AMDGPU: Write LDS objects out as global symbols in code generation

[nhaehnle]

Summary

The symbols are of the STT_AMDGPU_LDS type introduced with a previous
change. The linker is then expected to resolve relocations, which are
also emitted.

Initially disabled for HSA and PAL environments until they have caught up
in terms of linker and runtime loader.

Some notes:

• The llvm.amdgcn.groupstaticsize intrinsics can no longer be lowered to a constant at compile times, which means some tests can no longer be applied.
  
  The current "solution" is a terrible hack, but the intrinsic isn't used by Mesa, so we can keep it for now.

• We no longer know the full LDS size per kernel at compile time, which means that we can no longer generate a relevant error message at compile time. It would be possible to add a check for the size of individual variables, but ultimately the linker will have to perform the final check.

Change-Id: If66dbf33fccfbf3609aefefa2558ac0850d42275

[arsenm]

Is it still possible to make use constant addresses in some cases? If there are no calls for example

include/llvm/CodeGen/AsmPrinter.h

623–628 ↗

(On Diff #197962)

Separate patch

include/llvm/CodeGen/MachineOperand.h

716–718 ↗

(On Diff #197962)

This should be a separate patch

[nhaehnle]

In D61494#1489467, @arsenm wrote:

Is it still possible to make use constant addresses in some cases? If there are no calls for example

I'm changing the patch so that the symbols are only generated for globals with external linkage as discussed.

[nhaehnle]

Address review comments.

[arsenm]

lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp

323

This uses the deprecated pointer type method. This should use getValueType() on the global instead

lib/Target/AMDGPU/SIISelLowering.cpp

4681–4685

Shouldn't introduce machine nodes here. What is the problem with selecting the GlobalAddress directly in a tablegen pattern or manually in AMDGPUISelDAGToDAG?

5675–5676

Maybe we can define the intrinsic to return -1 if the size can't be determined, similar to how llvm.objectsize works?

10132–10145

I don't think there should be a need to handle machine nodes here, particularly moves. The GlobalAddress should be legal, and the select pattern should be inserting the move?

test/CodeGen/AMDGPU/constant-fold-mi-operands.ll

4–6 ↗

(On Diff #198518)

I'm not sure these tests have been entirely replaced with MIR yet. Can you just set the triple to preserve them?

test/CodeGen/AMDGPU/sopk-compares.ll

4–8 ↗

(On Diff #198518)

I'm 99% sure we don't have replacements for any of these tests either. The point of these isn't to use groupstaticsize, but to get some constant that isn't visible during selection. These shouldn't be removed

367–369 ↗

(On Diff #198518)

Ditto

test/CodeGen/AMDGPU/sub.i16.ll

147 ↗

(On Diff #198518)

Ditto

[nhaehnle]

Rebase, address some of the comments.

[nhaehnle]

lib/Target/AMDGPU/SIISelLowering.cpp

5675–5676

Makes sense, though that seems like a task for a separate change.

[nhaehnle]

Wrap LDS TargetGlobalAddress nodes in an AMDGPUISD::LDS node that is
selected to S_MOV/V_MOV. This should address the concerns about having
more machine nodes during SelectionDAG, and as a nice side bonus it
actually improves the quality of known-bits information by adding
alignment information as well.

[arsenm]

lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp

304–306

This breaks the initializer error. This should be moved after

[nhaehnle]

Address review comment

[arsenm]

LGTM

lib/Target/AMDGPU/SIInstructions.td

1144–1147 ↗

(On Diff #205157)

I would be surprised this is ever useful, but it's fine

[nhaehnle]

Thanks.

lib/Target/AMDGPU/SIInstructions.td

1144–1147 ↗

(On Diff #205157)

This is required to get rid of the SIlds node. Without wrapping the targetglobaladdress in a dedicated node, a lot of stuff just breaks or gets really messy, e.g.:

1. Global addrs can't be address operands for DS instructions, so we'd need to pick them out there manually.
2. At least one test case numerically compares an LDS address to a number and ends up breaking the constant bus limitations without this.

Besides, all the targets I've looked at de facto wrap targetglobaladdresses in other DAG nodes in one way or another. Selecting "naked" tgas seems to just be totally unexpected behavior.

This also simplifies the computeKnownBits integration. Long story short, the weird stuff I did previously were all things to work around the deficiencies of naked tgas and my thinking it would be nicer to avoid a dedicated SD node just for this. I still think it's silly to require a dedicated SD node, but that assumption is deeply embedded in a lot of places...

[hakzsam]

Hi Nicolai,

This introduced some CTS regressions with RADV, for example dEQP-VK.pipeline.spec_constant.compute.local_size.x.

Is this expected?

Thanks!

[nhaehnle]

Oh... radv declares compute LDS as an LLVM global variable but doesn't use rtld yet, right? Sorry, I missed that.

[hakzsam]

Yes.

[hakzsam]

Do you plan to fix it? It breaks a bunch of games.

[nhaehnle]

I'm currently looking into it.

[nhaehnle]

https://gitlab.freedesktop.org/mesa/mesa/merge_requests/1220

lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp

DisasmLines.push_back(
          + "_" + Twine(MBB.getNumber()) + ":").str());
     DisasmLineMaxLen = std::max(DisasmLineMaxLen, DisasmLines.back().size());
     HexLines.push_back("");
   }
   AsmPrinter::EmitBasicBlockStart(MBB);
 }
 
 void AMDGPUAsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
+  if (GV->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS) {
+    const Triple::OSType OS = TM.getTargetTriple().getOS();
 
-  // Group segment variables aren't emitted in HSA.
-  if (AMDGPU::isGroupSegment(GV))
+    // LDS variables aren't emitted in HSA or PAL yet.
+    if (OS == Triple::AMDHSA || OS == Triple::AMDPAL)
       return;
 
+    if (GV->hasInitializer() && !isa<UndefValue>(GV->getInitializer())) {
+      OutContext.reportError({},
+                             Twine(GV->getName()) +
+                                 ": unsupported initializer for address space");
+      return;
+    }
+
+    MCSymbol *GVSym = getSymbol(GV);
+
+    GVSym->redefineIfPossible();
+    if (GVSym->isDefined() || GVSym->isVariable())
+      report_fatal_error("symbol '" + Twine(GVSym->getName()) +
+                         "' is already defined");
+
+    const DataLayout &DL = GV->getParent()->getDataLayout();
+    uint64_t Size = DL.getTypeAllocSize(GV->getValueType());
+    unsigned Align = GV->getAlignment();
+    if (!Align)
+      Align = 4;
+
+    EmitVisibility(GVSym, GV->getVisibility(), !GV->isDeclaration());
+    EmitLinkage(GV, GVSym);
+    getTargetStreamer()->emitAMDGPULDS(GVSym, Size, Align);
+    return;
+  }
+
   AsmPrinter::EmitGlobalVariable(GV);
 }
 
 bool AMDGPUAsmPrinter::doFinalization(Module &M) {
   CallGraphResourceInfo.clear();
 
   if (AMDGPU::isGFX10(*getGlobalSTI())) {
     OutStreamer->SwitchSection(getObjFileLowering().getTextSection());

lib/Target/AMDGPU/SIFoldOperands.cpp

FoldCandidate(MachineInstr *MI, unsigned OpNo, MachineOperand *FoldOp,
     UseMI(MI), OpToFold(nullptr), ShrinkOpcode(ShrinkOp), UseOpNo(OpNo),
     Kind(FoldOp->getType()),
     Commuted(Commuted_) {
     if (FoldOp->isImm()) {
       ImmToFold = FoldOp->getImm();
     } else if (FoldOp->isFI()) {
       FrameIndexToFold = FoldOp->getIndex();
     } else {
-      assert(FoldOp->isReg());
+      assert(FoldOp->isReg() || FoldOp->isGlobal());
       OpToFold = FoldOp;
     }
   }
 
   bool isFI() const {
     return Kind == MachineOperand::MO_FrameIndex;
   }
 
   bool isImm() const {
     return Kind == MachineOperand::MO_Immediate;
   }
 
   bool isReg() const {
     return Kind == MachineOperand::MO_Register;
   }
 
+  bool isGlobal() const { return Kind == MachineOperand::MO_GlobalAddress; }
+
   bool isCommuted() const {
     return Commuted;
   }
 
   bool needsShrink() const {
     return ShrinkOpcode != -1;
   }
 
if (MI->getDesc().TSFlags & SIInstrFlags::IsPacked &&
         }
         break;
       default:
         break;
       }
     }
   }
 
-  if ((Fold.isImm() || Fold.isFI()) && Fold.needsShrink()) {
+  if ((Fold.isImm() || Fold.isFI() || Fold.isGlobal()) && Fold.needsShrink()) {
     MachineBasicBlock *MBB = MI->getParent();
     auto Liveness = MBB->computeRegisterLiveness(&TRI, AMDGPU::VCC, MI);
     if (Liveness != MachineBasicBlock::LQR_Dead)
       return false;
 
     MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
     int Op32 = Fold.getShrinkOpcode();
     MachineOperand &Dst0 = MI->getOperand(0);
static bool updateOperand(FoldCandidate &Fold,
 
   assert(!Fold.needsShrink() && "not handled");
 
   if (Fold.isImm()) {
     Old.ChangeToImmediate(Fold.ImmToFold);
     return true;
   }
 
+  if (Fold.isGlobal()) {
+    Old.ChangeToGA(Fold.OpToFold->getGlobal(), Fold.OpToFold->getOffset(),
+                   Fold.OpToFold->getTargetFlags());
+    return true;
+  }
+
   if (Fold.isFI()) {
     Old.ChangeToFrameIndex(Fold.FrameIndexToFold);
     return true;
   }
 
   MachineOperand *New = Fold.OpToFold;
   if (TargetRegisterInfo::isVirtualRegister(Old.getReg()) &&
       TargetRegisterInfo::isVirtualRegister(New->getReg())) {
if (!TII->isOperandLegal(*MI, OpNo, OpToFold)) {
     if (!CanCommute ||
         !TII->commuteInstruction(*MI, false, CommuteIdx0, CommuteIdx1))
       return false;
 
     if (!TII->isOperandLegal(*MI, CommuteOpNo, OpToFold)) {
       if ((Opc == AMDGPU::V_ADD_I32_e64 ||
            Opc == AMDGPU::V_SUB_I32_e64 ||
            Opc == AMDGPU::V_SUBREV_I32_e64) && // FIXME
-          (OpToFold->isImm() || OpToFold->isFI())) {
+          (OpToFold->isImm() || OpToFold->isFI() || OpToFold->isGlobal())) {
         MachineRegisterInfo &MRI = MI->getParent()->getParent()->getRegInfo();
 
