[all-commits] [llvm/llvm-project] 859c87: [RISCV] Default to MicroOpBufferSize = 1 for sched...

Philip Reames via All-commits all-commits at lists.llvm.org
Wed Feb 12 12:32:02 PST 2025 

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 859c871184bdfdebb47b5c7ec5e59348e0534e0b
      https://github.com/llvm/llvm-project/commit/859c871184bdfdebb47b5c7ec5e59348e0534e0b
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2025-02-12 (Wed, 12 Feb 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVProcessors.td
    M llvm/test/CodeGen/RISCV/GlobalISel/add-imm.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/combine-neg-abs.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/double-arith.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/float-arith.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/freeze.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/rotl-rotr.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/rv64zbb.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/rv64zbkb.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/shifts.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/stacksave-stackrestore.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/vararg.ll
    M llvm/test/CodeGen/RISCV/GlobalISel/wide-scalar-shift-by-byte-multiple-legalization.ll
    M llvm/test/CodeGen/RISCV/abds-neg.ll
    M llvm/test/CodeGen/RISCV/abds.ll
    M llvm/test/CodeGen/RISCV/abdu-neg.ll
    M llvm/test/CodeGen/RISCV/abdu.ll
    M llvm/test/CodeGen/RISCV/add-before-shl.ll
    M llvm/test/CodeGen/RISCV/add-imm.ll
    M llvm/test/CodeGen/RISCV/alloca.ll
    M llvm/test/CodeGen/RISCV/alu64.ll
    M llvm/test/CodeGen/RISCV/atomic-rmw-discard.ll
    M llvm/test/CodeGen/RISCV/atomic-rmw.ll
    M llvm/test/CodeGen/RISCV/atomic-signext.ll
    M llvm/test/CodeGen/RISCV/atomicrmw-cond-sub-clamp.ll
    M llvm/test/CodeGen/RISCV/atomicrmw-uinc-udec-wrap.ll
    M llvm/test/CodeGen/RISCV/bf16-promote.ll
    M llvm/test/CodeGen/RISCV/bfloat-convert.ll
    M llvm/test/CodeGen/RISCV/bfloat-mem.ll
    M llvm/test/CodeGen/RISCV/bfloat.ll
    M llvm/test/CodeGen/RISCV/bittest.ll
    M llvm/test/CodeGen/RISCV/branch-on-zero.ll
    M llvm/test/CodeGen/RISCV/callee-saved-fpr32s.ll
    M llvm/test/CodeGen/RISCV/callee-saved-fpr64s.ll
    M llvm/test/CodeGen/RISCV/callee-saved-gprs.ll
    M llvm/test/CodeGen/RISCV/calling-conv-half.ll
    M llvm/test/CodeGen/RISCV/calling-conv-ilp32-ilp32f-common.ll
    M llvm/test/CodeGen/RISCV/calling-conv-ilp32-ilp32f-ilp32d-common.ll
    M llvm/test/CodeGen/RISCV/calling-conv-ilp32.ll
    M llvm/test/CodeGen/RISCV/calling-conv-ilp32d.ll
    M llvm/test/CodeGen/RISCV/calling-conv-ilp32e.ll
    M llvm/test/CodeGen/RISCV/calling-conv-ilp32f-ilp32d-common.ll
    M llvm/test/CodeGen/RISCV/calling-conv-lp64-lp64f-lp64d-common.ll
    M llvm/test/CodeGen/RISCV/calling-conv-lp64.ll
    M llvm/test/CodeGen/RISCV/calling-conv-lp64e.ll
    M llvm/test/CodeGen/RISCV/calling-conv-rv32f-ilp32.ll
    M llvm/test/CodeGen/RISCV/calling-conv-rv32f-ilp32e.ll
    M llvm/test/CodeGen/RISCV/calls.ll
    M llvm/test/CodeGen/RISCV/codemodel-lowering.ll
    M llvm/test/CodeGen/RISCV/condbinops.ll
    M llvm/test/CodeGen/RISCV/condops.ll
    M llvm/test/CodeGen/RISCV/copysign-casts.ll
    M llvm/test/CodeGen/RISCV/ctlz-cttz-ctpop.ll
    M llvm/test/CodeGen/RISCV/double-calling-conv.ll
    M llvm/test/CodeGen/RISCV/double-convert.ll
    M llvm/test/CodeGen/RISCV/double-fcmp-strict.ll
    M llvm/test/CodeGen/RISCV/double-imm.ll
    M llvm/test/CodeGen/RISCV/double-mem.ll
    M llvm/test/CodeGen/RISCV/double-round-conv-sat.ll
    M llvm/test/CodeGen/RISCV/double-select-fcmp.ll
    M llvm/test/CodeGen/RISCV/double-stack-spill-restore.ll
    M llvm/test/CodeGen/RISCV/fastcc-bf16.ll
    M llvm/test/CodeGen/RISCV/fastcc-float.ll
    M llvm/test/CodeGen/RISCV/fastcc-half.ll
    M llvm/test/CodeGen/RISCV/fastcc-without-f-reg.ll
    M llvm/test/CodeGen/RISCV/float-convert.ll
    M llvm/test/CodeGen/RISCV/float-fcmp-strict.ll
    M llvm/test/CodeGen/RISCV/float-select-fcmp.ll
    M llvm/test/CodeGen/RISCV/fold-addi-loadstore.ll
    M llvm/test/CodeGen/RISCV/forced-atomics.ll
    M llvm/test/CodeGen/RISCV/fp-fcanonicalize.ll
    M llvm/test/CodeGen/RISCV/fp128.ll
    M llvm/test/CodeGen/RISCV/fpclamptosat.ll
    M llvm/test/CodeGen/RISCV/get-setcc-result-type.ll
    M llvm/test/CodeGen/RISCV/half-arith.ll
    M llvm/test/CodeGen/RISCV/half-convert-strict.ll
    M llvm/test/CodeGen/RISCV/half-convert.ll
    M llvm/test/CodeGen/RISCV/half-fcmp-strict.ll
    M llvm/test/CodeGen/RISCV/half-intrinsics.ll
    M llvm/test/CodeGen/RISCV/half-mem.ll
    M llvm/test/CodeGen/RISCV/half-select-fcmp.ll
    M llvm/test/CodeGen/RISCV/iabs.ll
    M llvm/test/CodeGen/RISCV/inline-asm-d-constraint-f.ll
    M llvm/test/CodeGen/RISCV/inline-asm-d-modifier-N.ll
    M llvm/test/CodeGen/RISCV/inline-asm-f-constraint-f.ll
    M llvm/test/CodeGen/RISCV/inline-asm-f-modifier-N.ll
    M llvm/test/CodeGen/RISCV/inline-asm-zfinx-constraint-r.ll
    M llvm/test/CodeGen/RISCV/inline-asm-zhinx-constraint-r.ll
    M llvm/test/CodeGen/RISCV/inline-asm.ll
    M llvm/test/CodeGen/RISCV/intrinsic-cttz-elts-vscale.ll
    M llvm/test/CodeGen/RISCV/legalize-fneg.ll
    M llvm/test/CodeGen/RISCV/llvm.exp10.ll
    M llvm/test/CodeGen/RISCV/llvm.frexp.ll
    M llvm/test/CodeGen/RISCV/loop-strength-reduce-add-cheaper-than-mul.ll
    M llvm/test/CodeGen/RISCV/machine-sink-load-immediate.ll
    M llvm/test/CodeGen/RISCV/machinelicm-address-pseudos.ll
    M llvm/test/CodeGen/RISCV/macro-fusion-lui-addi.ll
    M llvm/test/CodeGen/RISCV/mem.ll
    M llvm/test/CodeGen/RISCV/mem64.ll
    M llvm/test/CodeGen/RISCV/memcmp-optsize.ll
    M llvm/test/CodeGen/RISCV/memcmp.ll
    M llvm/test/CodeGen/RISCV/memmove.ll
    M llvm/test/CodeGen/RISCV/memset-pattern.ll
