Index: llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.h
===================================================================
--- llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.h
+++ llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.h
@@ -116,6 +116,7 @@
 
   void initM0(MachineInstr &I) const;
   bool selectG_LOAD_ATOMICRMW(MachineInstr &I) const;
+  bool selectG_AMDGPU_ATOMIC_CMPXCHG(MachineInstr &I) const;
   bool selectG_STORE(MachineInstr &I) const;
   bool selectG_SELECT(MachineInstr &I) const;
   bool selectG_BRCOND(MachineInstr &I) const;
Index: llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
+++ llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
@@ -1587,6 +1587,65 @@
   return selectImpl(I, *CoverageInfo);
 }
 
+// TODO: No rtn optimization.
+bool AMDGPUInstructionSelector::selectG_AMDGPU_ATOMIC_CMPXCHG(
+  MachineInstr &MI) const {
+  Register PtrReg = MI.getOperand(1).getReg();
+  const LLT PtrTy = MRI->getType(PtrReg);
+  if (PtrTy.getAddressSpace() == AMDGPUAS::FLAT_ADDRESS ||
+      STI.useFlatForGlobal())
+    return selectImpl(MI, *CoverageInfo);
+
+  Register DstReg = MI.getOperand(0).getReg();
+  const LLT Ty = MRI->getType(DstReg);
+  const bool Is64 = Ty.getSizeInBits() == 64;
+  const unsigned SubReg = Is64 ? AMDGPU::sub0_sub1 : AMDGPU::sub0;
+  Register TmpReg = MRI->createVirtualRegister(
+    Is64 ? &AMDGPU::VReg_128RegClass : &AMDGPU::VReg_64RegClass);
+
+  const DebugLoc &DL = MI.getDebugLoc();
+  MachineBasicBlock *BB = MI.getParent();
+
+  Register VAddr, RSrcReg, SOffset;
+  int64_t Offset = 0;
+
+  unsigned Opcode;
+  if (selectMUBUFOffsetImpl(MI.getOperand(1), RSrcReg, SOffset, Offset)) {
+    Opcode = Is64 ? AMDGPU::BUFFER_ATOMIC_CMPSWAP_X2_OFFSET_RTN :
+                             AMDGPU::BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN;
+  } else if (selectMUBUFAddr64Impl(MI.getOperand(1), VAddr,
+                                   RSrcReg, SOffset, Offset)) {
+    Opcode = Is64 ? AMDGPU::BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN :
+                    AMDGPU::BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN;
+  } else
+    return selectImpl(MI, *CoverageInfo);
+
+  auto MIB = BuildMI(*BB, &MI, DL, TII.get(Opcode), TmpReg)
+    .addReg(MI.getOperand(2).getReg());
+
+  if (VAddr)
+    MIB.addReg(VAddr);
+
+  MIB.addReg(RSrcReg);
+  if (SOffset)
+    MIB.addReg(SOffset);
+  else
+    MIB.addImm(0);
+
+  MIB.addImm(Offset);
+  MIB.addImm(0); // slc
+  MIB.cloneMemRefs(MI);
+
+  BuildMI(*BB, &MI, DL, TII.get(AMDGPU::COPY), DstReg)
+    .addReg(TmpReg, RegState::Kill, SubReg);
+
+  MI.eraseFromParent();
+
+  MRI->setRegClass(
+    DstReg, Is64 ? &AMDGPU::VReg_64RegClass : &AMDGPU::VGPR_32RegClass);
+  return constrainSelectedInstRegOperands(*MIB, TII, TRI, RBI);
+}
+
 bool AMDGPUInstructionSelector::selectG_BRCOND(MachineInstr &I) const {
   MachineBasicBlock *BB = I.getParent();
   MachineOperand &CondOp = I.getOperand(0);
@@ -1959,6 +2018,8 @@
   case TargetOpcode::G_ATOMICRMW_UMAX:
   case TargetOpcode::G_ATOMICRMW_FADD:
     return selectG_LOAD_ATOMICRMW(I);
+  case AMDGPU::G_AMDGPU_ATOMIC_CMPXCHG:
+    return selectG_AMDGPU_ATOMIC_CMPXCHG(I);
   case TargetOpcode::G_SELECT:
     return selectG_SELECT(I);
   case TargetOpcode::G_STORE:
Index: llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-amdgpu-atomic-cmpxchg-global.mir
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-amdgpu-atomic-cmpxchg-global.mir
@@ -0,0 +1,826 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=amdgcn -mcpu=tahiti -run-pass=instruction-select -verify-machineinstrs -o - %s | FileCheck -check-prefix=GFX6 %s
+# RUN: llc -march=amdgcn -mcpu=hawaii -mattr=-flat-for-global -run-pass=instruction-select -verify-machineinstrs -o - %s | FileCheck -check-prefix=GFX7 %s
+# RUN: llc -march=amdgcn -mcpu=hawaii -mattr=+flat-for-global -run-pass=instruction-select -verify-machineinstrs -o - %s | FileCheck -check-prefix=GFX7-FLAT %s
+# RUN: llc -march=amdgcn -mcpu=fiji -run-pass=instruction-select -verify-machineinstrs -o - %s | FileCheck -check-prefix=GFX8 %s
+# RUN: llc -march=amdgcn -mcpu=gfx900 -run-pass=instruction-select -verify-machineinstrs -o - %s | FileCheck -check-prefix=GFX9 %s
+# RUN: llc -march=amdgcn -mcpu=gfx1010 -run-pass=instruction-select -verify-machineinstrs -o - %s | FileCheck -check-prefix=GFX10 %s
+
+---
+name:            amdgpu_atomic_cmpxchg_s32_global
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+
+    ; GFX6-LABEL: name: amdgpu_atomic_cmpxchg_s32_global
+    ; GFX6: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX6: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX6: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX6: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX6: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX6: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX6: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX6: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX6: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX6: [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX6: [[COPY3:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN]].sub0
+    ; GFX6: $vgpr0 = COPY [[COPY3]]
+    ; GFX7-LABEL: name: amdgpu_atomic_cmpxchg_s32_global
+    ; GFX7: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX7: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX7: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX7: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX7: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX7: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX7: [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX7: [[COPY3:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN]].sub0
+    ; GFX7: $vgpr0 = COPY [[COPY3]]
+    ; GFX7-FLAT-LABEL: name: amdgpu_atomic_cmpxchg_s32_global
+    ; GFX7-FLAT: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX7-FLAT: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7-FLAT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7-FLAT: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7-FLAT: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7-FLAT: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX7-FLAT: $vgpr0 = COPY [[FLAT_ATOMIC_CMPSWAP_RTN]]
+    ; GFX8-LABEL: name: amdgpu_atomic_cmpxchg_s32_global
+    ; GFX8: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX8: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX8: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX8: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX8: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX8: $vgpr0 = COPY [[FLAT_ATOMIC_CMPSWAP_RTN]]
+    ; GFX9-LABEL: name: amdgpu_atomic_cmpxchg_s32_global
+    ; GFX9: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX9: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX9: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX9: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX9: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX9: $vgpr0 = COPY [[GLOBAL_ATOMIC_CMPSWAP_RTN]]
+    ; GFX10-LABEL: name: amdgpu_atomic_cmpxchg_s32_global
+    ; GFX10: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX10: $vcc_hi = IMPLICIT_DEF
+    ; GFX10: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX10: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX10: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX10: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX10: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX10: $vgpr0 = COPY [[GLOBAL_ATOMIC_CMPSWAP_RTN]]
+    %0:vgpr(p1) = COPY $vgpr0_vgpr1
+    %1:vgpr(s32) = COPY $vgpr2
+    %2:vgpr(s32) = COPY $vgpr3
+    %3:vgpr(<2 x s32>) = G_BUILD_VECTOR %1, %2
+    %4:vgpr(s32) = G_AMDGPU_ATOMIC_CMPXCHG %0, %3 :: (load store seq_cst 4, addrspace 1)
+    $vgpr0 = COPY %4
+
+...
