[RISCV] Check for COPY_TO_REGCLASS in usesAllOnesMask (#67037)

Sometimes with mask vectors that have been widened, there is a
CopyToRegClass node in between the VMSET and the CopyToReg.

This is a resurrection of https://reviews.llvm.org/D148524, and is
needed to
remove the mask operand when it's extracted from a subvector as planned
in
#66267 (comment)

Author: lukel97

llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp

@@ -3188,6 +3188,12 @@ static bool usesAllOnesMask(SDValue MaskOp, SDValue GlueOp) {
   // Check the instruction defining V0; it needs to be a VMSET pseudo.
   SDValue MaskSetter = Glued->getOperand(2);
 
+  // Sometimes the VMSET is wrapped in a COPY_TO_REGCLASS, e.g. if the mask came
+  // from an extract_subvector or insert_subvector.
+  if (MaskSetter->isMachineOpcode() &&
+      MaskSetter->getMachineOpcode() == RISCV::COPY_TO_REGCLASS)
+    MaskSetter = MaskSetter->getOperand(0);
+
   const auto IsVMSet = [](unsigned Opc) {
     return Opc == RISCV::PseudoVMSET_M_B1 || Opc == RISCV::PseudoVMSET_M_B16 ||
            Opc == RISCV::PseudoVMSET_M_B2 || Opc == RISCV::PseudoVMSET_M_B32 ||

llvm/test/CodeGen/RISCV/rvv/nearbyint-vp.ll

@@ -555,7 +555,7 @@ define <vscale x 32 x half> @vp_nearbyint_nxv32f16_unmasked(<vscale x 32 x half>
 ; ZVFHMIN-NEXT:    sub sp, sp, a1
 ; ZVFHMIN-NEXT:    .cfi_escape 0x0f, 0x0d, 0x72, 0x00, 0x11, 0x10, 0x22, 0x11, 0x08, 0x92, 0xa2, 0x38, 0x00, 0x1e, 0x22 # sp + 16 + 8 * vlenb
 ; ZVFHMIN-NEXT:    vsetvli a1, zero, e8, m4, ta, ma
-; ZVFHMIN-NEXT:    vmset.m v1
+; ZVFHMIN-NEXT:    vmset.m v16
 ; ZVFHMIN-NEXT:    csrr a2, vlenb
 ; ZVFHMIN-NEXT:    slli a1, a2, 1
 ; ZVFHMIN-NEXT:    sub a3, a0, a1
@@ -564,21 +564,21 @@ define <vscale x 32 x half> @vp_nearbyint_nxv32f16_unmasked(<vscale x 32 x half>
 ; ZVFHMIN-NEXT:    and a3, a4, a3
 ; ZVFHMIN-NEXT:    srli a2, a2, 2
 ; ZVFHMIN-NEXT:    vsetvli a4, zero, e8, mf2, ta, ma
-; ZVFHMIN-NEXT:    vslidedown.vx v17, v1, a2
+; ZVFHMIN-NEXT:    vslidedown.vx v16, v16, a2
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
 ; ZVFHMIN-NEXT:    addi a2, sp, 16
 ; ZVFHMIN-NEXT:    vs8r.v v8, (a2) # Unknown-size Folded Spill
 ; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v12
 ; ZVFHMIN-NEXT:    vsetvli zero, a3, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v17
+; ZVFHMIN-NEXT:    vmv1r.v v0, v16
 ; ZVFHMIN-NEXT:    vfabs.v v8, v24, v0.t
 ; ZVFHMIN-NEXT:    lui a2, 307200
 ; ZVFHMIN-NEXT:    fmv.w.x fa5, a2
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vmflt.vf v17, v8, fa5, v0.t
+; ZVFHMIN-NEXT:    vmflt.vf v16, v8, fa5, v0.t
 ; ZVFHMIN-NEXT:    frflags a2
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v17
+; ZVFHMIN-NEXT:    vmv1r.v v0, v16
 ; ZVFHMIN-NEXT:    vfcvt.x.f.v v8, v24, v0.t
 ; ZVFHMIN-NEXT:    vfcvt.f.x.v v8, v8, v0.t
 ; ZVFHMIN-NEXT:    fsflags a2
@@ -591,23 +591,19 @@ define <vscale x 32 x half> @vp_nearbyint_nxv32f16_unmasked(<vscale x 32 x half>
 ; ZVFHMIN-NEXT:    mv a0, a1
 ; ZVFHMIN-NEXT:  .LBB11_2:
 ; ZVFHMIN-NEXT:    addi a1, sp, 16
-; ZVFHMIN-NEXT:    vl8r.v v16, (a1) # Unknown-size Folded Reload
-; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v16
+; ZVFHMIN-NEXT:    vl8r.v v24, (a1) # Unknown-size Folded Reload
+; ZVFHMIN-NEXT:    vfwcvt.f.f.v v16, v24
 ; ZVFHMIN-NEXT:    vsetvli zero, a0, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v1
-; ZVFHMIN-NEXT:    vfabs.v v16, v24, v0.t
-; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vmflt.vf v1, v16, fa5, v0.t
+; ZVFHMIN-NEXT:    vfabs.v v24, v16
+; ZVFHMIN-NEXT:    vmflt.vf v0, v24, fa5
 ; ZVFHMIN-NEXT:    frflags a0
-; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v1
-; ZVFHMIN-NEXT:    vfcvt.x.f.v v16, v24, v0.t
-; ZVFHMIN-NEXT:    vfcvt.f.x.v v16, v16, v0.t
+; ZVFHMIN-NEXT:    vfcvt.x.f.v v24, v16, v0.t
+; ZVFHMIN-NEXT:    vfcvt.f.x.v v24, v24, v0.t
 ; ZVFHMIN-NEXT:    fsflags a0
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vfsgnj.vv v24, v16, v24, v0.t
+; ZVFHMIN-NEXT:    vfsgnj.vv v16, v24, v16, v0.t
 ; ZVFHMIN-NEXT:    vsetvli a0, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfncvt.f.f.w v8, v24
+; ZVFHMIN-NEXT:    vfncvt.f.f.w v8, v16
 ; ZVFHMIN-NEXT:    csrr a0, vlenb
 ; ZVFHMIN-NEXT:    slli a0, a0, 3
 ; ZVFHMIN-NEXT:    add sp, sp, a0

