Index: llvm/test/CodeGen/AArch64/sve-generate-pseudo.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/AArch64/sve-generate-pseudo.ll
@@ -0,0 +1,15 @@
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve -stop-after=aarch64-isel %s -o - -verify-machineinstrs | FileCheck %s
+
+define <vscale x 16 x i8> @mls_i8(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b, <vscale x 16 x i8> %c) {
+; CHECK: {{.*}} MLS_ZPmZZ_B {{.*}}
+  %1 = mul <vscale x 16 x i8> %a, %b
+  %2 = sub <vscale x 16 x i8> %c, %1
+  ret <vscale x 16 x i8> %2
+}
+
+define <vscale x 16 x i8> @mla_i8(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b, <vscale x 16 x i8> %c) {
+; CHECK: {{.*}} MLA_ZPmZZ_B {{.*}}
+  %1 = mul <vscale x 16 x i8> %a, %b
+  %2 = add <vscale x 16 x i8> %c, %1
+  ret <vscale x 16 x i8> %2
+}
Index: llvm/test/CodeGen/AArch64/sve-int-arith.ll
===================================================================
--- llvm/test/CodeGen/AArch64/sve-int-arith.ll
+++ llvm/test/CodeGen/AArch64/sve-int-arith.ll
@@ -375,6 +375,228 @@
   ret <vscale x 16 x i8> %res
 }
 
+; Test cases below have one of the add/sub operands as constant splat
+
+ define <vscale x 2 x i64> @muladd_i64_positiveAddend(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b)
+; CHECK-LABEL: muladd_i64_positiveAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.d
+; CHECK-NEXT:    mov z2.d, #0xffffffff
+; CHECK-NEXT:    mla z2.d, p0/m, z0.d, z1.d
+; CHECK-NEXT:    mov z0.d, z2.d
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 2 x i64> %a, %b
+  %2 = add <vscale x 2 x i64> %1, shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 4294967295, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+  ret <vscale x 2 x i64> %2
+}
+
+define <vscale x 2 x i64> @muladd_i64_negativeAddend(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b)
+; CHECK-LABEL: muladd_i64_negativeAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.d
+; CHECK-NEXT:    mov z2.d, #0xffffffff00000001
+; CHECK-NEXT:    mla z2.d, p0/m, z0.d, z1.d
+; CHECK-NEXT:    mov z0.d, z2.d
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 2 x i64> %a, %b
+  %2 = add <vscale x 2 x i64> %1, shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 -4294967295, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+  ret <vscale x 2 x i64> %2
+}
+
+
+define <vscale x 4 x i32> @muladd_i32_positiveAddend(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b)
+; CHECK-LABEL: muladd_i32_positiveAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.s
+; CHECK-NEXT:    mov z2.s, #0x10000
+; CHECK-NEXT:    mla z2.s, p0/m, z0.s, z1.s
+; CHECK-NEXT:    mov z0.d, z2.d
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 4 x i32> %a, %b
+  %2 = add <vscale x 4 x i32> %1, shufflevector (<vscale x 4 x i32> insertelement (<vscale x 4 x i32> poison, i32 65536, i32 0), <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer)
+  ret <vscale x 4 x i32> %2
+}
+
+define <vscale x 4 x i32> @muladd_i32_negativeAddend(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b)
+; CHECK-LABEL: muladd_i32_negativeAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.s
+; CHECK-NEXT:    mov z2.s, #0xffff0000
+; CHECK-NEXT:    mla z2.s, p0/m, z0.s, z1.s
+; CHECK-NEXT:    mov z0.d, z2.d
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 4 x i32> %a, %b
+  %2 = add <vscale x 4 x i32> %1, shufflevector (<vscale x 4 x i32> insertelement (<vscale x 4 x i32> poison, i32 -65536, i32 0), <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer)
+  ret <vscale x 4 x i32> %2
+}
+
+define <vscale x 8 x i16> @muladd_i16_positiveAddend(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b)
