Index: lib/Target/AMDGPU/AMDGPUInstructionSelector.h
===================================================================
--- lib/Target/AMDGPU/AMDGPUInstructionSelector.h
+++ lib/Target/AMDGPU/AMDGPUInstructionSelector.h
@@ -75,6 +75,7 @@
   bool selectG_CONSTANT(MachineInstr &I) const;
   bool selectG_ADD(MachineInstr &I) const;
   bool selectG_EXTRACT(MachineInstr &I) const;
+  bool selectG_MERGE_VALUES(MachineInstr &I) const;
   bool selectG_GEP(MachineInstr &I) const;
   bool selectG_IMPLICIT_DEF(MachineInstr &I) const;
   bool selectG_INSERT(MachineInstr &I) const;
Index: lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
+++ lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
@@ -325,6 +325,44 @@
   return true;
 }
 
+bool AMDGPUInstructionSelector::selectG_MERGE_VALUES(MachineInstr &MI) const {
+  MachineBasicBlock *BB = MI.getParent();
+  MachineFunction *MF = BB->getParent();
+  MachineRegisterInfo &MRI = MF->getRegInfo();
+  Register DstReg = MI.getOperand(0).getReg();
+  LLT DstTy = MRI.getType(DstReg);
+  LLT SrcTy = MRI.getType(MI.getOperand(1).getReg());
+
+  const unsigned SrcSize = SrcTy.getSizeInBits();
+  const DebugLoc &DL = MI.getDebugLoc();
+  const RegisterBank *DstBank = RBI.getRegBank(DstReg, MRI, TRI);
+  const unsigned DstSize = DstTy.getSizeInBits();
+  const TargetRegisterClass *DstRC =
+    TRI.getRegClassForSizeOnBank(DstSize, *DstBank, MRI);
+  if (!DstRC)
+    return false;
+
+  ArrayRef<int16_t> SubRegs = TRI.getRegSplitParts(DstRC, SrcSize / 8);
+  MachineInstrBuilder MIB =
+    BuildMI(*BB, &MI, DL, TII.get(TargetOpcode::REG_SEQUENCE), DstReg);
+  for (int I = 0, E = MI.getNumOperands() - 1; I != E; ++I) {
+    MachineOperand &Src = MI.getOperand(I + 1);
+    MIB.addReg(Src.getReg(), getUndefRegState(Src.isUndef()));
+    MIB.addImm(SubRegs[I]);
+
+    const TargetRegisterClass *SrcRC
+      = TRI.getConstrainedRegClassForOperand(Src, MRI);
+    if (SrcRC && !RBI.constrainGenericRegister(Src.getReg(), *SrcRC, MRI))
+      return false;
+  }
+
+  if (!RBI.constrainGenericRegister(DstReg, *DstRC, MRI))
+    return false;
+
+  MI.eraseFromParent();
+  return true;
+}
+
 bool AMDGPUInstructionSelector::selectG_GEP(MachineInstr &I) const {
   return selectG_ADD(I);
 }
@@ -1144,6 +1182,9 @@
     return selectG_CONSTANT(I);
   case TargetOpcode::G_EXTRACT:
     return selectG_EXTRACT(I);
+  case TargetOpcode::G_MERGE_VALUES:
+  case TargetOpcode::G_CONCAT_VECTORS:
+    return selectG_MERGE_VALUES(I);
   case TargetOpcode::G_GEP:
     return selectG_GEP(I);
   case TargetOpcode::G_IMPLICIT_DEF:
Index: lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
+++ lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
@@ -641,7 +641,7 @@
                Query.Types[0].getScalarSizeInBits() == 64;
       });
 
-  // TODO: Support any combination of v2s32
+  // TODO: Support any combination of s16, s32, s64, pointer vectors.
   getActionDefinitionsBuilder(G_CONCAT_VECTORS)
     .legalFor({{V4S32, V2S32},
                {V8S32, V2S32},
@@ -651,7 +651,9 @@
                {V8S16, V2S16},
                {V8S16, V4S16},
                {LLT::vector(4, LocalPtr), LLT::vector(2, LocalPtr)},
-               {LLT::vector(4, PrivatePtr), LLT::vector(2, PrivatePtr)}});
+               {LLT::vector(4, PrivatePtr), LLT::vector(2, PrivatePtr)}})
+    // FIXME: Should restrict maximum size, but there seems to be a missing predicate.
+    .legalIf(typeInSet(1, {V2S32, V4S32, V8S32,V2S16, V4S16, V8S16, LLT::vector(16, 16), V2S64}));
 
   // Merge/Unmerge
   for (unsigned Op : {G_MERGE_VALUES, G_UNMERGE_VALUES}) {
Index: lib/Target/AMDGPU/SIRegisterInfo.cpp
===================================================================
--- lib/Target/AMDGPU/SIRegisterInfo.cpp
+++ lib/Target/AMDGPU/SIRegisterInfo.cpp
@@ -1573,27 +1573,43 @@
     }
   }
 
-  assert(EltSize == 16 && "unhandled register spill split size");
+  if (EltSize == 16) {
+    static const int16_t Sub0_15_128[] = {
+      AMDGPU::sub0_sub1_sub2_sub3,
+      AMDGPU::sub4_sub5_sub6_sub7,
+      AMDGPU::sub8_sub9_sub10_sub11,
+      AMDGPU::sub12_sub13_sub14_sub15
+    };
 
-  static const int16_t Sub0_15_128[] = {
-    AMDGPU::sub0_sub1_sub2_sub3,
-    AMDGPU::sub4_sub5_sub6_sub7,
-    AMDGPU::sub8_sub9_sub10_sub11,
-    AMDGPU::sub12_sub13_sub14_sub15
-  };
+    static const int16_t Sub0_7_128[] = {
+      AMDGPU::sub0_sub1_sub2_sub3,
+      AMDGPU::sub4_sub5_sub6_sub7
+    };
+
+    switch (AMDGPU::getRegBitWidth(*RC->MC)) {
+    case 128:
+      return {};
+    case 256:
+      return makeArrayRef(Sub0_7_128);
+    case 512:
+      return makeArrayRef(Sub0_15_128);
+    default:
+      llvm_unreachable("unhandled register size");
+    }
+  }
+
+  assert(EltSize == 32 && "unhandled elt size");
 
-  static const int16_t Sub0_7_128[] = {
-    AMDGPU::sub0_sub1_sub2_sub3,
-    AMDGPU::sub4_sub5_sub6_sub7
+  static const int16_t Sub0_15_256[] = {
+    AMDGPU::sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7,
+    AMDGPU::sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15
   };
 
   switch (AMDGPU::getRegBitWidth(*RC->MC)) {
-  case 128:
-    return {};
   case 256:
-    return makeArrayRef(Sub0_7_128);
+    return {};
   case 512:
-    return makeArrayRef(Sub0_15_128);
+    return makeArrayRef(Sub0_15_256);
   default:
     llvm_unreachable("unhandled register size");
   }
@@ -1727,8 +1743,7 @@
     if (Size < 32)
       return RB.getID() == AMDGPU::VGPRRegBankID ? &AMDGPU::VGPR_32RegClass :
                                                    &AMDGPU::SReg_32_XM0RegClass;
-    assert(Size < 512 && "unimplemented");
-    return getRegClassForSizeOnBank(PowerOf2Ceil(Size), RB, MRI);
+    return nullptr;
   }
 }
 
Index: test/CodeGen/AMDGPU/GlobalISel/inst-select-concat-vectors.mir
===================================================================
--- /dev/null
+++ test/CodeGen/AMDGPU/GlobalISel/inst-select-concat-vectors.mir
@@ -0,0 +1,738 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=instruction-select -global-isel-abort=2 -pass-remarks-missed='gisel*'  -o - %s 2> %t | FileCheck -check-prefix=GCN  %s
+# RUN: FileCheck -check-prefix=ERR %s < %t
+
+# ERR-NOT: remark:
+# ERR: remark: <unknown>:0:0: cannot select: %3:sgpr(<12 x s16>) = G_CONCAT_VECTORS %0:sgpr(<4 x s16>), %1:sgpr(<4 x s16>), %2:sgpr(<4 x s16>) (in function: test_concat_vectors_s_v12s16_s_v4s16_s_v4s16_s_v4s16)
+# ERR-NEXT: remark: <unknown>:0:0: cannot select: %3:vgpr(<12 x s16>) = G_CONCAT_VECTORS %0:vgpr(<4 x s16>), %1:vgpr(<4 x s16>), %2:vgpr(<4 x s16>) (in function: test_concat_vectors_v_v12s16_v_v4s16_v_v4s16_v_v4s16)
+# ERR-NEXT: remark: <unknown>:0:0: instruction is not legal: %2:sgpr(<6 x s64>) = G_CONCAT_VECTORS %0:sgpr(<3 x s64>), %1:sgpr(<3 x s64>) (in function: test_concat_vectors_s_v6s64_s_v3s64_s_v3s64)
+# ERR-NEXT: remark: <unknown>:0:0: instruction is not legal: %2:sgpr(<8 x s64>) = G_CONCAT_VECTORS %0:sgpr(<4 x s64>), %1:sgpr(<4 x s64>) (in function: test_concat_vectors_s_v8s64_s_v4s64_s_v4s64)
+# ERR-NEXT: remark: <unknown>:0:0: instruction is not legal: %2:sgpr(<4 x p1>) = G_CONCAT_VECTORS %0:sgpr(<2 x p1>), %1:sgpr(<2 x p1>) (in function: test_concat_vectors_s_v4p1_s_v2p1_s_v2p1)
+# ERR-NEXT: remark: <unknown>:0:0: instruction is not legal: %4:sgpr(<8 x p3>) = G_CONCAT_VECTORS %0:sgpr(<2 x p3>), %1:sgpr(<2 x p3>), %2:sgpr(<2 x p3>), %3:sgpr(<2 x p3>) (in function: test_concat_vectors_s_v8p3_s_v2p3_s_v2p3_v2p3_s_v2p3)
+# ERR-NOT: remark:
+
+---
+name: test_concat_vectors_v_v4s16_v_v2s16_v_v2s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; GCN-LABEL: name: test_concat_vectors_v_v4s16_v_v2s16_v_v2s16
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
+    ; GCN: $vgpr0_vgpr1 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(<2 x s16>) = COPY $vgpr0
+    %1:vgpr(<2 x s16>) = COPY $vgpr1
+    %2:vgpr(<4 x s16>) = G_CONCAT_VECTORS %0, %1
+    $vgpr0_vgpr1 = COPY %2
+...
+
+---
+name: test_concat_vectors_v_v4s16_s_v2s16_v_v2s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $vgpr0
+
+    ; GCN-LABEL: name: test_concat_vectors_v_v4s16_s_v2s16_v_v2s16
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
+    ; GCN: $vgpr0_vgpr1 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<2 x s16>) = COPY $sgpr0
+    %1:vgpr(<2 x s16>) = COPY $vgpr1
+    %2:vgpr(<4 x s16>) = G_CONCAT_VECTORS %0, %1
+    $vgpr0_vgpr1 = COPY %2
+...
+
+---
+name: test_concat_vectors_v_v4s16_v_v2s16_s_v2s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $vgpr0
+
+    ; GCN-LABEL: name: test_concat_vectors_v_v4s16_v_v2s16_s_v2s16
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
+    ; GCN: $vgpr0_vgpr1 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(<2 x s16>) = COPY $vgpr0
+    %1:sgpr(<2 x s16>) = COPY $sgpr0
+    %2:vgpr(<4 x s16>) = G_CONCAT_VECTORS %0, %1
+    $vgpr0_vgpr1 = COPY %2
+...
+
+---
+name: test_concat_vectors_s_v4s16_s_v2s16_s_v2s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $sgpr1
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v4s16_s_v2s16_s_v2s16
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr1
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_64_xexec = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
+    ; GCN: $sgpr0_sgpr1 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<2 x s16>) = COPY $sgpr0
+    %1:sgpr(<2 x s16>) = COPY $sgpr1
+    %2:sgpr(<4 x s16>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1 = COPY %2
+...
+
+---
+name: test_concat_vectors_s_s96_s_v2s16_s_v2s16_s_v2s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $sgpr1, $sgpr2
+
+    ; GCN-LABEL: name: test_concat_vectors_s_s96_s_v2s16_s_v2s16_s_v2s16
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr2
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_96 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2
+    ; GCN: $sgpr0_sgpr1_sgpr2 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<2 x s16>) = COPY $sgpr0
+    %1:sgpr(<2 x s16>) = COPY $sgpr1
+    %2:sgpr(<2 x s16>) = COPY $sgpr2
+    %3:sgpr(<6 x s16>) = G_CONCAT_VECTORS %0, %1, %2
+    $sgpr0_sgpr1_sgpr2 = COPY %3
+...
+
+---
+name: test_concat_vectors_v_s96_v_v2s16_v_v2s16_v_v2s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2
+
+    ; GCN-LABEL: name: test_concat_vectors_v_s96_v_v2s16_v_v2s16_v_v2s16
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_96 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2
+    ; GCN: $vgpr0_vgpr1_vgpr2 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(<2 x s16>) = COPY $vgpr0
+    %1:vgpr(<2 x s16>) = COPY $vgpr1
+    %2:vgpr(<2 x s16>) = COPY $vgpr2
+    %3:vgpr(<6 x s16>) = G_CONCAT_VECTORS %0, %1, %2
+    $vgpr0_vgpr1_vgpr2 = COPY %3
+...
+
+---
+name: test_concat_vectors_s_v8s16_s_v2s16_s_v2s16_s_v2s16_s_v2s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $sgpr1, $sgpr2, $sgpr3
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v8s16_s_v2s16_s_v2s16_s_v2s16_s_v2s16
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr2
+    ; GCN: [[COPY3:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2, [[COPY3]], %subreg.sub3
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<2 x s16>) = COPY $sgpr0
+    %1:sgpr(<2 x s16>) = COPY $sgpr1
+    %2:sgpr(<2 x s16>) = COPY $sgpr2
+    %3:sgpr(<2 x s16>) = COPY $sgpr3
+    %4:sgpr(<8 x s16>) = G_CONCAT_VECTORS %0, %1, %2, %3
+    $sgpr0_sgpr1_sgpr2_sgpr3 = COPY %4
+...
+
+---
+name: test_concat_vectors_v_v8s16_v_v2s16_v_v2s16_v_v2s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3
+
+    ; GCN-LABEL: name: test_concat_vectors_v_v8s16_v_v2s16_v_v2s16_v_v2s16
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GCN: [[COPY3:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2, [[COPY3]], %subreg.sub3
+    ; GCN: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(<2 x s16>) = COPY $vgpr0
+    %1:vgpr(<2 x s16>) = COPY $vgpr1
+    %2:vgpr(<2 x s16>) = COPY $vgpr2
+    %3:vgpr(<2 x s16>) = COPY $vgpr3
+    %4:vgpr(<8 x s16>) = G_CONCAT_VECTORS %0, %1, %2, %3
+    $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %4
+...
+
+---
+name: test_concat_vectors_s_v8s16_s_v4s16_s_v4s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v8s16_s_v4s16_s_v4s16
+    ; GCN: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY $sgpr2_sgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<4 x s16>) = COPY $sgpr0_sgpr1
+    %1:sgpr(<4 x s16>) = COPY $sgpr2_sgpr3
+    %2:sgpr(<8 x s16>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3 = COPY %2
+...