    M llvm/test/CodeGen/RISCV/mul.ll
    M llvm/test/CodeGen/RISCV/neg-abs.ll
    M llvm/test/CodeGen/RISCV/orc-b-patterns.ll
    M llvm/test/CodeGen/RISCV/overflow-intrinsics.ll
    M llvm/test/CodeGen/RISCV/pr51206.ll
    M llvm/test/CodeGen/RISCV/pr58511.ll
    M llvm/test/CodeGen/RISCV/pr63816.ll
    M llvm/test/CodeGen/RISCV/pr69586.ll
    M llvm/test/CodeGen/RISCV/push-pop-popret.ll
    M llvm/test/CodeGen/RISCV/riscv-codegenprepare-asm.ll
    M llvm/test/CodeGen/RISCV/rotl-rotr.ll
    M llvm/test/CodeGen/RISCV/rv32-inline-asm-pairs.ll
    M llvm/test/CodeGen/RISCV/rv32zbb.ll
    M llvm/test/CodeGen/RISCV/rv32zbs.ll
    M llvm/test/CodeGen/RISCV/rv64-double-convert.ll
    M llvm/test/CodeGen/RISCV/rv64-half-convert.ll
    M llvm/test/CodeGen/RISCV/rv64-inline-asm-pairs.ll
    M llvm/test/CodeGen/RISCV/rv64-trampoline.ll
    M llvm/test/CodeGen/RISCV/rv64i-demanded-bits.ll
    M llvm/test/CodeGen/RISCV/rv64zbkb.ll
    M llvm/test/CodeGen/RISCV/rvv/active_lane_mask.ll
    M llvm/test/CodeGen/RISCV/rvv/alloca-load-store-scalable-array.ll
    M llvm/test/CodeGen/RISCV/rvv/alloca-load-store-scalable-struct.ll
    M llvm/test/CodeGen/RISCV/rvv/bitreverse-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/bitreverse-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/bswap-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/bswap-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/calling-conv-fastcc.ll
    M llvm/test/CodeGen/RISCV/rvv/calling-conv.ll
    M llvm/test/CodeGen/RISCV/rvv/ceil-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/combine-store-extract-crash.ll
    M llvm/test/CodeGen/RISCV/rvv/concat-vector-insert-elt.ll
    M llvm/test/CodeGen/RISCV/rvv/constant-folding-crash.ll
    M llvm/test/CodeGen/RISCV/rvv/copyprop.mir
    M llvm/test/CodeGen/RISCV/rvv/ctlz-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/ctlz-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/cttz-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/cttz-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/dont-sink-splat-operands.ll
    M llvm/test/CodeGen/RISCV/rvv/double-round-conv.ll
    M llvm/test/CodeGen/RISCV/rvv/expandload.ll
    M llvm/test/CodeGen/RISCV/rvv/extractelt-fp.ll
    M llvm/test/CodeGen/RISCV/rvv/extractelt-i1.ll
    M llvm/test/CodeGen/RISCV/rvv/extractelt-int-rv64.ll
    M llvm/test/CodeGen/RISCV/rvv/fceil-constrained-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fceil-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/ffloor-constrained-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/ffloor-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vector-i8-index-cornercase.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-abs-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bitcast-large-vector.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bitreverse-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bswap-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-buildvec-of-binop.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-calling-conv-fastcc.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-calling-conv.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ceil-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctlz-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctpop-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctpop.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-cttz-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-cttz.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-deinterleave-load.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-elen.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extload-truncstore.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extract-i1.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extract-subvector.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extract.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fceil-constrained-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ffloor-constrained-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-floor-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fmaximum-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fmaximum.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fminimum-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fminimum.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fnearbyint-constrained-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-buildvec.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-interleave.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-setcc.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-shuffles.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-vrgather.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fpext-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fpowi.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fptosi-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fptoui-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fptrunc-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fround-constrained-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fround.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-froundeven-constrained-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-froundeven.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert-subvector.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-buildvec.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-interleave.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-shuffles.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-vrgather.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-interleaved-access-zve32x.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-interleaved-access.