+
+---
+name:            amdgpu_atomic_cmpxchg_s32_global_gep4
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+
+    ; GFX6-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gep4
+    ; GFX6: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX6: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX6: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX6: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX6: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX6: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX6: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX6: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX6: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX6: [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 4, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX6: [[COPY3:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN]].sub0
+    ; GFX6: $vgpr0 = COPY [[COPY3]]
+    ; GFX7-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gep4
+    ; GFX7: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX7: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX7: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX7: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX7: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX7: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX7: [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 4, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX7: [[COPY3:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN]].sub0
+    ; GFX7: $vgpr0 = COPY [[COPY3]]
+    ; GFX7-FLAT-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gep4
+    ; GFX7-FLAT: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX7-FLAT: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7-FLAT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7-FLAT: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7-FLAT: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7-FLAT: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 4, implicit $exec
+    ; GFX7-FLAT: [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
+    ; GFX7-FLAT: [[REG_SEQUENCE1:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_MOV_B32_e32_]], %subreg.sub0, [[V_MOV_B32_e32_1]], %subreg.sub1
+    ; GFX7-FLAT: [[COPY3:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub0
+    ; GFX7-FLAT: [[COPY4:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub0
+    ; GFX7-FLAT: [[COPY5:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub1
+    ; GFX7-FLAT: [[COPY6:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub1
+    ; GFX7-FLAT: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64_xexec = V_ADD_I32_e64 [[COPY3]], [[COPY4]], 0, implicit $exec
+    ; GFX7-FLAT: %12:vgpr_32, dead %14:sreg_64_xexec = V_ADDC_U32_e64 [[COPY5]], [[COPY6]], killed [[V_ADD_I32_e64_1]], 0, implicit $exec
+    ; GFX7-FLAT: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_ADD_I32_e64_]], %subreg.sub0, %12, %subreg.sub1
+    ; GFX7-FLAT: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[REG_SEQUENCE2]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX7-FLAT: $vgpr0 = COPY [[FLAT_ATOMIC_CMPSWAP_RTN]]
+    ; GFX8-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gep4
+    ; GFX8: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX8: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX8: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX8: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX8: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 4, implicit $exec
+    ; GFX8: [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
+    ; GFX8: [[REG_SEQUENCE1:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_MOV_B32_e32_]], %subreg.sub0, [[V_MOV_B32_e32_1]], %subreg.sub1
+    ; GFX8: [[COPY3:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub0
+    ; GFX8: [[COPY4:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub0
+    ; GFX8: [[COPY5:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub1
+    ; GFX8: [[COPY6:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub1
+    ; GFX8: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64_xexec = V_ADD_I32_e64 [[COPY3]], [[COPY4]], 0, implicit $exec
+    ; GFX8: %12:vgpr_32, dead %14:sreg_64_xexec = V_ADDC_U32_e64 [[COPY5]], [[COPY6]], killed [[V_ADD_I32_e64_1]], 0, implicit $exec
+    ; GFX8: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_ADD_I32_e64_]], %subreg.sub0, %12, %subreg.sub1
+    ; GFX8: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[REG_SEQUENCE2]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX8: $vgpr0 = COPY [[FLAT_ATOMIC_CMPSWAP_RTN]]
+    ; GFX9-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gep4
+    ; GFX9: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX9: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX9: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX9: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX9: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], 4, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX9: $vgpr0 = COPY [[GLOBAL_ATOMIC_CMPSWAP_RTN]]
+    ; GFX10-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gep4
+    ; GFX10: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX10: $vcc_hi = IMPLICIT_DEF
+    ; GFX10: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX10: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX10: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX10: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX10: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], 4, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX10: $vgpr0 = COPY [[GLOBAL_ATOMIC_CMPSWAP_RTN]]
+    %0:vgpr(p1) = COPY $vgpr0_vgpr1
+    %1:vgpr(s32) = COPY $vgpr2
+    %2:vgpr(s32) = COPY $vgpr3
+    %3:vgpr(<2 x s32>) = G_BUILD_VECTOR %1, %2
+    %4:vgpr(s64) = G_CONSTANT i64 4
+    %5:vgpr(p1) = G_PTR_ADD %0, %4
+    %6:vgpr(s32) = G_AMDGPU_ATOMIC_CMPXCHG %5, %3 :: (load store seq_cst 4, addrspace 1)
+    $vgpr0 = COPY %6
+
+...
+
+---
+name:            amdgpu_atomic_cmpxchg_s64_global
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+
+    ; GFX6-LABEL: name: amdgpu_atomic_cmpxchg_s64_global
+    ; GFX6: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX6: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX6: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX6: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX6: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX6: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX6: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX6: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX6: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX6: [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN:%[0-9]+]]:vreg_128 = BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 0, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX6: [[COPY3:%[0-9]+]]:vreg_64 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN]].sub0_sub1
+    ; GFX6: $vgpr0_vgpr1 = COPY [[COPY3]]
+    ; GFX7-LABEL: name: amdgpu_atomic_cmpxchg_s64_global
+    ; GFX7: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX7: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX7: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX7: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX7: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX7: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX7: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX7: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX7: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX7: [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN:%[0-9]+]]:vreg_128 = BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 0, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX7: [[COPY3:%[0-9]+]]:vreg_64 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN]].sub0_sub1
+    ; GFX7: $vgpr0_vgpr1 = COPY [[COPY3]]
+    ; GFX7-FLAT-LABEL: name: amdgpu_atomic_cmpxchg_s64_global
+    ; GFX7-FLAT: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX7-FLAT: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7-FLAT: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX7-FLAT: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX7-FLAT: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX7-FLAT: [[FLAT_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = FLAT_ATOMIC_CMPSWAP_X2_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 8, addrspace 1)
+    ; GFX7-FLAT: $vgpr0_vgpr1 = COPY [[FLAT_ATOMIC_CMPSWAP_X2_RTN]]
+    ; GFX8-LABEL: name: amdgpu_atomic_cmpxchg_s64_global
+    ; GFX8: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX8: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX8: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX8: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX8: [[FLAT_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = FLAT_ATOMIC_CMPSWAP_X2_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 8, addrspace 1)
+    ; GFX8: $vgpr0_vgpr1 = COPY [[FLAT_ATOMIC_CMPSWAP_X2_RTN]]
+    ; GFX9-LABEL: name: amdgpu_atomic_cmpxchg_s64_global
+    ; GFX9: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX9: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX9: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX9: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX9: [[GLOBAL_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = GLOBAL_ATOMIC_CMPSWAP_X2_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX9: $vgpr0_vgpr1 = COPY [[GLOBAL_ATOMIC_CMPSWAP_X2_RTN]]
+    ; GFX10-LABEL: name: amdgpu_atomic_cmpxchg_s64_global
+    ; GFX10: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX10: $vcc_hi = IMPLICIT_DEF
+    ; GFX10: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX10: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX10: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX10: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX10: [[GLOBAL_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = GLOBAL_ATOMIC_CMPSWAP_X2_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX10: $vgpr0_vgpr1 = COPY [[GLOBAL_ATOMIC_CMPSWAP_X2_RTN]]
+    %0:vgpr(p1) = COPY $vgpr0_vgpr1
+    %1:vgpr(s64) = COPY $vgpr2_vgpr3
+    %2:vgpr(s64) = COPY $vgpr4_vgpr5
+    %3:vgpr(<2 x s64>) = G_BUILD_VECTOR %1, %2
+    %4:vgpr(s64) = G_AMDGPU_ATOMIC_CMPXCHG %0, %3 :: (load store seq_cst 8, addrspace 1)
+    $vgpr0_vgpr1 = COPY %4
+
+...
