/ir-instruction/double-convert.ll
  llvm/test/CodeGen/LoongArch/ir-instruction/float-convert.ll

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