         // Verify the other operand is a VGPR, otherwise we would violate the
         // constant bus restriction.
         unsigned OtherIdx = CommuteOpNo == CommuteIdx0 ? CommuteIdx1 : CommuteIdx0;
         MachineOperand &OtherOp = MI->getOperand(OtherIdx);
         if (!OtherOp.isReg() ||
             !TII->getRegisterInfo().isVGPR(MRI, OtherOp.getReg()))
for (MachineRegisterInfo::use_iterator
 
       foldOperand(OpToFold, RSUseMI, RSUse.getOperandNo(), FoldList,
                   CopiesToReplace);
     }
 
     return;
   }
 
-
-  bool FoldingImm = OpToFold.isImm();
+  bool FoldingImm = OpToFold.isImm() || OpToFold.isGlobal();
 
   if (FoldingImm && UseMI->isCopy()) {
     unsigned DestReg = UseMI->getOperand(0).getReg();
     const TargetRegisterClass *DestRC
       = TargetRegisterInfo::isVirtualRegister(DestReg) ?
       MRI->getRegClass(DestReg) :
       TRI->getPhysRegClass(DestReg);
 
void SIFoldOperands::foldInstOperand(MachineInstr &MI,
                                      MachineOperand &OpToFold) const {
   // We need mutate the operands of new mov instructions to add implicit
   // uses of EXEC, but adding them invalidates the use_iterator, so defer
   // this.
   SmallVector<MachineInstr *, 4> CopiesToReplace;
   SmallVector<FoldCandidate, 4> FoldList;
   MachineOperand &Dst = MI.getOperand(0);
 
-  bool FoldingImm = OpToFold.isImm() || OpToFold.isFI();
+  bool FoldingImm = OpToFold.isImm() || OpToFold.isFI() || OpToFold.isGlobal();
   if (FoldingImm) {
     unsigned NumLiteralUses = 0;
     MachineOperand *NonInlineUse = nullptr;
     int NonInlineUseOpNo = -1;
 
     MachineRegisterInfo::use_iterator NextUse;
     for (MachineRegisterInfo::use_iterator
            Use = MRI->use_begin(Dst.getReg()), E = MRI->use_end();
for (I = MBB->begin(); I != MBB->end(); I = Next) {
         // instruction, and not the omod multiply.
         if (IsIEEEMode || (!HasNSZ && !MI.getFlag(MachineInstr::FmNsz)) ||
             !tryFoldOMod(MI))
           tryFoldClamp(MI);
         continue;
       }
 
       MachineOperand &OpToFold = MI.getOperand(1);
-      bool FoldingImm = OpToFold.isImm() || OpToFold.isFI();
+      bool FoldingImm =
+          OpToFold.isImm() || OpToFold.isFI() || OpToFold.isGlobal();
 
       // FIXME: We could also be folding things like TargetIndexes.
       if (!FoldingImm && !OpToFold.isReg())
         continue;
 
       if (OpToFold.isReg() &&
           !TargetRegisterInfo::isVirtualRegister(OpToFold.getReg()))
         continue;

lib/Target/AMDGPU/SIISelLowering.h

public:
   getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI,
                                StringRef Constraint, MVT VT) const override;
   ConstraintType getConstraintType(StringRef Constraint) const override;
   SDValue copyToM0(SelectionDAG &DAG, SDValue Chain, const SDLoc &DL,
                    SDValue V) const;
 
   void finalizeLowering(MachineFunction &MF) const override;
 
+  void computeKnownBitsForTargetNode(const SDValue Op, KnownBits &Known,
+                                     const APInt &DemandedElts,
+                                     const SelectionDAG &DAG,
+                                     unsigned Depth = 0) const override;
   void computeKnownBitsForFrameIndex(const SDValue Op,
                                      KnownBits &Known,
                                      const APInt &DemandedElts,
                                      const SelectionDAG &DAG,
                                      unsigned Depth = 0) const override;
 
   bool isSDNodeSourceOfDivergence(const SDNode *N,
     FunctionLoweringInfo *FLI, LegacyDivergenceAnalysis *DA) const override;

lib/Target/AMDGPU/SIISelLowering.cpp

BuildMI(*BB, FirstMI, DebugLoc(),
             TII->get(isWave32 ? AMDGPU::S_CMOV_B32 : AMDGPU::S_CMOV_B64),
             Exec)
         .addImm(-1);
     MI.eraseFromParent();
     return BB;
   }
 
   case AMDGPU::GET_GROUPSTATICSIZE: {
+    assert(getTargetMachine().getTargetTriple().getOS() == Triple::AMDHSA ||
+           getTargetMachine().getTargetTriple().getOS() == Triple::AMDPAL);
     DebugLoc DL = MI.getDebugLoc();
     BuildMI(*BB, MI, DL, TII->get(AMDGPU::S_MOV_B32))
         .add(MI.getOperand(0))
         .addImm(MFI->getLDSSize());
     MI.eraseFromParent();
     return BB;
   }
   case AMDGPU::SI_INDIRECT_SRC_V1:
buildPCRelGlobalAddress(SelectionDAG &DAG, const GlobalValue *GV,
   return DAG.getNode(AMDGPUISD::PC_ADD_REL_OFFSET, DL, PtrVT, PtrLo, PtrHi);
 }
 
 SDValue SITargetLowering::LowerGlobalAddress(AMDGPUMachineFunction *MFI,
                                              SDValue Op,
                                              SelectionDAG &DAG) const {
   GlobalAddressSDNode *GSD = cast<GlobalAddressSDNode>(Op);
   const GlobalValue *GV = GSD->getGlobal();
-  if (GSD->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS ||
+  if ((GSD->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS &&
+       (!GV->hasExternalLinkage() ||
+        getTargetMachine().getTargetTriple().getOS() == Triple::AMDHSA ||
+        getTargetMachine().getTargetTriple().getOS() == Triple::AMDPAL)) ||
       GSD->getAddressSpace() == AMDGPUAS::REGION_ADDRESS ||
       GSD->getAddressSpace() == AMDGPUAS::PRIVATE_ADDRESS)
     return AMDGPUTargetLowering::LowerGlobalAddress(MFI, Op, DAG);
 
   SDLoc DL(GSD);
   EVT PtrVT = Op.getValueType();
 
-  // FIXME: Should not make address space based decisions here.
+  if (GSD->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS) {
+    SDValue GA = DAG.getTargetGlobalAddress(GV, DL, MVT::i32, GSD->getOffset(),
+                                            SIInstrInfo::MO_ABS32_LO);
+    GA = DAG.getNode(ISD::AssertZext, DL, MVT::i32, GA,
+                     DAG.getValueType(MVT::i16));
+    return {DAG.getMachineNode(AMDGPU::S_MOV_B32, DL, MVT::i32, GA), 0};
+  }
+
   if (shouldEmitFixup(GV))
     return buildPCRelGlobalAddress(DAG, GV, DL, GSD->getOffset(), PtrVT);
   else if (shouldEmitPCReloc(GV))
     return buildPCRelGlobalAddress(DAG, GV, DL, GSD->getOffset(), PtrVT,
                                    SIInstrInfo::MO_REL32);
 
   SDValue GOTAddr = buildPCRelGlobalAddress(DAG, GV, DL, 0, PtrVT,
                                             SIInstrInfo::MO_GOTPCREL32);
case Intrinsic::amdgcn_wwm: {
     return SDValue(DAG.getMachineNode(AMDGPU::WWM, DL, Src.getValueType(), Src),
                    0);
   }
   case Intrinsic::amdgcn_fmad_ftz:
     return DAG.getNode(AMDGPUISD::FMAD_FTZ, DL, VT, Op.getOperand(1),
                        Op.getOperand(2), Op.getOperand(3));
 
   case Intrinsic::amdgcn_if_break:
     return SDValue(DAG.getMachineNode(AMDGPU::SI_IF_BREAK, DL, VT,
                                       Op->getOperand(1), Op->getOperand(2)), 0);
 
+  case Intrinsic::amdgcn_groupstaticsize: {
+    Triple::OSType OS = getTargetMachine().getTargetTriple().getOS();
+    if (OS == Triple::AMDHSA || OS == Triple::AMDPAL)
+      return Op;
+
+    const Module *M = MF.getFunction().getParent();
+    const GlobalValue *GV =
+        M->getNamedValue(Intrinsic::getName(Intrinsic::amdgcn_groupstaticsize));
+    SDValue GA = DAG.getTargetGlobalAddress(GV, DL, MVT::i32, 0,
+                                            SIInstrInfo::MO_ABS32_LO);
+    return {DAG.getMachineNode(AMDGPU::S_MOV_B32, DL, MVT::i32, GA), 0};
+  }
   default:
     if (const AMDGPU::ImageDimIntrinsicInfo *ImageDimIntr =
             AMDGPU::getImageDimIntrinsicInfo(IntrinsicID))
       return lowerImage(Op, ImageDimIntr, DAG);
 
     return Op;
   }
 }
for (auto &MBB : MF) {
         TII->fixImplicitOperands(MI);
       }
     }
   }
 
   TargetLoweringBase::finalizeLowering(MF);
 }
 
+void SITargetLowering::computeKnownBitsForTargetNode(const SDValue Op,
+                                                     KnownBits &Known,
+                                                     const APInt &DemandedElts,
+                                                     const SelectionDAG &DAG,
+                                                     unsigned Depth) const {
+  if (Op->isMachineOpcode()) {
+    switch (Op->getMachineOpcode()) {
+    case AMDGPU::S_MOV_B32:
+    case AMDGPU::V_MOV_B32_e32:
+      Known = DAG.computeKnownBits(Op->getOperand(0), DemandedElts, Depth + 1);
+      break;
+    default:
+      break;
+    }
+    return;
+  }
+
+  AMDGPUTargetLowering::computeKnownBitsForTargetNode(Op, Known, DemandedElts,
+                                                      DAG, Depth);
+}
+
 void SITargetLowering::computeKnownBitsForFrameIndex(const SDValue Op,
                                                      KnownBits &Known,
                                                      const APInt &DemandedElts,
                                                      const SelectionDAG &DAG,
                                                      unsigned Depth) const {
   TargetLowering::computeKnownBitsForFrameIndex(Op, Known, DemandedElts,
                                                 DAG, Depth);
 

lib/Target/AMDGPU/SIInstrInfo.cpp

static bool compareMachineOp(const MachineOperand &Op0,
   }
 }
 
 bool SIInstrInfo::isImmOperandLegal(const MachineInstr &MI, unsigned OpNo,
                                     const MachineOperand &MO) const {
   const MCInstrDesc &InstDesc = MI.getDesc();
   const MCOperandInfo &OpInfo = InstDesc.OpInfo[OpNo];
 
-  assert(MO.isImm() || MO.isTargetIndex() || MO.isFI());
+  assert(MO.isImm() || MO.isTargetIndex() || MO.isFI() || MO.isGlobal());
 
   if (OpInfo.OperandType == MCOI::OPERAND_IMMEDIATE)
     return true;
 
   if (OpInfo.RegClass < 0)
     return false;
 
   if (MO.isImm() && isInlineConstant(MO, OpInfo))

 
 bool SIInstrInfo::isLegalVSrcOperand(const MachineRegisterInfo &MRI,
                                      const MCOperandInfo &OpInfo,
                                      const MachineOperand &MO) const {
   if (MO.isReg())
     return isLegalRegOperand(MRI, OpInfo, MO);
 
