[PATCH] D128572: [LoongArch] Add codegen support for division operations

[Lu Weining via Phabricator via llvm-commits]

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These operations include sdiv/udiv/srem/urem.

As the ISA [https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#_div_wudu_mod_wudu]
described, when the divisor is 0, the result can be any value, but no
exception will be triggered. Like what gcc does, we by default emit code
that checks divide-by-zero after the division or modulus instruction.
And this check can be disabled by passing the `-loongarch-no-check-zero-division`
option to llc.

Depends on D128433 <https://reviews.llvm.org/D128433>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D128572

Files:
  llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
  llvm/lib/Target/LoongArch/LoongArchISelLowering.h
  llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
  llvm/lib/Target/LoongArch/LoongArchMCInstLower.cpp
  llvm/test/CodeGen/LoongArch/ir-instruction/sdiv-udiv-srem-urem.ll

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