Index: llvm/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp
===================================================================
--- llvm/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp
+++ llvm/lib/Target/AArch64/AArch64ExpandPseudoInsts.cpp
@@ -447,15 +447,11 @@
   uint64_t DType = TII->get(Opcode).TSFlags & AArch64::DestructiveInstTypeMask;
   uint64_t FalseLanes = MI.getDesc().TSFlags & AArch64::FalseLanesMask;
   bool FalseZero = FalseLanes == AArch64::FalseLanesZero;
-
   Register DstReg = MI.getOperand(0).getReg();
   bool DstIsDead = MI.getOperand(0).isDead();
-
-  if (DType == AArch64::DestructiveBinary)
-    assert(DstReg != MI.getOperand(3).getReg());
-
   bool UseRev = false;
   unsigned PredIdx, DOPIdx, SrcIdx, Src2Idx;
+
   switch (DType) {
   case AArch64::DestructiveBinaryComm:
   case AArch64::DestructiveBinaryCommWithRev:
@@ -489,7 +485,6 @@
     llvm_unreachable("Unsupported Destructive Operand type");
   }
 
-#ifndef NDEBUG
   // MOVPRFX can only be used if the destination operand
   // is the destructive operand, not as any other operand,
   // so the Destructive Operand must be unique.
@@ -512,7 +507,6 @@
          MI.getOperand(DOPIdx).getReg() != MI.getOperand(Src2Idx).getReg());
     break;
   }
-#endif
 
   // Resolve the reverse opcode
   if (UseRev) {
@@ -527,23 +521,27 @@
 
   // Get the right MOVPRFX
   uint64_t ElementSize = TII->getElementSizeForOpcode(Opcode);
-  unsigned MovPrfx, MovPrfxZero;
+  unsigned MovPrfx, LSLZero, MovPrfxZero;
   switch (ElementSize) {
   case AArch64::ElementSizeNone:
   case AArch64::ElementSizeB:
     MovPrfx = AArch64::MOVPRFX_ZZ;
+    LSLZero = AArch64::LSL_ZPmI_B;
     MovPrfxZero = AArch64::MOVPRFX_ZPzZ_B;
     break;
   case AArch64::ElementSizeH:
     MovPrfx = AArch64::MOVPRFX_ZZ;
+    LSLZero = AArch64::LSL_ZPmI_H;
     MovPrfxZero = AArch64::MOVPRFX_ZPzZ_H;
     break;
   case AArch64::ElementSizeS:
     MovPrfx = AArch64::MOVPRFX_ZZ;
+    LSLZero = AArch64::LSL_ZPmI_S;
     MovPrfxZero = AArch64::MOVPRFX_ZPzZ_S;
     break;
   case AArch64::ElementSizeD:
     MovPrfx = AArch64::MOVPRFX_ZZ;
+    LSLZero = AArch64::LSL_ZPmI_D;
     MovPrfxZero = AArch64::MOVPRFX_ZPzZ_D;
     break;
   default:
@@ -555,9 +553,10 @@
   //
   MachineInstrBuilder PRFX, DOP;
   if (FalseZero) {
-#ifndef NDEBUG
-    assert(DOPRegIsUnique && "The destructive operand should be unique");
-#endif
+    // If we cannot prefix the requested instruction we'll instead emit a
+    // prefixed_zeroing_mov for DestructiveBinary.
+    assert((AArch64::DestructiveBinary == DType || DOPRegIsUnique) &&
+           "The destructive operand should be unique");
     assert(ElementSize != AArch64::ElementSizeNone &&
            "This instruction is unpredicated");
 
@@ -569,10 +568,20 @@
 
     // After the movprfx, the destructive operand is same as Dst
     DOPIdx = 0;
+
+    // Create the additional LSL to zero the lanes when the DstReg is not
+    // unique. Zeros the lanes in z0 that aren't active in p0 with sequence
+    // movprfx z0.b, p0/z, z0.b; lsl z0.b, p0/m, z0.b, #0;
+    if (DType == AArch64::DestructiveBinary &&
+        DstReg == MI.getOperand(SrcIdx).getReg()) {
+      BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(LSLZero))
+          .addReg(DstReg, RegState::Define)
+          .add(MI.getOperand(PredIdx))
+          .addReg(DstReg)
+          .addImm(0);
+    }
   } else if (DstReg != MI.getOperand(DOPIdx).getReg()) {
-#ifndef NDEBUG
     assert(DOPRegIsUnique && "The destructive operand should be unique");
-#endif
     PRFX = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(MovPrfx))
                .addReg(DstReg, RegState::Define)
                .addReg(MI.getOperand(DOPIdx).getReg());
@@ -591,6 +600,7 @@
         .add(MI.getOperand(PredIdx))
         .add(MI.getOperand(SrcIdx));
     break;
+  case AArch64::DestructiveBinary:
   case AArch64::DestructiveBinaryImm:
   case AArch64::DestructiveBinaryComm:
   case AArch64::DestructiveBinaryCommWithRev:
Index: llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
===================================================================
--- llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
+++ llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
@@ -433,7 +433,7 @@
   defm ORR_ZPZZ  : sve_int_bin_pred_zeroing_bhsd<int_aarch64_sve_orr>;
   defm EOR_ZPZZ  : sve_int_bin_pred_zeroing_bhsd<int_aarch64_sve_eor>;
   defm AND_ZPZZ  : sve_int_bin_pred_zeroing_bhsd<int_aarch64_sve_and>;
-  defm BIC_ZPZZ  : sve_int_bin_pred_zeroing_bhsd<null_frag>;
+  defm BIC_ZPZZ  : sve_int_bin_pred_zeroing_bhsd<int_aarch64_sve_bic>;
 } // End HasSVEorSME, UseExperimentalZeroingPseudos
 