+
+---
+name:            amdgpu_atomic_cmpxchg_s64_global_gep4
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+
+    ; GFX6-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_gep4
+    ; GFX6: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX6: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX6: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX6: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX6: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX6: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX6: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX6: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX6: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX6: [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN:%[0-9]+]]:vreg_128 = BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 4, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX6: [[COPY3:%[0-9]+]]:vreg_64 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN]].sub0_sub1
+    ; GFX6: $vgpr0_vgpr1 = COPY [[COPY3]]
+    ; GFX7-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_gep4
+    ; GFX7: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX7: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX7: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX7: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX7: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX7: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX7: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX7: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX7: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX7: [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN:%[0-9]+]]:vreg_128 = BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 4, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX7: [[COPY3:%[0-9]+]]:vreg_64 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN]].sub0_sub1
+    ; GFX7: $vgpr0_vgpr1 = COPY [[COPY3]]
+    ; GFX7-FLAT-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_gep4
+    ; GFX7-FLAT: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX7-FLAT: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7-FLAT: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX7-FLAT: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX7-FLAT: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX7-FLAT: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 4, implicit $exec
+    ; GFX7-FLAT: [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
+    ; GFX7-FLAT: [[REG_SEQUENCE1:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_MOV_B32_e32_]], %subreg.sub0, [[V_MOV_B32_e32_1]], %subreg.sub1
+    ; GFX7-FLAT: [[COPY3:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub0
+    ; GFX7-FLAT: [[COPY4:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub0
+    ; GFX7-FLAT: [[COPY5:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub1
+    ; GFX7-FLAT: [[COPY6:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub1
+    ; GFX7-FLAT: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64_xexec = V_ADD_I32_e64 [[COPY3]], [[COPY4]], 0, implicit $exec
+    ; GFX7-FLAT: %12:vgpr_32, dead %14:sreg_64_xexec = V_ADDC_U32_e64 [[COPY5]], [[COPY6]], killed [[V_ADD_I32_e64_1]], 0, implicit $exec
+    ; GFX7-FLAT: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_ADD_I32_e64_]], %subreg.sub0, %12, %subreg.sub1
+    ; GFX7-FLAT: [[FLAT_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = FLAT_ATOMIC_CMPSWAP_X2_RTN [[REG_SEQUENCE2]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 8, addrspace 1)
+    ; GFX7-FLAT: $vgpr0_vgpr1 = COPY [[FLAT_ATOMIC_CMPSWAP_X2_RTN]]
+    ; GFX8-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_gep4
+    ; GFX8: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX8: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX8: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX8: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX8: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 4, implicit $exec
+    ; GFX8: [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
+    ; GFX8: [[REG_SEQUENCE1:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_MOV_B32_e32_]], %subreg.sub0, [[V_MOV_B32_e32_1]], %subreg.sub1
+    ; GFX8: [[COPY3:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub0
+    ; GFX8: [[COPY4:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub0
+    ; GFX8: [[COPY5:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub1
+    ; GFX8: [[COPY6:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub1
+    ; GFX8: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64_xexec = V_ADD_I32_e64 [[COPY3]], [[COPY4]], 0, implicit $exec
+    ; GFX8: %12:vgpr_32, dead %14:sreg_64_xexec = V_ADDC_U32_e64 [[COPY5]], [[COPY6]], killed [[V_ADD_I32_e64_1]], 0, implicit $exec
+    ; GFX8: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_ADD_I32_e64_]], %subreg.sub0, %12, %subreg.sub1
+    ; GFX8: [[FLAT_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = FLAT_ATOMIC_CMPSWAP_X2_RTN [[REG_SEQUENCE2]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 8, addrspace 1)
+    ; GFX8: $vgpr0_vgpr1 = COPY [[FLAT_ATOMIC_CMPSWAP_X2_RTN]]
+    ; GFX9-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_gep4
+    ; GFX9: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX9: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX9: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX9: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX9: [[GLOBAL_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = GLOBAL_ATOMIC_CMPSWAP_X2_RTN [[COPY]], [[REG_SEQUENCE]], 4, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX9: $vgpr0_vgpr1 = COPY [[GLOBAL_ATOMIC_CMPSWAP_X2_RTN]]
+    ; GFX10-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_gep4
+    ; GFX10: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX10: $vcc_hi = IMPLICIT_DEF
+    ; GFX10: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX10: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX10: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX10: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX10: [[GLOBAL_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = GLOBAL_ATOMIC_CMPSWAP_X2_RTN [[COPY]], [[REG_SEQUENCE]], 4, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX10: $vgpr0_vgpr1 = COPY [[GLOBAL_ATOMIC_CMPSWAP_X2_RTN]]
+    %0:vgpr(p1) = COPY $vgpr0_vgpr1
+    %1:vgpr(s64) = COPY $vgpr2_vgpr3
+    %2:vgpr(s64) = COPY $vgpr4_vgpr5
+    %3:vgpr(<2 x s64>) = G_BUILD_VECTOR %1, %2
+    %4:vgpr(s64) = G_CONSTANT i64 4
+    %5:vgpr(p1) = G_PTR_ADD %0, %4
+    %6:vgpr(s64) = G_AMDGPU_ATOMIC_CMPXCHG %5, %3 :: (load store seq_cst 8, addrspace 1)
+    $vgpr0_vgpr1 = COPY %6
+
+...