+
+---
+name: test_concat_vectors_v_v8s16_v_v4s16_v_v4s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
+
+    ; GCN-LABEL: name: test_concat_vectors_v_v8s16_v_v4s16_v_v4s16
+    ; GCN: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3
+    ; GCN: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(<4 x s16>) = COPY $vgpr0_vgpr1
+    %1:vgpr(<4 x s16>) = COPY $vgpr2_vgpr3
+    %2:vgpr(<8 x s16>) = G_CONCAT_VECTORS %0, %1
+    $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %2
+...
+
+---
+name: test_concat_vectors_s_s160_s_v2s16_s_v2s16_s_v2s16_s_v2s16_s_v2s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $sgpr1, $sgpr2, $sgpr3, $sgpr4
+
+    ; GCN-LABEL: name: test_concat_vectors_s_s160_s_v2s16_s_v2s16_s_v2s16_s_v2s16_s_v2s16
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr2
+    ; GCN: [[COPY3:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr3
+    ; GCN: [[COPY4:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr4
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_160 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2, [[COPY3]], %subreg.sub3, [[COPY4]], %subreg.sub4
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<2 x s16>) = COPY $sgpr0
+    %1:sgpr(<2 x s16>) = COPY $sgpr1
+    %2:sgpr(<2 x s16>) = COPY $sgpr2
+    %3:sgpr(<2 x s16>) = COPY $sgpr3
+    %4:sgpr(<2 x s16>) = COPY $sgpr4
+    %5:sgpr(<10 x s16>) = G_CONCAT_VECTORS %0, %1, %2, %3, %4
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4 = COPY %5
+...
+
+---
+name: test_concat_vectors_v_s160_v_v2s16_v_v2s16_v_v2s16_v_v2s16_v_v2s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3, $vgpr4
+
+    ; GCN-LABEL: name: test_concat_vectors_v_s160_v_v2s16_v_v2s16_v_v2s16_v_v2s16_v_v2s16
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GCN: [[COPY3:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GCN: [[COPY4:%[0-9]+]]:vgpr_32 = COPY $vgpr4
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_160 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2, [[COPY3]], %subreg.sub3, [[COPY4]], %subreg.sub4
+    ; GCN: $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(<2 x s16>) = COPY $vgpr0
+    %1:vgpr(<2 x s16>) = COPY $vgpr1
+    %2:vgpr(<2 x s16>) = COPY $vgpr2
+    %3:vgpr(<2 x s16>) = COPY $vgpr3
+    %4:vgpr(<2 x s16>) = COPY $vgpr4
+    %5:vgpr(<10 x s16>) = G_CONCAT_VECTORS %0, %1, %2, %3, %4
+    $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4 = COPY %5
+...
+
+---
+name: test_concat_vectors_s_v12s16_s_v4s16_s_v4s16_s_v4s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v12s16_s_v4s16_s_v4s16_s_v4s16
+    ; GCN: [[COPY:%[0-9]+]]:sgpr(<4 x s16>) = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sgpr(<4 x s16>) = COPY $sgpr2_sgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:sgpr(<4 x s16>) = COPY $sgpr4_sgpr5
+    ; GCN: [[CONCAT_VECTORS:%[0-9]+]]:sgpr(<12 x s16>) = G_CONCAT_VECTORS [[COPY]](<4 x s16>), [[COPY1]](<4 x s16>), [[COPY2]](<4 x s16>)
+    ; GCN: S_ENDPGM 0, implicit [[CONCAT_VECTORS]](<12 x s16>)
+    %0:sgpr(<4 x s16>) = COPY $sgpr0_sgpr1
+    %1:sgpr(<4 x s16>) = COPY $sgpr2_sgpr3
+    %2:sgpr(<4 x s16>) = COPY $sgpr4_sgpr5
+    %3:sgpr(<12 x s16>) = G_CONCAT_VECTORS %0, %1, %2
+    S_ENDPGM 0, implicit %3
+...
+
+---
+name: test_concat_vectors_v_v12s16_v_v4s16_v_v4s16_v_v4s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+
+    ; GCN-LABEL: name: test_concat_vectors_v_v12s16_v_v4s16_v_v4s16_v_v4s16
+    ; GCN: [[COPY:%[0-9]+]]:vgpr(<4 x s16>) = COPY $vgpr0_vgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr(<4 x s16>) = COPY $vgpr2_vgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:vgpr(<4 x s16>) = COPY $vgpr4_vgpr5
+    ; GCN: [[CONCAT_VECTORS:%[0-9]+]]:vgpr(<12 x s16>) = G_CONCAT_VECTORS [[COPY]](<4 x s16>), [[COPY1]](<4 x s16>), [[COPY2]](<4 x s16>)
+    ; GCN: S_ENDPGM 0, implicit [[CONCAT_VECTORS]](<12 x s16>)
+    %0:vgpr(<4 x s16>) = COPY $vgpr0_vgpr1
+    %1:vgpr(<4 x s16>) = COPY $vgpr2_vgpr3
+    %2:vgpr(<4 x s16>) = COPY $vgpr4_vgpr5
+    %3:vgpr(<12 x s16>) = G_CONCAT_VECTORS %0, %1, %2
+    S_ENDPGM 0, implicit %3
+...
+
+---
+name: test_concat_vectors_s_v16s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5, $sgpr6_sgpr7
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v16s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16
+    ; GCN: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY $sgpr2_sgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_64_xexec = COPY $sgpr4_sgpr5
+    ; GCN: [[COPY3:%[0-9]+]]:sreg_64_xexec = COPY $sgpr6_sgpr7
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_256 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3, [[COPY2]], %subreg.sub4_sub5, [[COPY3]], %subreg.sub6_sub7
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<4 x s16>) = COPY $sgpr0_sgpr1
+    %1:sgpr(<4 x s16>) = COPY $sgpr2_sgpr3
+    %2:sgpr(<4 x s16>) = COPY $sgpr4_sgpr5
+    %3:sgpr(<4 x s16>) = COPY $sgpr6_sgpr7
+    %4:sgpr(<16 x s16>) = G_CONCAT_VECTORS %0, %1, %2, %3
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY %4
+...
+
+---
+name: test_concat_vectors_s_v12s16_s_v8s16_s_v8s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4_sgpr5_sgpr6_sgpr7
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v12s16_s_v8s16_s_v8s16
+    ; GCN: [[COPY:%[0-9]+]]:sreg_128 = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_128 = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_256 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1_sub2_sub3, [[COPY1]], %subreg.sub4_sub5_sub6_sub7
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<8 x s16>) = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    %1:sgpr(<8 x s16>) = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    %2:sgpr(<16 x s16>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY %2
+...
+
+---
+name: test_concat_vectors_s_v32s16_s_v12s16_s_v12s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7, $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v32s16_s_v12s16_s_v12s16
+    ; GCN: [[COPY:%[0-9]+]]:sreg_256 = COPY $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_256 = COPY $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_512 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7, [[COPY1]], %subreg.sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<16 x s16>) = COPY $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7,
+    %1:sgpr(<16 x s16>) = COPY $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+    %4:sgpr(<32 x s16>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY %4
+...