 let Predicates = [HasSVEorSME] in {
Index: llvm/test/CodeGen/AArch64/sve-intrinsics-int-arith-merging.ll
===================================================================
--- llvm/test/CodeGen/AArch64/sve-intrinsics-int-arith-merging.ll
+++ llvm/test/CodeGen/AArch64/sve-intrinsics-int-arith-merging.ll
@@ -344,8 +344,7 @@
 define <vscale x 16 x i8> @bic_i8_zero(<vscale x 16 x i1> %pg, <vscale x 16 x i8> %a, <vscale x 16 x i8> %b) {
 ; CHECK-LABEL: bic_i8_zero:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    mov z2.b, #0 // =0x0
-; CHECK-NEXT:    sel z0.b, p0, z0.b, z2.b
+; CHECK-NEXT:    movprfx z0.b, p0/z, z0.b
 ; CHECK-NEXT:    bic z0.b, p0/m, z0.b, z1.b
 ; CHECK-NEXT:    ret
   %a_z = select <vscale x 16 x i1> %pg, <vscale x 16 x i8> %a, <vscale x 16 x i8> zeroinitializer
@@ -358,8 +357,7 @@
 define <vscale x 8 x i16> @bic_i16_zero(<vscale x 8 x i1> %pg, <vscale x 8 x i16> %a, <vscale x 8 x i16> %b) {
 ; CHECK-LABEL: bic_i16_zero:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    mov z2.h, #0 // =0x0
-; CHECK-NEXT:    sel z0.h, p0, z0.h, z2.h
+; CHECK-NEXT:    movprfx z0.h, p0/z, z0.h
 ; CHECK-NEXT:    bic z0.h, p0/m, z0.h, z1.h
 ; CHECK-NEXT:    ret
   %a_z = select <vscale x 8 x i1> %pg, <vscale x 8 x i16> %a, <vscale x 8 x i16> zeroinitializer
@@ -372,8 +370,7 @@
 define <vscale x 4 x i32> @bic_i32_zero(<vscale x 4 x i1> %pg, <vscale x 4 x i32> %a, <vscale x 4 x i32> %b) {
 ; CHECK-LABEL: bic_i32_zero:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    mov z2.s, #0 // =0x0
-; CHECK-NEXT:    sel z0.s, p0, z0.s, z2.s
+; CHECK-NEXT:    movprfx z0.s, p0/z, z0.s
 ; CHECK-NEXT:    bic z0.s, p0/m, z0.s, z1.s
 ; CHECK-NEXT:    ret
   %a_z = select <vscale x 4 x i1> %pg, <vscale x 4 x i32> %a, <vscale x 4 x i32> zeroinitializer
@@ -386,8 +383,7 @@
 define <vscale x 2 x i64> @bic_i64_zero(<vscale x 2 x i1> %pg, <vscale x 2 x i64> %a, <vscale x 2 x i64> %b) {
 ; CHECK-LABEL: bic_i64_zero:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    mov z2.d, #0 // =0x0
-; CHECK-NEXT:    sel z0.d, p0, z0.d, z2.d
+; CHECK-NEXT:    movprfx z0.d, p0/z, z0.d
 ; CHECK-NEXT:    bic z0.d, p0/m, z0.d, z1.d
 ; CHECK-NEXT:    ret
   %a_z = select <vscale x 2 x i1> %pg, <vscale x 2 x i64> %a, <vscale x 2 x i64> zeroinitializer
@@ -397,6 +393,39 @@
   ret <vscale x 2 x i64> %out
 }
 