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-llrint.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-lrint.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-mask-buildvec.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-mask-splat.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-gather.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-load-fp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-load-int.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-scatter.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-store-fp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-store-int.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-nearbyint-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-formation.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-fp-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-fp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-int-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-int.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-rint-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-round-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-roundeven-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-roundtozero-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-select-addsub.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-setcc-fp-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-setcc-int-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-sext-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-shuffle-changes-length.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-shuffle-concat.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-shuffle-deinterleave.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-shuffle-exact-vlen.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-shuffle-reverse.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-shufflevector-vnsrl.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-sitofp-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-store-merge-crash.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-strided-load-store-asm.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-strided-vpload.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-strided-vpstore.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-trunc-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-uitofp-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-unaligned.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vadd-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vcopysign-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfabs-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfma-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfmax-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfmin-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfmuladd-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfneg-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfsqrt-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vmax-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vmaxu-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vmin-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vminu-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vpgather.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vpload.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vpmerge.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vpscatter.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vpstore.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vsadd-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vsaddu-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vscale-range.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vselect-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vselect.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vssub-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vssubu-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwadd-mask.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwadd.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwaddu.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwmul.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwmulsu.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwmulu.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwsub-mask.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwsub.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwsubu.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-zext-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/float-round-conv.ll
    M llvm/test/CodeGen/RISCV/rvv/floor-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fmaximum-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fmaximum-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fminimum-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fminimum-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fnearbyint-constrained-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fnearbyint-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fold-scalar-load-crash.ll
    M llvm/test/CodeGen/RISCV/rvv/fold-vector-cmp.ll
    M llvm/test/CodeGen/RISCV/rvv/fpclamptosat_vec.ll
    M llvm/test/CodeGen/RISCV/rvv/frm-insert.ll
    M llvm/test/CodeGen/RISCV/rvv/fround-constrained-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fround-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/froundeven-constrained-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/froundeven-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/fshr-fshl-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/half-round-conv.ll
    M llvm/test/CodeGen/RISCV/rvv/localvar.ll
    M llvm/test/CodeGen/RISCV/rvv/memcpy-inline.ll
    M llvm/test/CodeGen/RISCV/rvv/memory-args.ll