+
+---
+name: test_concat_vectors_s_v32s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5, $sgpr6_sgpr7, $sgpr8_sgpr9, $sgpr10_sgpr11, $sgpr12_sgpr13, $sgpr14_sgpr15
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v32s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16_s_v4s16
+    ; GCN: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY $sgpr2_sgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_64_xexec = COPY $sgpr4_sgpr5
+    ; GCN: [[COPY3:%[0-9]+]]:sreg_64_xexec = COPY $sgpr6_sgpr7
+    ; GCN: [[COPY4:%[0-9]+]]:sreg_64_xexec = COPY $sgpr8_sgpr9
+    ; GCN: [[COPY5:%[0-9]+]]:sreg_64_xexec = COPY $sgpr10_sgpr11
+    ; GCN: [[COPY6:%[0-9]+]]:sreg_64_xexec = COPY $sgpr12_sgpr13
+    ; GCN: [[COPY7:%[0-9]+]]:sreg_64_xexec = COPY $sgpr14_sgpr15
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_512 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3, [[COPY2]], %subreg.sub4_sub5, [[COPY3]], %subreg.sub6_sub7, [[COPY4]], %subreg.sub8_sub9, [[COPY5]], %subreg.sub10_sub11, [[COPY6]], %subreg.sub12_sub13, [[COPY7]], %subreg.sub14_sub15
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<4 x s16>) = COPY $sgpr0_sgpr1
+    %1:sgpr(<4 x s16>) = COPY $sgpr2_sgpr3
+    %2:sgpr(<4 x s16>) = COPY $sgpr4_sgpr5
+    %3:sgpr(<4 x s16>) = COPY $sgpr6_sgpr7
+    %4:sgpr(<4 x s16>) = COPY $sgpr8_sgpr9
+    %5:sgpr(<4 x s16>) = COPY $sgpr10_sgpr11
+    %6:sgpr(<4 x s16>) = COPY $sgpr12_sgpr13
+    %7:sgpr(<4 x s16>) = COPY $sgpr14_sgpr15
+    %8:sgpr(<32 x s16>) = G_CONCAT_VECTORS %0, %1, %2, %3, %4, %5, %6, %7
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY %8
+...
+
+---
+name: test_concat_vectors_v_v512_v_v64_v_v64_v_v64_v_v64_v_v64_v_v64_v_v64_v_v64
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5, $vgpr6_vgpr7, $vgpr8_vgpr9, $vgpr10_vgpr11, $vgpr12_vgpr13, $vgpr14_vgpr15
+
+    ; GCN-LABEL: name: test_concat_vectors_v_v512_v_v64_v_v64_v_v64_v_v64_v_v64_v_v64_v_v64_v_v64
+    ; GCN: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GCN: [[COPY3:%[0-9]+]]:vreg_64 = COPY $vgpr6_vgpr7
+    ; GCN: [[COPY4:%[0-9]+]]:vreg_64 = COPY $vgpr8_vgpr9
+    ; GCN: [[COPY5:%[0-9]+]]:vreg_64 = COPY $vgpr10_vgpr11
+    ; GCN: [[COPY6:%[0-9]+]]:vreg_64 = COPY $vgpr12_vgpr13
+    ; GCN: [[COPY7:%[0-9]+]]:vreg_64 = COPY $vgpr14_vgpr15
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_512 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3, [[COPY2]], %subreg.sub4_sub5, [[COPY3]], %subreg.sub6_sub7, [[COPY4]], %subreg.sub8_sub9, [[COPY5]], %subreg.sub10_sub11, [[COPY6]], %subreg.sub12_sub13, [[COPY7]], %subreg.sub14_sub15
+    ; GCN: $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9_vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(<4 x s16>) = COPY $vgpr0_vgpr1
+    %1:vgpr(<4 x s16>) = COPY $vgpr2_vgpr3
+    %2:vgpr(<4 x s16>) = COPY $vgpr4_vgpr5
+    %3:vgpr(<4 x s16>) = COPY $vgpr6_vgpr7
+    %4:vgpr(<4 x s16>) = COPY $vgpr8_vgpr9
+    %5:vgpr(<4 x s16>) = COPY $vgpr10_vgpr11
+    %6:vgpr(<4 x s16>) = COPY $vgpr12_vgpr13
+    %7:vgpr(<4 x s16>) = COPY $vgpr14_vgpr15
+    %8:vgpr(<32 x s16>) = G_CONCAT_VECTORS %0, %1, %2, %3, %4, %5, %6, %7
+    $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9_vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15 = COPY %8
+...
+
+
+
+
+
+
+---
+name: test_concat_vectors_s_v4s32_s_v2s32_s_v2s32
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v4s32_s_v2s32_s_v2s32
+    ; GCN: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY $sgpr2_sgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<2 x s32>) = COPY $sgpr0_sgpr1
+    %1:sgpr(<2 x s32>) = COPY $sgpr2_sgpr3
+    %4:sgpr(<4 x s32>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3 = COPY %4
+...
+
+---
+name: test_concat_vectors_v_v4s32_v_v2s32_v_v2s32
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
+
+    ; GCN-LABEL: name: test_concat_vectors_v_v4s32_v_v2s32_v_v2s32
+    ; GCN: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3
+    ; GCN: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(<2 x s32>) = COPY $vgpr0_vgpr1
+    %1:vgpr(<2 x s32>) = COPY $vgpr2_vgpr3
+    %2:vgpr(<4 x s32>) = G_CONCAT_VECTORS %0, %1
+    $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %2
+...
+
+---
+name: test_concat_vectors_s_v8s32_s_v2s32_s_v2s32_s_v2s32_s_v2s32
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5, $sgpr6_sgpr7
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v8s32_s_v2s32_s_v2s32_s_v2s32_s_v2s32
+    ; GCN: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY $sgpr2_sgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_64_xexec = COPY $sgpr4_sgpr5
+    ; GCN: [[COPY3:%[0-9]+]]:sreg_64_xexec = COPY $sgpr6_sgpr7
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_256 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3, [[COPY2]], %subreg.sub4_sub5, [[COPY3]], %subreg.sub6_sub7
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<2 x s32>) = COPY $sgpr0_sgpr1
+    %1:sgpr(<2 x s32>) = COPY $sgpr2_sgpr3
+    %2:sgpr(<2 x s32>) = COPY $sgpr4_sgpr5
+    %3:sgpr(<2 x s32>) = COPY $sgpr6_sgpr7
+    %4:sgpr(<8 x s32>) = G_CONCAT_VECTORS %0, %1, %2, %3
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY %4
+...
+
+---
+
+name: test_concat_vectors_s_v8s32_s_v4s32_s_v4s32
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4_sgpr5_sgpr6_sgpr7
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v8s32_s_v4s32_s_v4s32
+    ; GCN: [[COPY:%[0-9]+]]:sreg_128 = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_128 = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_256 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1_sub2_sub3, [[COPY1]], %subreg.sub4_sub5_sub6_sub7
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<4 x s32>) = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    %1:sgpr(<4 x s32>) = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    %2:sgpr(<8 x s32>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY %2
+...
+
+---
+name: test_concat_vectors_s_v16s32_s_v8s32_s_v8s32
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7, $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v16s32_s_v8s32_s_v8s32
+    ; GCN: [[COPY:%[0-9]+]]:sreg_256 = COPY $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_256 = COPY $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_512 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7, [[COPY1]], %subreg.sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<8 x s32>) = COPY $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7,
+    %1:sgpr(<8 x s32>) = COPY $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+    %4:sgpr(<16 x s32>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY %4
+...
