[PATCH] D103215: [RISCV] Teach vsetvli insertion to use vsetvl x0, x0 form when we can tell that VLMAX and AVL haven't changed.
Craig Topper via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed May 26 16:44:45 PDT 2021
craig.topper created this revision.
craig.topper added reviewers: arcbbb, khchen, frasercrmck, HsiangKai, evandro, rogfer01.
Herald added subscribers: StephenFan, vkmr, luismarques, apazos, sameer.abuasal, s.egerton, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, edward-jones, zzheng, jrtc27, shiva0217, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, asb, hiraditya.
craig.topper requested review of this revision.
Herald added a subscriber: MaskRay.
Herald added a project: LLVM.
This can help avoid needing a virtual register for the vsetvl output
when the AVL is X0. For other register AVLs it can shorter the live
range of the AVL register if it isn't needed later.
There's probably no advantage when AVL is a 5 bit immediate that
can use vsetivli. But do it anyway for consistency.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D103215
Files:
llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.cpp
llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
llvm/test/CodeGen/RISCV/rvv/extload-truncstore.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extload-truncstore.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-buildvec.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-conv.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-setcc.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-shuffles.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp2i.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-i2fp.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert-i1.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert-subvector.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-exttrunc.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-shuffles.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-mask-buildvec.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-gather.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-scatter.ll
llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vselect.ll
llvm/test/CodeGen/RISCV/rvv/interleave-crash.ll
llvm/test/CodeGen/RISCV/rvv/legalize-scalable-vectortype.ll
llvm/test/CodeGen/RISCV/rvv/mgather-sdnode.ll
llvm/test/CodeGen/RISCV/rvv/mscatter-sdnode.ll
llvm/test/CodeGen/RISCV/rvv/named-vector-shuffle-reverse.ll
llvm/test/CodeGen/RISCV/rvv/saddo-sdnode.ll
llvm/test/CodeGen/RISCV/rvv/setcc-fp-rv32.ll
llvm/test/CodeGen/RISCV/rvv/setcc-fp-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vaadd-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vaaddu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vadd-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vand-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vasub-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vasubu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vdiv-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vdivu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vfcopysign-sdnode.ll
llvm/test/CodeGen/RISCV/rvv/vfpext-sdnode.ll
llvm/test/CodeGen/RISCV/rvv/vfptoi-sdnode.ll
llvm/test/CodeGen/RISCV/rvv/vfptrunc-sdnode.ll
llvm/test/CodeGen/RISCV/rvv/vitofp-sdnode.ll
llvm/test/CodeGen/RISCV/rvv/vlseg-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vlseg-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vlsseg-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vlsseg-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmacc-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmadd-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmax-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmaxu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmfeq-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmfeq-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmfge-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmfge-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmfgt-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmfgt-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmfle-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmfle-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmflt-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmflt-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmfne-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmfne-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmin-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vminu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmseq-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmseq-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmsge-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmsge-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmsgt-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmsgt-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmsgtu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmsgtu-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmsle-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmsle-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmsleu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmsleu-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmslt-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmslt-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmsltu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmsltu-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmsne-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmsne-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vmul-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmulh-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmulhsu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vmulhu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vnmsac-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vnmsub-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vor-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vrem-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vremu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vrsub-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vsadd-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vsaddu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vsetvli-insert-crossbb.mir
llvm/test/CodeGen/RISCV/rvv/vsetvli-insert.mir
llvm/test/CodeGen/RISCV/rvv/vsmul-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vssub-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vssubu-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vsub-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vtruncs-sdnode-rv32.ll
llvm/test/CodeGen/RISCV/rvv/vtruncs-sdnode-rv64.ll
llvm/test/CodeGen/RISCV/rvv/vxor-rv32.ll
llvm/test/CodeGen/RISCV/rvv/zvlsseg-zero-vl.ll
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