+
+---
+name:            amdgpu_atomic_cmpxchg_s32_global_gepm4
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+
+    ; GFX6-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gepm4
+    ; GFX6: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX6: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX6: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX6: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX6: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX6: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 4294967292, implicit $exec
+    ; GFX6: [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 -1, implicit $exec
+    ; GFX6: [[REG_SEQUENCE1:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_MOV_B32_e32_]], %subreg.sub0, [[V_MOV_B32_e32_1]], %subreg.sub1
+    ; GFX6: [[COPY3:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub0
+    ; GFX6: [[COPY4:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub0
+    ; GFX6: [[COPY5:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub1
+    ; GFX6: [[COPY6:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub1
+    ; GFX6: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64_xexec = V_ADD_I32_e64 [[COPY3]], [[COPY4]], 0, implicit $exec
+    ; GFX6: %18:vgpr_32, dead %20:sreg_64_xexec = V_ADDC_U32_e64 [[COPY5]], [[COPY6]], killed [[V_ADD_I32_e64_1]], 0, implicit $exec
+    ; GFX6: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_ADD_I32_e64_]], %subreg.sub0, %18, %subreg.sub1
+    ; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX6: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX6: [[REG_SEQUENCE3:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX6: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX6: [[REG_SEQUENCE4:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE3]], %subreg.sub2_sub3
+    ; GFX6: [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN [[REG_SEQUENCE]], [[REG_SEQUENCE2]], [[REG_SEQUENCE4]], 0, 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX6: [[COPY7:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN]].sub0
+    ; GFX6: $vgpr0 = COPY [[COPY7]]
+    ; GFX7-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gepm4
+    ; GFX7: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX7: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 4294967292, implicit $exec
+    ; GFX7: [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 -1, implicit $exec
+    ; GFX7: [[REG_SEQUENCE1:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_MOV_B32_e32_]], %subreg.sub0, [[V_MOV_B32_e32_1]], %subreg.sub1
+    ; GFX7: [[COPY3:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub0
+    ; GFX7: [[COPY4:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub0
+    ; GFX7: [[COPY5:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub1
+    ; GFX7: [[COPY6:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub1
+    ; GFX7: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64_xexec = V_ADD_I32_e64 [[COPY3]], [[COPY4]], 0, implicit $exec
+    ; GFX7: %18:vgpr_32, dead %20:sreg_64_xexec = V_ADDC_U32_e64 [[COPY5]], [[COPY6]], killed [[V_ADD_I32_e64_1]], 0, implicit $exec
+    ; GFX7: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_ADD_I32_e64_]], %subreg.sub0, %18, %subreg.sub1
+    ; GFX7: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX7: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX7: [[REG_SEQUENCE3:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX7: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX7: [[REG_SEQUENCE4:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE3]], %subreg.sub2_sub3
+    ; GFX7: [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN [[REG_SEQUENCE]], [[REG_SEQUENCE2]], [[REG_SEQUENCE4]], 0, 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX7: [[COPY7:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN]].sub0
+    ; GFX7: $vgpr0 = COPY [[COPY7]]
+    ; GFX7-FLAT-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gepm4
+    ; GFX7-FLAT: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX7-FLAT: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7-FLAT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7-FLAT: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7-FLAT: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7-FLAT: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 4294967292, implicit $exec
+    ; GFX7-FLAT: [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 -1, implicit $exec
+    ; GFX7-FLAT: [[REG_SEQUENCE1:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_MOV_B32_e32_]], %subreg.sub0, [[V_MOV_B32_e32_1]], %subreg.sub1
+    ; GFX7-FLAT: [[COPY3:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub0
+    ; GFX7-FLAT: [[COPY4:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub0
+    ; GFX7-FLAT: [[COPY5:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub1
+    ; GFX7-FLAT: [[COPY6:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub1
+    ; GFX7-FLAT: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64_xexec = V_ADD_I32_e64 [[COPY3]], [[COPY4]], 0, implicit $exec
+    ; GFX7-FLAT: %12:vgpr_32, dead %14:sreg_64_xexec = V_ADDC_U32_e64 [[COPY5]], [[COPY6]], killed [[V_ADD_I32_e64_1]], 0, implicit $exec
+    ; GFX7-FLAT: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_ADD_I32_e64_]], %subreg.sub0, %12, %subreg.sub1
+    ; GFX7-FLAT: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[REG_SEQUENCE2]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX7-FLAT: $vgpr0 = COPY [[FLAT_ATOMIC_CMPSWAP_RTN]]
+    ; GFX8-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gepm4
+    ; GFX8: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX8: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX8: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX8: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX8: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 4294967292, implicit $exec
+    ; GFX8: [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 -1, implicit $exec
+    ; GFX8: [[REG_SEQUENCE1:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_MOV_B32_e32_]], %subreg.sub0, [[V_MOV_B32_e32_1]], %subreg.sub1
+    ; GFX8: [[COPY3:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub0
+    ; GFX8: [[COPY4:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub0
+    ; GFX8: [[COPY5:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub1
+    ; GFX8: [[COPY6:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub1
+    ; GFX8: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64_xexec = V_ADD_I32_e64 [[COPY3]], [[COPY4]], 0, implicit $exec
+    ; GFX8: %12:vgpr_32, dead %14:sreg_64_xexec = V_ADDC_U32_e64 [[COPY5]], [[COPY6]], killed [[V_ADD_I32_e64_1]], 0, implicit $exec
+    ; GFX8: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[V_ADD_I32_e64_]], %subreg.sub0, %12, %subreg.sub1
+    ; GFX8: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[REG_SEQUENCE2]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX8: $vgpr0 = COPY [[FLAT_ATOMIC_CMPSWAP_RTN]]
+    ; GFX9-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gepm4
+    ; GFX9: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX9: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX9: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX9: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX9: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], -4, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX9: $vgpr0 = COPY [[GLOBAL_ATOMIC_CMPSWAP_RTN]]
+    ; GFX10-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_gepm4
+    ; GFX10: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX10: $vcc_hi = IMPLICIT_DEF
+    ; GFX10: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX10: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX10: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX10: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX10: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], -4, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX10: $vgpr0 = COPY [[GLOBAL_ATOMIC_CMPSWAP_RTN]]
+    %0:vgpr(p1) = COPY $vgpr0_vgpr1
+    %1:vgpr(s32) = COPY $vgpr2
+    %2:vgpr(s32) = COPY $vgpr3
+    %3:vgpr(<2 x s32>) = G_BUILD_VECTOR %1, %2
+    %4:vgpr(s64) = G_CONSTANT i64 -4
+    %5:vgpr(p1) = G_PTR_ADD %0, %4
+    %6:vgpr(s32) = G_AMDGPU_ATOMIC_CMPXCHG %5, %3 :: (load store seq_cst 4, addrspace 1)
+    $vgpr0 = COPY %6
+
+...