llvm/test/CodeGen/RISCV/rvv/rint-vp.ll

@@ -517,47 +517,42 @@ define <vscale x 32 x half> @vp_rint_nxv32f16_unmasked(<vscale x 32 x half> %va,
 ; ZVFHMIN-NEXT:    and a3, a4, a3
 ; ZVFHMIN-NEXT:    srli a2, a2, 2
 ; ZVFHMIN-NEXT:    vsetvli a4, zero, e8, mf2, ta, ma
-; ZVFHMIN-NEXT:    vslidedown.vx v17, v16, a2
+; ZVFHMIN-NEXT:    vslidedown.vx v16, v16, a2
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
 ; ZVFHMIN-NEXT:    addi a2, sp, 16
 ; ZVFHMIN-NEXT:    vs8r.v v8, (a2) # Unknown-size Folded Spill
 ; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v12
 ; ZVFHMIN-NEXT:    vsetvli zero, a3, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v17
+; ZVFHMIN-NEXT:    vmv1r.v v0, v16
 ; ZVFHMIN-NEXT:    vfabs.v v8, v24, v0.t
 ; ZVFHMIN-NEXT:    lui a2, 307200
 ; ZVFHMIN-NEXT:    fmv.w.x fa5, a2
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vmflt.vf v17, v8, fa5, v0.t
+; ZVFHMIN-NEXT:    vmflt.vf v16, v8, fa5, v0.t
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v17
+; ZVFHMIN-NEXT:    vmv1r.v v0, v16
 ; ZVFHMIN-NEXT:    vfcvt.x.f.v v8, v24, v0.t
 ; ZVFHMIN-NEXT:    vfcvt.f.x.v v8, v8, v0.t
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
 ; ZVFHMIN-NEXT:    vfsgnj.vv v24, v8, v24, v0.t
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfncvt.f.f.w v20, v24
+; ZVFHMIN-NEXT:    vfncvt.f.f.w v12, v24
 ; ZVFHMIN-NEXT:    bltu a0, a1, .LBB11_2
 ; ZVFHMIN-NEXT:  # %bb.1:
 ; ZVFHMIN-NEXT:    mv a0, a1
 ; ZVFHMIN-NEXT:  .LBB11_2:
 ; ZVFHMIN-NEXT:    addi a1, sp, 16
-; ZVFHMIN-NEXT:    vl8r.v v8, (a1) # Unknown-size Folded Reload
-; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v8
+; ZVFHMIN-NEXT:    vl8r.v v24, (a1) # Unknown-size Folded Reload
+; ZVFHMIN-NEXT:    vfwcvt.f.f.v v16, v24
 ; ZVFHMIN-NEXT:    vsetvli zero, a0, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v16
-; ZVFHMIN-NEXT:    vfabs.v v8, v24, v0.t
-; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vmflt.vf v16, v8, fa5, v0.t
-; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v16
-; ZVFHMIN-NEXT:    vfcvt.x.f.v v8, v24, v0.t
-; ZVFHMIN-NEXT:    vfcvt.f.x.v v8, v8, v0.t
+; ZVFHMIN-NEXT:    vfabs.v v24, v16
+; ZVFHMIN-NEXT:    vmflt.vf v0, v24, fa5
+; ZVFHMIN-NEXT:    vfcvt.x.f.v v24, v16, v0.t
+; ZVFHMIN-NEXT:    vfcvt.f.x.v v24, v24, v0.t
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vfsgnj.vv v24, v8, v24, v0.t
+; ZVFHMIN-NEXT:    vfsgnj.vv v16, v24, v16, v0.t
 ; ZVFHMIN-NEXT:    vsetvli a0, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfncvt.f.f.w v16, v24
-; ZVFHMIN-NEXT:    vmv8r.v v8, v16
+; ZVFHMIN-NEXT:    vfncvt.f.f.w v8, v16
 ; ZVFHMIN-NEXT:    csrr a0, vlenb
 ; ZVFHMIN-NEXT:    slli a0, a0, 3
 ; ZVFHMIN-NEXT:    add sp, sp, a0

