AMDGPU: Check feature attributes in SIMachineFunctionInfo

[• tstellarAMD]

I think I approved this earlier and it was already committed.

[arsenm]

This was r254091

lib/Target/AMDGPU/SIISelLowering.cpp

SDValue SITargetLowering::LowerLocalSizeIntrinsic(SelectionDAG &DAG,
   MachineFunction &MF = DAG.getMachineFunction();
   const SIRegisterInfo *TRI =
       static_cast<const SIRegisterInfo *>(Subtarget->getRegisterInfo());
 
   unsigned Offset;
   unsigned BasePtr;
   EVT MemVT;
   if (Subtarget->isAmdHsaOS()) {
+    const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
+    (void) MFI;
+    assert(MFI->hasDispatchPtr());
+
     BasePtr = TRI->getPreloadedValue(MF, SIRegisterInfo::DISPATCH_PTR);
 
     // Local size value are 16-bits, but we always load 32-bit values and
     // then mask or shift to get the correct value.  This allows use to
     // load the data with SMRD instructions which is faster than using
     // MUBUF instructions.
     Offset = SI::DispatchPacketOffset::LOCAL_SIZE_X + (4 * (Dim >> 1));
     SDValue Param = LowerParameter(DAG, MVT::i32, MVT::i32, DL, DAG.getEntryNode(),

lib/Target/AMDGPU/SIMachineFunctionInfo.h

 
 /// This class keeps track of the SPI_SP_INPUT_ADDR config register, which
 /// tells the hardware which interpolation parameters to load.
 class SIMachineFunctionInfo : public AMDGPUMachineFunction {
   void anchor() override;
 
   unsigned TIDReg;
   unsigned ScratchRSrcReg;
-  bool HasSpilledVGPRs;
 
 public:
+  // FIXME: Make private
+  unsigned LDSWaveSpillSize;
+  unsigned PSInputAddr;
+  std::map<unsigned, unsigned> LaneVGPRs;
+  unsigned ScratchOffsetReg;
+  unsigned NumUserSGPRs;
 
+private:
+  bool HasSpilledVGPRs;
+
+  // Feature bits required for inputs passed in user / system SGPRs.
+  bool DispatchPtr : 1;
+  bool QueuePtr : 1;
+  bool DispatchID : 1;
+  bool KernargSegmentPtr : 1;
+  bool FlatScratchInit : 1;
+  bool GridWorkgroupCountX : 1;
+  bool GridWorkgroupCountY : 1;
+  bool GridWorkgroupCountZ : 1;
+
+  bool WorkGroupIDX : 1; // Always initialized.
+  bool WorkGroupIDY : 1;
+  bool WorkGroupIDZ : 1;
+  bool WorkGroupInfo : 1;
+
+  bool WorkItemIDX : 1; // Always initialized.
+  bool WorkItemIDY : 1;
+  bool WorkItemIDZ : 1;
+
+public:
   struct SpilledReg {
     unsigned VGPR;
     int Lane;
     SpilledReg(unsigned R, int L) : VGPR (R), Lane (L) { }
     SpilledReg() : VGPR(0), Lane(-1) { }
     bool hasLane() { return Lane != -1;}
   };
 
   // SIMachineFunctionInfo definition
 
   SIMachineFunctionInfo(const MachineFunction &MF);
   SpilledReg getSpilledReg(MachineFunction *MF, unsigned FrameIndex,
                            unsigned SubIdx);
-  unsigned PSInputAddr;
-  unsigned NumUserSGPRs;
-  std::map<unsigned, unsigned> LaneVGPRs;
-  unsigned LDSWaveSpillSize;
-  unsigned ScratchOffsetReg;
   bool hasCalculatedTID() const { return TIDReg != AMDGPU::NoRegister; };
   unsigned getTIDReg() const { return TIDReg; };
   void setTIDReg(unsigned Reg) { TIDReg = Reg; }
 