+
+---
+name:            amdgpu_atomic_cmpxchg_s32_global_nortn
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+
+    ; GFX6-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_nortn
+    ; GFX6: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX6: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX6: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX6: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX6: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX6: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX6: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX6: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX6: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX6: [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX6: [[COPY3:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN]].sub0
+    ; GFX7-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_nortn
+    ; GFX7: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX7: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX7: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX7: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX7: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX7: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX7: [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX7: [[COPY3:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_ADDR64_RTN]].sub0
+    ; GFX7-FLAT-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_nortn
+    ; GFX7-FLAT: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX7-FLAT: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7-FLAT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7-FLAT: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7-FLAT: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7-FLAT: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX8-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_nortn
+    ; GFX8: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX8: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX8: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX8: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX8: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX9-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_nortn
+    ; GFX9: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX9: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX9: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX9: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX9: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX10-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_nortn
+    ; GFX10: liveins: $vgpr0_vgpr1, $vgpr2, $vgpr3
+    ; GFX10: $vcc_hi = IMPLICIT_DEF
+    ; GFX10: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX10: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX10: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX10: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX10: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    %0:vgpr(p1) = COPY $vgpr0_vgpr1
+    %1:vgpr(s32) = COPY $vgpr2
+    %2:vgpr(s32) = COPY $vgpr3
+    %3:vgpr(<2 x s32>) = G_BUILD_VECTOR %1, %2
+    %4:vgpr(s32) = G_AMDGPU_ATOMIC_CMPXCHG %0, %3 :: (load store seq_cst 4, addrspace 1)
+
+...
+
+---
+name:            amdgpu_atomic_cmpxchg_s64_global_nortn
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+
+    ; GFX6-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_nortn
+    ; GFX6: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX6: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX6: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX6: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX6: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX6: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX6: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX6: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX6: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX6: [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN:%[0-9]+]]:vreg_128 = BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 0, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX6: [[COPY3:%[0-9]+]]:vreg_64 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN]].sub0_sub1
+    ; GFX7-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_nortn
+    ; GFX7: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX7: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX7: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX7: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX7: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX7: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX7: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX7: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
+    ; GFX7: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[S_MOV_B64_]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX7: [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN:%[0-9]+]]:vreg_128 = BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN [[REG_SEQUENCE]], [[COPY]], [[REG_SEQUENCE2]], 0, 0, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX7: [[COPY3:%[0-9]+]]:vreg_64 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_X2_ADDR64_RTN]].sub0_sub1
+    ; GFX7-FLAT-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_nortn
+    ; GFX7-FLAT: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX7-FLAT: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX7-FLAT: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX7-FLAT: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX7-FLAT: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX7-FLAT: [[FLAT_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = FLAT_ATOMIC_CMPSWAP_X2_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 8, addrspace 1)
+    ; GFX8-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_nortn
+    ; GFX8: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX8: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX8: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX8: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX8: [[FLAT_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = FLAT_ATOMIC_CMPSWAP_X2_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 8, addrspace 1)
+    ; GFX9-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_nortn
+    ; GFX9: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX9: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX9: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX9: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX9: [[GLOBAL_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = GLOBAL_ATOMIC_CMPSWAP_X2_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    ; GFX10-LABEL: name: amdgpu_atomic_cmpxchg_s64_global_nortn
+    ; GFX10: liveins: $vgpr0_vgpr1, $vgpr2_vgpr3, $vgpr4_vgpr5
+    ; GFX10: $vcc_hi = IMPLICIT_DEF
+    ; GFX10: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
+    ; GFX10: [[COPY1:%[0-9]+]]:vreg_64 = COPY $vgpr2_vgpr3
+    ; GFX10: [[COPY2:%[0-9]+]]:vreg_64 = COPY $vgpr4_vgpr5
+    ; GFX10: [[REG_SEQUENCE:%[0-9]+]]:vreg_128 = REG_SEQUENCE [[COPY1]], %subreg.sub0_sub1, [[COPY2]], %subreg.sub2_sub3
+    ; GFX10: [[GLOBAL_ATOMIC_CMPSWAP_X2_RTN:%[0-9]+]]:vreg_64 = GLOBAL_ATOMIC_CMPSWAP_X2_RTN [[COPY]], [[REG_SEQUENCE]], 0, 0, implicit $exec :: (load store seq_cst 8, addrspace 1)
+    %0:vgpr(p1) = COPY $vgpr0_vgpr1
+    %1:vgpr(s64) = COPY $vgpr2_vgpr3
+    %2:vgpr(s64) = COPY $vgpr4_vgpr5
+    %3:vgpr(<2 x s64>) = G_BUILD_VECTOR %1, %2
+    %4:vgpr(s64) = G_AMDGPU_ATOMIC_CMPXCHG %0, %3 :: (load store seq_cst 8, addrspace 1)
+
+...
+
+---
+name:            amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+
+    ; GFX6-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr
+    ; GFX6: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX6: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX6: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX6: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX6: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 4294967295
+    ; GFX6: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX6: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX6: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX6: [[BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN [[REG_SEQUENCE]], [[REG_SEQUENCE2]], 0, 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX6: [[COPY3:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN]].sub0
+    ; GFX6: $vgpr0 = COPY [[COPY3]]
+    ; GFX7-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr
+    ; GFX7: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX7: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX7: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 4294967295
+    ; GFX7: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX7: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX7: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX7: [[BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN [[REG_SEQUENCE]], [[REG_SEQUENCE2]], 0, 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX7: [[COPY3:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN]].sub0
+    ; GFX7: $vgpr0 = COPY [[COPY3]]
+    ; GFX7-FLAT-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr
+    ; GFX7-FLAT: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX7-FLAT: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX7-FLAT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7-FLAT: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7-FLAT: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7-FLAT: [[COPY3:%[0-9]+]]:vreg_64 = COPY [[COPY]]
+    ; GFX7-FLAT: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[COPY3]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX7-FLAT: $vgpr0 = COPY [[FLAT_ATOMIC_CMPSWAP_RTN]]
+    ; GFX8-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr
+    ; GFX8: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX8: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX8: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX8: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX8: [[COPY3:%[0-9]+]]:vreg_64 = COPY [[COPY]]
+    ; GFX8: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[COPY3]], [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX8: $vgpr0 = COPY [[FLAT_ATOMIC_CMPSWAP_RTN]]
+    ; GFX9-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr
+    ; GFX9: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX9: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX9: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX9: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX9: [[COPY3:%[0-9]+]]:vreg_64 = COPY [[COPY]]
+    ; GFX9: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY3]], [[REG_SEQUENCE]], 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX9: $vgpr0 = COPY [[GLOBAL_ATOMIC_CMPSWAP_RTN]]
+    ; GFX10-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr
+    ; GFX10: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX10: $vcc_hi = IMPLICIT_DEF
+    ; GFX10: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX10: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX10: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX10: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX10: [[COPY3:%[0-9]+]]:vreg_64 = COPY [[COPY]]
+    ; GFX10: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY3]], [[REG_SEQUENCE]], 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX10: $vgpr0 = COPY [[GLOBAL_ATOMIC_CMPSWAP_RTN]]
+    %0:sgpr(p1) = COPY $sgpr0_sgpr1
+    %1:vgpr(s32) = COPY $vgpr2
+    %2:vgpr(s32) = COPY $vgpr3
+    %3:vgpr(<2 x s32>) = G_BUILD_VECTOR %1, %2
+    %4:vgpr(s32) = G_AMDGPU_ATOMIC_CMPXCHG %0, %3 :: (load store seq_cst 4, addrspace 1)
+    $vgpr0 = COPY %4
+
+...