+; CHECK-LABEL: muladd_i16_positiveAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.h
+; CHECK-NEXT:    mul z0.h, p0/m, z0.h, z1.h
+; CHECK-NEXT:    add z0.h, z0.h, #255 // =0xff
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 8 x i16> %a, %b
+  %2 = add <vscale x 8 x i16> %1, shufflevector (<vscale x 8 x i16> insertelement (<vscale x 8 x i16> poison, i16 255, i16 0), <vscale x 8 x i16> poison, <vscale x 8 x i32> zeroinitializer)
+  ret <vscale x 8 x i16> %2
+}
+
+define <vscale x 8 x i16> @muladd_i16_negativeAddend(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b)
+; CHECK-LABEL: muladd_i16_negativeAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.h
+; CHECK-NEXT:    mov z2.h, #-255 // =0xffffffffffffff01
+; CHECK-NEXT:    mla z2.h, p0/m, z0.h, z1.h
+; CHECK-NEXT:    mov z0.d, z2.d
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 8 x i16> %a, %b
+  %2 = add <vscale x 8 x i16> %1, shufflevector (<vscale x 8 x i16> insertelement (<vscale x 8 x i16> poison, i16 -255, i16 0), <vscale x 8 x i16> poison, <vscale x 8 x i32> zeroinitializer)
+  ret <vscale x 8 x i16> %2
+}
+
+define <vscale x 16 x i8> @muladd_i8_positiveAddend(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b)
+; CHECK-LABEL: muladd_i8_positiveAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.b
+; CHECK-NEXT:    mul z0.b, p0/m, z0.b, z1.b
+; CHECK-NEXT:    add z0.b, z0.b, #15 // =0xf
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 16 x i8> %a, %b
+  %2 = add <vscale x 16 x i8> %1, shufflevector (<vscale x 16 x i8> insertelement (<vscale x 16 x i8> poison, i8 15, i8 0), <vscale x 16 x i8> poison, <vscale x 16 x i32> zeroinitializer)
+  ret <vscale x 16 x i8> %2
+}
+
+define <vscale x 16 x i8> @muladd_i8_negativeAddend(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b)
+; CHECK-LABEL: muladd_i8_negativeAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.b
+; CHECK-NEXT:    mul z0.b, p0/m, z0.b, z1.b
+; CHECK-NEXT:    add z0.b, z0.b, #241 // =0xf1
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 16 x i8> %a, %b
+  %2 = add <vscale x 16 x i8> %1, shufflevector (<vscale x 16 x i8> insertelement (<vscale x 16 x i8> poison, i8 -15, i8 0), <vscale x 16 x i8> poison, <vscale x 16 x i32> zeroinitializer)
+  ret <vscale x 16 x i8> %2
+}
+
+define <vscale x 2 x i64> @mulsub_i64_positiveAddend(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b)
+; CHECK-LABEL: mulsub_i64_positiveAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.d
+; CHECK-NEXT:    mul z0.d, p0/m, z0.d, z1.d
+; CHECK-NEXT:    mov z1.d, #0xffffffff
+; CHECK-NEXT:    sub z0.d, z0.d, z1.d
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 2 x i64> %a, %b
+  %2 = sub <vscale x 2 x i64> %1, shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 4294967295, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+  ret <vscale x 2 x i64> %2
+}
+
+define <vscale x 2 x i64> @mulsub_i64_negativeAddend(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b)
+; CHECK-LABEL: mulsub_i64_negativeAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.d
+; CHECK-NEXT:    mul z0.d, p0/m, z0.d, z1.d
+; CHECK-NEXT:    mov z1.d, #0xffffffff00000001
+; CHECK-NEXT:    sub z0.d, z0.d, z1.d
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 2 x i64> %a, %b
+  %2 = sub <vscale x 2 x i64> %1, shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 -4294967295, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+  ret <vscale x 2 x i64> %2
+}
+
+
+define <vscale x 4 x i32> @mulsub_i32_positiveAddend(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b)
+; CHECK-LABEL: mulsub_i32_positiveAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.s
+; CHECK-NEXT:    mul z0.s, p0/m, z0.s, z1.s