+
+  bool hasDispatchPtr() const {
+    return DispatchPtr;
+  }
+
+  bool hasQueuePtr() const {
+    return QueuePtr;
+  }
+
+  bool hasDispatchID() const {
+    return DispatchID;
+  }
+
+  bool hasKernargSegmentPtr() const {
+    return KernargSegmentPtr;
+  }
+
+  bool hasFlatScratchInit() const {
+    return FlatScratchInit;
+  }
+
+  bool hasGridWorkgroupCountX() const {
+    return GridWorkgroupCountX;
+  }
+
+  bool hasGridWorkgroupCountY() const {
+    return GridWorkgroupCountY;
+  }
+
+  bool hasGridWorkgroupCountZ() const {
+    return GridWorkgroupCountZ;
+  }
+
+  bool hasWorkGroupIDX() const {
+    return WorkGroupIDX;
+  }
+
+  bool hasWorkGroupIDY() const {
+    return WorkGroupIDY;
+  }
+
+  bool hasWorkGroupIDZ() const {
+    return WorkGroupIDZ;
+  }
+
+  bool hasWorkGroupInfo() const {
+    return WorkGroupInfo;
+  }
+
+  bool hasWorkItemIDX() const {
+    return WorkItemIDX;
+  }
+
+  bool hasWorkItemIDY() const {
+    return WorkItemIDY;
+  }
+
+  bool hasWorkItemIDZ() const {
+    return WorkItemIDZ;
+  }
+
   /// \brief Returns the physical register reserved for use as the resource
   /// descriptor for scratch accesses.
   unsigned getScratchRSrcReg() const {
     return ScratchRSrcReg;
   }
 
   void setScratchRSrcReg(const SIRegisterInfo *TRI);
 

lib/Target/AMDGPU/SIMachineFunctionInfo.cpp

 
 // Pin the vtable to this file.
 void SIMachineFunctionInfo::anchor() {}
 
 SIMachineFunctionInfo::SIMachineFunctionInfo(const MachineFunction &MF)
   : AMDGPUMachineFunction(MF),
     TIDReg(AMDGPU::NoRegister),
     ScratchRSrcReg(AMDGPU::NoRegister),
-    HasSpilledVGPRs(false),
+    LDSWaveSpillSize(0),
     PSInputAddr(0),
     NumUserSGPRs(0),
-    LDSWaveSpillSize(0) { }
+    HasSpilledVGPRs(false),
+    DispatchPtr(false),
+    QueuePtr(false),
+    DispatchID(false),
+    KernargSegmentPtr(true),
+    FlatScratchInit(false),
+    GridWorkgroupCountX(false),
+    GridWorkgroupCountY(false),
+    GridWorkgroupCountZ(false),
+    WorkGroupIDX(true),
+    WorkGroupIDY(false),
+    WorkGroupIDZ(false),
+    WorkGroupInfo(false),
+    WorkItemIDX(true),
+    WorkItemIDY(false),
+    WorkItemIDZ(false) {
+  const Function *F = MF.getFunction();
+
+  if (F->hasFnAttribute("amdgpu-dispatch-ptr"))
+    DispatchPtr = true;
+
+  if (F->hasFnAttribute("amdgpu-work-group-id-y"))
+    WorkGroupIDY = true;
+
+  if (F->hasFnAttribute("amdgpu-work-group-id-z"))
+    WorkGroupIDZ = true;
+
+  if (F->hasFnAttribute("amdgpu-work-item-id-y"))
+    WorkItemIDY = true;
+
+  if (F->hasFnAttribute("amdgpu-work-item-id-z"))
+    WorkItemIDZ = true;
+}
 
 void SIMachineFunctionInfo::setScratchRSrcReg(const SIRegisterInfo *TRI) {
   // We need to round up to next multiple of 4.
   unsigned NextSReg128 = RoundUpToAlignment(NumUserSGPRs + 5, 4);
   unsigned RegSub0 = AMDGPU::SReg_32RegClass.getRegister(NextSReg128);
   ScratchRSrcReg = TRI->getMatchingSuperReg(RegSub0, AMDGPU::sub0,
                                             &AMDGPU::SReg_128RegClass);
 }