llvm/test/CodeGen/RISCV/rvv/round-vp.ll

@@ -565,51 +565,46 @@ define <vscale x 32 x half> @vp_round_nxv32f16_unmasked(<vscale x 32 x half> %va
 ; ZVFHMIN-NEXT:    and a3, a4, a3
 ; ZVFHMIN-NEXT:    srli a2, a2, 2
 ; ZVFHMIN-NEXT:    vsetvli a4, zero, e8, mf2, ta, ma
-; ZVFHMIN-NEXT:    vslidedown.vx v17, v16, a2
+; ZVFHMIN-NEXT:    vslidedown.vx v16, v16, a2
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
 ; ZVFHMIN-NEXT:    addi a2, sp, 16
 ; ZVFHMIN-NEXT:    vs8r.v v8, (a2) # Unknown-size Folded Spill
 ; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v12
 ; ZVFHMIN-NEXT:    vsetvli zero, a3, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v17
+; ZVFHMIN-NEXT:    vmv1r.v v0, v16
 ; ZVFHMIN-NEXT:    vfabs.v v8, v24, v0.t
 ; ZVFHMIN-NEXT:    lui a2, 307200
 ; ZVFHMIN-NEXT:    fmv.w.x fa5, a2
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vmflt.vf v17, v8, fa5, v0.t
+; ZVFHMIN-NEXT:    vmflt.vf v16, v8, fa5, v0.t
 ; ZVFHMIN-NEXT:    fsrmi a2, 4
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v17
+; ZVFHMIN-NEXT:    vmv1r.v v0, v16
 ; ZVFHMIN-NEXT:    vfcvt.x.f.v v8, v24, v0.t
 ; ZVFHMIN-NEXT:    fsrm a2
 ; ZVFHMIN-NEXT:    vfcvt.f.x.v v8, v8, v0.t
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
 ; ZVFHMIN-NEXT:    vfsgnj.vv v24, v8, v24, v0.t
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfncvt.f.f.w v20, v24
+; ZVFHMIN-NEXT:    vfncvt.f.f.w v12, v24
 ; ZVFHMIN-NEXT:    bltu a0, a1, .LBB11_2
 ; ZVFHMIN-NEXT:  # %bb.1:
 ; ZVFHMIN-NEXT:    mv a0, a1
 ; ZVFHMIN-NEXT:  .LBB11_2:
 ; ZVFHMIN-NEXT:    addi a1, sp, 16
-; ZVFHMIN-NEXT:    vl8r.v v8, (a1) # Unknown-size Folded Reload
-; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v8
+; ZVFHMIN-NEXT:    vl8r.v v24, (a1) # Unknown-size Folded Reload
+; ZVFHMIN-NEXT:    vfwcvt.f.f.v v16, v24
 ; ZVFHMIN-NEXT:    vsetvli zero, a0, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v16
-; ZVFHMIN-NEXT:    vfabs.v v8, v24, v0.t
-; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vmflt.vf v16, v8, fa5, v0.t
+; ZVFHMIN-NEXT:    vfabs.v v24, v16
+; ZVFHMIN-NEXT:    vmflt.vf v0, v24, fa5
 ; ZVFHMIN-NEXT:    fsrmi a0, 4
-; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v16
-; ZVFHMIN-NEXT:    vfcvt.x.f.v v8, v24, v0.t
+; ZVFHMIN-NEXT:    vfcvt.x.f.v v24, v16, v0.t
 ; ZVFHMIN-NEXT:    fsrm a0
-; ZVFHMIN-NEXT:    vfcvt.f.x.v v8, v8, v0.t
+; ZVFHMIN-NEXT:    vfcvt.f.x.v v24, v24, v0.t
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vfsgnj.vv v24, v8, v24, v0.t
+; ZVFHMIN-NEXT:    vfsgnj.vv v16, v24, v16, v0.t
 ; ZVFHMIN-NEXT:    vsetvli a0, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfncvt.f.f.w v16, v24
-; ZVFHMIN-NEXT:    vmv8r.v v8, v16
+; ZVFHMIN-NEXT:    vfncvt.f.f.w v8, v16
 ; ZVFHMIN-NEXT:    csrr a0, vlenb
 ; ZVFHMIN-NEXT:    slli a0, a0, 3
 ; ZVFHMIN-NEXT:    add sp, sp, a0