+
+---
+name: test_concat_vectors_v_v16s32_v_v2s32_v_v2s32_v_v2s32_v_v2s32_v_v2s32_v_v2s32_v_v2s32_v_v2s32
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5, $vgpr6_vgpr7, $vgpr8_vgpr9, $vgpr10_vgpr11, $vgpr12_vgpr13, $vgpr14_vgpr15
+
+    ; GCN-LABEL: name: test_concat_vectors_v_v16s32_v_v2s32_v_v2s32_v_v2s32_v_v2s32_v_v2s32_v_v2s32_v_v2s32_v_v2s32
+    ; GCN: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GCN: [[COPY3:%[0-9]+]]:vreg_64 = COPY $vgpr6_vgpr7
+    ; GCN: [[COPY4:%[0-9]+]]:vreg_64 = COPY $vgpr8_vgpr9
+    ; GCN: [[COPY5:%[0-9]+]]:vreg_64 = COPY $vgpr10_vgpr11
+    ; GCN: [[COPY6:%[0-9]+]]:vreg_64 = COPY $vgpr12_vgpr13
+    ; GCN: [[COPY7:%[0-9]+]]:vreg_64 = COPY $vgpr14_vgpr15
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_512 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3, [[COPY2]], %subreg.sub4_sub5, [[COPY3]], %subreg.sub6_sub7, [[COPY4]], %subreg.sub8_sub9, [[COPY5]], %subreg.sub10_sub11, [[COPY6]], %subreg.sub12_sub13, [[COPY7]], %subreg.sub14_sub15
+    ; GCN: $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9_vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(<2 x s32>) = COPY $vgpr0_vgpr1
+    %1:vgpr(<2 x s32>) = COPY $vgpr2_vgpr3
+    %2:vgpr(<2 x s32>) = COPY $vgpr4_vgpr5
+    %3:vgpr(<2 x s32>) = COPY $vgpr6_vgpr7
+    %4:vgpr(<2 x s32>) = COPY $vgpr8_vgpr9
+    %5:vgpr(<2 x s32>) = COPY $vgpr10_vgpr11
+    %6:vgpr(<2 x s32>) = COPY $vgpr12_vgpr13
+    %7:vgpr(<2 x s32>) = COPY $vgpr14_vgpr15
+    %8:vgpr(<16 x s32>) = G_CONCAT_VECTORS %0, %1, %2, %3, %4, %5, %6, %7
+    $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9_vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15 = COPY %8
+...
+
+---
+name: test_concat_vectors_s_v4s64_s_v2s64_s_v2s64
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4_sgpr5_sgpr6_sgpr7
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v4s64_s_v2s64_s_v2s64
+    ; GCN: [[COPY:%[0-9]+]]:sreg_128 = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_128 = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_256 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1_sub2_sub3, [[COPY1]], %subreg.sub4_sub5_sub6_sub7
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<2 x s64>) = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    %1:sgpr(<2 x s64>) = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    %3:sgpr(<4 x s64>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY %3
+...
+
+---
+name: test_concat_vectors_s_v6s64_s_v3s64_s_v3s64
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7, $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v6s64_s_v3s64_s_v3s64
+    ; GCN: [[DEF:%[0-9]+]]:sgpr(<3 x s64>) = G_IMPLICIT_DEF
+    ; GCN: [[DEF1:%[0-9]+]]:sgpr(<3 x s64>) = G_IMPLICIT_DEF
+    ; GCN: [[CONCAT_VECTORS:%[0-9]+]]:sgpr(<6 x s64>) = G_CONCAT_VECTORS [[DEF]](<3 x s64>), [[DEF1]](<3 x s64>)
+    ; GCN: S_ENDPGM 0, implicit [[CONCAT_VECTORS]](<6 x s64>)
+    %0:sgpr(<3 x s64>) = G_IMPLICIT_DEF
+    %1:sgpr(<3 x s64>) = G_IMPLICIT_DEF
+    %2:sgpr(<6 x s64>) = G_CONCAT_VECTORS %0, %1
+    S_ENDPGM 0, implicit %2
+...
+
+---
+name: test_concat_vectors_s_v8s64_s_v4s64_s_v4s64
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7, $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v8s64_s_v4s64_s_v4s64
+    ; GCN: [[COPY:%[0-9]+]]:sgpr(<4 x s64>) = COPY $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[COPY1:%[0-9]+]]:sgpr(<4 x s64>) = COPY $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+    ; GCN: [[CONCAT_VECTORS:%[0-9]+]]:sgpr(<8 x s64>) = G_CONCAT_VECTORS [[COPY]](<4 x s64>), [[COPY1]](<4 x s64>)
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY [[CONCAT_VECTORS]](<8 x s64>)
+    %0:sgpr(<4 x s64>) = COPY $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7,
+    %1:sgpr(<4 x s64>) = COPY $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+    %4:sgpr(<8 x s64>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY %4
+...
+
+---
+name: test_concat_vectors_s_v8s64_s_v2s64_s_v2s64_s_v2s64_s_v2s64
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4_sgpr5_sgpr6_sgpr7, $sgpr8_sgpr9_sgpr10_sgpr11, $sgpr12_sgpr13_sgpr14_sgpr15
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v8s64_s_v2s64_s_v2s64_s_v2s64_s_v2s64
+    ; GCN: [[COPY:%[0-9]+]]:sreg_128 = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_128 = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_128 = COPY $sgpr8_sgpr9_sgpr10_sgpr11
+    ; GCN: [[COPY3:%[0-9]+]]:sreg_128 = COPY $sgpr12_sgpr13_sgpr14_sgpr15
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_512 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1_sub2_sub3, [[COPY1]], %subreg.sub4_sub5_sub6_sub7, [[COPY2]], %subreg.sub8_sub9_sub10_sub11, [[COPY3]], %subreg.sub12_sub13_sub14_sub15
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<2 x s64>) = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    %1:sgpr(<2 x s64>) = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    %2:sgpr(<2 x s64>) = COPY $sgpr8_sgpr9_sgpr10_sgpr11
+    %3:sgpr(<2 x s64>) = COPY $sgpr12_sgpr13_sgpr14_sgpr15
+    %4:sgpr(<8 x s64>) = G_CONCAT_VECTORS %0, %1, %2, %3
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY %4
+...
+
+---
+name: test_concat_vectors_s_v4p1_s_v2p1_s_v2p1
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4_sgpr5_sgpr6_sgpr7
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v4p1_s_v2p1_s_v2p1
+    ; GCN: [[COPY:%[0-9]+]]:sgpr(<2 x p1>) = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    ; GCN: [[COPY1:%[0-9]+]]:sgpr(<2 x p1>) = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[CONCAT_VECTORS:%[0-9]+]]:sgpr(<4 x p1>) = G_CONCAT_VECTORS [[COPY]](<2 x p1>), [[COPY1]](<2 x p1>)
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY [[CONCAT_VECTORS]](<4 x p1>)
+    %0:sgpr(<2 x p1>) = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    %1:sgpr(<2 x p1>) = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    %3:sgpr(<4 x p1>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY %3
+...
+
+---
+name: test_concat_vectors_s_v4p3_s_v2p3_s_v2p3
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v4p3_s_v2p3_s_v2p3
+    ; GCN: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY $sgpr2_sgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(<2 x p3>) = COPY $sgpr0_sgpr1
+    %1:sgpr(<2 x p3>) = COPY $sgpr2_sgpr3
+    %2:sgpr(<4 x p3>) = G_CONCAT_VECTORS %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3 = COPY %2
+...