    M llvm/test/CodeGen/RISCV/rvv/mgather-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/mscatter-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/mutate-prior-vsetvli-avl.ll
    M llvm/test/CodeGen/RISCV/rvv/named-vector-shuffle-reverse.ll
    M llvm/test/CodeGen/RISCV/rvv/nearbyint-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/no-reserved-frame.ll
    M llvm/test/CodeGen/RISCV/rvv/pr125306.ll
    M llvm/test/CodeGen/RISCV/rvv/pr63596.ll
    M llvm/test/CodeGen/RISCV/rvv/pr95865.ll
    M llvm/test/CodeGen/RISCV/rvv/reg-alloc-reserve-bp.ll
    M llvm/test/CodeGen/RISCV/rvv/round-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/roundeven-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/roundtozero-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/rvv-args-by-mem.ll
    M llvm/test/CodeGen/RISCV/rvv/rvv-peephole-vmerge-vops.ll
    M llvm/test/CodeGen/RISCV/rvv/setcc-fp-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/setcc-int-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/shrinkwrap.ll
    M llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll
    M llvm/test/CodeGen/RISCV/rvv/stepvector.ll
    M llvm/test/CodeGen/RISCV/rvv/strided-vpload.ll
    M llvm/test/CodeGen/RISCV/rvv/strided-vpstore.ll
    M llvm/test/CodeGen/RISCV/rvv/umulo-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/urem-seteq-vec.ll
    M llvm/test/CodeGen/RISCV/rvv/vadd-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-deinterleave-fixed.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-deinterleave-load.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-deinterleave.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-extract-last-active.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-interleave-fixed.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-interleave.ll
    M llvm/test/CodeGen/RISCV/rvv/vfma-vp-combine.ll
    M llvm/test/CodeGen/RISCV/rvv/vfma-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfmuladd-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfptrunc-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfsqrt-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vl-opt-instrs.ll
    M llvm/test/CodeGen/RISCV/rvv/vmax-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vmaxu-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vmin-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vminu-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vmseq.ll
    M llvm/test/CodeGen/RISCV/rvv/vmsge.ll
    M llvm/test/CodeGen/RISCV/rvv/vmsgeu.ll
    M llvm/test/CodeGen/RISCV/rvv/vmsgt.ll
    M llvm/test/CodeGen/RISCV/rvv/vmsgtu.ll
    M llvm/test/CodeGen/RISCV/rvv/vmsle.ll
    M llvm/test/CodeGen/RISCV/rvv/vmsleu.ll
    M llvm/test/CodeGen/RISCV/rvv/vmslt.ll
    M llvm/test/CodeGen/RISCV/rvv/vmsltu.ll
    M llvm/test/CodeGen/RISCV/rvv/vmsne.ll
    M llvm/test/CodeGen/RISCV/rvv/vmv.s.x.ll
    M llvm/test/CodeGen/RISCV/rvv/vmv0-elimination.ll
    M llvm/test/CodeGen/RISCV/rvv/vp-combine-store-reverse.ll
    M llvm/test/CodeGen/RISCV/rvv/vp-cttz-elts.ll
    M llvm/test/CodeGen/RISCV/rvv/vp-vector-interleaved-access.ll
    M llvm/test/CodeGen/RISCV/rvv/vpgather-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vpload.ll
    M llvm/test/CodeGen/RISCV/rvv/vpmerge-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vpscatter-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vpstore.ll
    M llvm/test/CodeGen/RISCV/rvv/vreductions-fp-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vrgatherei16-subreg-liveness.ll
    M llvm/test/CodeGen/RISCV/rvv/vscale-vw-web-simplification.ll
    M llvm/test/CodeGen/RISCV/rvv/vselect-fp.ll
    M llvm/test/CodeGen/RISCV/rvv/vselect-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vsetvli-insert-crossbb.ll
    M llvm/test/CodeGen/RISCV/rvv/vsetvli-insert.ll
    M llvm/test/CodeGen/RISCV/rvv/vsetvli-regression.ll
    M llvm/test/CodeGen/RISCV/rvv/vtrunc-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vwadd-mask-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vwadd-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vwsub-mask-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vxrm-insert-out-of-loop.ll
    M llvm/test/CodeGen/RISCV/rvv/vxrm-insert.ll
    M llvm/test/CodeGen/RISCV/rvv/wrong-chain-fixed-load.ll
    M llvm/test/CodeGen/RISCV/scmp.ll
    M llvm/test/CodeGen/RISCV/select-and.ll
    M llvm/test/CodeGen/RISCV/select-bare.ll
    M llvm/test/CodeGen/RISCV/select-cc.ll
    M llvm/test/CodeGen/RISCV/select-constant-xor.ll
    M llvm/test/CodeGen/RISCV/select-optimize-multiple.ll
    M llvm/test/CodeGen/RISCV/select-or.ll
    M llvm/test/CodeGen/RISCV/sextw-removal.ll
    M llvm/test/CodeGen/RISCV/shift-amount-mod.ll
    M llvm/test/CodeGen/RISCV/shifts.ll
    M llvm/test/CodeGen/RISCV/shl-cttz.ll
    M llvm/test/CodeGen/RISCV/split-offsets.ll
    M llvm/test/CodeGen/RISCV/srem-seteq-illegal-types.ll
    M llvm/test/CodeGen/RISCV/srem-vector-lkk.ll
    M llvm/test/CodeGen/RISCV/stack-slot-size.ll
    M llvm/test/CodeGen/RISCV/stack-store-check.ll
    M llvm/test/CodeGen/RISCV/tail-calls.ll
    M llvm/test/CodeGen/RISCV/ucmp.ll
    M llvm/test/CodeGen/RISCV/unaligned-load-store.ll
    M llvm/test/CodeGen/RISCV/urem-seteq-illegal-types.ll
    M llvm/test/CodeGen/RISCV/urem-vector-lkk.ll
    M llvm/test/CodeGen/RISCV/vararg.ll
    M llvm/test/CodeGen/RISCV/wide-scalar-shift-by-byte-multiple-legalization.ll
    M llvm/test/CodeGen/RISCV/wide-scalar-shift-legalization.ll
    M llvm/test/CodeGen/RISCV/xaluo.ll
    M llvm/test/CodeGen/RISCV/xtheadmemidx.ll
    M llvm/test/CodeGen/RISCV/xtheadmempair.ll
    M llvm/test/CodeGen/RISCV/zbb-logic-neg-imm.ll
    M llvm/test/CodeGen/RISCV/zdinx-asm-constraint.ll
    M llvm/test/CodeGen/RISCV/zdinx-boundary-check.ll