llvm/test/CodeGen/RISCV/rvv/roundeven-vp.ll

@@ -565,51 +565,46 @@ define <vscale x 32 x half> @vp_roundeven_nxv32f16_unmasked(<vscale x 32 x half>
 ; ZVFHMIN-NEXT:    and a3, a4, a3
 ; ZVFHMIN-NEXT:    srli a2, a2, 2
 ; ZVFHMIN-NEXT:    vsetvli a4, zero, e8, mf2, ta, ma
-; ZVFHMIN-NEXT:    vslidedown.vx v17, v16, a2
+; ZVFHMIN-NEXT:    vslidedown.vx v16, v16, a2
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
 ; ZVFHMIN-NEXT:    addi a2, sp, 16
 ; ZVFHMIN-NEXT:    vs8r.v v8, (a2) # Unknown-size Folded Spill
 ; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v12
 ; ZVFHMIN-NEXT:    vsetvli zero, a3, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v17
+; ZVFHMIN-NEXT:    vmv1r.v v0, v16
 ; ZVFHMIN-NEXT:    vfabs.v v8, v24, v0.t
 ; ZVFHMIN-NEXT:    lui a2, 307200
 ; ZVFHMIN-NEXT:    fmv.w.x fa5, a2
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vmflt.vf v17, v8, fa5, v0.t
+; ZVFHMIN-NEXT:    vmflt.vf v16, v8, fa5, v0.t
 ; ZVFHMIN-NEXT:    fsrmi a2, 0
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v17
+; ZVFHMIN-NEXT:    vmv1r.v v0, v16
 ; ZVFHMIN-NEXT:    vfcvt.x.f.v v8, v24, v0.t
 ; ZVFHMIN-NEXT:    fsrm a2
 ; ZVFHMIN-NEXT:    vfcvt.f.x.v v8, v8, v0.t
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
 ; ZVFHMIN-NEXT:    vfsgnj.vv v24, v8, v24, v0.t
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfncvt.f.f.w v20, v24
+; ZVFHMIN-NEXT:    vfncvt.f.f.w v12, v24
 ; ZVFHMIN-NEXT:    bltu a0, a1, .LBB11_2
 ; ZVFHMIN-NEXT:  # %bb.1:
 ; ZVFHMIN-NEXT:    mv a0, a1
 ; ZVFHMIN-NEXT:  .LBB11_2:
 ; ZVFHMIN-NEXT:    addi a1, sp, 16
-; ZVFHMIN-NEXT:    vl8r.v v8, (a1) # Unknown-size Folded Reload
-; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v8
+; ZVFHMIN-NEXT:    vl8r.v v24, (a1) # Unknown-size Folded Reload
+; ZVFHMIN-NEXT:    vfwcvt.f.f.v v16, v24
 ; ZVFHMIN-NEXT:    vsetvli zero, a0, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v16
-; ZVFHMIN-NEXT:    vfabs.v v8, v24, v0.t
-; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vmflt.vf v16, v8, fa5, v0.t
+; ZVFHMIN-NEXT:    vfabs.v v24, v16
+; ZVFHMIN-NEXT:    vmflt.vf v0, v24, fa5
 ; ZVFHMIN-NEXT:    fsrmi a0, 0
-; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v16
-; ZVFHMIN-NEXT:    vfcvt.x.f.v v8, v24, v0.t
+; ZVFHMIN-NEXT:    vfcvt.x.f.v v24, v16, v0.t
 ; ZVFHMIN-NEXT:    fsrm a0
-; ZVFHMIN-NEXT:    vfcvt.f.x.v v8, v8, v0.t
+; ZVFHMIN-NEXT:    vfcvt.f.x.v v24, v24, v0.t
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vfsgnj.vv v24, v8, v24, v0.t
+; ZVFHMIN-NEXT:    vfsgnj.vv v16, v24, v16, v0.t
 ; ZVFHMIN-NEXT:    vsetvli a0, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfncvt.f.f.w v16, v24
-; ZVFHMIN-NEXT:    vmv8r.v v8, v16
+; ZVFHMIN-NEXT:    vfncvt.f.f.w v8, v16
 ; ZVFHMIN-NEXT:    csrr a0, vlenb
 ; ZVFHMIN-NEXT:    slli a0, a0, 3
 ; ZVFHMIN-NEXT:    add sp, sp, a0