+; CHECK-NEXT:    mov z1.s, #0x10000
+; CHECK-NEXT:    sub z0.s, z0.s, z1.s
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 4 x i32> %a, %b
+  %2 = sub <vscale x 4 x i32> %1, shufflevector (<vscale x 4 x i32> insertelement (<vscale x 4 x i32> poison, i32 65536, i32 0), <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer)
+  ret <vscale x 4 x i32> %2
+}
+
+define <vscale x 4 x i32> @mulsub_i32_negativeAddend(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b)
+; CHECK-LABEL: mulsub_i32_negativeAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.s
+; CHECK-NEXT:    mul z0.s, p0/m, z0.s, z1.s
+; CHECK-NEXT:    mov z1.s, #0xffff0000
+; CHECK-NEXT:    sub z0.s, z0.s, z1.s
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 4 x i32> %a, %b
+  %2 = sub <vscale x 4 x i32> %1, shufflevector (<vscale x 4 x i32> insertelement (<vscale x 4 x i32> poison, i32 -65536, i32 0), <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer)
+  ret <vscale x 4 x i32> %2
+}
+
+define <vscale x 8 x i16> @mulsub_i16_positiveAddend(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b)
+; CHECK-LABEL: mulsub_i16_positiveAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.h
+; CHECK-NEXT:    mul z0.h, p0/m, z0.h, z1.h
+; CHECK-NEXT:    sub z0.h, z0.h, #255 // =0xff
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 8 x i16> %a, %b
+  %2 = sub <vscale x 8 x i16> %1, shufflevector (<vscale x 8 x i16> insertelement (<vscale x 8 x i16> poison, i16 255, i16 0), <vscale x 8 x i16> poison, <vscale x 8 x i32> zeroinitializer)
+  ret <vscale x 8 x i16> %2
+}
+
+define <vscale x 8 x i16> @mulsub_i16_negativeAddend(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b)
+; CHECK-LABEL: mulsub_i16_negativeAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.h
+; CHECK-NEXT:    mul z0.h, p0/m, z0.h, z1.h
+; CHECK-NEXT:    mov z1.h, #-255 // =0xffffffffffffff01
+; CHECK-NEXT:    sub z0.h, z0.h, z1.h
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 8 x i16> %a, %b
+  %2 = sub <vscale x 8 x i16> %1, shufflevector (<vscale x 8 x i16> insertelement (<vscale x 8 x i16> poison, i16 -255, i16 0), <vscale x 8 x i16> poison, <vscale x 8 x i32> zeroinitializer)
+  ret <vscale x 8 x i16> %2
+}
+
+define <vscale x 16 x i8> @mulsub_i8_positiveAddend(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b)
+; CHECK-LABEL: mulsub_i8_positiveAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.b
+; CHECK-NEXT:    mul z0.b, p0/m, z0.b, z1.b
+; CHECK-NEXT:    sub z0.b, z0.b, #15 // =0xf
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 16 x i8> %a, %b
+  %2 = sub <vscale x 16 x i8> %1, shufflevector (<vscale x 16 x i8> insertelement (<vscale x 16 x i8> poison, i8 15, i8 0), <vscale x 16 x i8> poison, <vscale x 16 x i32> zeroinitializer)
+  ret <vscale x 16 x i8> %2
+}
+
+define <vscale x 16 x i8> @mulsub_i8_negativeAddend(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b)
+; CHECK-LABEL: mulsub_i8_negativeAddend:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.b
+; CHECK-NEXT:    mul z0.b, p0/m, z0.b, z1.b
+; CHECK-NEXT:    sub z0.b, z0.b, #241 // =0xf1
+; CHECK-NEXT:    ret
+{
+  %1 = mul <vscale x 16 x i8> %a, %b
+  %2 = sub <vscale x 16 x i8> %1, shufflevector (<vscale x 16 x i8> insertelement (<vscale x 16 x i8> poison, i8 -15, i8 0), <vscale x 16 x i8> poison, <vscale x 16 x i32> zeroinitializer)
+  ret <vscale x 16 x i8> %2
+}
+
 declare <vscale x 16 x i8> @llvm.sadd.sat.nxv16i8(<vscale x 16 x i8>, <vscale x 16 x i8>)
 declare <vscale x 8 x i16> @llvm.sadd.sat.nxv8i16(<vscale x 8 x i16>, <vscale x 8 x i16>)
 declare <vscale x 4 x i32> @llvm.sadd.sat.nxv4i32(<vscale x 4 x i32>, <vscale x 4 x i32>)