   // Handle non-register types that are treated like immediates.
-  assert(MO.isImm() || MO.isTargetIndex() || MO.isFI());
+  assert(MO.isImm() || MO.isTargetIndex() || MO.isFI() || MO.isGlobal());
   return true;
 }
 
 bool SIInstrInfo::isOperandLegal(const MachineInstr &MI, unsigned OpIdx,
                                  const MachineOperand *MO) const {
   const MachineFunction &MF = *MI.getParent()->getParent();
   const MachineRegisterInfo &MRI = MF.getRegInfo();
   const MCInstrDesc &InstDesc = MI.getDesc();
bool SIInstrInfo::isOperandLegal(const MachineInstr &MI, unsigned OpIdx,
   }
 
   if (MO->isReg()) {
     assert(DefinedRC);
     return isLegalRegOperand(MRI, OpInfo, *MO);
   }
 
   // Handle non-register types that are treated like immediates.
-  assert(MO->isImm() || MO->isTargetIndex() || MO->isFI());
+  assert(MO->isImm() || MO->isTargetIndex() || MO->isFI() || MO->isGlobal());
 
   if (!DefinedRC) {
     // This operand expects an immediate.
     return true;
   }
 
   return isImmOperandLegal(MI, OpIdx, *MO);
 }

lib/Target/AMDGPU/SIShrinkInstructions.cpp

if (TargetRegisterInfo::isVirtualRegister(Reg) && MRI.hasOneUse(Reg)) {
           // a single mov, so we need to clear any subregister flag.
           Src0.setSubReg(0);
           Src0.ChangeToImmediate(MovSrc.getImm());
           ConstantFolded = true;
         } else if (MovSrc.isFI()) {
           Src0.setSubReg(0);
           Src0.ChangeToFrameIndex(MovSrc.getIndex());
           ConstantFolded = true;
+        } else if (MovSrc.isGlobal()) {
+          Src0.ChangeToGA(MovSrc.getGlobal(), MovSrc.getOffset(),
+                          MovSrc.getTargetFlags());
+          ConstantFolded = true;
         }
 
         if (ConstantFolded) {
           assert(MRI.use_empty(Reg));
           Def->eraseFromParent();
           ++NumLiteralConstantsFolded;
           return true;
         }

test/CodeGen/AMDGPU/32-bit-local-address-space.ll

define amdgpu_kernel void @mul_32bit_ptr(float addrspace(1)* %out, [3 x float] addrspace(3)* %lds, i32 %tid) {
   %val = load float, float addrspace(3)* %ptr
   store float %val, float addrspace(1)* %out
   ret void
 }
 
 @g_lds = addrspace(3) global float undef, align 4
 
 ; FUNC-LABEL: {{^}}infer_ptr_alignment_global_offset:
-; SI: v_mov_b32_e32 [[REG:v[0-9]+]], 0
-; SI: ds_read_b32 v{{[0-9]+}}, [[REG]]
+; SI: v_mov_b32_e32 [[PTR:v[0-9]+]], g_lds@abs32@lo
+; SI: ds_read_b32 v{{[0-9]+}}, [[PTR]]
 define amdgpu_kernel void @infer_ptr_alignment_global_offset(float addrspace(1)* %out, i32 %tid) {
   %val = load float, float addrspace(3)* @g_lds
   store float %val, float addrspace(1)* %out
   ret void
 }
 
 
 @ptr = addrspace(3) global i32 addrspace(3)* undef

test/CodeGen/AMDGPU/ds-sub-offset.ll

 ; RUN: llc -march=amdgcn -mcpu=bonaire -verify-machineinstrs < %s | FileCheck -enable-var-scope -check-prefixes=GCN,CI %s
 ; RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -enable-var-scope -check-prefixes=GCN,GFX9 %s
 
 declare i32 @llvm.amdgcn.workitem.id.x() #0
 
 @lds.obj = addrspace(3) global [256 x i32] undef, align 4
 
 ; GCN-LABEL: {{^}}write_ds_sub0_offset0_global:
 ; GCN: v_lshlrev_b32_e32 [[SHL:v[0-9]+]], 2, v0
-; CI: v_sub_i32_e32 [[BASEPTR:v[0-9]+]], vcc, 0, [[SHL]]
-; GFX9: v_sub_u32_e32 [[BASEPTR:v[0-9]+]], 0, [[SHL]]
+; GCN: v_sub_{{[iu]}}32_e32 [[BASEPTR:v[0-9]+]], {{(vcc, )?}}lds.obj@abs32@lo, [[SHL]]
 ; GCN: v_mov_b32_e32 [[VAL:v[0-9]+]], 0x7b
 ; GCN: ds_write_b32 [[BASEPTR]], [[VAL]] offset:12
 define amdgpu_kernel void @write_ds_sub0_offset0_global() #0 {
 entry:
   %x.i = call i32 @llvm.amdgcn.workitem.id.x() #1
   %sub1 = sub i32 0, %x.i
   %tmp0 = getelementptr [256 x i32], [256 x i32] addrspace(3)* @lds.obj, i32 0, i32 %sub1
   %arrayidx = getelementptr inbounds i32, i32 addrspace(3)* %tmp0, i32 3

test/CodeGen/AMDGPU/ds_read2.ll

define amdgpu_kernel void @misaligned_2_simple_read2_f32(float addrspace(1)* %out, float addrspace(3)* %lds) #0 {
   store float %sum, float addrspace(1)* %out.gep, align 4
   ret void
 }
 
 ; GCN-LABEL: @simple_read2_f64
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
-; GCN-DAG: v_lshlrev_b32_e32 [[VPTR:v[0-9]+]], 3, {{v[0-9]+}}
+; GCN-DAG: v_lshlrev_b32_e32 [[VOFS:v[0-9]+]], 3, {{v[0-9]+}}
+; GCN-DAG: v_add_{{[iu]}}32_e32 [[VPTR:v[0-9]+]], {{(vcc, )?}}lds.f64@abs32@lo, [[VOFS]]
 ; GCN: ds_read2_b64 v{{\[}}[[LO_VREG:[0-9]+]]:[[HI_VREG:[0-9]+]]{{\]}}, [[VPTR]] offset1:8
 ; GCN: v_add_f64 [[RESULT:v\[[0-9]+:[0-9]+\]]], v{{\[}}[[LO_VREG]]:{{[0-9]+\]}}, v{{\[[0-9]+}}:[[HI_VREG]]{{\]}}
 
 ; CI: buffer_store_dwordx2 [[RESULT]]
 ; GFX9: global_store_dwordx2 v{{\[[0-9]+:[0-9]+\]}}, [[RESULT]]
 define amdgpu_kernel void @simple_read2_f64(double addrspace(1)* %out) #0 {
   %x.i = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %arrayidx0 = getelementptr inbounds [512 x double], [512 x double] addrspace(3)* @lds.f64, i32 0, i32 %x.i

 }
 
 @foo = addrspace(3) global [4 x i32] undef, align 4
 
 ; GCN-LABEL: @load_constant_adjacent_offsets
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
-; GCN-DAG: v_mov_b32_e32 [[ZERO:v[0-9]+]], 0{{$}}
-; GCN: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[ZERO]] offset1:1
+; GCN-DAG: v_mov_b32_e32 [[PTR:v[0-9]+]], foo@abs32@lo{{$}}
+; GCN: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[PTR]] offset1:1
 define amdgpu_kernel void @load_constant_adjacent_offsets(i32 addrspace(1)* %out) {
   %val0 = load i32, i32 addrspace(3)* getelementptr inbounds ([4 x i32], [4 x i32] addrspace(3)* @foo, i32 0, i32 0), align 4
   %val1 = load i32, i32 addrspace(3)* getelementptr inbounds ([4 x i32], [4 x i32] addrspace(3)* @foo, i32 0, i32 1), align 4
   %sum = add i32 %val0, %val1
   store i32 %sum, i32 addrspace(1)* %out, align 4
   ret void
 }
 
 ; GCN-LABEL: @load_constant_disjoint_offsets
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
-; GCN-DAG: v_mov_b32_e32 [[ZERO:v[0-9]+]], 0{{$}}
-; GCN: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[ZERO]] offset1:2
+; GCN-DAG: v_mov_b32_e32 [[PTR:v[0-9]+]], foo@abs32@lo{{$}}
+; GCN: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[PTR]] offset1:2
 define amdgpu_kernel void @load_constant_disjoint_offsets(i32 addrspace(1)* %out) {
   %val0 = load i32, i32 addrspace(3)* getelementptr inbounds ([4 x i32], [4 x i32] addrspace(3)* @foo, i32 0, i32 0), align 4
   %val1 = load i32, i32 addrspace(3)* getelementptr inbounds ([4 x i32], [4 x i32] addrspace(3)* @foo, i32 0, i32 2), align 4
   %sum = add i32 %val0, %val1
   store i32 %sum, i32 addrspace(1)* %out, align 4
   ret void
 }
 
 @bar = addrspace(3) global [4 x i64] undef, align 4
 
 ; GCN-LABEL: @load_misaligned64_constant_offsets
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
-; GCN-DAG: v_mov_b32_e32 [[ZERO:v[0-9]+]], 0{{$}}
-; GCN: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[ZERO]] offset1:1
-; GCN: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[ZERO]] offset0:2 offset1:3
+; GCN-DAG: v_mov_b32_e32 [[PTR:v[0-9]+]], bar@abs32@lo{{$}}
+; GCN: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[PTR]] offset1:1
+; GCN: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[PTR]] offset0:2 offset1:3
 define amdgpu_kernel void @load_misaligned64_constant_offsets(i64 addrspace(1)* %out) {
   %val0 = load i64, i64 addrspace(3)* getelementptr inbounds ([4 x i64], [4 x i64] addrspace(3)* @bar, i32 0, i32 0), align 4
   %val1 = load i64, i64 addrspace(3)* getelementptr inbounds ([4 x i64], [4 x i64] addrspace(3)* @bar, i32 0, i32 1), align 4
   %sum = add i64 %val0, %val1
   store i64 %sum, i64 addrspace(1)* %out, align 8
   ret void
 }
 
