[AMDGPU] Add llvm.amdgcn.wqm.demote intrinsic

[critson]

Summary

Add intrinsic which demotes all active lanes to helper lanes.
This is used to implement demote to helper Vulkan extension.

In practice demoting a lane to helper simply means removing it
from the mask of live lanes used for WQM/WWM/Exact mode.
Where the shader does not use WQM, demotes just become kills.

Additionally add llvm.amdgcn.live.mask intrinsic to complement
demote operations. In theory llvm.amdgcn.ps.live can be used
to detect helper lanes; however, ps.live can be moved by LICM.
The movement of ps.live cannot be remedied without changing
its type signature and such a change would require ps.live
users to update as well.

[foad]

llvm/lib/Target/AMDGPU/SIInstructions.td

387

Doesn't really matter but you can end the line with a ; instead of {}.

llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp

817–824

Please put the isDemote case first. Negated conditions with "else"s make my head hurt.

[critson]

llvm/lib/Target/AMDGPU/SIInstructions.td

387

A legacy of when this had some flags.

[critson]

• Address reviewer comments.

[critson]

• Resync with parent patch.
• Fix a bug where demotes did not block if simplification in control flow lowering.

[arsenm]

llvm/include/llvm/IR/IntrinsicsAMDGPU.td

1357–1361

Should ps_live eventually be replaced? I would rather make that clear rather than adding another intrinsic to void updating users

[foad]

Looks reasonable to me.

[piotr]

LGTM with a few nits - feel free to ignore them.

llvm/include/llvm/IR/IntrinsicsAMDGPU.td

1352

Mark as deprecated?

1357

If the old ps_live is slated to go away, it would be better to not refer to it here.

llvm/lib/Target/AMDGPU/SILowerControlFlow.cpp

727

You can avoid calling .contains() by adding a local variable in the outer "for" loop (or slightly refactoring the first inner loop and testing the iterator).

[critson]

• Address review comments
• Mark ps.live as deprecated.

llvm/include/llvm/IR/IntrinsicsAMDGPU.td

def int_amdgcn_interp_p2_f16 :
   GCCBuiltin<"__builtin_amdgcn_interp_p2_f16">,
   Intrinsic<[llvm_half_ty],
             [llvm_float_ty, llvm_float_ty, llvm_i32_ty, llvm_i32_ty, llvm_i1_ty, llvm_i32_ty],
             [IntrNoMem, IntrSpeculatable, IntrWillReturn,
              ImmArg<ArgIndex<2>>, ImmArg<ArgIndex<3>>, ImmArg<ArgIndex<4>>]>;
 
 // Pixel shaders only: whether the current pixel is live (i.e. not a helper
 // invocation for derivative computation).
 def int_amdgcn_ps_live : Intrinsic <
   [llvm_i1_ty],
   [],
   [IntrNoMem, IntrWillReturn]>;
 
+// Similar to int_amdgcn_ps_live, but cannot be moved by LICM.
+// Returns true if lane is not a helper.
+def int_amdgcn_live_mask : Intrinsic <[llvm_i1_ty],
+  [], [IntrReadMem, IntrInaccessibleMemOnly]
+>;
+
 def int_amdgcn_mbcnt_lo :
   GCCBuiltin<"__builtin_amdgcn_mbcnt_lo">,
   Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty],
    [IntrNoMem, IntrWillReturn]>;
 
 def int_amdgcn_mbcnt_hi :
   GCCBuiltin<"__builtin_amdgcn_mbcnt_hi">,
   Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty],

 // If false, set EXEC=0 for the current thread until the end of program.
 // FIXME: Should this be IntrNoMem, IntrHasSideEffects, or IntrWillReturn?
 def int_amdgcn_kill : Intrinsic<[], [llvm_i1_ty], []>;
 
 def int_amdgcn_endpgm : GCCBuiltin<"__builtin_amdgcn_endpgm">,
   Intrinsic<[], [], [IntrNoReturn, IntrCold, IntrNoMem, IntrHasSideEffects]
 >;
 
+// If false, mark all active lanes as helper lanes until the end of program.
+def int_amdgcn_wqm_demote : Intrinsic<[],
+  [llvm_i1_ty], [IntrWriteMem, IntrInaccessibleMemOnly]
+>;
+
 // Copies the active channels of the source value to the destination value,
 // with the guarantee that the source value is computed as if the entire
 // program were executed in Whole Wavefront Mode, i.e. with all channels
 // enabled, with a few exceptions: - Phi nodes with require WWM return an
 // undefined value.
 def int_amdgcn_wwm : Intrinsic<[llvm_any_ty],
   [LLVMMatchType<0>], [IntrNoMem, IntrSpeculatable,
                        IntrConvergent, IntrWillReturn]

llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp

case AMDGPU::G_INTRINSIC_W_SIDE_EFFECTS: {
     }
     case Intrinsic::amdgcn_else: {
       unsigned WaveSize = getSizeInBits(MI.getOperand(1).getReg(), MRI, *TRI);
       OpdsMapping[0] = AMDGPU::getValueMapping(AMDGPU::VCCRegBankID, 1);
       OpdsMapping[1] = AMDGPU::getValueMapping(AMDGPU::SGPRRegBankID, WaveSize);
       OpdsMapping[3] = AMDGPU::getValueMapping(AMDGPU::SGPRRegBankID, WaveSize);
       break;
     }
+    case Intrinsic::amdgcn_live_mask: {
+      OpdsMapping[0] = AMDGPU::getValueMapping(AMDGPU::VCCRegBankID, 1);
+      break;
+    }
+    case Intrinsic::amdgcn_wqm_demote:
     case Intrinsic::amdgcn_kill: {
       OpdsMapping[1] = AMDGPU::getValueMapping(AMDGPU::VCCRegBankID, 1);
       break;
     }
     case Intrinsic::amdgcn_raw_buffer_load:
     case Intrinsic::amdgcn_raw_tbuffer_load: {
       // FIXME: Should make intrinsic ID the last operand of the instruction,
       // then this would be the same as store

llvm/lib/Target/AMDGPU/AMDGPUSearchableTables.td

 def : SourceOfDivergence<int_amdgcn_struct_buffer_atomic_or>;
 def : SourceOfDivergence<int_amdgcn_struct_buffer_atomic_xor>;
 def : SourceOfDivergence<int_amdgcn_struct_buffer_atomic_inc>;
 def : SourceOfDivergence<int_amdgcn_struct_buffer_atomic_dec>;
 def : SourceOfDivergence<int_amdgcn_struct_buffer_atomic_fadd>;
 def : SourceOfDivergence<int_amdgcn_struct_buffer_atomic_cmpswap>;
 def : SourceOfDivergence<int_amdgcn_buffer_atomic_csub>;
 def : SourceOfDivergence<int_amdgcn_ps_live>;
+def : SourceOfDivergence<int_amdgcn_live_mask>;
 def : SourceOfDivergence<int_amdgcn_ds_swizzle>;
 def : SourceOfDivergence<int_amdgcn_ds_ordered_add>;
 def : SourceOfDivergence<int_amdgcn_ds_ordered_swap>;
 def : SourceOfDivergence<int_amdgcn_permlane16>;
 def : SourceOfDivergence<int_amdgcn_permlanex16>;
 def : SourceOfDivergence<int_amdgcn_mov_dpp>;
 def : SourceOfDivergence<int_amdgcn_mov_dpp8>;
 def : SourceOfDivergence<int_amdgcn_update_dpp>;

llvm/lib/Target/AMDGPU/SIInstructions.td

 }
 
 def SI_PS_LIVE : PseudoInstSI <
   (outs SReg_1:$dst), (ins),
   [(set i1:$dst, (int_amdgcn_ps_live))]> {
   let SALU = 1;
 }
 
+let Uses = [EXEC] in {
+def SI_LIVE_MASK : PseudoInstSI <
+  (outs SReg_1:$dst), (ins),
+  [(set i1:$dst, (int_amdgcn_live_mask))]> {
+  let SALU = 1;
+}
+let Defs = [EXEC,SCC] in {
+// Demote: Turn a pixel shader thread into a helper lane.
+def SI_DEMOTE_I1 : SPseudoInstSI <(outs), (ins SCSrc_i1:$src, i1imm:$killvalue)>;
+} // End Defs = [EXEC,SCC]
+} // End Uses = [EXEC]
+
 def SI_MASKED_UNREACHABLE : SPseudoInstSI <(outs), (ins),
   [(int_amdgcn_unreachable)],
   "; divergent unreachable"> {
   let Size = 0;
   let hasNoSchedulingInfo = 1;
   let FixedSize = 1;
 }
 
def : Pat <
   (SI_KILL_I1_PSEUDO SCSrc_i1:$src, -1)
 >;
 
 def : Pat <
   (int_amdgcn_kill (i1 (setcc f32:$src, InlineImmFP32:$imm, cond:$cond))),
   (SI_KILL_F32_COND_IMM_PSEUDO VSrc_b32:$src, (bitcast_fpimm_to_i32 $imm), (cond_as_i32imm $cond))
 >;
 
+def : Pat <
+  (int_amdgcn_wqm_demote i1:$src),
+  (SI_DEMOTE_I1 SCSrc_i1:$src, 0)
+>;
+
+def : Pat <
+  (int_amdgcn_wqm_demote (i1 (not i1:$src))),
+  (SI_DEMOTE_I1 SCSrc_i1:$src, -1)
+>;
+
   // TODO: we could add more variants for other types of conditionals
 
 def : Pat <
   (i64 (int_amdgcn_icmp i1:$src, (i1 0), (i32 33))),
   (COPY $src) // Return the SGPRs representing i1 src
 >;
 
 def : Pat <

llvm/lib/Target/AMDGPU/SILowerControlFlow.cpp

 class SILowerControlFlow : public MachineFunctionPass {
 private:
   const SIRegisterInfo *TRI = nullptr;
   const SIInstrInfo *TII = nullptr;
   LiveIntervals *LIS = nullptr;
   MachineRegisterInfo *MRI = nullptr;
   SetVector<MachineInstr*> LoweredEndCf;
   DenseSet<Register> LoweredIf;
+  SmallSet<MachineBasicBlock *, 4> KillBlocks;
 
   const TargetRegisterClass *BoolRC = nullptr;
   unsigned AndOpc;
   unsigned OrOpc;
   unsigned XorOpc;
   unsigned MovTermOpc;
   unsigned Andn2TermOpc;
   unsigned XorTermrOpc;
   unsigned OrTermrOpc;
   unsigned OrSaveExecOpc;
   unsigned Exec;
 
+  bool hasKill(const MachineBasicBlock *Begin, const MachineBasicBlock *End);
+
   void emitIf(MachineInstr &MI);
   void emitElse(MachineInstr &MI);
   void emitIfBreak(MachineInstr &MI);
   void emitLoop(MachineInstr &MI);
 
   MachineBasicBlock *emitEndCf(MachineInstr &MI);
 
   void findMaskOperands(MachineInstr &MI, unsigned OpNo,
static void setImpSCCDefDead(MachineInstr &MI, bool IsDead) {
   MachineOperand &ImpDefSCC = MI.getOperand(3);
   assert(ImpDefSCC.getReg() == AMDGPU::SCC && ImpDefSCC.isDef());
 
   ImpDefSCC.setIsDead(IsDead);
 }
 
 char &llvm::SILowerControlFlowID = SILowerControlFlow::ID;
 
-static bool hasKill(const MachineBasicBlock *Begin,
-                    const MachineBasicBlock *End, const SIInstrInfo *TII) {
+bool SILowerControlFlow::hasKill(const MachineBasicBlock *Begin,
+                                 const MachineBasicBlock *End) {
   DenseSet<const MachineBasicBlock*> Visited;
   SmallVector<MachineBasicBlock *, 4> Worklist(Begin->successors());
 
   while (!Worklist.empty()) {
     MachineBasicBlock *MBB = Worklist.pop_back_val();
 
     if (MBB == End || !Visited.insert(MBB).second)
       continue;
-    for (auto &Term : MBB->terminators())
-      if (TII->isKillTerminator(Term.getOpcode()))
-        return true;
+    if (KillBlocks.contains(MBB))
 
     Worklist.append(MBB->succ_begin(), MBB->succ_end());
   }
 
   return false;
 }
 
 static bool isSimpleIf(const MachineInstr &MI, const MachineRegisterInfo *MRI) {
void SILowerControlFlow::emitIf(MachineInstr &MI) {
   // we can optimize SI_IF by returning the full saved exec mask instead of
   // just cleared bits.
   bool SimpleIf = isSimpleIf(MI, MRI);
 
   if (SimpleIf) {
     // Check for SI_KILL_*_TERMINATOR on path from if to endif.
     // if there is any such terminator simplifications are not safe.
     auto UseMI = MRI->use_instr_nodbg_begin(SaveExecReg);
-    SimpleIf = !hasKill(MI.getParent(), UseMI->getParent(), TII);
+    SimpleIf = !hasKill(MI.getParent(), UseMI->getParent());
   }
 
   // Add an implicit def of exec to discourage scheduling VALU after this which
   // will interfere with trying to form s_and_saveexec_b64 later.
   Register CopyReg = SimpleIf ? SaveExecReg
                        : MRI->createVirtualRegister(BoolRC);
   MachineInstr *CopyExec =
     BuildMI(MBB, I, DL, TII->get(AMDGPU::COPY), CopyReg)
if (ST.isWave32()) {
     MovTermOpc = AMDGPU::S_MOV_B64_term;
     Andn2TermOpc = AMDGPU::S_ANDN2_B64_term;
     XorTermrOpc = AMDGPU::S_XOR_B64_term;
     OrTermrOpc = AMDGPU::S_OR_B64_term;
     OrSaveExecOpc = AMDGPU::S_OR_SAVEEXEC_B64;
     Exec = AMDGPU::EXEC;
   }
 
+  // Compute set of blocks with kills
+  const bool CanDemote =
+      MF.getFunction().getCallingConv() == CallingConv::AMDGPU_PS;
+  for (auto &MBB : MF) {
+    for (auto &Term : MBB.terminators()) {
+      if (TII->isKillTerminator(Term.getOpcode())) {
+        KillBlocks.insert(&MBB);
+        break;
+      }
+    }
+    if (CanDemote && !KillBlocks.contains(&MBB)) {
+      for (auto &MI : MBB) {
+        if (MI.getOpcode() == AMDGPU::SI_DEMOTE_I1) {
+          KillBlocks.insert(&MBB);
+          break;
+        }
+      }
+    }
+  }
+
   SmallVector<MachineInstr *, 32> Worklist;
 
   MachineFunction::iterator NextBB;
   for (MachineFunction::iterator BI = MF.begin();
        BI != MF.end(); BI = NextBB) {
     NextBB = std::next(BI);
     MachineBasicBlock *MBB = &*BI;
 
bool SILowerControlFlow::runOnMachineFunction(MachineFunction &MF) {
 
   for (MachineInstr *MI : Worklist)
     process(*MI);
 
   optimizeEndCf();
 
   LoweredEndCf.clear();
   LoweredIf.clear();
+  KillBlocks.clear();
 
   return true;
 }

llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp

for (auto II = MBB.begin(), IE = MBB.end(); II != IE; ++II) {
         if (!(BBI.InNeeds & StateExact)) {
           BBI.InNeeds |= StateExact;
           Worklist.push_back(&MBB);
         }
         GlobalFlags |= StateExact;
         III.Disabled = StateWQM | StateWWM;
         continue;
       } else {
-        if (Opcode == AMDGPU::SI_PS_LIVE) {
+        if (Opcode == AMDGPU::SI_PS_LIVE || Opcode == AMDGPU::SI_LIVE_MASK) {
           LiveMaskQueries.push_back(&MI);
         } else if (Opcode == AMDGPU::SI_KILL_I1_TERMINATOR ||
-                   Opcode == AMDGPU::SI_KILL_F32_COND_IMM_TERMINATOR) {
+                   Opcode == AMDGPU::SI_KILL_F32_COND_IMM_TERMINATOR ||
+                   Opcode == AMDGPU::SI_DEMOTE_I1) {
           KillInstrs.push_back(&MI);
           BBI.NeedsLowering = true;
         } else if (WQMOutputs) {
           // The function is in machine SSA form, which means that physical
           // VGPRs correspond to shader inputs and outputs. Inputs are
           // only used, outputs are only defined.
           // FIXME: is this still valid?
           for (const MachineOperand &MO : MI.defs()) {
MachineInstr *SIWholeQuadMode::lowerKillF32(MachineBasicBlock &MBB,
   return NewTerm;
 }
 
 MachineInstr *SIWholeQuadMode::lowerKillI1(MachineBasicBlock &MBB,
                                            MachineInstr &MI, bool IsWQM) {
   const DebugLoc &DL = MI.getDebugLoc();
   MachineInstr *MaskUpdateMI = nullptr;
 
+  const bool IsDemote = IsWQM && (MI.getOpcode() == AMDGPU::SI_DEMOTE_I1);
   const MachineOperand &Op = MI.getOperand(0);
   int64_t KillVal = MI.getOperand(1).getImm();
   MachineInstr *ComputeKilledMaskMI = nullptr;
   Register CndReg = !Op.isImm() ? Op.getReg() : Register();
   Register TmpReg;
 
