Index: clang/include/clang/Basic/BuiltinsPPC.def
===================================================================
--- clang/include/clang/Basic/BuiltinsPPC.def
+++ clang/include/clang/Basic/BuiltinsPPC.def
@@ -305,6 +305,13 @@
 BUILTIN(__builtin_altivec_vextractdm, "UiV2ULLi", "")
 BUILTIN(__builtin_altivec_vextractqm, "UiV1ULLLi", "")
 
+// P10 Vector Expand with Mask built-ins.
+BUILTIN(__builtin_altivec_vexpandbm, "V16UcV16Uc", "")
+BUILTIN(__builtin_altivec_vexpandhm, "V8UsV8Us", "")
+BUILTIN(__builtin_altivec_vexpandwm, "V4UiV4Ui", "")
+BUILTIN(__builtin_altivec_vexpanddm, "V2ULLiV2ULLi", "")
+BUILTIN(__builtin_altivec_vexpandqm, "V1ULLLiV1ULLLi", "")
+
 // P10 Vector Parallel Bits built-ins.
 BUILTIN(__builtin_altivec_vpdepd, "V2ULLiV2ULLiV2ULLi", "")
 BUILTIN(__builtin_altivec_vpextd, "V2ULLiV2ULLiV2ULLi", "")
Index: clang/lib/Headers/altivec.h
===================================================================
--- clang/lib/Headers/altivec.h
+++ clang/lib/Headers/altivec.h
@@ -16791,6 +16791,33 @@
   return __builtin_altivec_vextractqm(__a);
 }
 
+/* vec_expandm */
+
+static __inline__ vector unsigned char __ATTRS_o_ai
+vec_expandm(vector unsigned char __a) {
+  return __builtin_altivec_vexpandbm(__a);
+}
+
+static __inline__ vector unsigned short __ATTRS_o_ai
+vec_expandm(vector unsigned short __a) {
+  return __builtin_altivec_vexpandhm(__a);
+}
+
+static __inline__ vector unsigned int __ATTRS_o_ai
+vec_expandm(vector unsigned int __a) {
+  return __builtin_altivec_vexpandwm(__a);
+}
+
+static __inline__ vector unsigned long long __ATTRS_o_ai
+vec_expandm(vector unsigned long long __a) {
+  return __builtin_altivec_vexpanddm(__a);
+}
+
+static __inline__ vector unsigned __int128 __ATTRS_o_ai
+vec_expandm(vector unsigned __int128 __a) {
+  return __builtin_altivec_vexpandqm(__a);
+}
+
 /* vec_pdep */
 
 static __inline__ vector unsigned long long __ATTRS_o_ai
Index: clang/test/CodeGen/builtins-ppc-p10vector.c
===================================================================
--- clang/test/CodeGen/builtins-ppc-p10vector.c
+++ clang/test/CodeGen/builtins-ppc-p10vector.c
@@ -43,6 +43,36 @@
   return vec_extractm(vui128a);
 }
 
+vector unsigned char test_vexpandm_uc(void) {
+  // CHECK: @llvm.ppc.altivec.vexpandbm(<16 x i8>
+  // CHECK-NEXT: ret <16 x i8>
+  return vec_expandm(vuca);
+}
+
+vector unsigned short test_vexpandm_us(void) {
+  // CHECK: @llvm.ppc.altivec.vexpandhm(<8 x i16>
+  // CHECK-NEXT: ret <8 x i16>
+  return vec_expandm(vusa);
+}
+
+vector unsigned int test_vexpandm_ui(void) {
+  // CHECK: @llvm.ppc.altivec.vexpandwm(<4 x i32>
+  // CHECK-NEXT: ret <4 x i32>
+  return vec_expandm(vuia);
+}
+
+vector unsigned long long test_vexpandm_ull(void) {
+  // CHECK: @llvm.ppc.altivec.vexpanddm(<2 x i64>
+  // CHECK-NEXT: ret <2 x i64>
+  return vec_expandm(vulla);
+}
+
+vector unsigned __int128 test_vexpandm_u128(void) {
+  // CHECK: @llvm.ppc.altivec.vexpandqm(<1 x i128>
+  // CHECK-NEXT: ret <1 x i128>
+  return vec_expandm(vui128a);
+}
+
 vector unsigned long long test_vpdepd(void) {
   // CHECK: @llvm.ppc.altivec.vpdepd(<2 x i64>
   // CHECK-NEXT: ret <2 x i64>
Index: llvm/include/llvm/IR/IntrinsicsPowerPC.td
===================================================================
--- llvm/include/llvm/IR/IntrinsicsPowerPC.td
+++ llvm/include/llvm/IR/IntrinsicsPowerPC.td
@@ -435,6 +435,18 @@
   def int_ppc_altivec_vextractqm : GCCBuiltin<"__builtin_altivec_vextractqm">,
               Intrinsic<[llvm_i32_ty], [llvm_v1i128_ty], [IntrNoMem]>;
 