+
+---
+name:            amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr_offset_4095
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+
+    ; GFX6-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr_offset_4095
+    ; GFX6: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX6: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX6: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX6: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX6: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 4294967295
+    ; GFX6: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX6: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX6: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX6: [[BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN [[REG_SEQUENCE]], [[REG_SEQUENCE2]], 0, 4095, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX6: [[COPY3:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN]].sub0
+    ; GFX6: $vgpr0 = COPY [[COPY3]]
+    ; GFX7-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr_offset_4095
+    ; GFX7: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX7: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX7: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 4294967295
+    ; GFX7: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 61440
+    ; GFX7: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX7: [[REG_SEQUENCE2:%[0-9]+]]:sgpr_128 = REG_SEQUENCE [[COPY]], %subreg.sub0_sub1, [[REG_SEQUENCE1]], %subreg.sub2_sub3
+    ; GFX7: [[BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN:%[0-9]+]]:vreg_64 = BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN [[REG_SEQUENCE]], [[REG_SEQUENCE2]], 0, 4095, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX7: [[COPY3:%[0-9]+]]:vgpr_32 = COPY killed [[BUFFER_ATOMIC_CMPSWAP_OFFSET_RTN]].sub0
+    ; GFX7: $vgpr0 = COPY [[COPY3]]
+    ; GFX7-FLAT-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr_offset_4095
+    ; GFX7-FLAT: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX7-FLAT: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX7-FLAT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX7-FLAT: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX7-FLAT: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 4095
+    ; GFX7-FLAT: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX7-FLAT: [[REG_SEQUENCE:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX7-FLAT: [[COPY3:%[0-9]+]]:sreg_32 = COPY [[COPY]].sub0
+    ; GFX7-FLAT: [[COPY4:%[0-9]+]]:sreg_32 = COPY [[REG_SEQUENCE]].sub0
+    ; GFX7-FLAT: [[COPY5:%[0-9]+]]:sreg_32 = COPY [[COPY]].sub1
+    ; GFX7-FLAT: [[COPY6:%[0-9]+]]:sreg_32 = COPY [[REG_SEQUENCE]].sub1
+    ; GFX7-FLAT: [[S_ADD_U32_:%[0-9]+]]:sreg_32 = S_ADD_U32 [[COPY3]], [[COPY4]], implicit-def $scc
+    ; GFX7-FLAT: [[S_ADDC_U32_:%[0-9]+]]:sreg_32 = S_ADDC_U32 [[COPY5]], [[COPY6]], implicit-def $scc, implicit $scc
+    ; GFX7-FLAT: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64_xexec = REG_SEQUENCE [[S_ADD_U32_]], %subreg.sub0, [[S_ADDC_U32_]], %subreg.sub1
+    ; GFX7-FLAT: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX7-FLAT: [[COPY7:%[0-9]+]]:vreg_64 = COPY [[REG_SEQUENCE1]]
+    ; GFX7-FLAT: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[COPY7]], [[REG_SEQUENCE2]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX7-FLAT: $vgpr0 = COPY [[FLAT_ATOMIC_CMPSWAP_RTN]]
+    ; GFX8-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr_offset_4095
+    ; GFX8: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX8: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX8: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX8: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 4095
+    ; GFX8: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX8: [[REG_SEQUENCE:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX8: [[COPY3:%[0-9]+]]:sreg_32 = COPY [[COPY]].sub0
+    ; GFX8: [[COPY4:%[0-9]+]]:sreg_32 = COPY [[REG_SEQUENCE]].sub0
+    ; GFX8: [[COPY5:%[0-9]+]]:sreg_32 = COPY [[COPY]].sub1
+    ; GFX8: [[COPY6:%[0-9]+]]:sreg_32 = COPY [[REG_SEQUENCE]].sub1
+    ; GFX8: [[S_ADD_U32_:%[0-9]+]]:sreg_32 = S_ADD_U32 [[COPY3]], [[COPY4]], implicit-def $scc
+    ; GFX8: [[S_ADDC_U32_:%[0-9]+]]:sreg_32 = S_ADDC_U32 [[COPY5]], [[COPY6]], implicit-def $scc, implicit $scc
+    ; GFX8: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64_xexec = REG_SEQUENCE [[S_ADD_U32_]], %subreg.sub0, [[S_ADDC_U32_]], %subreg.sub1
+    ; GFX8: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX8: [[COPY7:%[0-9]+]]:vreg_64 = COPY [[REG_SEQUENCE1]]
+    ; GFX8: [[FLAT_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = FLAT_ATOMIC_CMPSWAP_RTN [[COPY7]], [[REG_SEQUENCE2]], 0, 0, implicit $exec, implicit $flat_scr :: (load store seq_cst 4, addrspace 1)
+    ; GFX8: $vgpr0 = COPY [[FLAT_ATOMIC_CMPSWAP_RTN]]
+    ; GFX9-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr_offset_4095
+    ; GFX9: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX9: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX9: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX9: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX9: [[COPY3:%[0-9]+]]:vreg_64 = COPY [[COPY]]
+    ; GFX9: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY3]], [[REG_SEQUENCE]], 4095, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX9: $vgpr0 = COPY [[GLOBAL_ATOMIC_CMPSWAP_RTN]]
+    ; GFX10-LABEL: name: amdgpu_atomic_cmpxchg_s32_global_sgpr_ptr_offset_4095
+    ; GFX10: liveins: $sgpr0_sgpr1, $vgpr2, $vgpr3
+    ; GFX10: $vcc_hi = IMPLICIT_DEF
+    ; GFX10: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; GFX10: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr2
+    ; GFX10: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr3
+    ; GFX10: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 4095
+    ; GFX10: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 0
+    ; GFX10: [[REG_SEQUENCE:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[S_MOV_B32_]], %subreg.sub0, [[S_MOV_B32_1]], %subreg.sub1
+    ; GFX10: [[COPY3:%[0-9]+]]:sreg_32 = COPY [[COPY]].sub0
+    ; GFX10: [[COPY4:%[0-9]+]]:sreg_32 = COPY [[REG_SEQUENCE]].sub0
+    ; GFX10: [[COPY5:%[0-9]+]]:sreg_32 = COPY [[COPY]].sub1
+    ; GFX10: [[COPY6:%[0-9]+]]:sreg_32 = COPY [[REG_SEQUENCE]].sub1
+    ; GFX10: [[S_ADD_U32_:%[0-9]+]]:sreg_32 = S_ADD_U32 [[COPY3]], [[COPY4]], implicit-def $scc
+    ; GFX10: [[S_ADDC_U32_:%[0-9]+]]:sreg_32 = S_ADDC_U32 [[COPY5]], [[COPY6]], implicit-def $scc, implicit $scc
+    ; GFX10: [[REG_SEQUENCE1:%[0-9]+]]:sreg_64_xexec = REG_SEQUENCE [[S_ADD_U32_]], %subreg.sub0, [[S_ADDC_U32_]], %subreg.sub1
+    ; GFX10: [[REG_SEQUENCE2:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY2]], %subreg.sub1
+    ; GFX10: [[COPY7:%[0-9]+]]:vreg_64 = COPY [[REG_SEQUENCE1]]
+    ; GFX10: [[GLOBAL_ATOMIC_CMPSWAP_RTN:%[0-9]+]]:vgpr_32 = GLOBAL_ATOMIC_CMPSWAP_RTN [[COPY7]], [[REG_SEQUENCE2]], 0, 0, implicit $exec :: (load store seq_cst 4, addrspace 1)
+    ; GFX10: $vgpr0 = COPY [[GLOBAL_ATOMIC_CMPSWAP_RTN]]
+    %0:sgpr(p1) = COPY $sgpr0_sgpr1
+    %1:vgpr(s32) = COPY $vgpr2
+    %2:vgpr(s32) = COPY $vgpr3
+    %3:sgpr(s64) = G_CONSTANT i64 4095
+    %4:sgpr(p1) = G_PTR_ADD %0, %3
+    %5:vgpr(<2 x s32>) = G_BUILD_VECTOR %1, %2
+    %6:vgpr(s32) = G_AMDGPU_ATOMIC_CMPXCHG %4, %5 :: (load store seq_cst 4, addrspace 1)
+    $vgpr0 = COPY %6
+
+...