   // Is this a static or dynamic kill?
   if (Op.isImm()) {
     if (Op.getImm() == KillVal) {
       // Static: all active lanes are killed
       MaskUpdateMI = BuildMI(MBB, MI, DL, TII->get(AndN2Opc), LiveMaskReg)
                          .addReg(LiveMaskReg)
                          .addReg(Exec);
     } else {
       // Static: kill does nothing
       MachineInstr *NewTerm = nullptr;
+      if (IsDemote) {
+        LIS->RemoveMachineInstrFromMaps(MI);
+      } else {
         assert(MBB.succ_size() == 1);
         NewTerm = BuildMI(MBB, MI, DL, TII->get(AMDGPU::S_BRANCH))
                       .addMBB(*MBB.succ_begin());
         LIS->ReplaceMachineInstrInMaps(MI, *NewTerm);
+      }
       MBB.remove(&MI);
       return NewTerm;
     }
   } else {
     if (!KillVal) {
       // Op represents live lanes after kill,
       // so exec mask needs to be factored in.
       TmpReg = MRI->createVirtualRegister(TRI->getBoolRC());
MachineInstr *SIWholeQuadMode::lowerKillI1(MachineBasicBlock &MBB,
   // State of SCC represents whether any lanes are live in mask,
   // if SCC is 0 then no lanes will be alive anymore.
   MachineInstr *EarlyTermMI =
       BuildMI(MBB, MI, DL, TII->get(AMDGPU::SI_EARLY_TERMINATE_SCC0));
 
   // In the case we got this far some lanes are still live,
   // update EXEC to deactivate lanes as appropriate.
   MachineInstr *NewTerm;
+  MachineInstr *WQMMaskMI = nullptr;
+  Register LiveMaskWQM;
+  if (IsDemote) {
+    // Demotes deactive quads with only helper lanes
+    LiveMaskWQM = MRI->createVirtualRegister(TRI->getBoolRC());
+    WQMMaskMI =
+        BuildMI(MBB, MI, DL, TII->get(WQMOpc), LiveMaskWQM).addReg(LiveMaskReg);
+    NewTerm = BuildMI(MBB, MI, DL, TII->get(AndOpc), Exec)
+                  .addReg(Exec)
+                  .addReg(LiveMaskWQM);
+  } else {
+    // Kills deactivate lanes
     if (Op.isImm()) {
       unsigned MovOpc = ST->isWave32() ? AMDGPU::S_MOV_B32 : AMDGPU::S_MOV_B64;
       NewTerm = BuildMI(MBB, &MI, DL, TII->get(MovOpc), Exec).addImm(0);
     } else if (!IsWQM) {
       NewTerm = BuildMI(MBB, &MI, DL, TII->get(AndOpc), Exec)
                     .addReg(Exec)
                     .addReg(LiveMaskReg);
     } else {
       unsigned Opcode = KillVal ? AndN2Opc : AndOpc;
       NewTerm =
           BuildMI(MBB, &MI, DL, TII->get(Opcode), Exec).addReg(Exec).add(Op);
     }
+  }
 
   // Update live intervals
   LIS->RemoveMachineInstrFromMaps(MI);
   MBB.remove(&MI);
   assert(EarlyTermMI);
   assert(MaskUpdateMI);
   assert(NewTerm);
   if (ComputeKilledMaskMI)
     LIS->InsertMachineInstrInMaps(*ComputeKilledMaskMI);
   LIS->InsertMachineInstrInMaps(*MaskUpdateMI);
   LIS->InsertMachineInstrInMaps(*EarlyTermMI);
+  if (WQMMaskMI)
+    LIS->InsertMachineInstrInMaps(*WQMMaskMI);
   LIS->InsertMachineInstrInMaps(*NewTerm);
 
   if (CndReg) {
     LIS->removeInterval(CndReg);
     LIS->createAndComputeVirtRegInterval(CndReg);
   }
   if (TmpReg)
     LIS->createAndComputeVirtRegInterval(TmpReg);
+  if (LiveMaskWQM)
+    LIS->createAndComputeVirtRegInterval(LiveMaskWQM);
 
   return NewTerm;
 }
 
 // Replace (or supplement) instructions accessing live mask.
 // This can only happen once all the live mask registers have been created
 // and the execute state (WQM/WWM/Exact) of instructions is known.
 void SIWholeQuadMode::lowerBlock(MachineBasicBlock &MBB) {
while (II != IE) {
     auto Next = std::next(II);
     MachineInstr &MI = *II;
 
     if (StateTransition.count(&MI))
       State = StateTransition[&MI];
 
     MachineInstr *SplitPoint = nullptr;
     switch (MI.getOpcode()) {
+    case AMDGPU::SI_DEMOTE_I1:
     case AMDGPU::SI_KILL_I1_TERMINATOR:
       SplitPoint = lowerKillI1(MBB, MI, State == StateWQM);
       break;
     case AMDGPU::SI_KILL_F32_COND_IMM_TERMINATOR:
       SplitPoint = lowerKillF32(MBB, MI);
       break;
     default:
       break;
void SIWholeQuadMode::lowerCopyInstrs() {
   }
 }
 
 void SIWholeQuadMode::lowerKillInstrs(bool IsWQM) {
   for (MachineInstr *MI : KillInstrs) {
     MachineBasicBlock *MBB = MI->getParent();
     MachineInstr *SplitPoint = nullptr;
     switch (MI->getOpcode()) {
+    case AMDGPU::SI_DEMOTE_I1:
     case AMDGPU::SI_KILL_I1_TERMINATOR:
       SplitPoint = lowerKillI1(*MBB, *MI, IsWQM);
       break;
     case AMDGPU::SI_KILL_F32_COND_IMM_TERMINATOR:
       SplitPoint = lowerKillF32(*MBB, *MI);
       break;
     default:
       continue;

llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.wqm.demote.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -global-isel -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
+; RUN: llc -global-isel -march=amdgcn -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GFX9 %s
+; RUN: llc -global-isel -march=amdgcn -mcpu=gfx1010 -mattr=+wavefrontsize32,-wavefrontsize64 -verify-machineinstrs < %s | FileCheck -check-prefix=GFX10-32 %s
+; RUN: llc -global-isel -march=amdgcn -mcpu=gfx1010 -mattr=-wavefrontsize32,+wavefrontsize64 -verify-machineinstrs < %s | FileCheck -check-prefix=GFX10-64 %s
+
+define amdgpu_ps void @static_exact(float %arg0, float %arg1) {
+; SI-LABEL: static_exact:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    v_cmp_ne_u32_e64 s[2:3], 0, 0
+; SI-NEXT:    s_mov_b64 s[0:1], exec
+; SI-NEXT:    s_xor_b64 s[2:3], s[2:3], exec
+; SI-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[2:3]
+; SI-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_cbranch_scc0 BB0_2
+; SI-NEXT:  ; %bb.1: ; %.entry
+; SI-NEXT:    s_and_b64 exec, exec, s[0:1]
+; SI-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; SI-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB0_2:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+;
+; GFX9-LABEL: static_exact:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[2:3], 0, 0
+; GFX9-NEXT:    s_mov_b64 s[0:1], exec
+; GFX9-NEXT:    s_xor_b64 s[2:3], s[2:3], exec
+; GFX9-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[2:3]
+; GFX9-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_cbranch_scc0 BB0_2
+; GFX9-NEXT:  ; %bb.1: ; %.entry
+; GFX9-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX9-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX9-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB0_2:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-32-LABEL: static_exact:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s1, 0, 0
+; GFX10-32-NEXT:    s_mov_b32 s0, exec_lo
+; GFX10-32-NEXT:    v_cmp_gt_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_xor_b32 s1, s1, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s0, s0, s1
+; GFX10-32-NEXT:    s_cbranch_scc0 BB0_2
+; GFX10-32-NEXT:  ; %bb.1: ; %.entry
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s0
+; GFX10-32-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc_lo
+; GFX10-32-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB0_2:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+;
+; GFX10-64-LABEL: static_exact:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[2:3], 0, 0
+; GFX10-64-NEXT:    s_mov_b64 s[0:1], exec
+; GFX10-64-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_xor_b64 s[2:3], s[2:3], exec
+; GFX10-64-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[2:3]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB0_2
+; GFX10-64-NEXT:  ; %bb.1: ; %.entry
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX10-64-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX10-64-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB0_2:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+.entry:
+  %c0 = fcmp olt float %arg0, 0.000000e+00
+  %c1 = fcmp oge float %arg1, 0.0
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  %tmp1 = select i1 %c0, float 1.000000e+00, float 0.000000e+00
+  call void @llvm.amdgcn.exp.f32(i32 1, i32 15, float %tmp1, float %tmp1, float %tmp1, float %tmp1, i1 true, i1 true) #0
+  ret void
+}
+
+define amdgpu_ps void @dynamic_exact(float %arg0, float %arg1) {
+; SI-LABEL: dynamic_exact:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    v_cmp_le_f32_e64 s[0:1], 0, v1
+; SI-NEXT:    s_mov_b64 s[2:3], exec
+; SI-NEXT:    s_xor_b64 s[0:1], s[0:1], exec
+; SI-NEXT:    s_andn2_b64 s[2:3], s[2:3], s[0:1]
+; SI-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_cbranch_scc0 BB1_2
+; SI-NEXT:  ; %bb.1: ; %.entry
+; SI-NEXT:    s_and_b64 exec, exec, s[2:3]
+; SI-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; SI-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB1_2:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+;
+; GFX9-LABEL: dynamic_exact:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    v_cmp_le_f32_e64 s[0:1], 0, v1
+; GFX9-NEXT:    s_mov_b64 s[2:3], exec
+; GFX9-NEXT:    s_xor_b64 s[0:1], s[0:1], exec
+; GFX9-NEXT:    s_andn2_b64 s[2:3], s[2:3], s[0:1]
+; GFX9-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_cbranch_scc0 BB1_2
+; GFX9-NEXT:  ; %bb.1: ; %.entry
+; GFX9-NEXT:    s_and_b64 exec, exec, s[2:3]
+; GFX9-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX9-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB1_2:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-32-LABEL: dynamic_exact:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    v_cmp_le_f32_e64 s0, 0, v1
+; GFX10-32-NEXT:    s_mov_b32 s1, exec_lo
+; GFX10-32-NEXT:    v_cmp_gt_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_xor_b32 s0, s0, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s1, s1, s0
+; GFX10-32-NEXT:    s_cbranch_scc0 BB1_2
+; GFX10-32-NEXT:  ; %bb.1: ; %.entry
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s1
+; GFX10-32-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc_lo
+; GFX10-32-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB1_2:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+;
+; GFX10-64-LABEL: dynamic_exact:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    v_cmp_le_f32_e64 s[0:1], 0, v1
+; GFX10-64-NEXT:    s_mov_b64 s[2:3], exec
+; GFX10-64-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_xor_b64 s[0:1], s[0:1], exec
+; GFX10-64-NEXT:    s_andn2_b64 s[2:3], s[2:3], s[0:1]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB1_2
+; GFX10-64-NEXT:  ; %bb.1: ; %.entry
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[2:3]
+; GFX10-64-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX10-64-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB1_2:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+.entry:
+  %c0 = fcmp olt float %arg0, 0.000000e+00
+  %c1 = fcmp oge float %arg1, 0.0
+  call void @llvm.amdgcn.wqm.demote(i1 %c1)
+  %tmp1 = select i1 %c0, float 1.000000e+00, float 0.000000e+00
+  call void @llvm.amdgcn.exp.f32(i32 1, i32 15, float %tmp1, float %tmp1, float %tmp1, float %tmp1, i1 true, i1 true) #0
+  ret void
+}
+
+define amdgpu_ps void @branch(float %arg0, float %arg1) {
+; SI-LABEL: branch:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; SI-NEXT:    v_cvt_i32_f32_e32 v1, v1
+; SI-NEXT:    v_cmp_ne_u32_e64 s[2:3], 0, 1
+; SI-NEXT:    s_mov_b64 s[0:1], exec
+; SI-NEXT:    v_or_b32_e32 v0, v0, v1
+; SI-NEXT:    v_and_b32_e32 v0, 1, v0
+; SI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v0
+; SI-NEXT:    s_xor_b64 s[2:3], vcc, s[2:3]
+; SI-NEXT:    s_and_saveexec_b64 s[4:5], s[2:3]
+; SI-NEXT:    s_xor_b64 s[2:3], exec, s[4:5]
+; SI-NEXT:  ; %bb.1: ; %.demote
+; SI-NEXT:    v_cmp_ne_u32_e64 s[4:5], 0, 0
+; SI-NEXT:    s_xor_b64 s[4:5], s[4:5], exec
+; SI-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[4:5]
+; SI-NEXT:    s_cbranch_scc0 BB2_4
+; SI-NEXT:  ; %bb.2: ; %.demote
+; SI-NEXT:    s_and_b64 exec, exec, s[0:1]
+; SI-NEXT:  ; %bb.3: ; %.continue
+; SI-NEXT:    s_or_b64 exec, exec, s[2:3]
+; SI-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; SI-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB2_4:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+;
+; GFX9-LABEL: branch:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX9-NEXT:    v_cvt_i32_f32_e32 v1, v1
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[2:3], 0, 1
+; GFX9-NEXT:    s_mov_b64 s[0:1], exec
+; GFX9-NEXT:    v_or_b32_e32 v0, v0, v1
+; GFX9-NEXT:    v_and_b32_e32 v0, 1, v0
+; GFX9-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_xor_b64 s[2:3], vcc, s[2:3]
+; GFX9-NEXT:    s_and_saveexec_b64 s[4:5], s[2:3]
+; GFX9-NEXT:    s_xor_b64 s[2:3], exec, s[4:5]
+; GFX9-NEXT:  ; %bb.1: ; %.demote
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[4:5], 0, 0
+; GFX9-NEXT:    s_xor_b64 s[4:5], s[4:5], exec
+; GFX9-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[4:5]
+; GFX9-NEXT:    s_cbranch_scc0 BB2_4
+; GFX9-NEXT:  ; %bb.2: ; %.demote
+; GFX9-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX9-NEXT:  ; %bb.3: ; %.continue
+; GFX9-NEXT:    s_or_b64 exec, exec, s[2:3]
+; GFX9-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX9-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB2_4:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-32-LABEL: branch:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-32-NEXT:    v_cvt_i32_f32_e32 v1, v1
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s1, 0, 1
+; GFX10-32-NEXT:    s_mov_b32 s0, exec_lo
+; GFX10-32-NEXT:    v_or_b32_e32 v0, v0, v1
+; GFX10-32-NEXT:    v_and_b32_e32 v0, 1, v0
+; GFX10-32-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_xor_b32 s1, vcc_lo, s1
+; GFX10-32-NEXT:    s_and_saveexec_b32 s2, s1
+; GFX10-32-NEXT:    s_xor_b32 s1, exec_lo, s2
+; GFX10-32-NEXT:  ; %bb.1: ; %.demote
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s2, 0, 0
+; GFX10-32-NEXT:    s_xor_b32 s2, s2, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s0, s0, s2
+; GFX10-32-NEXT:    s_cbranch_scc0 BB2_4
+; GFX10-32-NEXT:  ; %bb.2: ; %.demote
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s0
+; GFX10-32-NEXT:  ; %bb.3: ; %.continue
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s1
+; GFX10-32-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc_lo
+; GFX10-32-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB2_4:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+;
+; GFX10-64-LABEL: branch:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-64-NEXT:    v_cvt_i32_f32_e32 v1, v1
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[2:3], 0, 1
+; GFX10-64-NEXT:    s_mov_b64 s[0:1], exec
+; GFX10-64-NEXT:    v_or_b32_e32 v0, v0, v1
+; GFX10-64-NEXT:    v_and_b32_e32 v0, 1, v0
+; GFX10-64-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_xor_b64 s[2:3], vcc, s[2:3]
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[4:5], s[2:3]
+; GFX10-64-NEXT:    s_xor_b64 s[2:3], exec, s[4:5]
+; GFX10-64-NEXT:  ; %bb.1: ; %.demote
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[4:5], 0, 0
+; GFX10-64-NEXT:    s_xor_b64 s[4:5], s[4:5], exec
+; GFX10-64-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[4:5]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB2_4
+; GFX10-64-NEXT:  ; %bb.2: ; %.demote
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX10-64-NEXT:  ; %bb.3: ; %.continue
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[2:3]
+; GFX10-64-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX10-64-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB2_4:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+.entry:
+  %i0 = fptosi float %arg0 to i32
+  %i1 = fptosi float %arg1 to i32
+  %c0 = or i32 %i0, %i1
+  %c1 = and i32 %c0, 1
+  %c2 = icmp eq i32 %c1, 0
+  br i1 %c2, label %.continue, label %.demote
+
+.demote:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue
+
+.continue:
+  %tmp1 = select i1 %c2, float 1.000000e+00, float 0.000000e+00
+  call void @llvm.amdgcn.exp.f32(i32 1, i32 15, float %tmp1, float %tmp1, float %tmp1, float %tmp1, i1 true, i1 true) #0
+  ret void
+}
+
+define amdgpu_ps <4 x float> @wqm_demote_1(<8 x i32> inreg %rsrc, <4 x i32> inreg %sampler, i32 %idx, float %data, float %coord, float %coord2, float %z) {
+; SI-LABEL: wqm_demote_1:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    s_mov_b64 s[12:13], exec
+; SI-NEXT:    s_wqm_b64 exec, exec
+; SI-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v1
+; SI-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; SI-NEXT:    s_xor_b64 s[14:15], exec, s[14:15]
+; SI-NEXT:  ; %bb.1: ; %.demote
+; SI-NEXT:    v_cmp_ne_u32_e64 s[16:17], 0, 0
+; SI-NEXT:    s_xor_b64 s[16:17], s[16:17], exec
+; SI-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[16:17]
+; SI-NEXT:    s_cbranch_scc0 BB3_4
+; SI-NEXT:  ; %bb.2: ; %.demote
+; SI-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; SI-NEXT:    s_and_b64 exec, exec, s[16:17]
+; SI-NEXT:  ; %bb.3: ; %.continue
+; SI-NEXT:    s_or_b64 exec, exec, s[14:15]
+; SI-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    v_add_f32_e32 v0, v0, v0
+; SI-NEXT:    s_and_b64 exec, exec, s[12:13]
+; SI-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    s_branch BB3_5
+; SI-NEXT:  BB3_4:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB3_5:
+;
+; GFX9-LABEL: wqm_demote_1:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    s_mov_b64 s[12:13], exec
+; GFX9-NEXT:    s_wqm_b64 exec, exec
+; GFX9-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v1
+; GFX9-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; GFX9-NEXT:    s_xor_b64 s[14:15], exec, s[14:15]
+; GFX9-NEXT:  ; %bb.1: ; %.demote
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[16:17], 0, 0
+; GFX9-NEXT:    s_xor_b64 s[16:17], s[16:17], exec
+; GFX9-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[16:17]
+; GFX9-NEXT:    s_cbranch_scc0 BB3_4
+; GFX9-NEXT:  ; %bb.2: ; %.demote
+; GFX9-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[16:17]
+; GFX9-NEXT:  ; %bb.3: ; %.continue
+; GFX9-NEXT:    s_or_b64 exec, exec, s[14:15]
+; GFX9-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX9-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX9-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    s_branch BB3_5
+; GFX9-NEXT:  BB3_4:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB3_5:
+;
+; GFX10-32-LABEL: wqm_demote_1:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 s12, exec_lo
+; GFX10-32-NEXT:    s_wqm_b32 exec_lo, exec_lo
+; GFX10-32-NEXT:    v_cmp_ngt_f32_e32 vcc_lo, 0, v1
+; GFX10-32-NEXT:    s_and_saveexec_b32 s13, vcc_lo
+; GFX10-32-NEXT:    s_xor_b32 s13, exec_lo, s13
+; GFX10-32-NEXT:  ; %bb.1: ; %.demote
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s28, 0, 0
+; GFX10-32-NEXT:    s_xor_b32 s14, s28, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s12, s12, s14
+; GFX10-32-NEXT:    s_cbranch_scc0 BB3_4
+; GFX10-32-NEXT:  ; %bb.2: ; %.demote
+; GFX10-32-NEXT:    s_wqm_b32 s28, s12
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s28
+; GFX10-32-NEXT:  ; %bb.3: ; %.continue
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s13
+; GFX10-32-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s12
+; GFX10-32-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    s_branch BB3_5
+; GFX10-32-NEXT:  BB3_4:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB3_5:
+;
+; GFX10-64-LABEL: wqm_demote_1:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 s[12:13], exec
+; GFX10-64-NEXT:    s_wqm_b64 exec, exec
+; GFX10-64-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v1
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; GFX10-64-NEXT:    s_xor_b64 s[28:29], exec, s[14:15]
+; GFX10-64-NEXT:  ; %bb.1: ; %.demote
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[16:17], 0, 0
+; GFX10-64-NEXT:    s_xor_b64 s[16:17], s[16:17], exec
+; GFX10-64-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[16:17]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB3_4
+; GFX10-64-NEXT:  ; %bb.2: ; %.demote
+; GFX10-64-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[16:17]
+; GFX10-64-NEXT:  ; %bb.3: ; %.continue
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[28:29]
+; GFX10-64-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX10-64-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    s_branch BB3_5
+; GFX10-64-NEXT:  BB3_4:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB3_5:
+.entry:
+  %z.cmp = fcmp olt float %z, 0.0
+  br i1 %z.cmp, label %.continue, label %.demote
+
+.demote:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue
+
+.continue:
+  %tex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+  %tex0 = extractelement <4 x float> %tex, i32 0
+  %tex1 = extractelement <4 x float> %tex, i32 0
+  %coord1 = fadd float %tex0, %tex1
+  %rtex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord1, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+
+  ret <4 x float> %rtex
+}
+
+define amdgpu_ps <4 x float> @wqm_demote_2(<8 x i32> inreg %rsrc, <4 x i32> inreg %sampler, i32 %idx, float %data, float %coord, float %coord2, float %z) {
+; SI-LABEL: wqm_demote_2:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    s_mov_b64 s[12:13], exec
+; SI-NEXT:    s_wqm_b64 exec, exec
+; SI-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; SI-NEXT:    s_xor_b64 s[14:15], exec, s[14:15]
+; SI-NEXT:  ; %bb.1: ; %.demote
+; SI-NEXT:    v_cmp_ne_u32_e64 s[16:17], 0, 0
+; SI-NEXT:    s_xor_b64 s[16:17], s[16:17], exec
+; SI-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[16:17]
+; SI-NEXT:    s_cbranch_scc0 BB4_4
+; SI-NEXT:  ; %bb.2: ; %.demote