  Log Message:
  -----------
  [RISCV] Default to MicroOpBufferSize = 1 for scheduling purposes (#126608)

This change introduces a default schedule model for the RISCV target
which leaves everything unchanged except the MicroOpBufferSize. The
default value of this flag in NoSched is 0. Both configurations
represent in order cores (i.e. no reorder window), the difference
between them comes down to whether heuristics other than latency are
allowed to apply. (Implementation details below)

I left the processor models which explicitly set MicroOpBufferSize=0
unchanged in this patch, but strongly suspect we should change those
too. Honestly, I think the LLVM wide default for this flag should be
changed, but don't have the energy to manage the updates for all
targets.

Implementation wise, the effect of this change is that schedule units
which are ready to run *except that* one of their predecessors may not
have completed yet are added to the Available list, not the Pending one.
The result of this is that it becomes possible to chose to schedule a
node before it's ready cycle if the heuristics prefer. This is
essentially chosing to insert a resource stall instead of e.g.
increasing register pressure.

Note that I was initially concerned there might be a correctness aspect
(as in some kind of exposed pipeline design), but the generic scheduler
doesn't seem to know how to insert noop instructions. Without that, a
program wouldn't be guaranteed to schedule on an exposed pipeline
depending on the program and schedule model in question.

The effect of this is that we sometimes prefer register pressure in
codegen results. This is mostly churn (or small wins) on scalar because
we have many more registers, but is of major importance on vector -
particularly high LMUL - because we effectively have many fewer
registers and the relative cost of spilling is much higher. This is a
significant improvement on high LMUL code quality for default rva23u
configurations - or any non -mcpu vector configuration for that matter.

Fixes #107532



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