 @bar.large = addrspace(3) global [4096 x i64] undef, align 4
 
 ; GCN-LABEL: @load_misaligned64_constant_large_offsets
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
-; GCN-DAG: v_mov_b32_e32 [[BASE0:v[0-9]+]], 0x7ff8{{$}}
-; GCN-DAG: v_mov_b32_e32 [[BASE1:v[0-9]+]], 0x4000
-; GCN-DAG: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[BASE0]] offset1:1
-; GCN-DAG: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[BASE1]] offset1:1
+; GCN-DAG: s_mov_b32 [[SBASE0:s[0-9]+]], bar.large@abs32@lo
+; GCN-DAG: s_add_i32 [[SBASE1:s[0-9]+]], [[SBASE0]], 0x4000{{$}}
+; GCN-DAG: s_addk_i32 [[SBASE0]], 0x7ff8{{$}}
+; GCN-DAG: v_mov_b32_e32 [[VBASE0:v[0-9]+]], [[SBASE0]]
+; GCN-DAG: v_mov_b32_e32 [[VBASE1:v[0-9]+]], [[SBASE1]]
+; GCN-DAG: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[VBASE0]] offset1:1
+; GCN-DAG: ds_read2_b32 v{{\[[0-9]+:[0-9]+\]}}, [[VBASE1]] offset1:1
 ; GCN: s_endpgm
 define amdgpu_kernel void @load_misaligned64_constant_large_offsets(i64 addrspace(1)* %out) {
   %val0 = load i64, i64 addrspace(3)* getelementptr inbounds ([4096 x i64], [4096 x i64] addrspace(3)* @bar.large, i32 0, i32 2048), align 4
   %val1 = load i64, i64 addrspace(3)* getelementptr inbounds ([4096 x i64], [4096 x i64] addrspace(3)* @bar.large, i32 0, i32 4095), align 4
   %sum = add i64 %val0, %val1
   store i64 %sum, i64 addrspace(1)* %out, align 8
   ret void
 }

test/CodeGen/AMDGPU/ds_write2.ll

 ; 2 data subregisters from different super registers.
 ; GCN-LABEL: {{^}}simple_write2_two_val_subreg2_mixed_f32:
 ; GFX9-NOT: m0
 
 ; CI: buffer_load_dwordx2 v{{\[}}[[VAL0:[0-9]+]]:{{[0-9]+\]}}
 ; CI: buffer_load_dwordx2 v{{\[[0-9]+}}:[[VAL1:[0-9]+]]{{\]}}
 ; CI-DAG: s_mov_b32 m0
 
-; GCN-DAG: v_lshlrev_b32_e32 [[VPTR:v[0-9]+]], 2, v{{[0-9]+}}
+; CI-DAG: v_lshlrev_b32_e32 [[VOFS:v[0-9]+]], 2, v{{[0-9]+}}
+; CI-DAG: v_add_i32_e32 [[VPTR:v[0-9]+]], vcc, lds@abs32@lo, [[VOFS]]
+;
+; TODO: This should be an s_mov_b32. The v_mov_b32 gets introduced by an
+;       early legalization of the constant bus constraint on the v_lshl_add_u32,
+;       and then SIFoldOperands folds in an unlucky order.
+; GFX9-DAG: v_mov_b32_e32 [[VBASE:v[0-9]+]], lds@abs32@lo
+; GFX9-DAG: v_lshl_add_u32 [[VPTR:v[0-9]+]], {{v[0-9]+}}, 2, [[VBASE]]
 
-; GFX9: global_load_dwordx2 v{{\[}}[[VAL0:[0-9]+]]:{{[0-9]+\]}}
-; GFX9: global_load_dwordx2 v{{\[[0-9]+}}:[[VAL1:[0-9]+]]{{\]}}
+; GFX9-DAG: global_load_dwordx2 v{{\[}}[[VAL0:[0-9]+]]:{{[0-9]+\]}}
+; GFX9-DAG: global_load_dwordx2 v{{\[[0-9]+}}:[[VAL1:[0-9]+]]{{\]}}
 
 ; GCN: ds_write2_b32 [[VPTR]], v[[VAL0]], v[[VAL1]] offset1:8
 ; GCN: s_endpgm
 define amdgpu_kernel void @simple_write2_two_val_subreg2_mixed_f32(float addrspace(1)* %C, <2 x float> addrspace(1)* %in) #0 {
   %x.i = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %in.gep.0 = getelementptr <2 x float>, <2 x float> addrspace(1)* %in, i32 %x.i
   %in.gep.1 = getelementptr <2 x float>, <2 x float> addrspace(1)* %in.gep.0, i32 1
   %val0 = load volatile <2 x float>, <2 x float> addrspace(1)* %in.gep.0, align 8
   %val1 = load volatile <2 x float>, <2 x float> addrspace(1)* %in.gep.1, align 8
   %val0.0 = extractelement <2 x float> %val0, i32 0
   %val1.1 = extractelement <2 x float> %val1, i32 1
   %arrayidx0 = getelementptr inbounds [512 x float], [512 x float] addrspace(3)* @lds, i32 0, i32 %x.i
   store float %val0.0, float addrspace(3)* %arrayidx0, align 4
   %add.x = add nsw i32 %x.i, 8
   %arrayidx1 = getelementptr inbounds [512 x float], [512 x float] addrspace(3)* @lds, i32 0, i32 %add.x
   store float %val1.1, float addrspace(3)* %arrayidx1, align 4
   ret void
 }
 
 ; GCN-LABEL: @simple_write2_two_val_subreg2_f32
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
 ; GCN-DAG: {{buffer|global}}_load_dwordx2 v{{\[}}[[VAL0:[0-9]+]]:[[VAL1:[0-9]+]]{{\]}}
-; GCN-DAG: v_lshlrev_b32_e32 [[VPTR:v[0-9]+]], 2, v{{[0-9]+}}
+
+; CI-DAG: v_lshlrev_b32_e32 [[VOFS:v[0-9]+]], 2, v{{[0-9]+}}
+; CI-DAG: v_add_i32_e32 [[VPTR:v[0-9]+]], vcc, lds@abs32@lo, [[VOFS]]
+; GFX9-DAG: v_mov_b32_e32 [[VBASE:v[0-9]+]], lds@abs32@lo
+; GFX9-DAG: v_lshl_add_u32 [[VPTR:v[0-9]+]], v{{[0-9]+}}, 2, [[VBASE]]
+
 ; GCN: ds_write2_b32 [[VPTR]], v[[VAL0]], v[[VAL1]] offset1:8
 ; GCN: s_endpgm
 define amdgpu_kernel void @simple_write2_two_val_subreg2_f32(float addrspace(1)* %C, <2 x float> addrspace(1)* %in) #0 {
   %x.i = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %in.gep = getelementptr <2 x float>, <2 x float> addrspace(1)* %in, i32 %x.i
   %val = load <2 x float>, <2 x float> addrspace(1)* %in.gep, align 8
   %val0 = extractelement <2 x float> %val, i32 0
   %val1 = extractelement <2 x float> %val, i32 1
   %arrayidx0 = getelementptr inbounds [512 x float], [512 x float] addrspace(3)* @lds, i32 0, i32 %x.i
   store float %val0, float addrspace(3)* %arrayidx0, align 4
   %add.x = add nsw i32 %x.i, 8
   %arrayidx1 = getelementptr inbounds [512 x float], [512 x float] addrspace(3)* @lds, i32 0, i32 %add.x
   store float %val1, float addrspace(3)* %arrayidx1, align 4
   ret void
 }
 
 ; GCN-LABEL: @simple_write2_two_val_subreg4_f32
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
 ; GCN-DAG: {{buffer|global}}_load_dwordx4 v{{\[}}[[VAL0:[0-9]+]]:[[VAL1:[0-9]+]]{{\]}}
-; GCN-DAG: v_lshlrev_b32_e32 [[VPTR:v[0-9]+]], 2, v{{[0-9]+}}
+
+; CI-DAG: v_lshlrev_b32_e32 [[VOFS:v[0-9]+]], 2, v{{[0-9]+}}
+; CI-DAG: v_add_i32_e32 [[VPTR:v[0-9]+]], vcc, lds@abs32@lo, [[VOFS]]
+; GFX9-DAG: v_mov_b32_e32 [[VBASE:v[0-9]+]], lds@abs32@lo
+; GFX9-DAG: v_lshl_add_u32 [[VPTR:v[0-9]+]], v{{[0-9]+}}, 2, [[VBASE]]
+
 ; GCN: ds_write2_b32 [[VPTR]], v[[VAL0]], v[[VAL1]] offset1:8
 ; GCN: s_endpgm
 define amdgpu_kernel void @simple_write2_two_val_subreg4_f32(float addrspace(1)* %C, <4 x float> addrspace(1)* %in) #0 {
   %x.i = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %in.gep = getelementptr <4 x float>, <4 x float> addrspace(1)* %in, i32 %x.i
   %val = load <4 x float>, <4 x float> addrspace(1)* %in.gep, align 16
   %val0 = extractelement <4 x float> %val, i32 0
   %val1 = extractelement <4 x float> %val, i32 3

 }
 
 @foo = addrspace(3) global [4 x i32] undef, align 4
 
 ; GCN-LABEL: @store_constant_adjacent_offsets
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
-; GCN-DAG: v_mov_b32_e32 [[ZERO:v[0-9]+]], 0{{$}}
-; GCN: ds_write2_b32 [[ZERO]], v{{[0-9]+}}, v{{[0-9]+}} offset1:1
+; GCN-DAG: v_mov_b32_e32 [[PTR:v[0-9]+]], foo@abs32@lo{{$}}
+; GCN: ds_write2_b32 [[PTR]], v{{[0-9]+}}, v{{[0-9]+}} offset1:1
 define amdgpu_kernel void @store_constant_adjacent_offsets() {
   store i32 123, i32 addrspace(3)* getelementptr inbounds ([4 x i32], [4 x i32] addrspace(3)* @foo, i32 0, i32 0), align 4
   store i32 123, i32 addrspace(3)* getelementptr inbounds ([4 x i32], [4 x i32] addrspace(3)* @foo, i32 0, i32 1), align 4
   ret void
 }
 
 ; GCN-LABEL: @store_constant_disjoint_offsets
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
 ; GCN-DAG: v_mov_b32_e32 [[VAL:v[0-9]+]], 0x7b{{$}}
-; GCN-DAG: v_mov_b32_e32 [[ZERO:v[0-9]+]], 0{{$}}
-; GCN: ds_write2_b32 [[ZERO]], [[VAL]], [[VAL]] offset1:2
+; GCN-DAG: v_mov_b32_e32 [[PTR:v[0-9]+]], foo@abs32@lo{{$}}
+; GCN: ds_write2_b32 [[PTR]], [[VAL]], [[VAL]] offset1:2
 define amdgpu_kernel void @store_constant_disjoint_offsets() {
   store i32 123, i32 addrspace(3)* getelementptr inbounds ([4 x i32], [4 x i32] addrspace(3)* @foo, i32 0, i32 0), align 4
   store i32 123, i32 addrspace(3)* getelementptr inbounds ([4 x i32], [4 x i32] addrspace(3)* @foo, i32 0, i32 2), align 4
   ret void
 }
 