+; SI-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; SI-NEXT:    s_and_b64 exec, exec, s[16:17]
+; SI-NEXT:  ; %bb.3: ; %.continue
+; SI-NEXT:    s_or_b64 exec, exec, s[14:15]
+; SI-NEXT:    v_add_f32_e32 v0, v0, v0
+; SI-NEXT:    s_and_b64 exec, exec, s[12:13]
+; SI-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    s_branch BB4_5
+; SI-NEXT:  BB4_4:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB4_5:
+;
+; GFX9-LABEL: wqm_demote_2:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    s_mov_b64 s[12:13], exec
+; GFX9-NEXT:    s_wqm_b64 exec, exec
+; GFX9-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; GFX9-NEXT:    s_xor_b64 s[14:15], exec, s[14:15]
+; GFX9-NEXT:  ; %bb.1: ; %.demote
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[16:17], 0, 0
+; GFX9-NEXT:    s_xor_b64 s[16:17], s[16:17], exec
+; GFX9-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[16:17]
+; GFX9-NEXT:    s_cbranch_scc0 BB4_4
+; GFX9-NEXT:  ; %bb.2: ; %.demote
+; GFX9-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[16:17]
+; GFX9-NEXT:  ; %bb.3: ; %.continue
+; GFX9-NEXT:    s_or_b64 exec, exec, s[14:15]
+; GFX9-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX9-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX9-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    s_branch BB4_5
+; GFX9-NEXT:  BB4_4:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB4_5:
+;
+; GFX10-32-LABEL: wqm_demote_2:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 s12, exec_lo
+; GFX10-32-NEXT:    s_wqm_b32 exec_lo, exec_lo
+; GFX10-32-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    v_cmp_ngt_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_and_saveexec_b32 s13, vcc_lo
+; GFX10-32-NEXT:    s_xor_b32 s13, exec_lo, s13
+; GFX10-32-NEXT:  ; %bb.1: ; %.demote
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s28, 0, 0
+; GFX10-32-NEXT:    s_xor_b32 s14, s28, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s12, s12, s14
+; GFX10-32-NEXT:    s_cbranch_scc0 BB4_4
+; GFX10-32-NEXT:  ; %bb.2: ; %.demote
+; GFX10-32-NEXT:    s_wqm_b32 s28, s12
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s28
+; GFX10-32-NEXT:  ; %bb.3: ; %.continue
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s13
+; GFX10-32-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s12
+; GFX10-32-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    s_branch BB4_5
+; GFX10-32-NEXT:  BB4_4:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB4_5:
+;
+; GFX10-64-LABEL: wqm_demote_2:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 s[12:13], exec
+; GFX10-64-NEXT:    s_wqm_b64 exec, exec
+; GFX10-64-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; GFX10-64-NEXT:    s_xor_b64 s[28:29], exec, s[14:15]
+; GFX10-64-NEXT:  ; %bb.1: ; %.demote
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[16:17], 0, 0
+; GFX10-64-NEXT:    s_xor_b64 s[16:17], s[16:17], exec
+; GFX10-64-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[16:17]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB4_4
+; GFX10-64-NEXT:  ; %bb.2: ; %.demote
+; GFX10-64-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[16:17]
+; GFX10-64-NEXT:  ; %bb.3: ; %.continue
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[28:29]
+; GFX10-64-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX10-64-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    s_branch BB4_5
+; GFX10-64-NEXT:  BB4_4:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB4_5:
+.entry:
+  %tex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+  %tex0 = extractelement <4 x float> %tex, i32 0
+  %tex1 = extractelement <4 x float> %tex, i32 0
+  %z.cmp = fcmp olt float %tex0, 0.0
+  br i1 %z.cmp, label %.continue, label %.demote
+
+.demote:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue
+
+.continue:
+  %coord1 = fadd float %tex0, %tex1
+  %rtex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord1, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+
+  ret <4 x float> %rtex
+}
+
+define amdgpu_ps <4 x float> @wqm_demote_dynamic(<8 x i32> inreg %rsrc, <4 x i32> inreg %sampler, i32 %idx, float %data, float %coord, float %coord2, float %z) {
+; SI-LABEL: wqm_demote_dynamic:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    s_mov_b64 s[12:13], exec
+; SI-NEXT:    s_wqm_b64 exec, exec
+; SI-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_xor_b64 s[14:15], vcc, exec
+; SI-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[14:15]
+; SI-NEXT:    s_cbranch_scc0 BB5_2
+; SI-NEXT:  ; %bb.1: ; %.entry
+; SI-NEXT:    s_wqm_b64 s[14:15], s[12:13]
+; SI-NEXT:    s_and_b64 exec, exec, s[14:15]
+; SI-NEXT:    v_add_f32_e32 v0, v0, v0
+; SI-NEXT:    s_and_b64 exec, exec, s[12:13]
+; SI-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    s_branch BB5_3
+; SI-NEXT:  BB5_2:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB5_3:
+;
+; GFX9-LABEL: wqm_demote_dynamic:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    s_mov_b64 s[12:13], exec
+; GFX9-NEXT:    s_wqm_b64 exec, exec
+; GFX9-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_xor_b64 s[14:15], vcc, exec
+; GFX9-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[14:15]
+; GFX9-NEXT:    s_cbranch_scc0 BB5_2
+; GFX9-NEXT:  ; %bb.1: ; %.entry
+; GFX9-NEXT:    s_wqm_b64 s[14:15], s[12:13]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[14:15]
+; GFX9-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX9-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX9-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    s_branch BB5_3
+; GFX9-NEXT:  BB5_2:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB5_3:
+;
+; GFX10-32-LABEL: wqm_demote_dynamic:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 s12, exec_lo
+; GFX10-32-NEXT:    s_wqm_b32 exec_lo, exec_lo
+; GFX10-32-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    v_cmp_gt_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_xor_b32 s13, vcc_lo, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s12, s12, s13
+; GFX10-32-NEXT:    s_cbranch_scc0 BB5_2
+; GFX10-32-NEXT:  ; %bb.1: ; %.entry
+; GFX10-32-NEXT:    s_wqm_b32 s13, s12
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s13
+; GFX10-32-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s12
+; GFX10-32-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    s_branch BB5_3
+; GFX10-32-NEXT:  BB5_2:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB5_3:
+;
+; GFX10-64-LABEL: wqm_demote_dynamic:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 s[12:13], exec
+; GFX10-64-NEXT:    s_wqm_b64 exec, exec
+; GFX10-64-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_xor_b64 s[14:15], vcc, exec
+; GFX10-64-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[14:15]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB5_2
+; GFX10-64-NEXT:  ; %bb.1: ; %.entry
+; GFX10-64-NEXT:    s_wqm_b64 s[28:29], s[12:13]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[28:29]
+; GFX10-64-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX10-64-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    s_branch BB5_3
+; GFX10-64-NEXT:  BB5_2:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB5_3:
+.entry:
+  %tex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+  %tex0 = extractelement <4 x float> %tex, i32 0
+  %tex1 = extractelement <4 x float> %tex, i32 0
+  %z.cmp = fcmp olt float %tex0, 0.0
+  call void @llvm.amdgcn.wqm.demote(i1 %z.cmp)
+  %coord1 = fadd float %tex0, %tex1
+  %rtex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord1, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+
+  ret <4 x float> %rtex
+}
+
+define amdgpu_ps void @wqm_deriv(<2 x float> %input, float %arg, i32 %index) {
+; SI-LABEL: wqm_deriv:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    s_mov_b64 s[0:1], exec
+; SI-NEXT:    s_wqm_b64 exec, exec
+; SI-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; SI-NEXT:    s_movk_i32 s2, 0x3c00
+; SI-NEXT:    s_bfe_u32 s4, 0, 0x100000
+; SI-NEXT:    s_bfe_u32 s3, s2, 0x100000
+; SI-NEXT:    s_lshl_b32 s2, s4, 16
+; SI-NEXT:    s_or_b32 s2, s3, s2
+; SI-NEXT:    s_lshl_b32 s3, s3, 16
+; SI-NEXT:    s_or_b32 s3, s4, s3
+; SI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; SI-NEXT:    s_and_saveexec_b64 s[4:5], vcc
+; SI-NEXT:    s_xor_b64 s[4:5], exec, s[4:5]
+; SI-NEXT:  ; %bb.1: ; %.demote0
+; SI-NEXT:    v_cmp_ne_u32_e64 s[6:7], 0, 0
+; SI-NEXT:    s_xor_b64 s[6:7], s[6:7], exec
+; SI-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[6:7]
+; SI-NEXT:    s_cbranch_scc0 BB6_7
+; SI-NEXT:  ; %bb.2: ; %.demote0
+; SI-NEXT:    s_wqm_b64 s[6:7], s[0:1]
+; SI-NEXT:    s_and_b64 exec, exec, s[6:7]
+; SI-NEXT:  ; %bb.3: ; %.continue0
+; SI-NEXT:    s_or_b64 exec, exec, s[4:5]
+; SI-NEXT:    s_mov_b64 s[4:5], s[0:1]
+; SI-NEXT:    v_cndmask_b32_e64 v0, 1.0, 0, s[4:5]
+; SI-NEXT:    v_mov_b32_e32 v1, v0
+; SI-NEXT:    s_nop 1
+; SI-NEXT:    v_mov_b32_dpp v1, v1 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; SI-NEXT:    s_nop 1
+; SI-NEXT:    v_subrev_f32_dpp v0, v0, v1 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; SI-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; SI-NEXT:    s_and_b64 exec, exec, s[0:1]
+; SI-NEXT:    v_cmp_eq_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_and_b64 s[4:5], s[0:1], vcc
+; SI-NEXT:    v_cmp_ne_u32_e64 s[6:7], 0, 1
+; SI-NEXT:    s_xor_b64 s[4:5], s[4:5], s[6:7]
+; SI-NEXT:    s_and_saveexec_b64 s[6:7], s[4:5]
+; SI-NEXT:    s_xor_b64 s[4:5], exec, s[6:7]
+; SI-NEXT:  ; %bb.4: ; %.demote1
+; SI-NEXT:    v_cmp_ne_u32_e64 s[6:7], 0, 0
+; SI-NEXT:    s_xor_b64 s[6:7], s[6:7], exec
+; SI-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[6:7]
+; SI-NEXT:    s_cbranch_scc0 BB6_7
+; SI-NEXT:  ; %bb.5: ; %.demote1
+; SI-NEXT:    s_and_b64 exec, exec, s[0:1]
+; SI-NEXT:  ; %bb.6: ; %.continue1
+; SI-NEXT:    s_or_b64 exec, exec, s[4:5]
+; SI-NEXT:    v_mov_b32_e32 v0, s2
+; SI-NEXT:    v_mov_b32_e32 v1, s3
+; SI-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB6_7:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+;
+; GFX9-LABEL: wqm_deriv:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    s_mov_b64 s[0:1], exec
+; GFX9-NEXT:    s_wqm_b64 exec, exec
+; GFX9-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX9-NEXT:    s_movk_i32 s3, 0x3c00
+; GFX9-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_and_saveexec_b64 s[4:5], vcc
+; GFX9-NEXT:    s_xor_b64 s[4:5], exec, s[4:5]
+; GFX9-NEXT:  ; %bb.1: ; %.demote0
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[6:7], 0, 0
+; GFX9-NEXT:    s_xor_b64 s[6:7], s[6:7], exec
+; GFX9-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[6:7]
+; GFX9-NEXT:    s_cbranch_scc0 BB6_7
+; GFX9-NEXT:  ; %bb.2: ; %.demote0
+; GFX9-NEXT:    s_wqm_b64 s[6:7], s[0:1]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[6:7]
+; GFX9-NEXT:  ; %bb.3: ; %.continue0
+; GFX9-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX9-NEXT:    s_mov_b64 s[4:5], s[0:1]
+; GFX9-NEXT:    v_cndmask_b32_e64 v0, 1.0, 0, s[4:5]
+; GFX9-NEXT:    v_mov_b32_e32 v1, v0
+; GFX9-NEXT:    s_pack_ll_b32_b16 s2, s3, 0
+; GFX9-NEXT:    s_pack_ll_b32_b16 s3, 0, s3
+; GFX9-NEXT:    v_mov_b32_dpp v1, v1 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX9-NEXT:    s_nop 1
+; GFX9-NEXT:    v_subrev_f32_dpp v0, v0, v1 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX9-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; GFX9-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX9-NEXT:    v_cmp_eq_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_and_b64 s[4:5], s[0:1], vcc
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[6:7], 0, 1
+; GFX9-NEXT:    s_xor_b64 s[4:5], s[4:5], s[6:7]
+; GFX9-NEXT:    s_and_saveexec_b64 s[6:7], s[4:5]
+; GFX9-NEXT:    s_xor_b64 s[4:5], exec, s[6:7]
+; GFX9-NEXT:  ; %bb.4: ; %.demote1
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[6:7], 0, 0
+; GFX9-NEXT:    s_xor_b64 s[6:7], s[6:7], exec
+; GFX9-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[6:7]
+; GFX9-NEXT:    s_cbranch_scc0 BB6_7
+; GFX9-NEXT:  ; %bb.5: ; %.demote1
+; GFX9-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX9-NEXT:  ; %bb.6: ; %.continue1
+; GFX9-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX9-NEXT:    v_mov_b32_e32 v0, s2
+; GFX9-NEXT:    v_mov_b32_e32 v1, s3
+; GFX9-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB6_7:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-32-LABEL: wqm_deriv:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 s0, exec_lo
+; GFX10-32-NEXT:    s_wqm_b32 exec_lo, exec_lo
+; GFX10-32-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-32-NEXT:    s_movk_i32 s1, 0x3c00
+; GFX10-32-NEXT:    v_cmp_ne_u32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_and_saveexec_b32 s2, vcc_lo
+; GFX10-32-NEXT:    s_xor_b32 s2, exec_lo, s2
+; GFX10-32-NEXT:  ; %bb.1: ; %.demote0
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s3, 0, 0
+; GFX10-32-NEXT:    s_xor_b32 s3, s3, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s0, s0, s3
+; GFX10-32-NEXT:    s_cbranch_scc0 BB6_7
+; GFX10-32-NEXT:  ; %bb.2: ; %.demote0
+; GFX10-32-NEXT:    s_wqm_b32 s3, s0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s3
+; GFX10-32-NEXT:  ; %bb.3: ; %.continue0
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s2
+; GFX10-32-NEXT:    s_mov_b32 s3, s0
+; GFX10-32-NEXT:    v_cndmask_b32_e64 v0, 1.0, 0, s3
+; GFX10-32-NEXT:    v_mov_b32_e32 v1, v0
+; GFX10-32-NEXT:    v_mov_b32_dpp v1, v1 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-32-NEXT:    v_subrev_f32_dpp v0, v0, v1 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-32-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s0
+; GFX10-32-NEXT:    v_cmp_eq_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s4, 0, 1
+; GFX10-32-NEXT:    s_pack_ll_b32_b16 s2, s1, 0
+; GFX10-32-NEXT:    s_pack_ll_b32_b16 s1, 0, s1
+; GFX10-32-NEXT:    s_and_b32 s3, s0, vcc_lo
+; GFX10-32-NEXT:    s_xor_b32 s3, s3, s4
+; GFX10-32-NEXT:    s_and_saveexec_b32 s4, s3
+; GFX10-32-NEXT:    s_xor_b32 s3, exec_lo, s4
+; GFX10-32-NEXT:  ; %bb.4: ; %.demote1
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s4, 0, 0
+; GFX10-32-NEXT:    s_xor_b32 s4, s4, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s0, s0, s4
+; GFX10-32-NEXT:    s_cbranch_scc0 BB6_7
+; GFX10-32-NEXT:  ; %bb.5: ; %.demote1
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s0
+; GFX10-32-NEXT:  ; %bb.6: ; %.continue1
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s3
+; GFX10-32-NEXT:    v_mov_b32_e32 v0, s2
+; GFX10-32-NEXT:    v_mov_b32_e32 v1, s1
+; GFX10-32-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB6_7:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+;
+; GFX10-64-LABEL: wqm_deriv:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 s[0:1], exec
+; GFX10-64-NEXT:    s_wqm_b64 exec, exec
+; GFX10-64-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-64-NEXT:    s_movk_i32 s2, 0x3c00
+; GFX10-64-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[4:5], vcc
+; GFX10-64-NEXT:    s_xor_b64 s[4:5], exec, s[4:5]
+; GFX10-64-NEXT:  ; %bb.1: ; %.demote0
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[6:7], 0, 0
+; GFX10-64-NEXT:    s_xor_b64 s[6:7], s[6:7], exec
+; GFX10-64-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[6:7]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB6_7
+; GFX10-64-NEXT:  ; %bb.2: ; %.demote0
+; GFX10-64-NEXT:    s_wqm_b64 s[6:7], s[0:1]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[6:7]
+; GFX10-64-NEXT:  ; %bb.3: ; %.continue0
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX10-64-NEXT:    s_mov_b64 s[4:5], s[0:1]
+; GFX10-64-NEXT:    v_cndmask_b32_e64 v0, 1.0, 0, s[4:5]
+; GFX10-64-NEXT:    v_mov_b32_e32 v1, v0
+; GFX10-64-NEXT:    v_mov_b32_dpp v1, v1 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-64-NEXT:    v_subrev_f32_dpp v0, v0, v1 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-64-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX10-64-NEXT:    v_cmp_eq_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[6:7], 0, 1
+; GFX10-64-NEXT:    s_pack_ll_b32_b16 s3, s2, 0
+; GFX10-64-NEXT:    s_pack_ll_b32_b16 s2, 0, s2
+; GFX10-64-NEXT:    s_and_b64 s[4:5], s[0:1], vcc
+; GFX10-64-NEXT:    s_xor_b64 s[4:5], s[4:5], s[6:7]
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[6:7], s[4:5]
+; GFX10-64-NEXT:    s_xor_b64 s[4:5], exec, s[6:7]
+; GFX10-64-NEXT:  ; %bb.4: ; %.demote1
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[6:7], 0, 0
+; GFX10-64-NEXT:    s_xor_b64 s[6:7], s[6:7], exec
+; GFX10-64-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[6:7]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB6_7
+; GFX10-64-NEXT:  ; %bb.5: ; %.demote1
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX10-64-NEXT:  ; %bb.6: ; %.continue1
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX10-64-NEXT:    v_mov_b32_e32 v0, s3
+; GFX10-64-NEXT:    v_mov_b32_e32 v1, s2
