[PATCH] D107828: [ARC] Add codegen for count trailing zeros intrinsic for the ARC backend

[Thomas Johnson via Phabricator via llvm-commits]

thomasjohns created this revision.
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This makes the `__builtin_ctz(x)` intrinsic generate `ffs.f %r, %r` (find first set) and `mov.eq  %r, 32` (conditional move) ARC instructions. This change also added the `ffs` instruction to tablegen with a disassembly test.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D107828

Files:
  llvm/lib/Target/ARC/ARCExpandPseudos.cpp
  llvm/lib/Target/ARC/ARCISelLowering.cpp
  llvm/lib/Target/ARC/ARCInstrInfo.td
  llvm/test/CodeGen/ARC/ctlz.ll
  llvm/test/CodeGen/ARC/intrinsics.ll
  llvm/test/MC/Disassembler/ARC/misc.txt

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