 @bar = addrspace(3) global [4 x i64] undef, align 4
 
 ; GCN-LABEL: @store_misaligned64_constant_offsets
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
-; GCN-DAG: v_mov_b32_e32 [[ZERO:v[0-9]+]], 0{{$}}
-; GCN-DAG: ds_write2_b32 [[ZERO]], v{{[0-9]+}}, v{{[0-9]+}} offset1:1
-; GCN-DAG: ds_write2_b32 [[ZERO]], v{{[0-9]+}}, v{{[0-9]+}} offset0:2 offset1:3
+; GCN-DAG: v_mov_b32_e32 [[PTR:v[0-9]+]], bar@abs32@lo{{$}}
+; GCN-DAG: ds_write2_b32 [[PTR]], v{{[0-9]+}}, v{{[0-9]+}} offset1:1
+; GCN-DAG: ds_write2_b32 [[PTR]], v{{[0-9]+}}, v{{[0-9]+}} offset0:2 offset1:3
 ; GCN: s_endpgm
 define amdgpu_kernel void @store_misaligned64_constant_offsets() {
   store i64 123, i64 addrspace(3)* getelementptr inbounds ([4 x i64], [4 x i64] addrspace(3)* @bar, i32 0, i32 0), align 4
   store i64 123, i64 addrspace(3)* getelementptr inbounds ([4 x i64], [4 x i64] addrspace(3)* @bar, i32 0, i32 1), align 4
   ret void
 }
 
 @bar.large = addrspace(3) global [4096 x i64] undef, align 4
 
 ; GCN-LABEL: @store_misaligned64_constant_large_offsets
 ; CI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
-; GCN-DAG: v_mov_b32_e32 [[BASE0:v[0-9]+]], 0x7ff8{{$}}
-; GCN-DAG: v_mov_b32_e32 [[BASE1:v[0-9]+]], 0x4000{{$}}
-; GCN-DAG: ds_write2_b32 [[BASE0]], v{{[0-9]+}}, v{{[0-9]+}} offset1:1
-; GCN-DAG: ds_write2_b32 [[BASE1]], v{{[0-9]+}}, v{{[0-9]+}} offset1:1
+; GCN-DAG: s_mov_b32 [[SBASE0:s[0-9]+]], bar.large@abs32@lo
+; GCN-DAG: s_add_i32 [[SBASE1:s[0-9]+]], [[SBASE0]], 0x4000{{$}}
+; GCN-DAG: s_addk_i32 [[SBASE0]], 0x7ff8{{$}}
+; GCN-DAG: v_mov_b32_e32 [[VBASE0:v[0-9]+]], [[SBASE0]]{{$}}
+; GCN-DAG: v_mov_b32_e32 [[VBASE1:v[0-9]+]], [[SBASE1]]{{$}}
+; GCN-DAG: ds_write2_b32 [[VBASE0]], v{{[0-9]+}}, v{{[0-9]+}} offset1:1
+; GCN-DAG: ds_write2_b32 [[VBASE1]], v{{[0-9]+}}, v{{[0-9]+}} offset1:1
 ; GCN: s_endpgm
 define amdgpu_kernel void @store_misaligned64_constant_large_offsets() {
   store i64 123, i64 addrspace(3)* getelementptr inbounds ([4096 x i64], [4096 x i64] addrspace(3)* @bar.large, i32 0, i32 2048), align 4
   store i64 123, i64 addrspace(3)* getelementptr inbounds ([4096 x i64], [4096 x i64] addrspace(3)* @bar.large, i32 0, i32 4095), align 4
   ret void
 }
 
 @sgemm.lA = internal unnamed_addr addrspace(3) global [264 x float] undef, align 4

test/CodeGen/AMDGPU/lds-initializer.ll

 ; RUN: not llc -march=amdgcn -mcpu=tahiti < %s 2>&1 | FileCheck %s
 ; RUN: not llc -march=amdgcn -mcpu=tonga < %s 2>&1 | FileCheck %s
 
-; CHECK: in function load_init_lds_global{{.*}}: unsupported initializer for address space
+; CHECK: lds: unsupported initializer for address space
 
 @lds = addrspace(3) global [8 x i32] [i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8]
 
 define amdgpu_kernel void @load_init_lds_global(i32 addrspace(1)* %out, i1 %p) {
  %gep = getelementptr [8 x i32], [8 x i32] addrspace(3)* @lds, i32 0, i32 10
   %ld = load i32, i32 addrspace(3)* %gep
   store i32 %ld, i32 addrspace(1)* %out
   ret void
 }

test/CodeGen/AMDGPU/lds-relocs.ll

+; RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -verify-machineinstrs -show-mc-encoding < %s | FileCheck -check-prefixes=GCN %s
+; RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -filetype=obj < %s | llvm-readobj -r -t | FileCheck -check-prefixes=ELF %s
+
[e-mail] = external unnamed_addr addrspace(3) global [0 x i32]
[e-mail] = unnamed_addr addrspace(3) global [8 x i32] undef, align 8
+
+; ELF:      Relocations [
+; ELF-NEXT:   Section (3) .rel.text {
+; ELF-NEXT:     0x{{[0-9a-f]*}} R_AMDGPU_ABS32 lds.external 0x0
+; ELF-NEXT:     0x{{[0-9a-f]*}} R_AMDGPU_ABS32 lds.defined 0x0
+; ELF-NEXT:   }
+; ELF-NEXT: ]
+
+; ELF:      Symbol {
+; ELF:        Name: lds.defined
+; ELF-NEXT:   Value: 0x8
+; ELF-NEXT:   Size: 32
+; ELF-NEXT:   Binding: Global (0x1)
+; ELF-NEXT:   Type: Object (0x1)
+; ELF-NEXT:   Other: 0
+; ELF-NEXT:   Section: Processor Specific (0xFF00)
+; ELF-NEXT: }
+
+; ELF:      Symbol {
+; ELF:        Name: lds.external
+; ELF-NEXT:   Value: 0x4
+; ELF-NEXT:   Size: 0
+; ELF-NEXT:   Binding: Global (0x1)
+; ELF-NEXT:   Type: Object (0x1)
+; ELF-NEXT:   Other: 0
+; ELF-NEXT:   Section: Processor Specific (0xFF00)
+; ELF-NEXT: }
+
+; GCN-LABEL: {{^}}test_basic:
+; GCN: v_mov_b32_e32 v1, lds.external@abs32@lo ; encoding: [0xff,0x02,0x02,0x7e,A,A,A,A]
+; GCN-NEXT:              ; fixup A - offset: 4, value: lds.external@abs32@lo, kind: FK_Data_4{{$}}
+;
+; GCN: s_add_i32 s0, lds.defined@abs32@lo, s0 ; encoding: [0xff,0x00,0x00,0x81,A,A,A,A]
+; GCN-NEXT:          ; fixup A - offset: 4, value: lds.defined@abs32@lo, kind: FK_Data_4{{$}}
+;
+; GCN: .globl lds.external
+; GCN: .amdgpu_lds lds.external, 0, 4
+; GCN: .globl lds.defined
+; GCN: .amdgpu_lds lds.defined, 32, 8
+define amdgpu_gs float @test_basic(i32 inreg %wave, i32 %arg1) #0 {
+main_body:
+  %gep0 = getelementptr [0 x i32], [0 x i32] addrspace(3)* @lds.external, i32 0, i32 %arg1
+  %tmp = load i32, i32 addrspace(3)* %gep0
+
+  %mask = call i64 @llvm.amdgcn.icmp.i64.i32(i32 %tmp, i32 0, i32 0)
+  %mask.32 = trunc i64 %mask to i32
+  %gep1 = getelementptr [8 x i32], [8 x i32] addrspace(3)* @lds.defined, i32 0, i32 %wave
+  store i32 %mask.32, i32 addrspace(3)* %gep1
+
+  %r = bitcast i32 %tmp to float
+  ret float %r
+}
+
+; Function Attrs: convergent nounwind readnone
+declare i64 @llvm.amdgcn.icmp.i64.i32(i32, i32, i32) #4
+
+attributes #0 = { "no-signed-zeros-fp-math"="true" }
+attributes #4 = { convergent nounwind readnone }

test/CodeGen/AMDGPU/lds-size.ll

-; RUN: llc -march=amdgcn < %s | FileCheck -check-prefix=ALL -check-prefix=GCN %s
 ; RUN: llc -mtriple=amdgcn-amd-amdhsa < %s | FileCheck -check-prefix=ALL -check-prefix=HSA %s
 ; RUN: llc -march=r600 -mcpu=redwood < %s | FileCheck -check-prefix=ALL -check-prefix=EG %s
 
 ; This test makes sure we do not double count global values when they are
 ; used in different basic blocks.
 
 ; GCN: .long 47180
 ; GCN-NEXT: .long 32900

test/CodeGen/AMDGPU/lds-zero-initializer.ll

 ; RUN: not llc -march=amdgcn -mcpu=tahiti < %s 2>&1 | FileCheck %s
 ; RUN: not llc -march=amdgcn -mcpu=tonga < %s 2>&1 | FileCheck %s
 
-; CHECK: in function load_zeroinit_lds_global{{.*}}: unsupported initializer for address space
+; CHECK: lds: unsupported initializer for address space
 
 @lds = addrspace(3) global [256 x i32] zeroinitializer
 
 define amdgpu_kernel void @load_zeroinit_lds_global(i32 addrspace(1)* %out, i1 %p) {
  %gep = getelementptr [256 x i32], [256 x i32] addrspace(3)* @lds, i32 0, i32 10
   %ld = load i32, i32 addrspace(3)* %gep
   store i32 %ld, i32 addrspace(1)* %out
   ret void
 }

test/CodeGen/AMDGPU/llvm.amdgcn.atomic.dec.ll

 }
 
 @lds0 = addrspace(3) global [512 x i32] undef
 
 ; GCN-LABEL: {{^}}atomic_dec_shl_base_lds_0:
 ; CIVI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
-; GCN-DAG: v_lshlrev_b32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; CIVI-DAG: v_lshlrev_b32_e32 [[OFS:v[0-9]+]], 2, {{v[0-9]+}}
+; CIVI-DAG: v_add_{{[ui]}}32_e32 [[PTR:v[0-9]+]], vcc, lds0@abs32@lo, [[OFS]]
+; GFX9-DAG: s_mov_b32 [[BASE:s[0-9]+]], lds0@abs32@lo
+; GFX9-DAG: v_lshl_add_u32 [[PTR:v[0-9]+]], {{v[0-9]+}}, 2, [[BASE]]
+
 ; GCN: ds_dec_rtn_u32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}} offset:8
 define amdgpu_kernel void @atomic_dec_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
   %tid.x = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %idx.0 = add nsw i32 %tid.x, 2
   %arrayidx0 = getelementptr inbounds [512 x i32], [512 x i32] addrspace(3)* @lds0, i32 0, i32 %idx.0
   %val0 = call i32 @llvm.amdgcn.atomic.dec.i32.p3i32(i32 addrspace(3)* %arrayidx0, i32 9, i32 0, i32 0, i1 false)
   store i32 %idx.0, i32 addrspace(1)* %add_use
   store i32 %val0, i32 addrspace(1)* %out