+; GFX10-64-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB6_7:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+.entry:
+  %p0 = extractelement <2 x float> %input, i32 0
+  %p1 = extractelement <2 x float> %input, i32 1
+  %x0 = call float @llvm.amdgcn.interp.p1(float %p0, i32 immarg 0, i32 immarg 0, i32 %index) #2
+  %x1 = call float @llvm.amdgcn.interp.p2(float %x0, float %p1, i32 immarg 0, i32 immarg 0, i32 %index) #2
+  %argi = fptosi float %arg to i32
+  %cond0 = icmp eq i32 %argi, 0
+  br i1 %cond0, label %.continue0, label %.demote0
+
+.demote0:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue0
+
+.continue0:
+  %live = call i1 @llvm.amdgcn.live.mask()
+  %live.cond = select i1 %live, i32 0, i32 1065353216
+  %live.v0 = call i32 @llvm.amdgcn.mov.dpp.i32(i32 %live.cond, i32 85, i32 15, i32 15, i1 true)
+  %live.v0f = bitcast i32 %live.v0 to float
+  %live.v1 = call i32 @llvm.amdgcn.mov.dpp.i32(i32 %live.cond, i32 0, i32 15, i32 15, i1 true)
+  %live.v1f = bitcast i32 %live.v1 to float
+  %v0 = fsub float %live.v0f, %live.v1f
+  %v0.wqm = call float @llvm.amdgcn.wqm.f32(float %v0)
+  %cond1 = fcmp oeq float %v0.wqm, 0.000000e+00
+  %cond2 = and i1 %live, %cond1
+  br i1 %cond2, label %.continue1, label %.demote1
+
+.demote1:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue1
+
+.continue1:
+  call void @llvm.amdgcn.exp.compr.v2f16(i32 immarg 0, i32 immarg 15, <2 x half> <half 0xH3C00, half 0xH0000>, <2 x half> <half 0xH0000, half 0xH3C00>, i1 immarg true, i1 immarg true) #3
+  ret void
+}
+
+define amdgpu_ps void @wqm_deriv_loop(<2 x float> %input, float %arg, i32 %index, i32 %limit) {
+; SI-LABEL: wqm_deriv_loop:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    s_mov_b64 s[0:1], exec
+; SI-NEXT:    s_wqm_b64 exec, exec
+; SI-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; SI-NEXT:    s_movk_i32 s2, 0x3c00
+; SI-NEXT:    s_bfe_u32 s4, 0, 0x100000
+; SI-NEXT:    s_bfe_u32 s3, s2, 0x100000
+; SI-NEXT:    s_lshl_b32 s2, s4, 16
+; SI-NEXT:    s_or_b32 s2, s3, s2
+; SI-NEXT:    s_lshl_b32 s3, s3, 16
+; SI-NEXT:    s_or_b32 s3, s4, s3
+; SI-NEXT:    s_mov_b32 s6, 0
+; SI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; SI-NEXT:    s_and_saveexec_b64 s[4:5], vcc
+; SI-NEXT:    s_xor_b64 s[4:5], exec, s[4:5]
+; SI-NEXT:  ; %bb.1: ; %.demote0
+; SI-NEXT:    v_cmp_ne_u32_e64 s[8:9], 0, 0
+; SI-NEXT:    s_xor_b64 s[8:9], s[8:9], exec
+; SI-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[8:9]
+; SI-NEXT:    s_cbranch_scc0 BB7_9
+; SI-NEXT:  ; %bb.2: ; %.demote0
+; SI-NEXT:    s_wqm_b64 s[8:9], s[0:1]
+; SI-NEXT:    s_and_b64 exec, exec, s[8:9]
+; SI-NEXT:  ; %bb.3: ; %.continue0.preheader
+; SI-NEXT:    s_or_b64 exec, exec, s[4:5]
+; SI-NEXT:    s_mov_b64 s[4:5], 0
+; SI-NEXT:    v_mov_b32_e32 v0, s6
+; SI-NEXT:    s_branch BB7_5
+; SI-NEXT:  BB7_4: ; %.continue1
+; SI-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; SI-NEXT:    s_or_b64 exec, exec, s[6:7]
+; SI-NEXT:    v_add_u32_e32 v0, vcc, 1, v0
+; SI-NEXT:    v_cmp_ge_i32_e32 vcc, v0, v1
+; SI-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
+; SI-NEXT:    s_andn2_b64 exec, exec, s[4:5]
+; SI-NEXT:    s_cbranch_execz BB7_8
+; SI-NEXT:  BB7_5: ; %.continue0
+; SI-NEXT:    ; =>This Inner Loop Header: Depth=1
+; SI-NEXT:    s_mov_b64 s[6:7], s[0:1]
+; SI-NEXT:    v_cndmask_b32_e64 v2, v0, 0, s[6:7]
+; SI-NEXT:    v_mov_b32_e32 v3, v2
+; SI-NEXT:    v_cmp_ne_u32_e64 s[8:9], 0, 1
+; SI-NEXT:    s_nop 0
+; SI-NEXT:    v_mov_b32_dpp v3, v3 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; SI-NEXT:    s_nop 1
+; SI-NEXT:    v_subrev_f32_dpp v2, v2, v3 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; SI-NEXT:    ; kill: def $vgpr2 killed $vgpr2 killed $exec
+; SI-NEXT:    v_cmp_eq_f32_e32 vcc, 0, v2
+; SI-NEXT:    s_and_b64 s[6:7], s[0:1], vcc
+; SI-NEXT:    s_xor_b64 s[6:7], s[6:7], s[8:9]
+; SI-NEXT:    s_and_saveexec_b64 s[8:9], s[6:7]
+; SI-NEXT:    s_xor_b64 s[6:7], exec, s[8:9]
+; SI-NEXT:    s_cbranch_execz BB7_4
+; SI-NEXT:  ; %bb.6: ; %.demote1
+; SI-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; SI-NEXT:    v_cmp_ne_u32_e64 s[8:9], 0, 0
+; SI-NEXT:    s_xor_b64 s[8:9], s[8:9], exec
+; SI-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[8:9]
+; SI-NEXT:    s_cbranch_scc0 BB7_9
+; SI-NEXT:  ; %bb.7: ; %.demote1
+; SI-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; SI-NEXT:    s_wqm_b64 s[8:9], s[0:1]
+; SI-NEXT:    s_and_b64 exec, exec, s[8:9]
+; SI-NEXT:    s_branch BB7_4
+; SI-NEXT:  BB7_8: ; %.return
+; SI-NEXT:    s_or_b64 exec, exec, s[4:5]
+; SI-NEXT:    s_and_b64 exec, exec, s[0:1]
+; SI-NEXT:    v_mov_b32_e32 v0, s2
+; SI-NEXT:    v_mov_b32_e32 v1, s3
+; SI-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB7_9:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+;
+; GFX9-LABEL: wqm_deriv_loop:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    s_mov_b64 s[0:1], exec
+; GFX9-NEXT:    s_wqm_b64 exec, exec
+; GFX9-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX9-NEXT:    s_movk_i32 s3, 0x3c00
+; GFX9-NEXT:    s_mov_b32 s6, 0
+; GFX9-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_and_saveexec_b64 s[4:5], vcc
+; GFX9-NEXT:    s_xor_b64 s[4:5], exec, s[4:5]
+; GFX9-NEXT:  ; %bb.1: ; %.demote0
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[8:9], 0, 0
+; GFX9-NEXT:    s_xor_b64 s[8:9], s[8:9], exec
+; GFX9-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[8:9]
+; GFX9-NEXT:    s_cbranch_scc0 BB7_9
+; GFX9-NEXT:  ; %bb.2: ; %.demote0
+; GFX9-NEXT:    s_wqm_b64 s[8:9], s[0:1]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[8:9]
+; GFX9-NEXT:  ; %bb.3: ; %.continue0.preheader
+; GFX9-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX9-NEXT:    s_pack_ll_b32_b16 s2, s3, 0
+; GFX9-NEXT:    s_pack_ll_b32_b16 s3, 0, s3
+; GFX9-NEXT:    s_mov_b64 s[4:5], 0
+; GFX9-NEXT:    v_mov_b32_e32 v0, s6
+; GFX9-NEXT:    s_branch BB7_5
+; GFX9-NEXT:  BB7_4: ; %.continue1
+; GFX9-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX9-NEXT:    s_or_b64 exec, exec, s[6:7]
+; GFX9-NEXT:    v_add_u32_e32 v0, 1, v0
+; GFX9-NEXT:    v_cmp_ge_i32_e32 vcc, v0, v1
+; GFX9-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
+; GFX9-NEXT:    s_andn2_b64 exec, exec, s[4:5]
+; GFX9-NEXT:    s_cbranch_execz BB7_8
+; GFX9-NEXT:  BB7_5: ; %.continue0
+; GFX9-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GFX9-NEXT:    s_mov_b64 s[6:7], s[0:1]
+; GFX9-NEXT:    v_cndmask_b32_e64 v2, v0, 0, s[6:7]
+; GFX9-NEXT:    v_mov_b32_e32 v3, v2
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[8:9], 0, 1
+; GFX9-NEXT:    s_nop 0
+; GFX9-NEXT:    v_mov_b32_dpp v3, v3 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX9-NEXT:    s_nop 1
+; GFX9-NEXT:    v_subrev_f32_dpp v2, v2, v3 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX9-NEXT:    ; kill: def $vgpr2 killed $vgpr2 killed $exec
+; GFX9-NEXT:    v_cmp_eq_f32_e32 vcc, 0, v2
+; GFX9-NEXT:    s_and_b64 s[6:7], s[0:1], vcc
+; GFX9-NEXT:    s_xor_b64 s[6:7], s[6:7], s[8:9]
+; GFX9-NEXT:    s_and_saveexec_b64 s[8:9], s[6:7]
+; GFX9-NEXT:    s_xor_b64 s[6:7], exec, s[8:9]
+; GFX9-NEXT:    s_cbranch_execz BB7_4
+; GFX9-NEXT:  ; %bb.6: ; %.demote1
+; GFX9-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX9-NEXT:    v_cmp_ne_u32_e64 s[8:9], 0, 0
+; GFX9-NEXT:    s_xor_b64 s[8:9], s[8:9], exec
+; GFX9-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[8:9]
+; GFX9-NEXT:    s_cbranch_scc0 BB7_9
+; GFX9-NEXT:  ; %bb.7: ; %.demote1
+; GFX9-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX9-NEXT:    s_wqm_b64 s[8:9], s[0:1]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[8:9]
+; GFX9-NEXT:    s_branch BB7_4
+; GFX9-NEXT:  BB7_8: ; %.return
+; GFX9-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX9-NEXT:    v_mov_b32_e32 v0, s2
+; GFX9-NEXT:    v_mov_b32_e32 v1, s3
+; GFX9-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB7_9:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-32-LABEL: wqm_deriv_loop:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 s0, exec_lo
+; GFX10-32-NEXT:    s_wqm_b32 exec_lo, exec_lo
+; GFX10-32-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-32-NEXT:    s_movk_i32 s2, 0x3c00
+; GFX10-32-NEXT:    s_mov_b32 s1, 0
+; GFX10-32-NEXT:    v_cmp_ne_u32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_and_saveexec_b32 s3, vcc_lo
+; GFX10-32-NEXT:    s_xor_b32 s3, exec_lo, s3
+; GFX10-32-NEXT:  ; %bb.1: ; %.demote0
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s4, 0, 0
+; GFX10-32-NEXT:    s_xor_b32 s4, s4, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s0, s0, s4
+; GFX10-32-NEXT:    s_cbranch_scc0 BB7_9
+; GFX10-32-NEXT:  ; %bb.2: ; %.demote0
+; GFX10-32-NEXT:    s_wqm_b32 s4, s0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s4
+; GFX10-32-NEXT:  ; %bb.3: ; %.continue0.preheader
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s3
+; GFX10-32-NEXT:    v_mov_b32_e32 v0, s1
+; GFX10-32-NEXT:    s_pack_ll_b32_b16 s3, s2, 0
+; GFX10-32-NEXT:    s_pack_ll_b32_b16 s2, 0, s2
+; GFX10-32-NEXT:    s_branch BB7_5
+; GFX10-32-NEXT:  BB7_4: ; %.continue1
+; GFX10-32-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s4
+; GFX10-32-NEXT:    v_add_nc_u32_e32 v0, 1, v0
+; GFX10-32-NEXT:    v_cmp_ge_i32_e32 vcc_lo, v0, v1
+; GFX10-32-NEXT:    s_or_b32 s1, vcc_lo, s1
+; GFX10-32-NEXT:    s_andn2_b32 exec_lo, exec_lo, s1
+; GFX10-32-NEXT:    s_cbranch_execz BB7_8
+; GFX10-32-NEXT:  BB7_5: ; %.continue0
+; GFX10-32-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GFX10-32-NEXT:    s_mov_b32 s4, s0
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s5, 0, 1
+; GFX10-32-NEXT:    v_cndmask_b32_e64 v2, v0, 0, s4
+; GFX10-32-NEXT:    v_mov_b32_e32 v3, v2
+; GFX10-32-NEXT:    v_mov_b32_dpp v3, v3 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-32-NEXT:    v_subrev_f32_dpp v2, v2, v3 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-32-NEXT:    ; kill: def $vgpr2 killed $vgpr2 killed $exec
+; GFX10-32-NEXT:    v_cmp_eq_f32_e32 vcc_lo, 0, v2
+; GFX10-32-NEXT:    s_and_b32 s4, s0, vcc_lo
+; GFX10-32-NEXT:    s_xor_b32 s4, s4, s5
+; GFX10-32-NEXT:    s_and_saveexec_b32 s5, s4
+; GFX10-32-NEXT:    s_xor_b32 s4, exec_lo, s5
+; GFX10-32-NEXT:    s_cbranch_execz BB7_4
+; GFX10-32-NEXT:  ; %bb.6: ; %.demote1
+; GFX10-32-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-32-NEXT:    v_cmp_ne_u32_e64 s5, 0, 0
+; GFX10-32-NEXT:    s_xor_b32 s5, s5, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s0, s0, s5
+; GFX10-32-NEXT:    s_cbranch_scc0 BB7_9
+; GFX10-32-NEXT:  ; %bb.7: ; %.demote1
+; GFX10-32-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-32-NEXT:    s_wqm_b32 s5, s0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s5
+; GFX10-32-NEXT:    s_branch BB7_4
+; GFX10-32-NEXT:  BB7_8: ; %.return
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s1
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s0
+; GFX10-32-NEXT:    v_mov_b32_e32 v0, s3
+; GFX10-32-NEXT:    v_mov_b32_e32 v1, s2
+; GFX10-32-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB7_9:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+;
+; GFX10-64-LABEL: wqm_deriv_loop:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 s[0:1], exec
+; GFX10-64-NEXT:    s_wqm_b64 exec, exec
+; GFX10-64-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-64-NEXT:    s_movk_i32 s2, 0x3c00
+; GFX10-64-NEXT:    s_mov_b32 s3, 0
+; GFX10-64-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[4:5], vcc
+; GFX10-64-NEXT:    s_xor_b64 s[4:5], exec, s[4:5]
+; GFX10-64-NEXT:  ; %bb.1: ; %.demote0
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[6:7], 0, 0
+; GFX10-64-NEXT:    s_xor_b64 s[6:7], s[6:7], exec
+; GFX10-64-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[6:7]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB7_9
+; GFX10-64-NEXT:  ; %bb.2: ; %.demote0
+; GFX10-64-NEXT:    s_wqm_b64 s[6:7], s[0:1]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[6:7]
+; GFX10-64-NEXT:  ; %bb.3: ; %.continue0.preheader
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX10-64-NEXT:    v_mov_b32_e32 v0, s3
+; GFX10-64-NEXT:    s_pack_ll_b32_b16 s3, s2, 0
+; GFX10-64-NEXT:    s_pack_ll_b32_b16 s2, 0, s2
+; GFX10-64-NEXT:    s_mov_b64 s[4:5], 0
+; GFX10-64-NEXT:    s_branch BB7_5
+; GFX10-64-NEXT:  BB7_4: ; %.continue1
+; GFX10-64-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[6:7]
+; GFX10-64-NEXT:    v_add_nc_u32_e32 v0, 1, v0
+; GFX10-64-NEXT:    v_cmp_ge_i32_e32 vcc, v0, v1
+; GFX10-64-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
+; GFX10-64-NEXT:    s_andn2_b64 exec, exec, s[4:5]
+; GFX10-64-NEXT:    s_cbranch_execz BB7_8
+; GFX10-64-NEXT:  BB7_5: ; %.continue0
+; GFX10-64-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GFX10-64-NEXT:    s_mov_b64 s[6:7], s[0:1]
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[8:9], 0, 1
+; GFX10-64-NEXT:    v_cndmask_b32_e64 v2, v0, 0, s[6:7]
+; GFX10-64-NEXT:    v_mov_b32_e32 v3, v2
+; GFX10-64-NEXT:    v_mov_b32_dpp v3, v3 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-64-NEXT:    v_subrev_f32_dpp v2, v2, v3 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-64-NEXT:    ; kill: def $vgpr2 killed $vgpr2 killed $exec
+; GFX10-64-NEXT:    v_cmp_eq_f32_e32 vcc, 0, v2
+; GFX10-64-NEXT:    s_and_b64 s[6:7], s[0:1], vcc
+; GFX10-64-NEXT:    s_xor_b64 s[6:7], s[6:7], s[8:9]
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[8:9], s[6:7]
+; GFX10-64-NEXT:    s_xor_b64 s[6:7], exec, s[8:9]
+; GFX10-64-NEXT:    s_cbranch_execz BB7_4
+; GFX10-64-NEXT:  ; %bb.6: ; %.demote1
+; GFX10-64-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-64-NEXT:    v_cmp_ne_u32_e64 s[8:9], 0, 0
+; GFX10-64-NEXT:    s_xor_b64 s[8:9], s[8:9], exec
+; GFX10-64-NEXT:    s_andn2_b64 s[0:1], s[0:1], s[8:9]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB7_9
+; GFX10-64-NEXT:  ; %bb.7: ; %.demote1
+; GFX10-64-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-64-NEXT:    s_wqm_b64 s[8:9], s[0:1]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[8:9]
+; GFX10-64-NEXT:    s_branch BB7_4
+; GFX10-64-NEXT:  BB7_8: ; %.return
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX10-64-NEXT:    v_mov_b32_e32 v0, s3
+; GFX10-64-NEXT:    v_mov_b32_e32 v1, s2
+; GFX10-64-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB7_9:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+.entry:
+  %p0 = extractelement <2 x float> %input, i32 0
+  %p1 = extractelement <2 x float> %input, i32 1
+  %x0 = call float @llvm.amdgcn.interp.p1(float %p0, i32 immarg 0, i32 immarg 0, i32 %index) #2
+  %x1 = call float @llvm.amdgcn.interp.p2(float %x0, float %p1, i32 immarg 0, i32 immarg 0, i32 %index) #2
+  %argi = fptosi float %arg to i32
+  %cond0 = icmp eq i32 %argi, 0
+  br i1 %cond0, label %.continue0, label %.demote0
+
+.demote0:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue0
+
+.continue0:
+  %count = phi i32 [ 0, %.entry ], [ 0, %.demote0 ], [ %next, %.continue1 ]
+  %live = call i1 @llvm.amdgcn.live.mask()
+  %live.cond = select i1 %live, i32 0, i32 %count
+  %live.v0 = call i32 @llvm.amdgcn.mov.dpp.i32(i32 %live.cond, i32 85, i32 15, i32 15, i1 true)
+  %live.v0f = bitcast i32 %live.v0 to float
+  %live.v1 = call i32 @llvm.amdgcn.mov.dpp.i32(i32 %live.cond, i32 0, i32 15, i32 15, i1 true)
+  %live.v1f = bitcast i32 %live.v1 to float
+  %v0 = fsub float %live.v0f, %live.v1f
+  %v0.wqm = call float @llvm.amdgcn.wqm.f32(float %v0)
+  %cond1 = fcmp oeq float %v0.wqm, 0.000000e+00
+  %cond2 = and i1 %live, %cond1
+  br i1 %cond2, label %.continue1, label %.demote1
+
+.demote1:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue1
+
+.continue1:
+  %next = add i32 %count, 1
+  %loop.cond = icmp slt i32 %next, %limit
+  br i1 %loop.cond, label %.continue0, label %.return
+
+.return:
+  call void @llvm.amdgcn.exp.compr.v2f16(i32 immarg 0, i32 immarg 15, <2 x half> <half 0xH3C00, half 0xH0000>, <2 x half> <half 0xH0000, half 0xH3C00>, i1 immarg true, i1 immarg true) #3
+  ret void
+}
+
+declare void @llvm.amdgcn.wqm.demote(i1) #0
+declare i1 @llvm.amdgcn.live.mask() #0
+declare void @llvm.amdgcn.exp.f32(i32, i32, float, float, float, float, i1, i1) #0
+declare <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32, float, <8 x i32>, <4 x i32>, i1, i32, i32) #1
+declare float @llvm.amdgcn.wqm.f32(float) #1
+declare float @llvm.amdgcn.interp.p1(float, i32 immarg, i32 immarg, i32) #2
+declare float @llvm.amdgcn.interp.p2(float, float, i32 immarg, i32 immarg, i32) #2
+declare void @llvm.amdgcn.exp.compr.v2f16(i32 immarg, i32 immarg, <2 x half>, <2 x half>, i1 immarg, i1 immarg) #3
+declare i32 @llvm.amdgcn.mov.dpp.i32(i32, i32 immarg, i32 immarg, i32 immarg, i1 immarg) #4
+
+attributes #0 = { nounwind }
+attributes #1 = { nounwind readnone }
+attributes #2 = { nounwind readnone speculatable }
+attributes #3 = { inaccessiblememonly nounwind }
+attributes #4 = { convergent nounwind readnone }

llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-amdgcn.live.mask.mir

+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=amdgcn -mcpu=fiji -run-pass=regbankselect -regbankselect-fast -verify-machineinstrs -o - %s | FileCheck %s
+# RUN: llc -march=amdgcn -mcpu=fiji -run-pass=regbankselect -regbankselect-greedy -verify-machineinstrs -o - %s | FileCheck %s
+
+---
+name: live_mask
+legalized: true
+
+body: |
+  bb.0:
+    ; CHECK-LABEL: name: live_mask
+    ; CHECK: [[INT:%[0-9]+]]:vcc(s1) = G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.amdgcn.live.mask)
+    ; CHECK: S_ENDPGM 0, implicit [[INT]](s1)
+    %0:_(s1) = G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.amdgcn.live.mask)
+    S_ENDPGM 0, implicit %0
+...

llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-amdgcn.wqm.demote.mir

+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=amdgcn -mcpu=fiji -run-pass=regbankselect -regbankselect-fast -verify-machineinstrs -o -  %s| FileCheck %s
+# RUN: llc -march=amdgcn -mcpu=fiji -run-pass=regbankselect -regbankselect-greedy -verify-machineinstrs -o -  %s| FileCheck %s
+
+---
+name: wqm_demote_scc
+legalized: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $sgpr1
+    ; CHECK-LABEL: name: wqm_demote_scc
+    ; CHECK: [[COPY:%[0-9]+]]:sgpr(s32) = COPY $sgpr0
+    ; CHECK: [[COPY1:%[0-9]+]]:sgpr(s32) = COPY $sgpr1
+    ; CHECK: [[ICMP:%[0-9]+]]:sgpr(s32) = G_ICMP intpred(eq), [[COPY]](s32), [[COPY1]]
+    ; CHECK: [[TRUNC:%[0-9]+]]:sgpr(s1) = G_TRUNC [[ICMP]](s32)
+    ; CHECK: [[COPY2:%[0-9]+]]:vcc(s1) = COPY [[TRUNC]](s1)
+    ; CHECK: G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.amdgcn.wqm.demote), [[COPY2]](s1)
+    %0:_(s32) = COPY $sgpr0
+    %1:_(s32) = COPY $sgpr1
+    %2:_(s1) = G_ICMP intpred(eq), %0, %1
+    G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.amdgcn.wqm.demote), %2
+...
+
+---
+name: wqm_demote_vcc
+legalized: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+    ; CHECK-LABEL: name: wqm_demote_vcc
+    ; CHECK: [[COPY:%[0-9]+]]:vgpr(s32) = COPY $vgpr0
+    ; CHECK: [[COPY1:%[0-9]+]]:vgpr(s32) = COPY $vgpr1
+    ; CHECK: [[ICMP:%[0-9]+]]:vcc(s1) = G_ICMP intpred(eq), [[COPY]](s32), [[COPY1]]
+    ; CHECK: G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.amdgcn.wqm.demote), [[ICMP]](s1)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s1) = G_ICMP intpred(eq), %0, %1
+    G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.amdgcn.wqm.demote), %2
+...
+
+---
+name: wqm_demote_constant_true
+legalized: true
+
+body: |
+  bb.0:
+    ; CHECK-LABEL: name: wqm_demote_constant_true
+    ; CHECK: [[C:%[0-9]+]]:sgpr(s1) = G_CONSTANT i1 true
+    ; CHECK: [[COPY:%[0-9]+]]:vcc(s1) = COPY [[C]](s1)
+    ; CHECK: G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.amdgcn.wqm.demote), [[COPY]](s1)
+    %0:_(s1) = G_CONSTANT i1 true
+    G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.amdgcn.wqm.demote), %0
+...
+
+---
+name: wqm_demote_constant_false
+legalized: true
+
+body: |
+  bb.0:
+    ; CHECK-LABEL: name: wqm_demote_constant_false
+    ; CHECK: [[C:%[0-9]+]]:sgpr(s1) = G_CONSTANT i1 false
+    ; CHECK: [[COPY:%[0-9]+]]:vcc(s1) = COPY [[C]](s1)
+    ; CHECK: G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.amdgcn.wqm.demote), [[COPY]](s1)
+    %0:_(s1) = G_CONSTANT i1 false
+    G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.amdgcn.wqm.demote), %0
+...