llvm/test/CodeGen/RISCV/rvv/roundtozero-vp.ll

@@ -565,51 +565,46 @@ define <vscale x 32 x half> @vp_roundtozero_nxv32f16_unmasked(<vscale x 32 x hal
 ; ZVFHMIN-NEXT:    and a3, a4, a3
 ; ZVFHMIN-NEXT:    srli a2, a2, 2
 ; ZVFHMIN-NEXT:    vsetvli a4, zero, e8, mf2, ta, ma
-; ZVFHMIN-NEXT:    vslidedown.vx v17, v16, a2
+; ZVFHMIN-NEXT:    vslidedown.vx v16, v16, a2
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
 ; ZVFHMIN-NEXT:    addi a2, sp, 16
 ; ZVFHMIN-NEXT:    vs8r.v v8, (a2) # Unknown-size Folded Spill
 ; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v12
 ; ZVFHMIN-NEXT:    vsetvli zero, a3, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v17
+; ZVFHMIN-NEXT:    vmv1r.v v0, v16
 ; ZVFHMIN-NEXT:    vfabs.v v8, v24, v0.t
 ; ZVFHMIN-NEXT:    lui a2, 307200
 ; ZVFHMIN-NEXT:    fmv.w.x fa5, a2
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vmflt.vf v17, v8, fa5, v0.t
+; ZVFHMIN-NEXT:    vmflt.vf v16, v8, fa5, v0.t
 ; ZVFHMIN-NEXT:    fsrmi a2, 1
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v17
+; ZVFHMIN-NEXT:    vmv1r.v v0, v16
 ; ZVFHMIN-NEXT:    vfcvt.x.f.v v8, v24, v0.t
 ; ZVFHMIN-NEXT:    fsrm a2
 ; ZVFHMIN-NEXT:    vfcvt.f.x.v v8, v8, v0.t
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
 ; ZVFHMIN-NEXT:    vfsgnj.vv v24, v8, v24, v0.t
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfncvt.f.f.w v20, v24
+; ZVFHMIN-NEXT:    vfncvt.f.f.w v12, v24
 ; ZVFHMIN-NEXT:    bltu a0, a1, .LBB11_2
 ; ZVFHMIN-NEXT:  # %bb.1:
 ; ZVFHMIN-NEXT:    mv a0, a1
 ; ZVFHMIN-NEXT:  .LBB11_2:
 ; ZVFHMIN-NEXT:    addi a1, sp, 16
-; ZVFHMIN-NEXT:    vl8r.v v8, (a1) # Unknown-size Folded Reload
-; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v8
+; ZVFHMIN-NEXT:    vl8r.v v24, (a1) # Unknown-size Folded Reload
+; ZVFHMIN-NEXT:    vfwcvt.f.f.v v16, v24
 ; ZVFHMIN-NEXT:    vsetvli zero, a0, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v16
-; ZVFHMIN-NEXT:    vfabs.v v8, v24, v0.t
-; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vmflt.vf v16, v8, fa5, v0.t
+; ZVFHMIN-NEXT:    vfabs.v v24, v16
+; ZVFHMIN-NEXT:    vmflt.vf v0, v24, fa5
 ; ZVFHMIN-NEXT:    fsrmi a0, 1
-; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v16
-; ZVFHMIN-NEXT:    vfcvt.x.f.v v8, v24, v0.t
+; ZVFHMIN-NEXT:    vfcvt.x.f.v v24, v16, v0.t
 ; ZVFHMIN-NEXT:    fsrm a0
-; ZVFHMIN-NEXT:    vfcvt.f.x.v v8, v8, v0.t
+; ZVFHMIN-NEXT:    vfcvt.f.x.v v24, v24, v0.t
 ; ZVFHMIN-NEXT:    vsetvli zero, zero, e32, m8, ta, mu
-; ZVFHMIN-NEXT:    vfsgnj.vv v24, v8, v24, v0.t
+; ZVFHMIN-NEXT:    vfsgnj.vv v16, v24, v16, v0.t
 ; ZVFHMIN-NEXT:    vsetvli a0, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfncvt.f.f.w v16, v24
-; ZVFHMIN-NEXT:    vmv8r.v v8, v16
+; ZVFHMIN-NEXT:    vfncvt.f.f.w v8, v16
 ; ZVFHMIN-NEXT:    csrr a0, vlenb
 ; ZVFHMIN-NEXT:    slli a0, a0, 3
 ; ZVFHMIN-NEXT:    add sp, sp, a0