 }
 
 @lds1 = addrspace(3) global [512 x i64] undef, align 8
 
 ; GCN-LABEL: {{^}}atomic_dec_shl_base_lds_0_i64:
 ; CIVI-DAG: s_mov_b32 m0
 ; GFX9-NOT: m0
 
-; GCN-DAG: v_lshlrev_b32_e32 [[PTR:v[0-9]+]], 3, {{v[0-9]+}}
+; CIVI-DAG: v_lshlrev_b32_e32 [[OFS:v[0-9]+]], 3, {{v[0-9]+}}
+; CIVI-DAG: v_add_{{[ui]}}32_e32 [[PTR:v[0-9]+]], vcc, lds1@abs32@lo, [[OFS]]
+; GFX9-DAG: v_mov_b32_e32 [[BASE:v[0-9]+]], lds1@abs32@lo
+; GFX9-DAG: v_lshl_add_u32 [[PTR:v[0-9]+]], {{v[0-9]+}}, 3, [[BASE]]
+
 ; GCN: ds_dec_rtn_u64 v{{\[[0-9]+:[0-9]+\]}}, [[PTR]], v{{\[[0-9]+:[0-9]+\]}} offset:16
 define amdgpu_kernel void @atomic_dec_shl_base_lds_0_i64(i64 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
   %tid.x = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %idx.0 = add nsw i32 %tid.x, 2
   %arrayidx0 = getelementptr inbounds [512 x i64], [512 x i64] addrspace(3)* @lds1, i32 0, i32 %idx.0
   %val0 = call i64 @llvm.amdgcn.atomic.dec.i64.p3i64(i64 addrspace(3)* %arrayidx0, i64 9, i32 0, i32 0, i1 false)
   store i32 %idx.0, i32 addrspace(1)* %add_use
   store i64 %val0, i64 addrspace(1)* %out
   ret void
 }
 
 attributes #0 = { nounwind }
 attributes #1 = { nounwind readnone }
 attributes #2 = { nounwind argmemonly }

test/CodeGen/AMDGPU/llvm.amdgcn.atomic.inc.ll

define amdgpu_kernel void @global_atomic_inc_noret_i32_offset_addr64(i32 addrspace(1)* %ptr) #0 {
   %gep = getelementptr i32, i32 addrspace(1)* %gep.tid, i32 5
   %result = call i32 @llvm.amdgcn.atomic.inc.i32.p1i32(i32 addrspace(1)* %gep, i32 42, i32 0, i32 0, i1 false)
   ret void
 }
 
 @lds0 = addrspace(3) global [512 x i32] undef, align 4
 
 ; GCN-LABEL: {{^}}atomic_inc_shl_base_lds_0_i32:
-; GCN: v_lshlrev_b32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; CIVI-DAG: v_lshlrev_b32_e32 [[OFS:v[0-9]+]], 2, {{v[0-9]+}}
+; CIVI-DAG: v_add_{{[ui]}}32_e32 [[PTR:v[0-9]+]], vcc, lds0@abs32@lo, [[OFS]]
+; GFX9-DAG: s_mov_b32 [[BASE:s[0-9]+]], lds0@abs32@lo
+; GFX9-DAG: v_lshl_add_u32 [[PTR:v[0-9]+]], {{v[0-9]+}}, 2, [[BASE]]
 ; GCN: ds_inc_rtn_u32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}} offset:8
 define amdgpu_kernel void @atomic_inc_shl_base_lds_0_i32(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
   %tid.x = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %idx.0 = add nsw i32 %tid.x, 2
   %arrayidx0 = getelementptr inbounds [512 x i32], [512 x i32] addrspace(3)* @lds0, i32 0, i32 %idx.0
   %val0 = call i32 @llvm.amdgcn.atomic.inc.i32.p3i32(i32 addrspace(3)* %arrayidx0, i32 9, i32 0, i32 0, i1 false)
   store i32 %idx.0, i32 addrspace(1)* %add_use
   store i32 %val0, i32 addrspace(1)* %out
define amdgpu_kernel void @flat_atomic_inc_noret_i32_offset_addr64(i32* %ptr) #0 {
   %gep = getelementptr i32, i32* %gep.tid, i32 5
   %result = call i32 @llvm.amdgcn.atomic.inc.i32.p0i32(i32* %gep, i32 42, i32 0, i32 0, i1 false)
   ret void
 }
 
 @lds1 = addrspace(3) global [512 x i64] undef, align 8
 
 ; GCN-LABEL: {{^}}atomic_inc_shl_base_lds_0_i64:
-; GCN: v_lshlrev_b32_e32 [[PTR:v[0-9]+]], 3, {{v[0-9]+}}
+; CIVI-DAG: v_lshlrev_b32_e32 [[OFS:v[0-9]+]], 3, {{v[0-9]+}}
+; CIVI-DAG: v_add_{{[ui]}}32_e32 [[PTR:v[0-9]+]], vcc, lds1@abs32@lo, [[OFS]]
+; GFX9-DAG: v_mov_b32_e32 [[BASE:v[0-9]+]], lds1@abs32@lo
+; GFX9-DAG: v_lshl_add_u32 [[PTR:v[0-9]+]], {{v[0-9]+}}, 3, [[BASE]]
 ; GCN: ds_inc_rtn_u64 v{{\[[0-9]+:[0-9]+\]}}, [[PTR]], v{{\[[0-9]+:[0-9]+\]}} offset:16
 define amdgpu_kernel void @atomic_inc_shl_base_lds_0_i64(i64 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
   %tid.x = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %idx.0 = add nsw i32 %tid.x, 2
   %arrayidx0 = getelementptr inbounds [512 x i64], [512 x i64] addrspace(3)* @lds1, i32 0, i32 %idx.0
   %val0 = call i64 @llvm.amdgcn.atomic.inc.i64.p3i64(i64 addrspace(3)* %arrayidx0, i64 9, i32 0, i32 0, i1 false)
   store i32 %idx.0, i32 addrspace(1)* %add_use
   store i64 %val0, i64 addrspace(1)* %out

test/CodeGen/AMDGPU/llvm.amdgcn.groupstaticsize.ll

-; RUN: llc -march=amdgcn -mcpu=tahiti -verify-machineinstrs < %s | FileCheck %s
-; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=kaveri -verify-machineinstrs < %s | FileCheck %s
-; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=fiji -verify-machineinstrs < %s | FileCheck %s
+; RUN: llc -march=amdgcn -mcpu=tahiti -verify-machineinstrs < %s | FileCheck -check-prefixes=CHECK,NOHSA %s
+; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=kaveri -verify-machineinstrs < %s | FileCheck -check-prefixes=CHECK,HSA %s
+; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=fiji -verify-machineinstrs < %s | FileCheck -check-prefixes=CHECK,HSA %s
 
 @lds0 = addrspace(3) global [512 x float] undef, align 4
 @lds1 = addrspace(3) global [256 x float] undef, align 4
 
 @large = addrspace(3) global [4096 x i32] undef, align 4
 
 ; CHECK-LABEL: {{^}}groupstaticsize_test0:
-; CHECK: v_mov_b32_e32 v{{[0-9]+}}, 0x800{{$}}
+; NOHSA: v_mov_b32_e32 v{{[0-9]+}}, llvm.amdgcn.groupstaticsize@abs32@lo
+; HSA: v_mov_b32_e32 v{{[0-9]+}}, 0x800{{$}}
 define amdgpu_kernel void @groupstaticsize_test0(float addrspace(1)* %out, i32 addrspace(1)* %lds_size) #0 {
   %tid.x = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %idx.0 = add nsw i32 %tid.x, 64
   %static_lds_size = call i32 @llvm.amdgcn.groupstaticsize() #1
   store i32 %static_lds_size, i32 addrspace(1)* %lds_size, align 4
   %arrayidx0 = getelementptr inbounds [512 x float], [512 x float] addrspace(3)* @lds0, i32 0, i32 %idx.0
   %val0 = load float, float addrspace(3)* %arrayidx0, align 4
   store float %val0, float addrspace(1)* %out, align 4
 
   ret void
 }
 
 ; CHECK-LABEL: {{^}}groupstaticsize_test1:
-; CHECK: v_mov_b32_e32 v{{[0-9]+}}, 0xc00{{$}}
+; NOHSA: v_mov_b32_e32 v{{[0-9]+}}, llvm.amdgcn.groupstaticsize@abs32@lo
+; HSA: v_mov_b32_e32 v{{[0-9]+}}, 0xc00{{$}}
 define amdgpu_kernel void @groupstaticsize_test1(float addrspace(1)* %out, i32 %cond, i32 addrspace(1)* %lds_size) {
 entry:
   %static_lds_size = call i32 @llvm.amdgcn.groupstaticsize() #1
   store i32 %static_lds_size, i32 addrspace(1)* %lds_size, align 4
   %tid.x = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %idx.0 = add nsw i32 %tid.x, 64
   %tmp = icmp eq i32 %cond, 0
   br i1 %tmp, label %if, label %else
else:                                             ; preds = %entry
   br label %endif
 
 endif:                                            ; preds = %else, %if
   ret void
 }
 
 ; Exceeds 16-bit simm limit of s_movk_i32
 ; CHECK-LABEL: {{^}}large_groupstaticsize:
-; CHECK: v_mov_b32_e32 [[REG:v[0-9]+]], 0x4000{{$}}
+; NOHSA: v_mov_b32_e32 v{{[0-9]+}}, llvm.amdgcn.groupstaticsize@abs32@lo
+; HSA: v_mov_b32_e32 [[REG:v[0-9]+]], 0x4000{{$}}
 define amdgpu_kernel void @large_groupstaticsize(i32 addrspace(1)* %size, i32 %idx) #0 {
   %gep = getelementptr inbounds [4096 x i32], [4096 x i32] addrspace(3)* @large, i32 0, i32 %idx
   store volatile i32 0, i32 addrspace(3)* %gep
   %static_lds_size = call i32 @llvm.amdgcn.groupstaticsize()
   store i32 %static_lds_size, i32 addrspace(1)* %size
   ret void
 }
 
 declare i32 @llvm.amdgcn.groupstaticsize() #1
 declare i32 @llvm.amdgcn.workitem.id.x() #1
 
 attributes #0 = { nounwind }
 attributes #1 = { nounwind readnone }

test/CodeGen/AMDGPU/local-memory.amdgcn.ll

 ; RUN: llc -march=amdgcn -mcpu=verde -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=GCN %s
 ; RUN: llc -march=amdgcn -mcpu=bonaire -verify-machineinstrs < %s | FileCheck -check-prefix=CI -check-prefix=GCN %s
 
 @local_memory.local_mem = internal unnamed_addr addrspace(3) global [128 x i32] undef, align 4
 
-; Check that the LDS size emitted correctly
-; SI: .long 47180
-; SI-NEXT: .long 65668
-; CI: .long 47180
-; CI-NEXT: .long 32900
-
 ; GCN-LABEL: {{^}}local_memory:
 