llvm/test/CodeGen/AMDGPU/llvm.amdgcn.wqm.demote.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
+; RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GFX9 %s
+; RUN: llc -march=amdgcn -mcpu=gfx1010 -mattr=+wavefrontsize32,-wavefrontsize64 -verify-machineinstrs < %s | FileCheck -check-prefixes=GFX10-32 %s
+; RUN: llc -march=amdgcn -mcpu=gfx1010 -mattr=-wavefrontsize32,+wavefrontsize64 -verify-machineinstrs < %s | FileCheck -check-prefixes=GFX10-64 %s
+
+define amdgpu_ps void @static_exact(float %arg0, float %arg1) {
+; SI-LABEL: static_exact:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_andn2_b64 exec, exec, exec
+; SI-NEXT:    s_cbranch_scc0 BB0_2
+; SI-NEXT:  ; %bb.1: ; %.entry
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; SI-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB0_2:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+;
+; GFX9-LABEL: static_exact:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_andn2_b64 exec, exec, exec
+; GFX9-NEXT:    s_cbranch_scc0 BB0_2
+; GFX9-NEXT:  ; %bb.1: ; %.entry
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX9-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB0_2:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-32-LABEL: static_exact:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    v_cmp_gt_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_andn2_b32 exec_lo, exec_lo, exec_lo
+; GFX10-32-NEXT:    s_cbranch_scc0 BB0_2
+; GFX10-32-NEXT:  ; %bb.1: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc_lo
+; GFX10-32-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB0_2:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+;
+; GFX10-64-LABEL: static_exact:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_andn2_b64 exec, exec, exec
+; GFX10-64-NEXT:    s_cbranch_scc0 BB0_2
+; GFX10-64-NEXT:  ; %bb.1: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX10-64-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB0_2:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+.entry:
+  %c0 = fcmp olt float %arg0, 0.000000e+00
+  %c1 = fcmp oge float %arg1, 0.0
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  %tmp1 = select i1 %c0, float 1.000000e+00, float 0.000000e+00
+  call void @llvm.amdgcn.exp.f32(i32 1, i32 15, float %tmp1, float %tmp1, float %tmp1, float %tmp1, i1 true, i1 true) #0
+  ret void
+}
+
+define amdgpu_ps void @dynamic_exact(float %arg0, float %arg1) {
+; SI-LABEL: dynamic_exact:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    v_cmp_le_f32_e64 s[0:1], 0, v1
+; SI-NEXT:    s_mov_b64 s[2:3], exec
+; SI-NEXT:    s_xor_b64 s[0:1], s[0:1], exec
+; SI-NEXT:    s_andn2_b64 s[2:3], s[2:3], s[0:1]
+; SI-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_cbranch_scc0 BB1_2
+; SI-NEXT:  ; %bb.1: ; %.entry
+; SI-NEXT:    s_and_b64 exec, exec, s[2:3]
+; SI-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; SI-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB1_2:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+;
+; GFX9-LABEL: dynamic_exact:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    v_cmp_le_f32_e64 s[0:1], 0, v1
+; GFX9-NEXT:    s_mov_b64 s[2:3], exec
+; GFX9-NEXT:    s_xor_b64 s[0:1], s[0:1], exec
+; GFX9-NEXT:    s_andn2_b64 s[2:3], s[2:3], s[0:1]
+; GFX9-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_cbranch_scc0 BB1_2
+; GFX9-NEXT:  ; %bb.1: ; %.entry
+; GFX9-NEXT:    s_and_b64 exec, exec, s[2:3]
+; GFX9-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX9-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB1_2:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-32-LABEL: dynamic_exact:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    v_cmp_le_f32_e64 s0, 0, v1
+; GFX10-32-NEXT:    s_mov_b32 s1, exec_lo
+; GFX10-32-NEXT:    v_cmp_gt_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_xor_b32 s0, s0, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s1, s1, s0
+; GFX10-32-NEXT:    s_cbranch_scc0 BB1_2
+; GFX10-32-NEXT:  ; %bb.1: ; %.entry
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s1
+; GFX10-32-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc_lo
+; GFX10-32-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB1_2:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+;
+; GFX10-64-LABEL: dynamic_exact:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    v_cmp_le_f32_e64 s[0:1], 0, v1
+; GFX10-64-NEXT:    s_mov_b64 s[2:3], exec
+; GFX10-64-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_xor_b64 s[0:1], s[0:1], exec
+; GFX10-64-NEXT:    s_andn2_b64 s[2:3], s[2:3], s[0:1]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB1_2
+; GFX10-64-NEXT:  ; %bb.1: ; %.entry
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[2:3]
+; GFX10-64-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX10-64-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB1_2:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+.entry:
+  %c0 = fcmp olt float %arg0, 0.000000e+00
+  %c1 = fcmp oge float %arg1, 0.0
+  call void @llvm.amdgcn.wqm.demote(i1 %c1)
+  %tmp1 = select i1 %c0, float 1.000000e+00, float 0.000000e+00
+  call void @llvm.amdgcn.exp.f32(i32 1, i32 15, float %tmp1, float %tmp1, float %tmp1, float %tmp1, i1 true, i1 true) #0
+  ret void
+}
+
+define amdgpu_ps void @branch(float %arg0, float %arg1) {
+; SI-LABEL: branch:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; SI-NEXT:    v_cvt_i32_f32_e32 v1, v1
+; SI-NEXT:    s_mov_b64 s[2:3], exec
+; SI-NEXT:    v_or_b32_e32 v0, v0, v1
+; SI-NEXT:    v_and_b32_e32 v1, 1, v0
+; SI-NEXT:    v_and_b32_e32 v0, 1, v0
+; SI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
+; SI-NEXT:    v_cmp_eq_u32_e64 s[0:1], 1, v0
+; SI-NEXT:    s_and_saveexec_b64 s[4:5], s[0:1]
+; SI-NEXT:    s_xor_b64 s[0:1], exec, s[4:5]
+; SI-NEXT:  ; %bb.1: ; %.demote
+; SI-NEXT:    s_andn2_b64 s[2:3], s[2:3], exec
+; SI-NEXT:    s_cbranch_scc0 BB2_4
+; SI-NEXT:  ; %bb.2: ; %.demote
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:  ; %bb.3: ; %.continue
+; SI-NEXT:    s_or_b64 exec, exec, s[0:1]
+; SI-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; SI-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB2_4:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+;
+; GFX9-LABEL: branch:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX9-NEXT:    v_cvt_i32_f32_e32 v1, v1
+; GFX9-NEXT:    s_mov_b64 s[2:3], exec
+; GFX9-NEXT:    v_or_b32_e32 v0, v0, v1
+; GFX9-NEXT:    v_and_b32_e32 v1, 1, v0
+; GFX9-NEXT:    v_and_b32_e32 v0, 1, v0
+; GFX9-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
+; GFX9-NEXT:    v_cmp_eq_u32_e64 s[0:1], 1, v0
+; GFX9-NEXT:    s_and_saveexec_b64 s[4:5], s[0:1]
+; GFX9-NEXT:    s_xor_b64 s[0:1], exec, s[4:5]
+; GFX9-NEXT:  ; %bb.1: ; %.demote
+; GFX9-NEXT:    s_andn2_b64 s[2:3], s[2:3], exec
+; GFX9-NEXT:    s_cbranch_scc0 BB2_4
+; GFX9-NEXT:  ; %bb.2: ; %.demote
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:  ; %bb.3: ; %.continue
+; GFX9-NEXT:    s_or_b64 exec, exec, s[0:1]
+; GFX9-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX9-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB2_4:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-32-LABEL: branch:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-32-NEXT:    v_cvt_i32_f32_e32 v1, v1
+; GFX10-32-NEXT:    s_mov_b32 s1, exec_lo
+; GFX10-32-NEXT:    v_or_b32_e32 v0, v0, v1
+; GFX10-32-NEXT:    v_and_b32_e32 v1, 1, v0
+; GFX10-32-NEXT:    v_and_b32_e32 v0, 1, v0
+; GFX10-32-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 0, v1
+; GFX10-32-NEXT:    v_cmp_eq_u32_e64 s0, 1, v0
+; GFX10-32-NEXT:    s_and_saveexec_b32 s2, s0
+; GFX10-32-NEXT:    s_xor_b32 s0, exec_lo, s2
+; GFX10-32-NEXT:  ; %bb.1: ; %.demote
+; GFX10-32-NEXT:    s_andn2_b32 s1, s1, exec_lo
+; GFX10-32-NEXT:    s_cbranch_scc0 BB2_4
+; GFX10-32-NEXT:  ; %bb.2: ; %.demote
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:  ; %bb.3: ; %.continue
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s0
+; GFX10-32-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc_lo
+; GFX10-32-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB2_4:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+;
+; GFX10-64-LABEL: branch:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-64-NEXT:    v_cvt_i32_f32_e32 v1, v1
+; GFX10-64-NEXT:    s_mov_b64 s[2:3], exec
+; GFX10-64-NEXT:    v_or_b32_e32 v0, v0, v1
+; GFX10-64-NEXT:    v_and_b32_e32 v1, 1, v0
+; GFX10-64-NEXT:    v_and_b32_e32 v0, 1, v0
+; GFX10-64-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
+; GFX10-64-NEXT:    v_cmp_eq_u32_e64 s[0:1], 1, v0
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[4:5], s[0:1]
+; GFX10-64-NEXT:    s_xor_b64 s[0:1], exec, s[4:5]
+; GFX10-64-NEXT:  ; %bb.1: ; %.demote
+; GFX10-64-NEXT:    s_andn2_b64 s[2:3], s[2:3], exec
+; GFX10-64-NEXT:    s_cbranch_scc0 BB2_4
+; GFX10-64-NEXT:  ; %bb.2: ; %.demote
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:  ; %bb.3: ; %.continue
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[0:1]
+; GFX10-64-NEXT:    v_cndmask_b32_e64 v0, 0, 1.0, vcc
+; GFX10-64-NEXT:    exp mrt1 v0, v0, v0, v0 done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB2_4:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+.entry:
+  %i0 = fptosi float %arg0 to i32
+  %i1 = fptosi float %arg1 to i32
+  %c0 = or i32 %i0, %i1
+  %c1 = and i32 %c0, 1
+  %c2 = icmp eq i32 %c1, 0
+  br i1 %c2, label %.continue, label %.demote
+
+.demote:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue
+
+.continue:
+  %tmp1 = select i1 %c2, float 1.000000e+00, float 0.000000e+00
+  call void @llvm.amdgcn.exp.f32(i32 1, i32 15, float %tmp1, float %tmp1, float %tmp1, float %tmp1, i1 true, i1 true) #0
+  ret void
+}
+
+
+define amdgpu_ps <4 x float> @wqm_demote_1(<8 x i32> inreg %rsrc, <4 x i32> inreg %sampler, i32 %idx, float %data, float %coord, float %coord2, float %z) {
+; SI-LABEL: wqm_demote_1:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    s_mov_b64 s[12:13], exec
+; SI-NEXT:    s_wqm_b64 exec, exec
+; SI-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v1
+; SI-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; SI-NEXT:    s_xor_b64 s[14:15], exec, s[14:15]
+; SI-NEXT:  ; %bb.1: ; %.demote
+; SI-NEXT:    s_andn2_b64 s[12:13], s[12:13], exec
+; SI-NEXT:    s_cbranch_scc0 BB3_4
+; SI-NEXT:  ; %bb.2: ; %.demote
+; SI-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; SI-NEXT:    s_and_b64 exec, exec, s[16:17]
+; SI-NEXT:  ; %bb.3: ; %.continue
+; SI-NEXT:    s_or_b64 exec, exec, s[14:15]
+; SI-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    v_add_f32_e32 v0, v0, v0
+; SI-NEXT:    s_and_b64 exec, exec, s[12:13]
+; SI-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    s_branch BB3_5
+; SI-NEXT:  BB3_4:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB3_5:
+;
+; GFX9-LABEL: wqm_demote_1:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    s_mov_b64 s[12:13], exec
+; GFX9-NEXT:    s_wqm_b64 exec, exec
+; GFX9-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v1
+; GFX9-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; GFX9-NEXT:    s_xor_b64 s[14:15], exec, s[14:15]
+; GFX9-NEXT:  ; %bb.1: ; %.demote
+; GFX9-NEXT:    s_andn2_b64 s[12:13], s[12:13], exec
+; GFX9-NEXT:    s_cbranch_scc0 BB3_4
+; GFX9-NEXT:  ; %bb.2: ; %.demote
+; GFX9-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[16:17]
+; GFX9-NEXT:  ; %bb.3: ; %.continue
+; GFX9-NEXT:    s_or_b64 exec, exec, s[14:15]
+; GFX9-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX9-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX9-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    s_branch BB3_5
+; GFX9-NEXT:  BB3_4:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB3_5:
+;
+; GFX10-32-LABEL: wqm_demote_1:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 s12, exec_lo
+; GFX10-32-NEXT:    s_wqm_b32 exec_lo, exec_lo
+; GFX10-32-NEXT:    v_cmp_ngt_f32_e32 vcc_lo, 0, v1
+; GFX10-32-NEXT:    s_and_saveexec_b32 s13, vcc_lo
+; GFX10-32-NEXT:    s_xor_b32 s13, exec_lo, s13
+; GFX10-32-NEXT:  ; %bb.1: ; %.demote
+; GFX10-32-NEXT:    s_andn2_b32 s12, s12, exec_lo
+; GFX10-32-NEXT:    s_cbranch_scc0 BB3_4
+; GFX10-32-NEXT:  ; %bb.2: ; %.demote
+; GFX10-32-NEXT:    s_wqm_b32 s28, s12
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s28
+; GFX10-32-NEXT:  ; %bb.3: ; %.continue
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s13
+; GFX10-32-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1 dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s12
+; GFX10-32-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    s_branch BB3_5
+; GFX10-32-NEXT:  BB3_4:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB3_5:
+;
+; GFX10-64-LABEL: wqm_demote_1:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 s[12:13], exec
+; GFX10-64-NEXT:    s_wqm_b64 exec, exec
+; GFX10-64-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v1
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; GFX10-64-NEXT:    s_xor_b64 s[28:29], exec, s[14:15]
+; GFX10-64-NEXT:  ; %bb.1: ; %.demote
+; GFX10-64-NEXT:    s_andn2_b64 s[12:13], s[12:13], exec
+; GFX10-64-NEXT:    s_cbranch_scc0 BB3_4
+; GFX10-64-NEXT:  ; %bb.2: ; %.demote
+; GFX10-64-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[16:17]
+; GFX10-64-NEXT:  ; %bb.3: ; %.continue
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[28:29]
+; GFX10-64-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1 dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX10-64-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    s_branch BB3_5
+; GFX10-64-NEXT:  BB3_4:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB3_5:
+.entry:
+  %z.cmp = fcmp olt float %z, 0.0
+  br i1 %z.cmp, label %.continue, label %.demote
+
+.demote:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue
+
+.continue:
+  %tex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+  %tex0 = extractelement <4 x float> %tex, i32 0
+  %tex1 = extractelement <4 x float> %tex, i32 0
+  %coord1 = fadd float %tex0, %tex1
+  %rtex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord1, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+
+  ret <4 x float> %rtex
+}
+
+define amdgpu_ps <4 x float> @wqm_demote_2(<8 x i32> inreg %rsrc, <4 x i32> inreg %sampler, i32 %idx, float %data, float %coord, float %coord2, float %z) {
+; SI-LABEL: wqm_demote_2:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    s_mov_b64 s[12:13], exec
+; SI-NEXT:    s_wqm_b64 exec, exec
+; SI-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; SI-NEXT:    s_xor_b64 s[14:15], exec, s[14:15]
+; SI-NEXT:  ; %bb.1: ; %.demote
+; SI-NEXT:    s_andn2_b64 s[12:13], s[12:13], exec
+; SI-NEXT:    s_cbranch_scc0 BB4_4
+; SI-NEXT:  ; %bb.2: ; %.demote
+; SI-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; SI-NEXT:    s_and_b64 exec, exec, s[16:17]
+; SI-NEXT:  ; %bb.3: ; %.continue
+; SI-NEXT:    s_or_b64 exec, exec, s[14:15]
+; SI-NEXT:    v_add_f32_e32 v0, v0, v0
+; SI-NEXT:    s_and_b64 exec, exec, s[12:13]
+; SI-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    s_branch BB4_5
+; SI-NEXT:  BB4_4:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB4_5:
+;
+; GFX9-LABEL: wqm_demote_2:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    s_mov_b64 s[12:13], exec
+; GFX9-NEXT:    s_wqm_b64 exec, exec
+; GFX9-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; GFX9-NEXT:    s_xor_b64 s[14:15], exec, s[14:15]
+; GFX9-NEXT:  ; %bb.1: ; %.demote
+; GFX9-NEXT:    s_andn2_b64 s[12:13], s[12:13], exec
+; GFX9-NEXT:    s_cbranch_scc0 BB4_4
+; GFX9-NEXT:  ; %bb.2: ; %.demote
+; GFX9-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[16:17]
+; GFX9-NEXT:  ; %bb.3: ; %.continue
+; GFX9-NEXT:    s_or_b64 exec, exec, s[14:15]
+; GFX9-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX9-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX9-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    s_branch BB4_5
+; GFX9-NEXT:  BB4_4:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB4_5:
+;
+; GFX10-32-LABEL: wqm_demote_2:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 s12, exec_lo
+; GFX10-32-NEXT:    s_wqm_b32 exec_lo, exec_lo
+; GFX10-32-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1 dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    v_cmp_ngt_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_and_saveexec_b32 s13, vcc_lo
+; GFX10-32-NEXT:    s_xor_b32 s13, exec_lo, s13
+; GFX10-32-NEXT:  ; %bb.1: ; %.demote
+; GFX10-32-NEXT:    s_andn2_b32 s12, s12, exec_lo
+; GFX10-32-NEXT:    s_cbranch_scc0 BB4_4
+; GFX10-32-NEXT:  ; %bb.2: ; %.demote
+; GFX10-32-NEXT:    s_wqm_b32 s28, s12
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s28
+; GFX10-32-NEXT:  ; %bb.3: ; %.continue
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s13
+; GFX10-32-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s12
+; GFX10-32-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    s_branch BB4_5
+; GFX10-32-NEXT:  BB4_4:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB4_5:
+;
+; GFX10-64-LABEL: wqm_demote_2:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 s[12:13], exec
+; GFX10-64-NEXT:    s_wqm_b64 exec, exec
+; GFX10-64-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1 dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    v_cmp_ngt_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[14:15], vcc
+; GFX10-64-NEXT:    s_xor_b64 s[28:29], exec, s[14:15]
+; GFX10-64-NEXT:  ; %bb.1: ; %.demote
+; GFX10-64-NEXT:    s_andn2_b64 s[12:13], s[12:13], exec
+; GFX10-64-NEXT:    s_cbranch_scc0 BB4_4
+; GFX10-64-NEXT:  ; %bb.2: ; %.demote
+; GFX10-64-NEXT:    s_wqm_b64 s[16:17], s[12:13]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[16:17]
+; GFX10-64-NEXT:  ; %bb.3: ; %.continue
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[28:29]
+; GFX10-64-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX10-64-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    s_branch BB4_5
+; GFX10-64-NEXT:  BB4_4:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB4_5:
+.entry:
+  %tex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+  %tex0 = extractelement <4 x float> %tex, i32 0
+  %tex1 = extractelement <4 x float> %tex, i32 0
+  %z.cmp = fcmp olt float %tex0, 0.0
+  br i1 %z.cmp, label %.continue, label %.demote
+
+.demote:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue
+
+.continue:
+  %coord1 = fadd float %tex0, %tex1
+  %rtex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord1, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+
+  ret <4 x float> %rtex
+}
+
+define amdgpu_ps <4 x float> @wqm_demote_dynamic(<8 x i32> inreg %rsrc, <4 x i32> inreg %sampler, i32 %idx, float %data, float %coord, float %coord2, float %z) {
+; SI-LABEL: wqm_demote_dynamic:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    s_mov_b64 s[12:13], exec
+; SI-NEXT:    s_wqm_b64 exec, exec
+; SI-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_xor_b64 s[14:15], vcc, exec
+; SI-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[14:15]
+; SI-NEXT:    s_cbranch_scc0 BB5_2
+; SI-NEXT:  ; %bb.1: ; %.entry
+; SI-NEXT:    s_wqm_b64 s[14:15], s[12:13]
+; SI-NEXT:    s_and_b64 exec, exec, s[14:15]
+; SI-NEXT:    v_add_f32_e32 v0, v0, v0
+; SI-NEXT:    s_and_b64 exec, exec, s[12:13]
+; SI-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; SI-NEXT:    s_waitcnt vmcnt(0)
+; SI-NEXT:    s_branch BB5_3
+; SI-NEXT:  BB5_2:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB5_3:
+;
+; GFX9-LABEL: wqm_demote_dynamic:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    s_mov_b64 s[12:13], exec
+; GFX9-NEXT:    s_wqm_b64 exec, exec
+; GFX9-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_xor_b64 s[14:15], vcc, exec
+; GFX9-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[14:15]
+; GFX9-NEXT:    s_cbranch_scc0 BB5_2
+; GFX9-NEXT:  ; %bb.1: ; %.entry
+; GFX9-NEXT:    s_wqm_b64 s[14:15], s[12:13]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[14:15]
+; GFX9-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX9-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX9-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    s_branch BB5_3
+; GFX9-NEXT:  BB5_2:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB5_3:
+;
+; GFX10-32-LABEL: wqm_demote_dynamic:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 s12, exec_lo
+; GFX10-32-NEXT:    s_wqm_b32 exec_lo, exec_lo
+; GFX10-32-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1 dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    v_cmp_gt_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_xor_b32 s13, vcc_lo, exec_lo
+; GFX10-32-NEXT:    s_andn2_b32 s12, s12, s13
+; GFX10-32-NEXT:    s_cbranch_scc0 BB5_2
+; GFX10-32-NEXT:  ; %bb.1: ; %.entry
+; GFX10-32-NEXT:    s_wqm_b32 s13, s12
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s13
+; GFX10-32-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s12
+; GFX10-32-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-32-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-32-NEXT:    s_branch BB5_3
+; GFX10-32-NEXT:  BB5_2:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB5_3:
+;
+; GFX10-64-LABEL: wqm_demote_dynamic:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 s[12:13], exec
+; GFX10-64-NEXT:    s_wqm_b64 exec, exec
+; GFX10-64-NEXT:    image_sample v0, v0, s[0:7], s[8:11] dmask:0x1 dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_xor_b64 s[14:15], vcc, exec
+; GFX10-64-NEXT:    s_andn2_b64 s[12:13], s[12:13], s[14:15]
+; GFX10-64-NEXT:    s_cbranch_scc0 BB5_2
+; GFX10-64-NEXT:  ; %bb.1: ; %.entry
+; GFX10-64-NEXT:    s_wqm_b64 s[28:29], s[12:13]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[28:29]
+; GFX10-64-NEXT:    v_add_f32_e32 v0, v0, v0
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[12:13]
+; GFX10-64-NEXT:    image_sample v[0:3], v0, s[0:7], s[8:11] dmask:0xf dim:SQ_RSRC_IMG_1D
+; GFX10-64-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-64-NEXT:    s_branch BB5_3
+; GFX10-64-NEXT:  BB5_2:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB5_3:
+.entry:
+  %tex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+  %tex0 = extractelement <4 x float> %tex, i32 0
+  %tex1 = extractelement <4 x float> %tex, i32 0
+  %z.cmp = fcmp olt float %tex0, 0.0
+  call void @llvm.amdgcn.wqm.demote(i1 %z.cmp)
+  %coord1 = fadd float %tex0, %tex1
+  %rtex = call <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32 15, float %coord1, <8 x i32> %rsrc, <4 x i32> %sampler, i1 0, i32 0, i32 0) #0
+
+  ret <4 x float> %rtex
+}
+
+
+define amdgpu_ps void @wqm_deriv(<2 x float> %input, float %arg, i32 %index) {
+; SI-LABEL: wqm_deriv:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    s_mov_b64 s[0:1], exec
+; SI-NEXT:    s_wqm_b64 exec, exec
+; SI-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; SI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; SI-NEXT:    s_and_saveexec_b64 s[2:3], vcc