+
+---
+name: test_concat_vectors_s_v8p3_s_v2p3_s_v2p3_v2p3_s_v2p3
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5, $sgpr6_sgpr7
+
+    ; GCN-LABEL: name: test_concat_vectors_s_v8p3_s_v2p3_s_v2p3_v2p3_s_v2p3
+    ; GCN: [[COPY:%[0-9]+]]:sgpr(<2 x p3>) = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sgpr(<2 x p3>) = COPY $sgpr2_sgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:sgpr(<2 x p3>) = COPY $sgpr4_sgpr5
+    ; GCN: [[COPY3:%[0-9]+]]:sgpr(<2 x p3>) = COPY $sgpr6_sgpr7
+    ; GCN: [[CONCAT_VECTORS:%[0-9]+]]:sgpr(<8 x p3>) = G_CONCAT_VECTORS [[COPY]](<2 x p3>), [[COPY1]](<2 x p3>), [[COPY2]](<2 x p3>), [[COPY3]](<2 x p3>)
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY [[CONCAT_VECTORS]](<8 x p3>)
+    %0:sgpr(<2 x p3>) = COPY $sgpr0_sgpr1
+    %1:sgpr(<2 x p3>) = COPY $sgpr2_sgpr3
+    %2:sgpr(<2 x p3>) = COPY $sgpr4_sgpr5
+    %3:sgpr(<2 x p3>) = COPY $sgpr6_sgpr7
+    %4:sgpr(<8 x p3>) = G_CONCAT_VECTORS %0, %1, %2, %3
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY %4
+...
Index: test/CodeGen/AMDGPU/GlobalISel/inst-select-merge-values.mir
===================================================================
--- /dev/null
+++ test/CodeGen/AMDGPU/GlobalISel/inst-select-merge-values.mir
@@ -0,0 +1,565 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=instruction-select -verify-machineinstrs -global-isel-abort=2 -pass-remarks-missed='gisel*'  -o - %s 2> %t | FileCheck -check-prefix=GCN  %s
+# RUN: FileCheck -check-prefix=ERR %s < %t
+
+
+# ERR-NOT: remark:
+# ERR: remark: <unknown>:0:0: cannot select: %3:sgpr(s192) = G_MERGE_VALUES %0:sgpr(s64), %1:sgpr(s64), %2:sgpr(s64) (in function: test_merge_values_s_s192_s_s64_s_s64_s_s64)
+# ERR-NEXT: remark: <unknown>:0:0: cannot select: %3:vgpr(s192) = G_MERGE_VALUES %0:vgpr(s64), %1:vgpr(s64), %2:vgpr(s64) (in function: test_merge_values_v_s192_v_s64_v_s64_v_s64)
+# ERR-NOT: remark:
+
+---
+name: test_merge_values_v_s64_v_s32_v_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; GCN-LABEL: name: test_merge_values_v_s64_v_s32_v_s32
+    ; GCN: liveins: $vgpr0, $vgpr1
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
+    ; GCN: S_ENDPGM 0, implicit [[REG_SEQUENCE]]
+    %0:vgpr(s32) = COPY $vgpr0
+    %1:vgpr(s32) = COPY $vgpr1
+    %2:vgpr(s64) = G_MERGE_VALUES %0, %1
+    S_ENDPGM 0, implicit %2
+...
+
+---
+name: test_merge_values_v_s64_s_s32_v_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $vgpr0
+
+    ; GCN-LABEL: name: test_merge_values_v_s64_s_s32_v_s32
+    ; GCN: liveins: $sgpr0, $vgpr0
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
+    ; GCN: S_ENDPGM 0, implicit [[REG_SEQUENCE]]
+    %0:sgpr(s32) = COPY $sgpr0
+    %1:vgpr(s32) = COPY $vgpr0
+    %2:vgpr(s64) = G_MERGE_VALUES %0, %1
+    S_ENDPGM 0, implicit %2
+...
+
+---
+name: test_merge_values_v_s64_v_s32_s_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $vgpr0
+
+    ; GCN-LABEL: name: test_merge_values_v_s64_v_s32_s_s32
+    ; GCN: liveins: $sgpr0, $vgpr0
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
+    ; GCN: S_ENDPGM 0, implicit [[REG_SEQUENCE]]
+    %0:vgpr(s32) = COPY $vgpr0
+    %1:sgpr(s32) = COPY $sgpr0
+    %2:vgpr(s64) = G_MERGE_VALUES %0, %1
+    S_ENDPGM 0, implicit %2
+...
+
+---
+name: test_merge_values_s_s64_s_s32_s_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $sgpr1
+
+    ; GCN-LABEL: name: test_merge_values_s_s64_s_s32_s_s32
+    ; GCN: liveins: $sgpr0, $sgpr1
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr1
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_64_xexec = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
+    ; GCN: S_ENDPGM 0, implicit [[REG_SEQUENCE]]
+    %0:sgpr(s32) = COPY $sgpr0
+    %1:sgpr(s32) = COPY $sgpr1
+    %2:sgpr(s64) = G_MERGE_VALUES %0, %1
+    S_ENDPGM 0, implicit %2
+...
+
+---
+name: test_merge_values_s_s64_undef_s_s32_s_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0
+
+    ; GCN-LABEL: name: test_merge_values_s_s64_undef_s_s32_s_s32
+    ; GCN: liveins: $sgpr0
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_64_xexec = REG_SEQUENCE undef %2:sreg_32_xm0, %subreg.sub0, [[COPY]], %subreg.sub1
+    ; GCN: S_ENDPGM 0, implicit [[REG_SEQUENCE]]
+    %1:sgpr(s32) = COPY $sgpr0
+    %2:sgpr(s64) = G_MERGE_VALUES undef %0:sgpr(s32), %1
+    S_ENDPGM 0, implicit %2
+...
+
+---
+name: test_merge_values_s_s64_s_s32_undef_s_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0
+
+    ; GCN-LABEL: name: test_merge_values_s_s64_s_s32_undef_s_s32
+    ; GCN: liveins: $sgpr0
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_64_xexec = REG_SEQUENCE [[COPY]], %subreg.sub0, undef %2:sreg_32_xm0, %subreg.sub1
+    ; GCN: S_ENDPGM 0, implicit [[REG_SEQUENCE]]
+    %0:sgpr(s32) = COPY $sgpr0
+    %2:sgpr(s64) = G_MERGE_VALUES %0, undef %1:sgpr(s32),
+    S_ENDPGM 0, implicit %2
+...
+
+---
+name: test_merge_values_s_s96_s_s32_s_s32_s_s32
+legalized:       true
+regBankSelected: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $sgpr1, $sgpr2
+
+    ; GCN-LABEL: name: test_merge_values_s_s96_s_s32_s_s32_s_s32
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr2
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_96 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2
+    ; GCN: $sgpr0_sgpr1_sgpr2 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(s32) = COPY $sgpr0
+    %1:sgpr(s32) = COPY $sgpr1
+    %2:sgpr(s32) = COPY $sgpr2
+    %3:sgpr(s96) = G_MERGE_VALUES %0, %1, %2
+    $sgpr0_sgpr1_sgpr2 = COPY %3
+...
+
+---
+name: test_merge_values_v_s96_v_s32_v_s32_v_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2
+
+    ; GCN-LABEL: name: test_merge_values_v_s96_v_s32_v_s32_v_s32
+    ; GCN: liveins: $vgpr0, $vgpr1, $vgpr2
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_96 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2
+    ; GCN: $vgpr0_vgpr1_vgpr2 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(s32) = COPY $vgpr0
+    %1:vgpr(s32) = COPY $vgpr1
+    %2:vgpr(s32) = COPY $vgpr2
+    %3:vgpr(s96) = G_MERGE_VALUES %0, %1, %2
+    $vgpr0_vgpr1_vgpr2 = COPY %3
+...
+
+---
+name: test_merge_values_s_s128_s_s32_s_s32_s_s32_s_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $sgpr1, $sgpr2, $sgpr3
+
+    ; GCN-LABEL: name: test_merge_values_s_s128_s_s32_s_s32_s_s32_s_s32
+    ; GCN: liveins: $sgpr0, $sgpr1, $sgpr2, $sgpr3
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr2
+    ; GCN: [[COPY3:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2, [[COPY3]], %subreg.sub3
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(s32) = COPY $sgpr0
+    %1:sgpr(s32) = COPY $sgpr1
+    %2:sgpr(s32) = COPY $sgpr2
+    %3:sgpr(s32) = COPY $sgpr3
+    %4:sgpr(s128) = G_MERGE_VALUES %0, %1, %2, %3
+    $sgpr0_sgpr1_sgpr2_sgpr3 = COPY %4
+...