 ; GCN-NOT: s_wqm_b64
 ; GCN: ds_write_b32
 
 ; GCN: s_barrier
 
 ; GCN: ds_read_b32 {{v[0-9]+}},

 ; SI-DAG: v_sub_i32_e32 [[SUB0:v[0-9]+]], vcc, 28, [[ADDRW]]
 ; SI-DAG: v_sub_i32_e32 [[SUB1:v[0-9]+]], vcc, 12, [[ADDRW]]
 
 ; SI-DAG: ds_read_b32 v{{[0-9]+}}, [[SUB0]]
 ; SI-DAG: ds_read_b32 v{{[0-9]+}}, [[SUB1]]
 
 ; CI: v_sub_i32_e32 [[SUB:v[0-9]+]], vcc, 0, [[ADDRW]]
 ; CI: ds_read2_b32 {{v\[[0-9]+:[0-9]+\]}}, [[SUB]] offset0:3 offset1:7
+
 define amdgpu_kernel void @local_memory_two_objects(i32 addrspace(1)* %out) #0 {
 entry:
   %x.i = call i32 @llvm.amdgcn.workitem.id.x()
   %arrayidx = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* @local_memory_two_objects.local_mem0, i32 0, i32 %x.i
   store i32 %x.i, i32 addrspace(3)* %arrayidx, align 4
   %mul = shl nsw i32 %x.i, 1
   %arrayidx1 = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* @local_memory_two_objects.local_mem1, i32 0, i32 %x.i
   store i32 %mul, i32 addrspace(3)* %arrayidx1, align 4

test/CodeGen/AMDGPU/local-memory.ll

 ; RUN: llc -march=amdgcn -mcpu=verde -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
 ; RUN: llc -march=amdgcn -mcpu=bonaire -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
 ; RUN: llc -march=r600 -mcpu=redwood < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
 
 @local_memory.local_mem = internal unnamed_addr addrspace(3) global [128 x i32] undef, align 4
 
 @lds = addrspace(3) global [512 x i32] undef, align 4
 
 ; On SI we need to make sure that the base offset is a register and
 ; not an immediate.
 
 ; FUNC-LABEL: {{^}}load_i32_local_const_ptr:
-; GCN: v_mov_b32_e32 v[[ZERO:[0-9]+]], 0
-; GCN: ds_read_b32 v{{[0-9]+}}, v[[ZERO]] offset:4
+; GCN: v_mov_b32_e32 v[[PTR:[0-9]+]], lds@abs32@lo
+; GCN: ds_read_b32 v{{[0-9]+}}, v[[PTR]] offset:4
 
 ; R600: LDS_READ_RET
 define amdgpu_kernel void @load_i32_local_const_ptr(i32 addrspace(1)* %out, i32 addrspace(3)* %in) #0 {
 entry:
   %tmp0 = getelementptr [512 x i32], [512 x i32] addrspace(3)* @lds, i32 0, i32 1
   %tmp1 = load i32, i32 addrspace(3)* %tmp0
   %tmp2 = getelementptr i32, i32 addrspace(1)* %out, i32 1
   store i32 %tmp1, i32 addrspace(1)* %tmp2

test/CodeGen/AMDGPU/merge-store-crash.ll

 ; RUN: llc -march=amdgcn -mcpu=verde -verify-machineinstrs < %s | FileCheck %s
 ; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck %s
 
 ; This is used to crash in LiveIntervalAnalysis via SILoadStoreOptimizer
 ; while fixing up the merge of two ds_write instructions.
 
 @tess_lds = external addrspace(3) global [8192 x i32]
 
 ; CHECK-LABEL: {{^}}main:
-; CHECK: ds_write2_b32
+; CHECK: ds_write_b32
+; CHECK: ds_write_b32
 ; CHECK: v_mov_b32_e32 v1, v0
 ; CHECK: tbuffer_store_format_xyzw v[0:3],
 define amdgpu_vs void @main(i32 inreg %arg) {
 main_body:
   %tmp = load float, float addrspace(3)* undef, align 4
   %tmp1 = load float, float addrspace(3)* undef, align 4
   store float %tmp, float addrspace(3)* null, align 4
   %tmp2 = bitcast float %tmp to i32

test/CodeGen/AMDGPU/over-max-lds-size.ll

-; RUN: not llc -march=amdgcn -mcpu=tahiti < %s 2>&1 | FileCheck -check-prefix=ERROR %s
-; RUN: not llc -march=amdgcn -mcpu=hawaii < %s 2>&1 | FileCheck -check-prefix=ERROR %s
-; RUN: not llc -march=amdgcn -mcpu=fiji < %s 2>&1 | FileCheck -check-prefix=ERROR %s
-
-; ERROR: error: local memory limit exceeded (400000) in use_huge_lds
-
-@huge = internal unnamed_addr addrspace(3) global [100000 x i32] undef, align 4
-
-define amdgpu_kernel void @use_huge_lds() {
-entry:
-  %v0 = getelementptr inbounds [100000 x i32], [100000 x i32] addrspace(3)* @huge, i32 0, i32 0
-  store i32 0, i32 addrspace(3)* %v0
-  ret void
-}

test/CodeGen/AMDGPU/promote-alloca-globals.ll

 ; RUN: opt -data-layout=A5 -S -mtriple=amdgcn-unknown-unknown -amdgpu-promote-alloca < %s | FileCheck -check-prefix=IR %s
 ; RUN: llc -march=amdgcn -mcpu=tonga < %s | FileCheck -check-prefix=ASM %s
 
 
 @global_array0 = internal unnamed_addr addrspace(3) global [750 x [10 x i32]] undef, align 4
 @global_array1 = internal unnamed_addr addrspace(3) global [750 x [10 x i32]] undef, align 4
 
 ; IR-LABEL: define amdgpu_kernel void @promote_alloca_size_256(i32 addrspace(1)* nocapture %out, i32 addrspace(1)* nocapture %in) {
 ; IR: alloca [10 x i32]
 ; ASM-LABEL: {{^}}promote_alloca_size_256:
-; ASM: ; LDSByteSize: 60000 bytes/workgroup (compile time only)
+; ASM: .amdgpu_lds global_array0, 30000, 4
+; ASM: .amdgpu_lds global_array1, 30000, 4
 
 define amdgpu_kernel void @promote_alloca_size_256(i32 addrspace(1)* nocapture %out, i32 addrspace(1)* nocapture %in) {
 entry:
   %stack = alloca [10 x i32], align 4, addrspace(5)
   %tmp = load i32, i32 addrspace(1)* %in, align 4
   %arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32] addrspace(5)* %stack, i32 0, i32 %tmp
   store i32 4, i32 addrspace(5)* %arrayidx1, align 4
   %arrayidx2 = getelementptr inbounds i32, i32 addrspace(1)* %in, i32 1

test/CodeGen/AMDGPU/shl_add_ptr.ll

define amdgpu_kernel void @load_shl_base_lds_0(float addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
   store float %val0, float addrspace(1)* %out
   ret void
 }
 
 ; Make sure once the first use is folded into the addressing mode, the
 ; remaining add use goes through the normal shl + add constant fold.
 
 ; GCN-LABEL: {{^}}load_shl_base_lds_1:
-; GCN: v_lshlrev_b32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; GCN: v_lshlrev_b32_e32 [[OFS:v[0-9]+]], 2, {{v[0-9]+}}
+
+; TODO: integrate into the ds_read_b32 offset using a 16-bit relocation
+; GCN: v_add_{{[iu]}}32_e32 [[PTR:v[0-9]+]], vcc, lds0@abs32@lo, [[OFS]]
+
 ; GCN: ds_read_b32 [[RESULT:v[0-9]+]], [[PTR]] offset:8
 ; GCN: v_add_{{[iu]}}32_e32 [[ADDUSE:v[0-9]+]], vcc, 8, v{{[0-9]+}}
 ; GCN-DAG: buffer_store_dword [[RESULT]]
 ; GCN-DAG: buffer_store_dword [[ADDUSE]]
 ; GCN: s_endpgm
 define amdgpu_kernel void @load_shl_base_lds_1(float addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
   %tid.x = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %idx.0 = add nsw i32 %tid.x, 2
define amdgpu_kernel void @load_shl_base_lds_max_offset(i8 addrspace(1)* %out, i8 addrspace(3)* %lds, i32 addrspace(1)* %add_use) #0 {
   store i32 %idx.0, i32 addrspace(1)* %add_use
   store i8 %val0, i8 addrspace(1)* %out
   ret void
 }
 
 ; The two globals are placed adjacent in memory, so the same base
 ; pointer can be used with an offset into the second one.
 
+; TODO: Recover the optimization of using ds_read2st64_b32 using alignment hints
+
 ; GCN-LABEL: {{^}}load_shl_base_lds_2:
-; GCN: v_lshlrev_b32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; GCN: v_lshlrev_b32_e32 [[OFS:v[0-9]+]], 2, {{v[0-9]+}}
+; GCN-DAG: v_add_{{[iu]}}32_e32 [[PTR0:v[0-9]+]], vcc, lds0@abs32@lo, [[OFS]]
+; GCN-DAG: v_add_{{[iu]}}32_e32 [[PTR1:v[0-9]+]], vcc, lds1@abs32@lo, [[OFS]]
 ; GCN: s_mov_b32 m0, -1
-; GCN-NEXT: ds_read2st64_b32 {{v\[[0-9]+:[0-9]+\]}}, [[PTR]] offset0:1 offset1:9
+
+; GCN-DAG: ds_read_b32 {{v[0-9]+}}, [[PTR0]] offset:256
+; GCN-DAG: ds_read_b32 {{v[0-9]+}}, [[PTR1]] offset:256
+; TODO: ds_read2st64_b32 {{v\[[0-9]+:[0-9]+\]}}, [[PTR]] offset0:1 offset1:9
+
 ; GCN: s_endpgm
 define amdgpu_kernel void @load_shl_base_lds_2(float addrspace(1)* %out) #0 {
   %tid.x = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %idx.0 = add nsw i32 %tid.x, 64
   %arrayidx0 = getelementptr inbounds [512 x float], [512 x float] addrspace(3)* @lds0, i32 0, i32 %idx.0
   %val0 = load float, float addrspace(3)* %arrayidx0, align 4
   %arrayidx1 = getelementptr inbounds [512 x float], [512 x float] addrspace(3)* @lds1, i32 0, i32 %idx.0
   %val1 = load float, float addrspace(3)* %arrayidx1, align 4

test/CodeGen/AMDGPU/si-sgpr-spill.ll

 ; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=TOVGPR %s
 ; RUN: llc -march=amdgcn -mcpu=tonga -mattr=-mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
 
 ; These tests check that the compiler won't crash when it needs to spill
 ; SGPRs.
 