llvm/test/CodeGen/RISCV/rvv/vcopysign-vp.ll

@@ -312,7 +312,7 @@ define <vscale x 32 x half> @vfsgnj_vv_nxv32f16_unmasked(<vscale x 32 x half> %v
 ; ZVFHMIN-NEXT:    sub sp, sp, a1
 ; ZVFHMIN-NEXT:    .cfi_escape 0x0f, 0x0d, 0x72, 0x00, 0x11, 0x10, 0x22, 0x11, 0x08, 0x92, 0xa2, 0x38, 0x00, 0x1e, 0x22 # sp + 16 + 8 * vlenb
 ; ZVFHMIN-NEXT:    vsetvli a1, zero, e8, m4, ta, ma
-; ZVFHMIN-NEXT:    vmset.m v1
+; ZVFHMIN-NEXT:    vmset.m v24
 ; ZVFHMIN-NEXT:    csrr a2, vlenb
 ; ZVFHMIN-NEXT:    slli a1, a2, 1
 ; ZVFHMIN-NEXT:    sub a3, a0, a1
@@ -321,7 +321,7 @@ define <vscale x 32 x half> @vfsgnj_vv_nxv32f16_unmasked(<vscale x 32 x half> %v
 ; ZVFHMIN-NEXT:    and a3, a4, a3
 ; ZVFHMIN-NEXT:    srli a2, a2, 2
 ; ZVFHMIN-NEXT:    vsetvli a4, zero, e8, mf2, ta, ma
-; ZVFHMIN-NEXT:    vslidedown.vx v0, v1, a2
+; ZVFHMIN-NEXT:    vslidedown.vx v0, v24, a2
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
 ; ZVFHMIN-NEXT:    addi a2, sp, 16
 ; ZVFHMIN-NEXT:    vs8r.v v16, (a2) # Unknown-size Folded Spill
@@ -340,8 +340,7 @@ define <vscale x 32 x half> @vfsgnj_vv_nxv32f16_unmasked(<vscale x 32 x half> %v
 ; ZVFHMIN-NEXT:    vfwcvt.f.f.v v16, v24
 ; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v8
 ; ZVFHMIN-NEXT:    vsetvli zero, a0, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v1
-; ZVFHMIN-NEXT:    vfsgnj.vv v16, v24, v16, v0.t
+; ZVFHMIN-NEXT:    vfsgnj.vv v16, v24, v16
 ; ZVFHMIN-NEXT:    vsetvli a0, zero, e16, m4, ta, ma
 ; ZVFHMIN-NEXT:    vfncvt.f.f.w v8, v16
 ; ZVFHMIN-NEXT:    csrr a0, vlenb

llvm/test/CodeGen/RISCV/rvv/vfabs-vp.ll

@@ -291,19 +291,18 @@ define <vscale x 32 x half> @vfabs_vv_nxv32f16_unmasked(<vscale x 32 x half> %va
 ; ZVFHMIN-NEXT:    vsetvli a4, zero, e8, mf2, ta, ma
 ; ZVFHMIN-NEXT:    vslidedown.vx v0, v16, a2
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v12
+; ZVFHMIN-NEXT:    vfwcvt.f.f.v v16, v12
 ; ZVFHMIN-NEXT:    vsetvli zero, a3, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vfabs.v v24, v24, v0.t
+; ZVFHMIN-NEXT:    vfabs.v v16, v16, v0.t
 ; ZVFHMIN-NEXT:    vsetvli a2, zero, e16, m4, ta, ma
-; ZVFHMIN-NEXT:    vfncvt.f.f.w v12, v24
+; ZVFHMIN-NEXT:    vfncvt.f.f.w v12, v16
 ; ZVFHMIN-NEXT:    bltu a0, a1, .LBB11_2
 ; ZVFHMIN-NEXT:  # %bb.1:
 ; ZVFHMIN-NEXT:    mv a0, a1
 ; ZVFHMIN-NEXT:  .LBB11_2:
-; ZVFHMIN-NEXT:    vfwcvt.f.f.v v24, v8
+; ZVFHMIN-NEXT:    vfwcvt.f.f.v v16, v8
 ; ZVFHMIN-NEXT:    vsetvli zero, a0, e32, m8, ta, ma
-; ZVFHMIN-NEXT:    vmv1r.v v0, v16
-; ZVFHMIN-NEXT:    vfabs.v v16, v24, v0.t
+; ZVFHMIN-NEXT:    vfabs.v v16, v16
 ; ZVFHMIN-NEXT:    vsetvli a0, zero, e16, m4, ta, ma
 ; ZVFHMIN-NEXT:    vfncvt.f.f.w v8, v16
 ; ZVFHMIN-NEXT:    ret