Index: llvm/test/CodeGen/AMDGPU/GlobalISel/mubuf-global.ll
===================================================================
--- llvm/test/CodeGen/AMDGPU/GlobalISel/mubuf-global.ll
+++ llvm/test/CodeGen/AMDGPU/GlobalISel/mubuf-global.ll
@@ -1099,3 +1099,197 @@
   %cast = bitcast i32 %result to float
   ret float %cast
 }
+
+define amdgpu_ps float @mubuf_cmpxchg_sgpr_ptr_offset4095(i32 addrspace(1)* inreg %ptr, i32 %old, i32 %in) {
+; GFX6-LABEL: mubuf_cmpxchg_sgpr_ptr_offset4095:
+; GFX6:       ; %bb.0:
+; GFX6-NEXT:    s_mov_b32 s0, s2
+; GFX6-NEXT:    s_mov_b32 s1, s3
+; GFX6-NEXT:    v_mov_b32_e32 v2, v0
+; GFX6-NEXT:    s_mov_b32 s2, -1
+; GFX6-NEXT:    s_mov_b32 s3, 0xf000
+; GFX6-NEXT:    s_movk_i32 s4, 0x3ffc
+; GFX6-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT:    buffer_atomic_cmpswap v[1:2], off, s[0:3], s4 glc
+; GFX6-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT:    buffer_wbinvl1
+; GFX6-NEXT:    v_mov_b32_e32 v0, v1
+; GFX6-NEXT:    s_waitcnt expcnt(0)
+; GFX6-NEXT:    ; return to shader part epilog
+;
+; GFX7-LABEL: mubuf_cmpxchg_sgpr_ptr_offset4095:
+; GFX7:       ; %bb.0:
+; GFX7-NEXT:    s_mov_b32 s0, s2
+; GFX7-NEXT:    s_mov_b32 s1, s3
+; GFX7-NEXT:    v_mov_b32_e32 v2, v0
+; GFX7-NEXT:    s_mov_b32 s2, -1
+; GFX7-NEXT:    s_mov_b32 s3, 0xf000
+; GFX7-NEXT:    s_movk_i32 s4, 0x3ffc
+; GFX7-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT:    buffer_atomic_cmpswap v[1:2], off, s[0:3], s4 glc
+; GFX7-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT:    buffer_wbinvl1
+; GFX7-NEXT:    v_mov_b32_e32 v0, v1
+; GFX7-NEXT:    ; return to shader part epilog
+  %gep = getelementptr i32, i32 addrspace(1)* %ptr, i64 4095
+  %result.struct = cmpxchg i32 addrspace(1)* %gep, i32 %old, i32 %in seq_cst seq_cst
+  %result = extractvalue { i32, i1 } %result.struct, 0
+  %cast = bitcast i32 %result to float
+  ret float %cast
+}
+
+define amdgpu_ps float @mubuf_cmpxchg_sgpr_ptr_offset4294967296(i32 addrspace(1)* inreg %ptr, i32 %old, i32 %in) {
+; GFX6-LABEL: mubuf_cmpxchg_sgpr_ptr_offset4294967296:
+; GFX6:       ; %bb.0:
+; GFX6-NEXT:    s_mov_b32 s4, 0
+; GFX6-NEXT:    s_mov_b32 s5, 4
+; GFX6-NEXT:    v_mov_b32_e32 v3, s4
+; GFX6-NEXT:    s_mov_b32 s0, s2
+; GFX6-NEXT:    s_mov_b32 s1, s3
+; GFX6-NEXT:    v_mov_b32_e32 v2, v0
+; GFX6-NEXT:    s_mov_b32 s3, 0xf000
+; GFX6-NEXT:    s_mov_b32 s2, s4
+; GFX6-NEXT:    v_mov_b32_e32 v4, s5
+; GFX6-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT:    buffer_atomic_cmpswap v[1:2], v[3:4], s[0:3], 0 addr64 glc
+; GFX6-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT:    buffer_wbinvl1
+; GFX6-NEXT:    v_mov_b32_e32 v0, v1
+; GFX6-NEXT:    s_waitcnt expcnt(0)
+; GFX6-NEXT:    ; return to shader part epilog
+;
+; GFX7-LABEL: mubuf_cmpxchg_sgpr_ptr_offset4294967296:
+; GFX7:       ; %bb.0:
+; GFX7-NEXT:    s_mov_b32 s4, 0
+; GFX7-NEXT:    s_mov_b32 s5, 4
+; GFX7-NEXT:    v_mov_b32_e32 v3, s4
+; GFX7-NEXT:    s_mov_b32 s0, s2
+; GFX7-NEXT:    s_mov_b32 s1, s3
+; GFX7-NEXT:    v_mov_b32_e32 v2, v0
+; GFX7-NEXT:    s_mov_b32 s3, 0xf000
+; GFX7-NEXT:    s_mov_b32 s2, s4
+; GFX7-NEXT:    v_mov_b32_e32 v4, s5
+; GFX7-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT:    buffer_atomic_cmpswap v[1:2], v[3:4], s[0:3], 0 addr64 glc
+; GFX7-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT:    buffer_wbinvl1
+; GFX7-NEXT:    v_mov_b32_e32 v0, v1
+; GFX7-NEXT:    ; return to shader part epilog
+  %gep = getelementptr i32, i32 addrspace(1)* %ptr, i64 4294967296
+  %result.struct = cmpxchg i32 addrspace(1)* %gep, i32 %old, i32 %in seq_cst seq_cst
+  %result = extractvalue { i32, i1 } %result.struct, 0
+  %cast = bitcast i32 %result to float
+  ret float %cast
+}
+
+define amdgpu_ps float @mubuf_cmpxchg_vgpr_ptr_offset4095(i32 addrspace(1)* %ptr, i32 %old, i32 %in) {
+; GFX6-LABEL: mubuf_cmpxchg_vgpr_ptr_offset4095:
+; GFX6:       ; %bb.0:
+; GFX6-NEXT:    v_mov_b32_e32 v4, v2
+; GFX6-NEXT:    s_mov_b32 s2, 0
+; GFX6-NEXT:    s_mov_b32 s3, 0xf000
+; GFX6-NEXT:    s_mov_b64 s[0:1], 0
+; GFX6-NEXT:    s_movk_i32 s4, 0x3ffc
+; GFX6-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT:    buffer_atomic_cmpswap v[3:4], v[0:1], s[0:3], s4 addr64 glc