+
+---
+name: test_merge_values_v_s128_v_s32_v_s32_v_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3
+
+    ; GCN-LABEL: name: test_merge_values_v_s128_v_s32_v_s32_v_s32
+    ; GCN: liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GCN: [[COPY3:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2, [[COPY3]], %subreg.sub3
+    ; GCN: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(s32) = COPY $vgpr0
+    %1:vgpr(s32) = COPY $vgpr1
+    %2:vgpr(s32) = COPY $vgpr2
+    %3:vgpr(s32) = COPY $vgpr3
+    %4:vgpr(s128) = G_MERGE_VALUES %0, %1, %2, %3
+    $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %4
+...
+
+---
+name: test_merge_values_s_s128_s_s64_s_s64
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3
+
+    ; GCN-LABEL: name: test_merge_values_s_s128_s_s64_s_s64
+    ; GCN: liveins: $sgpr0_sgpr1, $sgpr2_sgpr3
+    ; GCN: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY $sgpr2_sgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(s64) = COPY $sgpr0_sgpr1
+    %1:sgpr(s64) = COPY $sgpr2_sgpr3
+    %4:sgpr(s128) = G_MERGE_VALUES %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3 = COPY %4
+...
+
+---
+name: test_merge_values_v_s128_v_s64_v_s64
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
+
+    ; GCN-LABEL: name: test_merge_values_v_s128_v_s64_v_s64
+    ; GCN: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
+    ; GCN: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3
+    ; GCN: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(s64) = COPY $vgpr0_vgpr1
+    %1:vgpr(s64) = COPY $vgpr2_vgpr3
+    %2:vgpr(s128) = G_MERGE_VALUES %0, %1
+    $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %2
+...
+
+---
+name: test_merge_values_s_s160_s_s32_s_s32_s_s32_s_s32_s_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $sgpr1, $sgpr2, $sgpr3, $sgpr4
+
+    ; GCN-LABEL: name: test_merge_values_s_s160_s_s32_s_s32_s_s32_s_s32_s_s32
+    ; GCN: liveins: $sgpr0, $sgpr1, $sgpr2, $sgpr3, $sgpr4
+    ; GCN: [[COPY:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr2
+    ; GCN: [[COPY3:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr3
+    ; GCN: [[COPY4:%[0-9]+]]:sreg_32_xm0 = COPY $sgpr4
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_160 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2, [[COPY3]], %subreg.sub3, [[COPY4]], %subreg.sub4
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(s32) = COPY $sgpr0
+    %1:sgpr(s32) = COPY $sgpr1
+    %2:sgpr(s32) = COPY $sgpr2
+    %3:sgpr(s32) = COPY $sgpr3
+    %4:sgpr(s32) = COPY $sgpr4
+    %5:sgpr(s160) = G_MERGE_VALUES %0, %1, %2, %3, %4
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4 = COPY %5
+...
+
+---
+name: test_merge_values_v_s160_v_s32_v_s32_v_s32_v_s32_v_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3, $vgpr4
+
+    ; GCN-LABEL: name: test_merge_values_v_s160_v_s32_v_s32_v_s32_v_s32_v_s32
+    ; GCN: liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3, $vgpr4
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GCN: [[COPY3:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GCN: [[COPY4:%[0-9]+]]:vgpr_32 = COPY $vgpr4
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_160 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1, [[COPY2]], %subreg.sub2, [[COPY3]], %subreg.sub3, [[COPY4]], %subreg.sub4
+    ; GCN: $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(s32) = COPY $vgpr0
+    %1:vgpr(s32) = COPY $vgpr1
+    %2:vgpr(s32) = COPY $vgpr2
+    %3:vgpr(s32) = COPY $vgpr3
+    %4:vgpr(s32) = COPY $vgpr4
+    %5:vgpr(s160) = G_MERGE_VALUES %0, %1, %2, %3, %4
+    $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4 = COPY %5
+...
+
+---
+name: test_merge_values_s_s192_s_s64_s_s64_s_s64
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5
+
+    ; GCN-LABEL: name: test_merge_values_s_s192_s_s64_s_s64_s_s64
+    ; GCN: liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5
+    ; GCN: [[COPY:%[0-9]+]]:sgpr(s64) = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sgpr(s64) = COPY $sgpr2_sgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:sgpr(s64) = COPY $sgpr4_sgpr5
+    ; GCN: [[MV:%[0-9]+]]:sgpr(s192) = G_MERGE_VALUES [[COPY]](s64), [[COPY1]](s64), [[COPY2]](s64)
+    ; GCN: S_ENDPGM 0, implicit [[MV]](s192)
+    %0:sgpr(s64) = COPY $sgpr0_sgpr1
+    %1:sgpr(s64) = COPY $sgpr2_sgpr3
+    %2:sgpr(s64) = COPY $sgpr4_sgpr5
+    %3:sgpr(s192) = G_MERGE_VALUES %0, %1, %2
+    S_ENDPGM 0, implicit %3
+...
+
+---
+name: test_merge_values_v_s192_v_s64_v_s64_v_s64
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+
+    ; GCN-LABEL: name: test_merge_values_v_s192_v_s64_v_s64_v_s64
+    ; GCN: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GCN: [[COPY:%[0-9]+]]:vgpr(s64) = COPY $vgpr0_vgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr(s64) = COPY $vgpr2_vgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:vgpr(s64) = COPY $vgpr4_vgpr5
+    ; GCN: [[MV:%[0-9]+]]:vgpr(s192) = G_MERGE_VALUES [[COPY]](s64), [[COPY1]](s64), [[COPY2]](s64)
+    ; GCN: S_ENDPGM 0, implicit [[MV]](s192)
+    %0:vgpr(s64) = COPY $vgpr0_vgpr1
+    %1:vgpr(s64) = COPY $vgpr2_vgpr3
+    %2:vgpr(s64) = COPY $vgpr4_vgpr5
+    %3:vgpr(s192) = G_MERGE_VALUES %0, %1, %2
+    S_ENDPGM 0, implicit %3
+...
+
+---
+name: test_merge_values_s_s256_s_s64_s_s64_s_s64_s_s64
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5, $sgpr6_sgpr7
+
+    ; GCN-LABEL: name: test_merge_values_s_s256_s_s64_s_s64_s_s64_s_s64
+    ; GCN: liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5, $sgpr6_sgpr7
+    ; GCN: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY $sgpr2_sgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_64_xexec = COPY $sgpr4_sgpr5
+    ; GCN: [[COPY3:%[0-9]+]]:sreg_64_xexec = COPY $sgpr6_sgpr7
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_256 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3, [[COPY2]], %subreg.sub4_sub5, [[COPY3]], %subreg.sub6_sub7
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(s64) = COPY $sgpr0_sgpr1
+    %1:sgpr(s64) = COPY $sgpr2_sgpr3
+    %2:sgpr(s64) = COPY $sgpr4_sgpr5
+    %3:sgpr(s64) = COPY $sgpr6_sgpr7
+    %4:sgpr(s256) = G_MERGE_VALUES %0, %1, %2, %3
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY %4
+...
+
+---
+name: test_merge_values_s_s256_s_s128_s_s128
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4_sgpr5_sgpr6_sgpr7
+
+    ; GCN-LABEL: name: test_merge_values_s_s256_s_s128_s_s128
+    ; GCN: liveins: $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[COPY:%[0-9]+]]:sreg_128 = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_128 = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_256 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1_sub2_sub3, [[COPY1]], %subreg.sub4_sub5_sub6_sub7
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(s128) = COPY $sgpr0_sgpr1_sgpr2_sgpr3
+    %1:sgpr(s128) = COPY $sgpr4_sgpr5_sgpr6_sgpr7
+    %2:sgpr(s256) = G_MERGE_VALUES %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7 = COPY %2
+...