+  // P10 Vector Expand with Mask
+  def int_ppc_altivec_vexpandbm : GCCBuiltin<"__builtin_altivec_vexpandbm">,
+              Intrinsic<[llvm_v16i8_ty], [llvm_v16i8_ty], [IntrNoMem]>;
+  def int_ppc_altivec_vexpandhm : GCCBuiltin<"__builtin_altivec_vexpandhm">,
+              Intrinsic<[llvm_v8i16_ty], [llvm_v8i16_ty], [IntrNoMem]>;
+  def int_ppc_altivec_vexpandwm : GCCBuiltin<"__builtin_altivec_vexpandwm">,
+              Intrinsic<[llvm_v4i32_ty], [llvm_v4i32_ty], [IntrNoMem]>;
+  def int_ppc_altivec_vexpanddm : GCCBuiltin<"__builtin_altivec_vexpanddm">,
+              Intrinsic<[llvm_v2i64_ty], [llvm_v2i64_ty], [IntrNoMem]>;
+  def int_ppc_altivec_vexpandqm : GCCBuiltin<"__builtin_altivec_vexpandqm">,
+              Intrinsic<[llvm_v1i128_ty], [llvm_v1i128_ty], [IntrNoMem]>;
+
   // P10 Vector Parallel Bits Deposit/Extract Doubleword Builtins.
   def int_ppc_altivec_vpdepd : GCCBuiltin<"__builtin_altivec_vpdepd">,
               Intrinsic<[llvm_v2i64_ty], [llvm_v2i64_ty, llvm_v2i64_ty],
Index: llvm/lib/Target/PowerPC/PPCInstrPrefix.td
===================================================================
--- llvm/lib/Target/PowerPC/PPCInstrPrefix.td
+++ llvm/lib/Target/PowerPC/PPCInstrPrefix.td
@@ -586,6 +586,26 @@
                                       "vextractqm $rD, $vB", IIC_VecGeneral,
                                       [(set i32:$rD,
                                       (int_ppc_altivec_vextractqm v1i128:$vB))]>;
+  def VEXPANDBM : VXForm_RD5_XO5_RS5<1602, 0, (outs vrrc:$vD), (ins vrrc:$vB),
+                                     "vexpandbm $vD, $vB", IIC_VecGeneral,
+                                     [(set v16i8:$vD,
+                                     (int_ppc_altivec_vexpandbm v16i8:$vB))]>;
+  def VEXPANDHM : VXForm_RD5_XO5_RS5<1602, 1, (outs vrrc:$vD), (ins vrrc:$vB),
+                                     "vexpandhm $vD, $vB", IIC_VecGeneral,
+                                     [(set v8i16:$vD,
+                                     (int_ppc_altivec_vexpandhm v8i16:$vB))]>;
+  def VEXPANDWM : VXForm_RD5_XO5_RS5<1602, 2, (outs vrrc:$vD), (ins vrrc:$vB),
+                                     "vexpandwm $vD, $vB", IIC_VecGeneral,
+                                     [(set v4i32:$vD,
+                                     (int_ppc_altivec_vexpandwm v4i32:$vB))]>;
+  def VEXPANDDM : VXForm_RD5_XO5_RS5<1602, 3, (outs vrrc:$vD), (ins vrrc:$vB),
+                                     "vexpanddm $vD, $vB", IIC_VecGeneral,
+                                     [(set v2i64:$vD,
+                                     (int_ppc_altivec_vexpanddm v2i64:$vB))]>;
+  def VEXPANDQM : VXForm_RD5_XO5_RS5<1602, 4, (outs vrrc:$vD), (ins vrrc:$vB),
+                                     "vexpandqm $vD, $vB", IIC_VecGeneral,
+                                     [(set v1i128:$vD,
+                                     (int_ppc_altivec_vexpandqm v1i128:$vB))]>;
    def VPDEPD : VXForm_1<1485, (outs vrrc:$vD), (ins vrrc:$vA, vrrc:$vB),
                          "vpdepd $vD, $vA, $vB", IIC_VecGeneral,
                          [(set v2i64:$vD,
Index: llvm/test/CodeGen/PowerPC/p10-vector-mask-ops.ll
===================================================================
--- llvm/test/CodeGen/PowerPC/p10-vector-mask-ops.ll
+++ llvm/test/CodeGen/PowerPC/p10-vector-mask-ops.ll
@@ -61,3 +61,59 @@
 declare i32 @llvm.ppc.altivec.vextractwm(<4 x i32>)
 declare i32 @llvm.ppc.altivec.vextractdm(<2 x i64>)
 declare i32 @llvm.ppc.altivec.vextractqm(<1 x i128>)
+
+define <16 x i8> @test_vexpandbm(<16 x i8> %a) {
+; CHECK-LABEL: test_vexpandbm:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    vexpandbm v2, v2
+; CHECK-NEXT:    blr
+entry:
+  %exp = tail call <16 x i8> @llvm.ppc.altivec.vexpandbm(<16 x i8> %a)
+  ret <16 x i8> %exp
+}
+
+define <8 x i16> @test_vexpandhm(<8 x i16> %a) {
+; CHECK-LABEL: test_vexpandhm:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    vexpandhm v2, v2
+; CHECK-NEXT:    blr
+entry:
+  %exp = tail call <8 x i16> @llvm.ppc.altivec.vexpandhm(<8 x i16> %a)
+  ret <8 x i16> %exp
+}
+
+define <4 x i32> @test_vexpandwm(<4 x i32> %a) {
+; CHECK-LABEL: test_vexpandwm:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    vexpandwm v2, v2
+; CHECK-NEXT:    blr
+entry:
+  %exp = tail call <4 x i32> @llvm.ppc.altivec.vexpandwm(<4 x i32> %a)
+  ret <4 x i32> %exp
+}
+
+define <2 x i64> @test_vexpanddm(<2 x i64> %a) {
+; CHECK-LABEL: test_vexpanddm:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    vexpanddm v2, v2
+; CHECK-NEXT:    blr
+entry:
+  %exp = tail call <2 x i64> @llvm.ppc.altivec.vexpanddm(<2 x i64> %a)
+  ret <2 x i64> %exp
+}
+
+define <1 x i128> @test_vexpandqm(<1 x i128> %a) {
+; CHECK-LABEL: test_vexpandqm:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    vexpandqm v2, v2
+; CHECK-NEXT:    blr
+entry:
+  %exp = tail call <1 x i128> @llvm.ppc.altivec.vexpandqm(<1 x i128> %a)
+  ret <1 x i128> %exp
+}
+
+declare <16 x i8> @llvm.ppc.altivec.vexpandbm(<16 x i8>)
+declare <8 x i16> @llvm.ppc.altivec.vexpandhm(<8 x i16>)
+declare <4 x i32> @llvm.ppc.altivec.vexpandwm(<4 x i32>)
+declare <2 x i64> @llvm.ppc.altivec.vexpanddm(<2 x i64>)
+declare <1 x i128> @llvm.ppc.altivec.vexpandqm(<1 x i128>)
Index: llvm/test/MC/Disassembler/PowerPC/p10insts.txt
===================================================================
--- llvm/test/MC/Disassembler/PowerPC/p10insts.txt
+++ llvm/test/MC/Disassembler/PowerPC/p10insts.txt
@@ -16,6 +16,21 @@
 # CHECK: vextractqm 1, 2
 0x10 0x2c 0x16 0x42
 