+; GFX6-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT:    buffer_wbinvl1
+; GFX6-NEXT:    v_mov_b32_e32 v0, v3
+; GFX6-NEXT:    s_waitcnt expcnt(0)
+; GFX6-NEXT:    ; return to shader part epilog
+;
+; GFX7-LABEL: mubuf_cmpxchg_vgpr_ptr_offset4095:
+; GFX7:       ; %bb.0:
+; GFX7-NEXT:    v_mov_b32_e32 v4, v2
+; GFX7-NEXT:    s_mov_b32 s2, 0
+; GFX7-NEXT:    s_mov_b32 s3, 0xf000
+; GFX7-NEXT:    s_mov_b64 s[0:1], 0
+; GFX7-NEXT:    s_movk_i32 s4, 0x3ffc
+; GFX7-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT:    buffer_atomic_cmpswap v[3:4], v[0:1], s[0:3], s4 addr64 glc
+; GFX7-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT:    buffer_wbinvl1
+; GFX7-NEXT:    v_mov_b32_e32 v0, v3
+; GFX7-NEXT:    ; return to shader part epilog
+  %gep = getelementptr i32, i32 addrspace(1)* %ptr, i64 4095
+  %result.struct = cmpxchg i32 addrspace(1)* %gep, i32 %old, i32 %in seq_cst seq_cst
+  %result = extractvalue { i32, i1 } %result.struct, 0
+  %cast = bitcast i32 %result to float
+  ret float %cast
+}
+
+define amdgpu_ps float @mubuf_cmpxchg_vgpr_ptr_offset4294967296(i32 addrspace(1)* %ptr, i32 %old, i32 %in) {
+; GFX6-LABEL: mubuf_cmpxchg_vgpr_ptr_offset4294967296:
+; GFX6:       ; %bb.0:
+; GFX6-NEXT:    s_mov_b32 s0, 0
+; GFX6-NEXT:    v_mov_b32_e32 v4, v2
+; GFX6-NEXT:    s_mov_b32 s1, 4
+; GFX6-NEXT:    s_mov_b32 s3, 0xf000
+; GFX6-NEXT:    s_mov_b32 s2, s0
+; GFX6-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT:    buffer_atomic_cmpswap v[3:4], v[0:1], s[0:3], 0 addr64 glc
+; GFX6-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT:    buffer_wbinvl1
+; GFX6-NEXT:    v_mov_b32_e32 v0, v3
+; GFX6-NEXT:    s_waitcnt expcnt(0)
+; GFX6-NEXT:    ; return to shader part epilog
+;
+; GFX7-LABEL: mubuf_cmpxchg_vgpr_ptr_offset4294967296:
+; GFX7:       ; %bb.0:
+; GFX7-NEXT:    s_mov_b32 s0, 0
+; GFX7-NEXT:    v_mov_b32_e32 v4, v2
+; GFX7-NEXT:    s_mov_b32 s1, 4
+; GFX7-NEXT:    s_mov_b32 s3, 0xf000
+; GFX7-NEXT:    s_mov_b32 s2, s0
+; GFX7-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT:    buffer_atomic_cmpswap v[3:4], v[0:1], s[0:3], 0 addr64 glc
+; GFX7-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT:    buffer_wbinvl1
+; GFX7-NEXT:    v_mov_b32_e32 v0, v3
+; GFX7-NEXT:    ; return to shader part epilog
+  %gep = getelementptr i32, i32 addrspace(1)* %ptr, i64 4294967296
+  %result.struct = cmpxchg i32 addrspace(1)* %gep, i32 %old, i32 %in seq_cst seq_cst
+  %result = extractvalue { i32, i1 } %result.struct, 0
+  %cast = bitcast i32 %result to float
+  ret float %cast
+}
+
+define amdgpu_ps float @mubuf_cmpxchg_sgpr_ptr_vgpr_offset(i32 addrspace(1)* inreg %ptr, i32 %voffset, i32 %old, i32 %in) {
+; GFX6-LABEL: mubuf_cmpxchg_sgpr_ptr_vgpr_offset:
+; GFX6:       ; %bb.0:
+; GFX6-NEXT:    v_mov_b32_e32 v3, v1
+; GFX6-NEXT:    v_ashrrev_i32_e32 v1, 31, v0
+; GFX6-NEXT:    v_lshl_b64 v[0:1], v[0:1], 2
+; GFX6-NEXT:    s_mov_b32 s0, s2
+; GFX6-NEXT:    s_mov_b32 s1, s3
+; GFX6-NEXT:    s_mov_b32 s2, 0
+; GFX6-NEXT:    s_mov_b32 s3, 0xf000
+; GFX6-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT:    buffer_atomic_cmpswap v[2:3], v[0:1], s[0:3], 0 addr64 glc
+; GFX6-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT:    buffer_wbinvl1
+; GFX6-NEXT:    v_mov_b32_e32 v0, v2
+; GFX6-NEXT:    s_waitcnt expcnt(0)
+; GFX6-NEXT:    ; return to shader part epilog
+;
+; GFX7-LABEL: mubuf_cmpxchg_sgpr_ptr_vgpr_offset:
+; GFX7:       ; %bb.0:
+; GFX7-NEXT:    v_mov_b32_e32 v3, v1
+; GFX7-NEXT:    v_ashrrev_i32_e32 v1, 31, v0
+; GFX7-NEXT:    v_lshl_b64 v[0:1], v[0:1], 2
+; GFX7-NEXT:    s_mov_b32 s0, s2
+; GFX7-NEXT:    s_mov_b32 s1, s3
+; GFX7-NEXT:    s_mov_b32 s2, 0
+; GFX7-NEXT:    s_mov_b32 s3, 0xf000
+; GFX7-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT:    buffer_atomic_cmpswap v[2:3], v[0:1], s[0:3], 0 addr64 glc
+; GFX7-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT:    buffer_wbinvl1
+; GFX7-NEXT:    v_mov_b32_e32 v0, v2
+; GFX7-NEXT:    ; return to shader part epilog
+  %gep = getelementptr i32, i32 addrspace(1)* %ptr, i32 %voffset
+  %result.struct = cmpxchg i32 addrspace(1)* %gep, i32 %old, i32 %in seq_cst seq_cst
+  %result = extractvalue { i32, i1 } %result.struct, 0
+  %cast = bitcast i32 %result to float
+  ret float %cast
+}