+
+---
+name: test_merge_values_s_s512_s_s256_s_s256
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7, $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+
+    ; GCN-LABEL: name: test_merge_values_s_s512_s_s256_s_s256
+    ; GCN: liveins: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7, $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+    ; GCN: [[COPY:%[0-9]+]]:sreg_256 = COPY $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_256 = COPY $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_512 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7, [[COPY1]], %subreg.sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(s256) = COPY $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7,
+    %1:sgpr(s256) = COPY $sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15
+    %4:sgpr(s512) = G_MERGE_VALUES %0, %1
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY %4
+...
+
+---
+name: test_merge_values_s_s512_s_s64_s_s64_s_s64_s_s64_s_s64_s_s64_s_s64_s_s64
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5, $sgpr6_sgpr7, $sgpr8_sgpr9, $sgpr10_sgpr11, $sgpr12_sgpr13, $sgpr14_sgpr15
+
+    ; GCN-LABEL: name: test_merge_values_s_s512_s_s64_s_s64_s_s64_s_s64_s_s64_s_s64_s_s64_s_s64
+    ; GCN: liveins: $sgpr0_sgpr1, $sgpr2_sgpr3, $sgpr4_sgpr5, $sgpr6_sgpr7, $sgpr8_sgpr9, $sgpr10_sgpr11, $sgpr12_sgpr13, $sgpr14_sgpr15
+    ; GCN: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY $sgpr0_sgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY $sgpr2_sgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:sreg_64_xexec = COPY $sgpr4_sgpr5
+    ; GCN: [[COPY3:%[0-9]+]]:sreg_64_xexec = COPY $sgpr6_sgpr7
+    ; GCN: [[COPY4:%[0-9]+]]:sreg_64_xexec = COPY $sgpr8_sgpr9
+    ; GCN: [[COPY5:%[0-9]+]]:sreg_64_xexec = COPY $sgpr10_sgpr11
+    ; GCN: [[COPY6:%[0-9]+]]:sreg_64_xexec = COPY $sgpr12_sgpr13
+    ; GCN: [[COPY7:%[0-9]+]]:sreg_64_xexec = COPY $sgpr14_sgpr15
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:sreg_512 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3, [[COPY2]], %subreg.sub4_sub5, [[COPY3]], %subreg.sub6_sub7, [[COPY4]], %subreg.sub8_sub9, [[COPY5]], %subreg.sub10_sub11, [[COPY6]], %subreg.sub12_sub13, [[COPY7]], %subreg.sub14_sub15
+    ; GCN: $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY [[REG_SEQUENCE]]
+    %0:sgpr(s64) = COPY $sgpr0_sgpr1
+    %1:sgpr(s64) = COPY $sgpr2_sgpr3
+    %2:sgpr(s64) = COPY $sgpr4_sgpr5
+    %3:sgpr(s64) = COPY $sgpr6_sgpr7
+    %4:sgpr(s64) = COPY $sgpr8_sgpr9
+    %5:sgpr(s64) = COPY $sgpr10_sgpr11
+    %6:sgpr(s64) = COPY $sgpr12_sgpr13
+    %7:sgpr(s64) = COPY $sgpr14_sgpr15
+    %8:sgpr(s512) = G_MERGE_VALUES %0, %1, %2, %3, %4, %5, %6, %7
+    $sgpr0_sgpr1_sgpr2_sgpr3_sgpr4_sgpr5_sgpr6_sgpr7_sgpr8_sgpr9_sgpr10_sgpr11_sgpr12_sgpr13_sgpr14_sgpr15 = COPY %8
+...
+
+---
+name: test_merge_values_v_v512_v_s64_v_s64_v_s64_v_s64_v_s64_v_s64_v_s64_v_s64
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5, $vgpr6_vgpr7, $vgpr8_vgpr9, $vgpr10_vgpr11, $vgpr12_vgpr13, $vgpr14_vgpr15
+
+    ; GCN-LABEL: name: test_merge_values_v_v512_v_s64_v_s64_v_s64_v_s64_v_s64_v_s64_v_s64_v_s64
+    ; GCN: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5, $vgpr6_vgpr7, $vgpr8_vgpr9, $vgpr10_vgpr11, $vgpr12_vgpr13, $vgpr14_vgpr15
+    ; GCN: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GCN: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GCN: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GCN: [[COPY3:%[0-9]+]]:vreg_64 = COPY $vgpr6_vgpr7
+    ; GCN: [[COPY4:%[0-9]+]]:vreg_64 = COPY $vgpr8_vgpr9
+    ; GCN: [[COPY5:%[0-9]+]]:vreg_64 = COPY $vgpr10_vgpr11
+    ; GCN: [[COPY6:%[0-9]+]]:vreg_64 = COPY $vgpr12_vgpr13
+    ; GCN: [[COPY7:%[0-9]+]]:vreg_64 = COPY $vgpr14_vgpr15
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_512 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[COPY1]], %subreg.sub2_sub3, [[COPY2]], %subreg.sub4_sub5, [[COPY3]], %subreg.sub6_sub7, [[COPY4]], %subreg.sub8_sub9, [[COPY5]], %subreg.sub10_sub11, [[COPY6]], %subreg.sub12_sub13, [[COPY7]], %subreg.sub14_sub15
+    ; GCN: $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9_vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15 = COPY [[REG_SEQUENCE]]
+    %0:vgpr(s64) = COPY $vgpr0_vgpr1
+    %1:vgpr(s64) = COPY $vgpr2_vgpr3
+    %2:vgpr(s64) = COPY $vgpr4_vgpr5
+    %3:vgpr(s64) = COPY $vgpr6_vgpr7
+    %4:vgpr(s64) = COPY $vgpr8_vgpr9
+    %5:vgpr(s64) = COPY $vgpr10_vgpr11
+    %6:vgpr(s64) = COPY $vgpr12_vgpr13
+    %7:vgpr(s64) = COPY $vgpr14_vgpr15
+    %8:vgpr(s512) = G_MERGE_VALUES %0, %1, %2, %3, %4, %5, %6, %7
+    $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9_vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15 = COPY %8
+...
+
+---
+name: test_merge_values_rc_already_set_src_v_s64_v_s32_v_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; GCN-LABEL: name: test_merge_values_rc_already_set_src_v_s64_v_s32_v_s32
+    ; GCN: liveins: $vgpr0, $vgpr1
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
+    ; GCN: S_ENDPGM 0, implicit [[REG_SEQUENCE]]
+    %0:vgpr_32(s32) = COPY $vgpr0
+    %1:vgpr_32(s32) = COPY $vgpr1
+    %2:vgpr(s64) = G_MERGE_VALUES %0, %1
+    S_ENDPGM 0, implicit %2
+...
+
+---
+name: test_merge_values_rc_already_set_dst_v_s64_v_s32_v_s32
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; GCN-LABEL: name: test_merge_values_rc_already_set_dst_v_s64_v_s32_v_s32
+    ; GCN: liveins: $vgpr0, $vgpr1
+    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
+    ; GCN: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
+    ; GCN: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
+    ; GCN: S_ENDPGM 0, implicit [[REG_SEQUENCE]]
+    %0:vgpr(s32) = COPY $vgpr0
+    %1:vgpr(s32) = COPY $vgpr1
+    %2:vreg_64(s64) = G_MERGE_VALUES %0, %1
+    S_ENDPGM 0, implicit %2
+...