+# CHECK: vexpandbm 1, 2
+0x10 0x20 0x16 0x42
+
+# CHECK: vexpandhm 1, 2
+0x10 0x21 0x16 0x42
+
+# CHECK: vexpandwm 1, 2
+0x10 0x22 0x16 0x42
+
+# CHECK: vexpanddm 1, 2
+0x10 0x23 0x16 0x42
+
+# CHECK: vexpandqm 1, 2
+0x10 0x24 0x16 0x42
+
 # CHECK: vpdepd 1, 2, 0
 0x10 0x22 0x05 0xcd
 
Index: llvm/test/MC/PowerPC/p10.s
===================================================================
--- llvm/test/MC/PowerPC/p10.s
+++ llvm/test/MC/PowerPC/p10.s
@@ -18,6 +18,21 @@
 # CHECK-BE: vextractqm 1, 2                       # encoding: [0x10,0x2c,0x16,0x42]
 # CHECK-LE: vextractqm 1, 2                       # encoding: [0x42,0x16,0x2c,0x10]
             vextractqm 1, 2
+# CHECK-BE: vexpandbm 1, 2                        # encoding: [0x10,0x20,0x16,0x42]
+# CHECK-LE: vexpandbm 1, 2                        # encoding: [0x42,0x16,0x20,0x10]
+            vexpandbm 1, 2
+# CHECK-BE: vexpandhm 1, 2                        # encoding: [0x10,0x21,0x16,0x42]
+# CHECK-LE: vexpandhm 1, 2                        # encoding: [0x42,0x16,0x21,0x10]
+            vexpandhm 1, 2
+# CHECK-BE: vexpandwm 1, 2                        # encoding: [0x10,0x22,0x16,0x42]
+# CHECK-LE: vexpandwm 1, 2                        # encoding: [0x42,0x16,0x22,0x10]
+            vexpandwm 1, 2
+# CHECK-BE: vexpanddm 1, 2                        # encoding: [0x10,0x23,0x16,0x42]
+# CHECK-LE: vexpanddm 1, 2                        # encoding: [0x42,0x16,0x23,0x10]
+            vexpanddm 1, 2
+# CHECK-BE: vexpandqm 1, 2                        # encoding: [0x10,0x24,0x16,0x42]
+# CHECK-LE: vexpandqm 1, 2                        # encoding: [0x42,0x16,0x24,0x10]
+            vexpandqm 1, 2
 # CHECK-BE: vpdepd 1, 2, 0                        # encoding: [0x10,0x22,0x05,0xcd]
 # CHECK-LE: vpdepd 1, 2, 0                        # encoding: [0xcd,0x05,0x22,0x10]
             vpdepd 1, 2, 0