[PATCH] D66483: [ARM] Generate 8.1-m CSINC, CSNEG and CSINV instructions.

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: rs, simon_tatham, t.p.northover, SjoerdMeijer, samparker, ostannard, efriedma.
Herald added subscribers: hiraditya, kristof.beyls, javed.absar.
Herald added a project: LLVM.

Arm 8.1-m added a number of related CSEL instructions, including CSINC, CSNEG and CSINV that choose between two values given the values in CPSR, performing an increment, negation or inverse of the false value.

This adds some selection for them, either from constant values or patterns. It doesn't include CSEL directly, which is currently making code larger, not better. It is still useful, but we will have to check more carefully where it should and shouldn't be used.

Code by Ranjeet Singh and Simon Tatham, with come modifications from me.


https://reviews.llvm.org/D66483

Files:
  llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
  llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/lib/Target/ARM/ARMISelLowering.h
  llvm/lib/Target/ARM/ARMInstrFormats.td
  llvm/lib/Target/ARM/ARMInstrInfo.td
  llvm/lib/Target/ARM/ARMInstrThumb2.td
  llvm/lib/Target/ARM/ARMInstructionSelector.cpp
  llvm/test/CodeGen/Thumb2/csel.ll
  llvm/test/CodeGen/Thumb2/mve-abs.ll
  llvm/test/CodeGen/Thumb2/mve-fmath.ll
  llvm/test/CodeGen/Thumb2/mve-minmax.ll
  llvm/test/CodeGen/Thumb2/mve-pred-and.ll
  llvm/test/CodeGen/Thumb2/mve-pred-build-var.ll
  llvm/test/CodeGen/Thumb2/mve-pred-ext.ll
  llvm/test/CodeGen/Thumb2/mve-pred-loadstore.ll
  llvm/test/CodeGen/Thumb2/mve-pred-not.ll
  llvm/test/CodeGen/Thumb2/mve-pred-or.ll
  llvm/test/CodeGen/Thumb2/mve-pred-xor.ll
  llvm/test/CodeGen/Thumb2/mve-vcmp.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpf.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpfr.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpfz.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpr.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpz.ll
  llvm/test/CodeGen/Thumb2/mve-vfma.ll

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