+; BIC (i.e. A & ~A) is illegal operation with movprfx, so the codegen depend on IR before expand-pseudo
+define <vscale x 2 x i64> @bic_i64_zero_no_unique_reg(<vscale x 2 x i1> %pg, <vscale x 2 x i64> %a) {
+; CHECK-LABEL: bic_i64_zero_no_unique_reg:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    mov z1.d, #0 // =0x0
+; CHECK-NEXT:    mov z1.d, p0/m, z0.d
+; CHECK-NEXT:    movprfx z0.d, p0/z, z0.d
+; CHECK-NEXT:    bic z0.d, p0/m, z0.d, z1.d
+; CHECK-NEXT:    ret
+  %a_z = select <vscale x 2 x i1> %pg, <vscale x 2 x i64> %a, <vscale x 2 x i64> zeroinitializer
+  %out = call <vscale x 2 x i64> @llvm.aarch64.sve.bic.nxv2i64(<vscale x 2 x i1> %pg,
+                                                               <vscale x 2 x i64> %a_z,
+                                                               <vscale x 2 x i64> %a_z)
+  ret <vscale x 2 x i64> %out
+}
+
+; BIC (i.e. A & ~B) is not a commutative operation, so disable it when the
+; destination operand is not the destructive operand
+define <vscale x 2 x i64> @bic_i64_zero_no_comm(<vscale x 2 x i1> %pg, <vscale x 2 x i64> %a, <vscale x 2 x i64> %b) {
+; CHECK-LABEL: bic_i64_zero_no_comm:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    mov z2.d, #0 // =0x0
+; CHECK-NEXT:    sel z0.d, p0, z0.d, z2.d
+; CHECK-NEXT:    bic z1.d, p0/m, z1.d, z0.d
+; CHECK-NEXT:    mov z0.d, z1.d
+; CHECK-NEXT:    ret
+  %a_z = select <vscale x 2 x i1> %pg, <vscale x 2 x i64> %a, <vscale x 2 x i64> zeroinitializer
+  %out = call <vscale x 2 x i64> @llvm.aarch64.sve.bic.nxv2i64(<vscale x 2 x i1> %pg,
+                                                               <vscale x 2 x i64> %b,
+                                                               <vscale x 2 x i64> %a_z)
+  ret <vscale x 2 x i64> %out
+}
+
 declare <vscale x 16 x i8> @llvm.aarch64.sve.add.nxv16i8(<vscale x 16 x i1>, <vscale x 16 x i8>, <vscale x 16 x i8>)
 declare <vscale x 8 x i16> @llvm.aarch64.sve.add.nxv8i16(<vscale x 8 x i1>, <vscale x 8 x i16>, <vscale x 8 x i16>)
 declare <vscale x 4 x i32> @llvm.aarch64.sve.add.nxv4i32(<vscale x 4 x i1>, <vscale x 4 x i32>, <vscale x 4 x i32>)
Index: llvm/test/CodeGen/AArch64/sve-intrinsics-int-arith-merging.mir
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/AArch64/sve-intrinsics-int-arith-merging.mir
@@ -0,0 +1,39 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple=aarch64 -mattr=+sve -mattr=+use-experimental-zeroing-pseudos -run-pass=aarch64-expand-pseudo %s -o - | FileCheck %s
+
+# Should create an additional LSL to zero the lanes as the DstReg is not unique
+
+--- |
+  define <vscale x 8 x i16> @bic_i16_zero(<vscale x 8 x i1> %pg, <vscale x 8 x i16> %a){
+    %a_z = select <vscale x 8 x i1> %pg, <vscale x 8 x i16> %a, <vscale x 8 x i16> zeroinitializer
+    %out = call <vscale x 8 x i16> @llvm.aarch64.sve.bic.nxv8i16(<vscale x 8 x i1> %pg, <vscale x 8 x i16> %a_z, <vscale x 8 x i16> %a_z)
+    ret <vscale x 8 x i16> %out
+  }
+
+  declare <vscale x 8 x i16> @llvm.aarch64.sve.bic.nxv8i16(<vscale x 8 x i1>, <vscale x 8 x i16>, <vscale x 8 x i16>)
+...
+---
+name:            bic_i16_zero
+alignment:       4
+tracksRegLiveness: true
+tracksDebugUserValues: true
+registers:       []
+liveins:
+  - { reg: '$p0', virtual-reg: '' }
+  - { reg: '$z0', virtual-reg: '' }
+body:             |
+  bb.0 (%ir-block.0):
+    liveins: $p0, $z0
+
+    ; CHECK-LABEL: name: bic_i16_zero
+    ; CHECK: liveins: $p0, $z0
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: BUNDLE implicit-def $z0, implicit-def $q0, implicit-def $d0, implicit-def $s0, implicit-def $h0, implicit-def $b0, implicit-def $z0_hi, implicit killed $p0, implicit $z0 {
+    ; CHECK-NEXT:   $z0 = MOVPRFX_ZPzZ_H $p0, $z0
+    ; CHECK-NEXT:   $z0 = LSL_ZPmI_H killed renamable $p0, internal $z0, 0
+    ; CHECK-NEXT:   $z0 = BIC_ZPmZ_H killed renamable $p0, internal killed $z0, internal killed renamable $z0
+    ; CHECK-NEXT: }
+    ; CHECK-NEXT: RET undef $lr, implicit $z0
+    renamable $z0 = BIC_ZPZZ_ZERO_H killed renamable $p0, killed renamable $z0, killed renamable $z0
+    RET_ReallyLR implicit $z0
+...