-@ddxy_lds = external addrspace(3) global [64 x i32]
-
 ; GCN-LABEL: {{^}}main:
 ; GCN: s_wqm
 
 ; Make sure not emitting unused scratch resource descriptor setup
 ; GCN-NOT: s_mov_b32
-; GCN-NOT: s_mov_b32
-; GCN-NOT: s_mov_b32
-; GCN-NOT: s_mov_b32
 
 ; GCN: s_mov_b32 m0
 
 ; Make sure scratch space isn't being used for SGPR->VGPR spills
 
 ; Writing to M0 from an SMRD instruction will hang the GPU.
 ; GCN-NOT: s_buffer_load_dword m0
 ; GCN: s_endpgm
 
 ; TOVGPR: ScratchSize: 0{{$}}
 define amdgpu_ps void @main([17 x <4 x i32>] addrspace(4)* byval %arg, [32 x <4 x i32>] addrspace(4)* byval %arg1, [16 x <8 x i32>] addrspace(4)* byval %arg2, float inreg %arg3, i32 inreg %arg4, <2 x i32> %arg5, <2 x i32> %arg6, <2 x i32> %arg7, <3 x i32> %arg8, <2 x i32> %arg9, <2 x i32> %arg10, <2 x i32> %arg11, float %arg12, float %arg13, float %arg14, float %arg15, float %arg16, float %arg17, float %arg18, float %arg19, float %arg20) {
 main_body:
+  %lds = inttoptr i32 0 to [64 x i32] addrspace(3)*
   %tmp = getelementptr [17 x <4 x i32>], [17 x <4 x i32>] addrspace(4)* %arg, i64 0, i32 0
   %tmp21 = load <4 x i32>, <4 x i32> addrspace(4)* %tmp, !tbaa !0
   %tmp22 = call float @llvm.amdgcn.s.buffer.load.f32(<4 x i32> %tmp21, i32 96, i32 0)
   %tmp23 = call float @llvm.amdgcn.s.buffer.load.f32(<4 x i32> %tmp21, i32 100, i32 0)
   %tmp24 = call float @llvm.amdgcn.s.buffer.load.f32(<4 x i32> %tmp21, i32 104, i32 0)
   %tmp25 = call float @llvm.amdgcn.s.buffer.load.f32(<4 x i32> %tmp21, i32 112, i32 0)
   %tmp26 = call float @llvm.amdgcn.s.buffer.load.f32(<4 x i32> %tmp21, i32 116, i32 0)
   %tmp27 = call float @llvm.amdgcn.s.buffer.load.f32(<4 x i32> %tmp21, i32 120, i32 0)
main_body:
   %i.i1 = extractelement <2 x i32> %arg6, i32 0
   %j.i2 = extractelement <2 x i32> %arg6, i32 1
   %i.f.i3 = bitcast i32 %i.i1 to float
   %j.f.i4 = bitcast i32 %j.i2 to float
   %p1.i5 = call float @llvm.amdgcn.interp.p1(float %i.f.i3, i32 2, i32 5, i32 %arg4) #0
   %p2.i6 = call float @llvm.amdgcn.interp.p2(float %p1.i5, float %j.f.i4, i32 2, i32 5, i32 %arg4) #0
   %mbcnt.lo.0 = call i32 @llvm.amdgcn.mbcnt.lo(i32 -1, i32 0)
   %tmp109 = call i32 @llvm.amdgcn.mbcnt.hi(i32 -1, i32 %mbcnt.lo.0)
-  %tmp110 = getelementptr [64 x i32], [64 x i32] addrspace(3)* @ddxy_lds, i32 0, i32 %tmp109
+  %tmp110 = getelementptr [64 x i32], [64 x i32] addrspace(3)* %lds, i32 0, i32 %tmp109
   %tmp111 = bitcast float %p2.i to i32
   store i32 %tmp111, i32 addrspace(3)* %tmp110
   %tmp112 = bitcast float %p2.i96 to i32
   store i32 %tmp112, i32 addrspace(3)* %tmp110
   %mbcnt.lo.1 = call i32 @llvm.amdgcn.mbcnt.lo(i32 -1, i32 0)
   %tmp113 = call i32 @llvm.amdgcn.mbcnt.hi(i32 -1, i32 %mbcnt.lo.1)
-  %tmp114 = getelementptr [64 x i32], [64 x i32] addrspace(3)* @ddxy_lds, i32 0, i32 %tmp113
+  %tmp114 = getelementptr [64 x i32], [64 x i32] addrspace(3)* %lds, i32 0, i32 %tmp113
   %tmp115 = and i32 %tmp113, -4
-  %tmp116 = getelementptr [64 x i32], [64 x i32] addrspace(3)* @ddxy_lds, i32 0, i32 %tmp115
+  %tmp116 = getelementptr [64 x i32], [64 x i32] addrspace(3)* %lds, i32 0, i32 %tmp115
   %tmp117 = add i32 %tmp115, 1
-  %tmp118 = getelementptr [64 x i32], [64 x i32] addrspace(3)* @ddxy_lds, i32 0, i32 %tmp117
+  %tmp118 = getelementptr [64 x i32], [64 x i32] addrspace(3)* %lds, i32 0, i32 %tmp117
   %tmp119 = bitcast float %p2.i to i32
   store i32 %tmp119, i32 addrspace(3)* %tmp114
   %tmp120 = load i32, i32 addrspace(3)* %tmp116
   %tmp121 = bitcast i32 %tmp120 to float
   %tmp122 = load i32, i32 addrspace(3)* %tmp118
   %tmp123 = bitcast i32 %tmp122 to float
   %tmp124 = fsub float %tmp123, %tmp121
   %tmp125 = bitcast float %p2.i96 to i32
main_body:
   %tmp135 = extractelement <4 x float> %tmp134, i32 0
   %tmp136 = extractelement <4 x float> %tmp134, i32 1
   %tmp137 = fmul float %tmp59, %p2.i
   %tmp138 = fmul float %tmp59, %p2.i96
   %tmp139 = fmul float %tmp59, %p2.i96
   %tmp140 = fmul float %tmp59, %p2.i96
   %mbcnt.lo.2 = call i32 @llvm.amdgcn.mbcnt.lo(i32 -1, i32 0)
   %tmp141 = call i32 @llvm.amdgcn.mbcnt.hi(i32 -1, i32 %mbcnt.lo.2)
-  %tmp142 = getelementptr [64 x i32], [64 x i32] addrspace(3)* @ddxy_lds, i32 0, i32 %tmp141
+  %tmp142 = getelementptr [64 x i32], [64 x i32] addrspace(3)* %lds, i32 0, i32 %tmp141
   %tmp143 = bitcast float %tmp137 to i32
   store i32 %tmp143, i32 addrspace(3)* %tmp142
   %tmp144 = bitcast float %tmp138 to i32
   store i32 %tmp144, i32 addrspace(3)* %tmp142
   %tmp145 = bitcast float %tmp139 to i32
   store i32 %tmp145, i32 addrspace(3)* %tmp142
   %tmp146 = bitcast float %tmp140 to i32
   store i32 %tmp146, i32 addrspace(3)* %tmp142
   %mbcnt.lo.3 = call i32 @llvm.amdgcn.mbcnt.lo(i32 -1, i32 0)
   %tmp147 = call i32 @llvm.amdgcn.mbcnt.hi(i32 -1, i32 %mbcnt.lo.3)
-  %tmp148 = getelementptr [64 x i32], [64 x i32] addrspace(3)* @ddxy_lds, i32 0, i32 %tmp147
+  %tmp148 = getelementptr [64 x i32], [64 x i32] addrspace(3)* %lds, i32 0, i32 %tmp147
   %tmp149 = and i32 %tmp147, -4
-  %tmp150 = getelementptr [64 x i32], [64 x i32] addrspace(3)* @ddxy_lds, i32 0, i32 %tmp149
+  %tmp150 = getelementptr [64 x i32], [64 x i32] addrspace(3)* %lds, i32 0, i32 %tmp149
   %tmp151 = add i32 %tmp149, 2
-  %tmp152 = getelementptr [64 x i32], [64 x i32] addrspace(3)* @ddxy_lds, i32 0, i32 %tmp151
+  %tmp152 = getelementptr [64 x i32], [64 x i32] addrspace(3)* %lds, i32 0, i32 %tmp151
   %tmp153 = bitcast float %tmp137 to i32
   store i32 %tmp153, i32 addrspace(3)* %tmp148
   %tmp154 = load i32, i32 addrspace(3)* %tmp150
   %tmp155 = bitcast i32 %tmp154 to float
   %tmp156 = load i32, i32 addrspace(3)* %tmp152
   %tmp157 = bitcast i32 %tmp156 to float
   %tmp158 = fsub float %tmp157, %tmp155
   %tmp159 = bitcast float %tmp138 to i32

test/CodeGen/AMDGPU/target-cpu.ll

define amdgpu_kernel void @target_fiji() #4 {
   %gep = getelementptr inbounds i32, i32 addrspace(1)* %ptr, i64 %id.ext
   store i32 0, i32 addrspace(1)* %gep
   call void @llvm.amdgcn.s.dcache.wb()
   ret void
 }
 
 ; CHECK-LABEL: {{^}}promote_alloca_enabled:
 ; CHECK: ds_read_b32
-; CHECK: ; LDSByteSize: 5120
 define amdgpu_kernel void @promote_alloca_enabled(i32 addrspace(1)* nocapture %out, i32 addrspace(1)* nocapture %in) #5 {
 entry:
   %stack = alloca [5 x i32], align 4, addrspace(5)
   %tmp = load i32, i32 addrspace(1)* %in, align 4
   %arrayidx1 = getelementptr inbounds [5 x i32], [5 x i32] addrspace(5)* %stack, i32 0, i32 %tmp
   %load = load i32, i32 addrspace(5)* %arrayidx1
   store i32 %load, i32 addrspace(1)* %out
   ret void

test/CodeGen/MIR/AMDGPU/machine-function-info.ll

 ; RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -stop-after expand-isel-pseudos -o %t.mir %s
 ; RUN: llc -run-pass=none -verify-machineinstrs %t.mir -o - | FileCheck %s
 
 ; Test that SIMachineFunctionInfo can be round trip serialized through
 ; MIR.
 
 @lds = addrspace(3) global [512 x float] undef, align 4
 
 ; CHECK-LABEL: {{^}}name: kernel
 ; CHECK: machineFunctionInfo:
 ; CHECK-NEXT: explicitKernArgSize: 128
 ; CHECK-NEXT: maxKernArgAlign: 64
-; CHECK-NEXT: ldsSize: 2048
+; CHECK-NEXT: ldsSize: 0
 ; CHECK-NEXT: isEntryFunction: true
 ; CHECK-NEXT: noSignedZerosFPMath: false
 ; CHECK-NEXT: memoryBound: false
 ; CHECK-NEXT: waveLimiter: false
 ; CHECK-NEXT: scratchRSrcReg:  '$sgpr96_sgpr97_sgpr98_sgpr99'
 ; CHECK-NEXT: scratchWaveOffsetReg: '$sgpr101'
 ; CHECK-NEXT: frameOffsetReg:  '$sgpr101'
 ; CHECK-NEXT: stackPtrOffsetReg: '$sgpr101'