+; SI-NEXT:    s_xor_b64 s[2:3], exec, s[2:3]
+; SI-NEXT:  ; %bb.1: ; %.demote0
+; SI-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; SI-NEXT:    s_cbranch_scc0 BB6_7
+; SI-NEXT:  ; %bb.2: ; %.demote0
+; SI-NEXT:    s_wqm_b64 s[4:5], s[0:1]
+; SI-NEXT:    s_and_b64 exec, exec, s[4:5]
+; SI-NEXT:  ; %bb.3: ; %.continue0
+; SI-NEXT:    s_or_b64 exec, exec, s[2:3]
+; SI-NEXT:    s_mov_b64 s[2:3], s[0:1]
+; SI-NEXT:    v_cndmask_b32_e64 v0, 1.0, 0, s[2:3]
+; SI-NEXT:    v_mov_b32_e32 v1, v0
+; SI-NEXT:    s_xor_b64 s[2:3], s[0:1], -1
+; SI-NEXT:    s_nop 0
+; SI-NEXT:    v_mov_b32_dpp v1, v1 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; SI-NEXT:    s_nop 1
+; SI-NEXT:    v_subrev_f32_dpp v0, v0, v1 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; SI-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; SI-NEXT:    s_and_b64 exec, exec, s[0:1]
+; SI-NEXT:    v_cmp_neq_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_or_b64 s[2:3], s[2:3], vcc
+; SI-NEXT:    s_and_saveexec_b64 s[4:5], s[2:3]
+; SI-NEXT:    s_xor_b64 s[2:3], exec, s[4:5]
+; SI-NEXT:  ; %bb.4: ; %.demote1
+; SI-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; SI-NEXT:    s_cbranch_scc0 BB6_7
+; SI-NEXT:  ; %bb.5: ; %.demote1
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:  ; %bb.6: ; %.continue1
+; SI-NEXT:    s_or_b64 exec, exec, s[2:3]
+; SI-NEXT:    v_bfrev_b32_e32 v0, 60
+; SI-NEXT:    v_mov_b32_e32 v1, 0x3c00
+; SI-NEXT:    exp mrt0 v1, v1, v0, v0 done compr vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB6_7:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+;
+; GFX9-LABEL: wqm_deriv:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    s_mov_b64 s[0:1], exec
+; GFX9-NEXT:    s_wqm_b64 exec, exec
+; GFX9-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX9-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_and_saveexec_b64 s[2:3], vcc
+; GFX9-NEXT:    s_xor_b64 s[2:3], exec, s[2:3]
+; GFX9-NEXT:  ; %bb.1: ; %.demote0
+; GFX9-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; GFX9-NEXT:    s_cbranch_scc0 BB6_7
+; GFX9-NEXT:  ; %bb.2: ; %.demote0
+; GFX9-NEXT:    s_wqm_b64 s[4:5], s[0:1]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[4:5]
+; GFX9-NEXT:  ; %bb.3: ; %.continue0
+; GFX9-NEXT:    s_or_b64 exec, exec, s[2:3]
+; GFX9-NEXT:    s_mov_b64 s[2:3], s[0:1]
+; GFX9-NEXT:    v_cndmask_b32_e64 v0, 1.0, 0, s[2:3]
+; GFX9-NEXT:    v_mov_b32_e32 v1, v0
+; GFX9-NEXT:    s_xor_b64 s[2:3], s[0:1], -1
+; GFX9-NEXT:    s_nop 0
+; GFX9-NEXT:    v_mov_b32_dpp v1, v1 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX9-NEXT:    s_nop 1
+; GFX9-NEXT:    v_subrev_f32_dpp v0, v0, v1 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX9-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; GFX9-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX9-NEXT:    v_cmp_neq_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_or_b64 s[2:3], s[2:3], vcc
+; GFX9-NEXT:    s_and_saveexec_b64 s[4:5], s[2:3]
+; GFX9-NEXT:    s_xor_b64 s[2:3], exec, s[4:5]
+; GFX9-NEXT:  ; %bb.4: ; %.demote1
+; GFX9-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; GFX9-NEXT:    s_cbranch_scc0 BB6_7
+; GFX9-NEXT:  ; %bb.5: ; %.demote1
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:  ; %bb.6: ; %.continue1
+; GFX9-NEXT:    s_or_b64 exec, exec, s[2:3]
+; GFX9-NEXT:    v_mov_b32_e32 v0, 0x3c00
+; GFX9-NEXT:    v_bfrev_b32_e32 v1, 60
+; GFX9-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB6_7:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-32-LABEL: wqm_deriv:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 s0, exec_lo
+; GFX10-32-NEXT:    s_wqm_b32 exec_lo, exec_lo
+; GFX10-32-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-32-NEXT:    v_cmp_ne_u32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_and_saveexec_b32 s1, vcc_lo
+; GFX10-32-NEXT:    s_xor_b32 s1, exec_lo, s1
+; GFX10-32-NEXT:  ; %bb.1: ; %.demote0
+; GFX10-32-NEXT:    s_andn2_b32 s0, s0, exec_lo
+; GFX10-32-NEXT:    s_cbranch_scc0 BB6_7
+; GFX10-32-NEXT:  ; %bb.2: ; %.demote0
+; GFX10-32-NEXT:    s_wqm_b32 s2, s0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s2
+; GFX10-32-NEXT:  ; %bb.3: ; %.continue0
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s1
+; GFX10-32-NEXT:    s_mov_b32 s1, s0
+; GFX10-32-NEXT:    v_cndmask_b32_e64 v0, 1.0, 0, s1
+; GFX10-32-NEXT:    v_mov_b32_e32 v1, v0
+; GFX10-32-NEXT:    v_mov_b32_dpp v1, v1 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-32-NEXT:    v_subrev_f32_dpp v0, v0, v1 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-32-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s0
+; GFX10-32-NEXT:    v_cmp_neq_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_xor_b32 s1, s0, -1
+; GFX10-32-NEXT:    s_or_b32 s1, s1, vcc_lo
+; GFX10-32-NEXT:    s_and_saveexec_b32 s2, s1
+; GFX10-32-NEXT:    s_xor_b32 s1, exec_lo, s2
+; GFX10-32-NEXT:  ; %bb.4: ; %.demote1
+; GFX10-32-NEXT:    s_andn2_b32 s0, s0, exec_lo
+; GFX10-32-NEXT:    s_cbranch_scc0 BB6_7
+; GFX10-32-NEXT:  ; %bb.5: ; %.demote1
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:  ; %bb.6: ; %.continue1
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s1
+; GFX10-32-NEXT:    v_mov_b32_e32 v0, 0x3c00
+; GFX10-32-NEXT:    v_bfrev_b32_e32 v1, 60
+; GFX10-32-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB6_7:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+;
+; GFX10-64-LABEL: wqm_deriv:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 s[0:1], exec
+; GFX10-64-NEXT:    s_wqm_b64 exec, exec
+; GFX10-64-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-64-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[2:3], vcc
+; GFX10-64-NEXT:    s_xor_b64 s[2:3], exec, s[2:3]
+; GFX10-64-NEXT:  ; %bb.1: ; %.demote0
+; GFX10-64-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; GFX10-64-NEXT:    s_cbranch_scc0 BB6_7
+; GFX10-64-NEXT:  ; %bb.2: ; %.demote0
+; GFX10-64-NEXT:    s_wqm_b64 s[4:5], s[0:1]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[4:5]
+; GFX10-64-NEXT:  ; %bb.3: ; %.continue0
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[2:3]
+; GFX10-64-NEXT:    s_mov_b64 s[2:3], s[0:1]
+; GFX10-64-NEXT:    v_cndmask_b32_e64 v0, 1.0, 0, s[2:3]
+; GFX10-64-NEXT:    v_mov_b32_e32 v1, v0
+; GFX10-64-NEXT:    v_mov_b32_dpp v1, v1 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-64-NEXT:    v_subrev_f32_dpp v0, v0, v1 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-64-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX10-64-NEXT:    v_cmp_neq_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_xor_b64 s[2:3], s[0:1], -1
+; GFX10-64-NEXT:    s_or_b64 s[2:3], s[2:3], vcc
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[4:5], s[2:3]
+; GFX10-64-NEXT:    s_xor_b64 s[2:3], exec, s[4:5]
+; GFX10-64-NEXT:  ; %bb.4: ; %.demote1
+; GFX10-64-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; GFX10-64-NEXT:    s_cbranch_scc0 BB6_7
+; GFX10-64-NEXT:  ; %bb.5: ; %.demote1
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:  ; %bb.6: ; %.continue1
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[2:3]
+; GFX10-64-NEXT:    v_mov_b32_e32 v0, 0x3c00
+; GFX10-64-NEXT:    v_bfrev_b32_e32 v1, 60
+; GFX10-64-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB6_7:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+.entry:
+  %p0 = extractelement <2 x float> %input, i32 0
+  %p1 = extractelement <2 x float> %input, i32 1
+  %x0 = call float @llvm.amdgcn.interp.p1(float %p0, i32 immarg 0, i32 immarg 0, i32 %index) #2
+  %x1 = call float @llvm.amdgcn.interp.p2(float %x0, float %p1, i32 immarg 0, i32 immarg 0, i32 %index) #2
+  %argi = fptosi float %arg to i32
+  %cond0 = icmp eq i32 %argi, 0
+  br i1 %cond0, label %.continue0, label %.demote0
+
+.demote0:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue0
+
+.continue0:
+  %live = call i1 @llvm.amdgcn.live.mask()
+  %live.cond = select i1 %live, i32 0, i32 1065353216
+  %live.v0 = call i32 @llvm.amdgcn.mov.dpp.i32(i32 %live.cond, i32 85, i32 15, i32 15, i1 true)
+  %live.v0f = bitcast i32 %live.v0 to float
+  %live.v1 = call i32 @llvm.amdgcn.mov.dpp.i32(i32 %live.cond, i32 0, i32 15, i32 15, i1 true)
+  %live.v1f = bitcast i32 %live.v1 to float
+  %v0 = fsub float %live.v0f, %live.v1f
+  %v0.wqm = call float @llvm.amdgcn.wqm.f32(float %v0)
+  %cond1 = fcmp oeq float %v0.wqm, 0.000000e+00
+  %cond2 = and i1 %live, %cond1
+  br i1 %cond2, label %.continue1, label %.demote1
+
+.demote1:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue1
+
+.continue1:
+  call void @llvm.amdgcn.exp.compr.v2f16(i32 immarg 0, i32 immarg 15, <2 x half> <half 0xH3C00, half 0xH0000>, <2 x half> <half 0xH0000, half 0xH3C00>, i1 immarg true, i1 immarg true) #3
+  ret void
+}
+
+define amdgpu_ps void @wqm_deriv_loop(<2 x float> %input, float %arg, i32 %index, i32 %limit) {
+; SI-LABEL: wqm_deriv_loop:
+; SI:       ; %bb.0: ; %.entry
+; SI-NEXT:    s_mov_b64 s[0:1], exec
+; SI-NEXT:    s_wqm_b64 exec, exec
+; SI-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; SI-NEXT:    s_mov_b32 s2, 0
+; SI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; SI-NEXT:    s_and_saveexec_b64 s[4:5], vcc
+; SI-NEXT:    s_xor_b64 s[4:5], exec, s[4:5]
+; SI-NEXT:  ; %bb.1: ; %.demote0
+; SI-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; SI-NEXT:    s_cbranch_scc0 BB7_9
+; SI-NEXT:  ; %bb.2: ; %.demote0
+; SI-NEXT:    s_wqm_b64 s[6:7], s[0:1]
+; SI-NEXT:    s_and_b64 exec, exec, s[6:7]
+; SI-NEXT:  ; %bb.3: ; %.continue0.preheader
+; SI-NEXT:    s_or_b64 exec, exec, s[4:5]
+; SI-NEXT:    s_mov_b64 s[4:5], 0
+; SI-NEXT:    s_branch BB7_5
+; SI-NEXT:  BB7_4: ; %.continue1
+; SI-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; SI-NEXT:    s_or_b64 exec, exec, s[6:7]
+; SI-NEXT:    s_add_i32 s2, s2, 1
+; SI-NEXT:    v_cmp_ge_i32_e32 vcc, s2, v1
+; SI-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
+; SI-NEXT:    s_andn2_b64 exec, exec, s[4:5]
+; SI-NEXT:    s_cbranch_execz BB7_8
+; SI-NEXT:  BB7_5: ; %.continue0
+; SI-NEXT:    ; =>This Inner Loop Header: Depth=1
+; SI-NEXT:    v_mov_b32_e32 v0, s2
+; SI-NEXT:    s_mov_b64 s[6:7], s[0:1]
+; SI-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[6:7]
+; SI-NEXT:    v_mov_b32_e32 v2, v0
+; SI-NEXT:    s_xor_b64 s[6:7], s[0:1], -1
+; SI-NEXT:    s_nop 0
+; SI-NEXT:    v_mov_b32_dpp v2, v2 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; SI-NEXT:    s_nop 1
+; SI-NEXT:    v_subrev_f32_dpp v0, v0, v2 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; SI-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; SI-NEXT:    v_cmp_neq_f32_e32 vcc, 0, v0
+; SI-NEXT:    s_or_b64 s[6:7], s[6:7], vcc
+; SI-NEXT:    s_and_saveexec_b64 s[8:9], s[6:7]
+; SI-NEXT:    s_xor_b64 s[6:7], exec, s[8:9]
+; SI-NEXT:    s_cbranch_execz BB7_4
+; SI-NEXT:  ; %bb.6: ; %.demote1
+; SI-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; SI-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; SI-NEXT:    s_cbranch_scc0 BB7_9
+; SI-NEXT:  ; %bb.7: ; %.demote1
+; SI-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; SI-NEXT:    s_wqm_b64 s[8:9], s[0:1]
+; SI-NEXT:    s_and_b64 exec, exec, s[8:9]
+; SI-NEXT:    s_branch BB7_4
+; SI-NEXT:  BB7_8: ; %.return
+; SI-NEXT:    s_or_b64 exec, exec, s[4:5]
+; SI-NEXT:    s_and_b64 exec, exec, s[0:1]
+; SI-NEXT:    v_bfrev_b32_e32 v0, 60
+; SI-NEXT:    v_mov_b32_e32 v1, 0x3c00
+; SI-NEXT:    exp mrt0 v1, v1, v0, v0 done compr vm
+; SI-NEXT:    s_endpgm
+; SI-NEXT:  BB7_9:
+; SI-NEXT:    s_mov_b64 exec, 0
+; SI-NEXT:    exp null off, off, off, off done vm
+; SI-NEXT:    s_endpgm
+;
+; GFX9-LABEL: wqm_deriv_loop:
+; GFX9:       ; %bb.0: ; %.entry
+; GFX9-NEXT:    s_mov_b64 s[0:1], exec
+; GFX9-NEXT:    s_wqm_b64 exec, exec
+; GFX9-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX9-NEXT:    s_mov_b32 s2, 0
+; GFX9-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_and_saveexec_b64 s[4:5], vcc
+; GFX9-NEXT:    s_xor_b64 s[4:5], exec, s[4:5]
+; GFX9-NEXT:  ; %bb.1: ; %.demote0
+; GFX9-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; GFX9-NEXT:    s_cbranch_scc0 BB7_9
+; GFX9-NEXT:  ; %bb.2: ; %.demote0
+; GFX9-NEXT:    s_wqm_b64 s[6:7], s[0:1]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[6:7]
+; GFX9-NEXT:  ; %bb.3: ; %.continue0.preheader
+; GFX9-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX9-NEXT:    s_mov_b64 s[4:5], 0
+; GFX9-NEXT:    s_branch BB7_5
+; GFX9-NEXT:  BB7_4: ; %.continue1
+; GFX9-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX9-NEXT:    s_or_b64 exec, exec, s[6:7]
+; GFX9-NEXT:    s_add_i32 s2, s2, 1
+; GFX9-NEXT:    v_cmp_ge_i32_e32 vcc, s2, v1
+; GFX9-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
+; GFX9-NEXT:    s_andn2_b64 exec, exec, s[4:5]
+; GFX9-NEXT:    s_cbranch_execz BB7_8
+; GFX9-NEXT:  BB7_5: ; %.continue0
+; GFX9-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GFX9-NEXT:    v_mov_b32_e32 v0, s2
+; GFX9-NEXT:    s_mov_b64 s[6:7], s[0:1]
+; GFX9-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[6:7]
+; GFX9-NEXT:    v_mov_b32_e32 v2, v0
+; GFX9-NEXT:    s_xor_b64 s[6:7], s[0:1], -1
+; GFX9-NEXT:    s_nop 0
+; GFX9-NEXT:    v_mov_b32_dpp v2, v2 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX9-NEXT:    s_nop 1
+; GFX9-NEXT:    v_subrev_f32_dpp v0, v0, v2 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX9-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; GFX9-NEXT:    v_cmp_neq_f32_e32 vcc, 0, v0
+; GFX9-NEXT:    s_or_b64 s[6:7], s[6:7], vcc
+; GFX9-NEXT:    s_and_saveexec_b64 s[8:9], s[6:7]
+; GFX9-NEXT:    s_xor_b64 s[6:7], exec, s[8:9]
+; GFX9-NEXT:    s_cbranch_execz BB7_4
+; GFX9-NEXT:  ; %bb.6: ; %.demote1
+; GFX9-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX9-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; GFX9-NEXT:    s_cbranch_scc0 BB7_9
+; GFX9-NEXT:  ; %bb.7: ; %.demote1
+; GFX9-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX9-NEXT:    s_wqm_b64 s[8:9], s[0:1]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[8:9]
+; GFX9-NEXT:    s_branch BB7_4
+; GFX9-NEXT:  BB7_8: ; %.return
+; GFX9-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX9-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX9-NEXT:    v_mov_b32_e32 v0, 0x3c00
+; GFX9-NEXT:    v_bfrev_b32_e32 v1, 60
+; GFX9-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX9-NEXT:    s_endpgm
+; GFX9-NEXT:  BB7_9:
+; GFX9-NEXT:    s_mov_b64 exec, 0
+; GFX9-NEXT:    exp null off, off, off, off done vm
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-32-LABEL: wqm_deriv_loop:
+; GFX10-32:       ; %bb.0: ; %.entry
+; GFX10-32-NEXT:    s_mov_b32 s0, exec_lo
+; GFX10-32-NEXT:    s_wqm_b32 exec_lo, exec_lo
+; GFX10-32-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-32-NEXT:    s_mov_b32 s1, 0
+; GFX10-32-NEXT:    v_cmp_ne_u32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_and_saveexec_b32 s2, vcc_lo
+; GFX10-32-NEXT:    s_xor_b32 s2, exec_lo, s2
+; GFX10-32-NEXT:  ; %bb.1: ; %.demote0
+; GFX10-32-NEXT:    s_andn2_b32 s0, s0, exec_lo
+; GFX10-32-NEXT:    s_cbranch_scc0 BB7_9
+; GFX10-32-NEXT:  ; %bb.2: ; %.demote0
+; GFX10-32-NEXT:    s_wqm_b32 s3, s0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s3
+; GFX10-32-NEXT:  ; %bb.3: ; %.continue0.preheader
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s2
+; GFX10-32-NEXT:    s_mov_b32 s2, 0
+; GFX10-32-NEXT:    s_branch BB7_5
+; GFX10-32-NEXT:  BB7_4: ; %.continue1
+; GFX10-32-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s3
+; GFX10-32-NEXT:    s_add_i32 s2, s2, 1
+; GFX10-32-NEXT:    v_cmp_ge_i32_e32 vcc_lo, s2, v1
+; GFX10-32-NEXT:    s_or_b32 s1, vcc_lo, s1
+; GFX10-32-NEXT:    s_andn2_b32 exec_lo, exec_lo, s1
+; GFX10-32-NEXT:    s_cbranch_execz BB7_8
+; GFX10-32-NEXT:  BB7_5: ; %.continue0
+; GFX10-32-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GFX10-32-NEXT:    s_mov_b32 s3, s0
+; GFX10-32-NEXT:    v_cndmask_b32_e64 v0, s2, 0, s3
+; GFX10-32-NEXT:    s_xor_b32 s3, s0, -1
+; GFX10-32-NEXT:    v_mov_b32_e32 v2, v0
+; GFX10-32-NEXT:    v_mov_b32_dpp v2, v2 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-32-NEXT:    v_subrev_f32_dpp v0, v0, v2 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-32-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; GFX10-32-NEXT:    v_cmp_neq_f32_e32 vcc_lo, 0, v0
+; GFX10-32-NEXT:    s_or_b32 s3, s3, vcc_lo
+; GFX10-32-NEXT:    s_and_saveexec_b32 s4, s3
+; GFX10-32-NEXT:    s_xor_b32 s3, exec_lo, s4
+; GFX10-32-NEXT:    s_cbranch_execz BB7_4
+; GFX10-32-NEXT:  ; %bb.6: ; %.demote1
+; GFX10-32-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-32-NEXT:    s_andn2_b32 s0, s0, exec_lo
+; GFX10-32-NEXT:    s_cbranch_scc0 BB7_9
+; GFX10-32-NEXT:  ; %bb.7: ; %.demote1
+; GFX10-32-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-32-NEXT:    s_wqm_b32 s4, s0
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s4
+; GFX10-32-NEXT:    s_branch BB7_4
+; GFX10-32-NEXT:  BB7_8: ; %.return
+; GFX10-32-NEXT:    s_or_b32 exec_lo, exec_lo, s1
+; GFX10-32-NEXT:    s_and_b32 exec_lo, exec_lo, s0
+; GFX10-32-NEXT:    v_mov_b32_e32 v0, 0x3c00
+; GFX10-32-NEXT:    v_bfrev_b32_e32 v1, 60
+; GFX10-32-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX10-32-NEXT:    s_endpgm
+; GFX10-32-NEXT:  BB7_9:
+; GFX10-32-NEXT:    s_mov_b32 exec_lo, 0
+; GFX10-32-NEXT:    exp null off, off, off, off done vm
+; GFX10-32-NEXT:    s_endpgm
+;
+; GFX10-64-LABEL: wqm_deriv_loop:
+; GFX10-64:       ; %bb.0: ; %.entry
+; GFX10-64-NEXT:    s_mov_b64 s[0:1], exec
+; GFX10-64-NEXT:    s_wqm_b64 exec, exec
+; GFX10-64-NEXT:    v_cvt_i32_f32_e32 v0, v0
+; GFX10-64-NEXT:    s_mov_b32 s2, 0
+; GFX10-64-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[4:5], vcc
+; GFX10-64-NEXT:    s_xor_b64 s[4:5], exec, s[4:5]
+; GFX10-64-NEXT:  ; %bb.1: ; %.demote0
+; GFX10-64-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; GFX10-64-NEXT:    s_cbranch_scc0 BB7_9
+; GFX10-64-NEXT:  ; %bb.2: ; %.demote0
+; GFX10-64-NEXT:    s_wqm_b64 s[6:7], s[0:1]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[6:7]
+; GFX10-64-NEXT:  ; %bb.3: ; %.continue0.preheader
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX10-64-NEXT:    s_mov_b64 s[4:5], 0
+; GFX10-64-NEXT:    s_branch BB7_5
+; GFX10-64-NEXT:  BB7_4: ; %.continue1
+; GFX10-64-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[6:7]
+; GFX10-64-NEXT:    s_add_i32 s2, s2, 1
+; GFX10-64-NEXT:    v_cmp_ge_i32_e32 vcc, s2, v1
+; GFX10-64-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
+; GFX10-64-NEXT:    s_andn2_b64 exec, exec, s[4:5]
+; GFX10-64-NEXT:    s_cbranch_execz BB7_8
+; GFX10-64-NEXT:  BB7_5: ; %.continue0
+; GFX10-64-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GFX10-64-NEXT:    s_mov_b64 s[6:7], s[0:1]
+; GFX10-64-NEXT:    v_cndmask_b32_e64 v0, s2, 0, s[6:7]
+; GFX10-64-NEXT:    s_xor_b64 s[6:7], s[0:1], -1
+; GFX10-64-NEXT:    v_mov_b32_e32 v2, v0
+; GFX10-64-NEXT:    v_mov_b32_dpp v2, v2 quad_perm:[1,1,1,1] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-64-NEXT:    v_subrev_f32_dpp v0, v0, v2 quad_perm:[0,0,0,0] row_mask:0xf bank_mask:0xf bound_ctrl:0
+; GFX10-64-NEXT:    ; kill: def $vgpr0 killed $vgpr0 killed $exec
+; GFX10-64-NEXT:    v_cmp_neq_f32_e32 vcc, 0, v0
+; GFX10-64-NEXT:    s_or_b64 s[6:7], s[6:7], vcc
+; GFX10-64-NEXT:    s_and_saveexec_b64 s[8:9], s[6:7]
+; GFX10-64-NEXT:    s_xor_b64 s[6:7], exec, s[8:9]
+; GFX10-64-NEXT:    s_cbranch_execz BB7_4
+; GFX10-64-NEXT:  ; %bb.6: ; %.demote1
+; GFX10-64-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-64-NEXT:    s_andn2_b64 s[0:1], s[0:1], exec
+; GFX10-64-NEXT:    s_cbranch_scc0 BB7_9
+; GFX10-64-NEXT:  ; %bb.7: ; %.demote1
+; GFX10-64-NEXT:    ; in Loop: Header=BB7_5 Depth=1
+; GFX10-64-NEXT:    s_wqm_b64 s[8:9], s[0:1]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[8:9]
+; GFX10-64-NEXT:    s_branch BB7_4
+; GFX10-64-NEXT:  BB7_8: ; %.return
+; GFX10-64-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX10-64-NEXT:    s_and_b64 exec, exec, s[0:1]
+; GFX10-64-NEXT:    v_mov_b32_e32 v0, 0x3c00
+; GFX10-64-NEXT:    v_bfrev_b32_e32 v1, 60
+; GFX10-64-NEXT:    exp mrt0 v0, v0, v1, v1 done compr vm
+; GFX10-64-NEXT:    s_endpgm
+; GFX10-64-NEXT:  BB7_9:
+; GFX10-64-NEXT:    s_mov_b64 exec, 0
+; GFX10-64-NEXT:    exp null off, off, off, off done vm
+; GFX10-64-NEXT:    s_endpgm
+.entry:
+  %p0 = extractelement <2 x float> %input, i32 0
+  %p1 = extractelement <2 x float> %input, i32 1
+  %x0 = call float @llvm.amdgcn.interp.p1(float %p0, i32 immarg 0, i32 immarg 0, i32 %index) #2
+  %x1 = call float @llvm.amdgcn.interp.p2(float %x0, float %p1, i32 immarg 0, i32 immarg 0, i32 %index) #2
+  %argi = fptosi float %arg to i32
+  %cond0 = icmp eq i32 %argi, 0
+  br i1 %cond0, label %.continue0, label %.demote0
+
+.demote0:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue0
+
+.continue0:
+  %count = phi i32 [ 0, %.entry ], [ 0, %.demote0 ], [ %next, %.continue1 ]
+  %live = call i1 @llvm.amdgcn.live.mask()
+  %live.cond = select i1 %live, i32 0, i32 %count
+  %live.v0 = call i32 @llvm.amdgcn.mov.dpp.i32(i32 %live.cond, i32 85, i32 15, i32 15, i1 true)
+  %live.v0f = bitcast i32 %live.v0 to float
+  %live.v1 = call i32 @llvm.amdgcn.mov.dpp.i32(i32 %live.cond, i32 0, i32 15, i32 15, i1 true)
+  %live.v1f = bitcast i32 %live.v1 to float
+  %v0 = fsub float %live.v0f, %live.v1f
+  %v0.wqm = call float @llvm.amdgcn.wqm.f32(float %v0)
+  %cond1 = fcmp oeq float %v0.wqm, 0.000000e+00
+  %cond2 = and i1 %live, %cond1
+  br i1 %cond2, label %.continue1, label %.demote1
+
+.demote1:
+  call void @llvm.amdgcn.wqm.demote(i1 false)
+  br label %.continue1
+
+.continue1:
+  %next = add i32 %count, 1
+  %loop.cond = icmp slt i32 %next, %limit
+  br i1 %loop.cond, label %.continue0, label %.return
+
+.return:
+  call void @llvm.amdgcn.exp.compr.v2f16(i32 immarg 0, i32 immarg 15, <2 x half> <half 0xH3C00, half 0xH0000>, <2 x half> <half 0xH0000, half 0xH3C00>, i1 immarg true, i1 immarg true) #3
+  ret void
+}
+
+declare void @llvm.amdgcn.wqm.demote(i1) #0
+declare i1 @llvm.amdgcn.live.mask() #0
+declare void @llvm.amdgcn.exp.f32(i32, i32, float, float, float, float, i1, i1) #0
+declare <4 x float> @llvm.amdgcn.image.sample.1d.v4f32.f32(i32, float, <8 x i32>, <4 x i32>, i1, i32, i32) #1
+declare float @llvm.amdgcn.wqm.f32(float) #1
+declare float @llvm.amdgcn.interp.p1(float, i32 immarg, i32 immarg, i32) #2
+declare float @llvm.amdgcn.interp.p2(float, float, i32 immarg, i32 immarg, i32) #2
+declare void @llvm.amdgcn.exp.compr.v2f16(i32 immarg, i32 immarg, <2 x half>, <2 x half>, i1 immarg, i1 immarg) #3
+declare i32 @llvm.amdgcn.mov.dpp.i32(i32, i32 immarg, i32 immarg, i32 immarg, i1 immarg) #4
+
+attributes #0 = { nounwind }
+attributes #1 = { nounwind readnone }
+attributes #2 = { nounwind readnone speculatable }
+attributes #3 = { inaccessiblememonly nounwind }
+attributes #4 = { convergent nounwind readnone }