AMDGPU: Move R600 specific code out of AMDGPUISelLowering.cpp

[arsenm]

LGTM

lib/Target/AMDGPU/AMDGPUISelLowering.cpp

if (MFI->LocalMemoryObjects.count(GV) == 0) {
       MFI->LDSSize += DL.getTypeAllocSize(GV->getValueType());
     } else {
       Offset = MFI->LocalMemoryObjects[GV];
     }
 
     return DAG.getConstant(Offset, SDLoc(Op),
                            getPointerTy(DL, AMDGPUAS::LOCAL_ADDRESS));
   }
-  case AMDGPUAS::CONSTANT_ADDRESS: {
-    MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
-    Type *EltType = GV->getValueType();
-    unsigned Size = DL.getTypeAllocSize(EltType);
-    unsigned Alignment = DL.getPrefTypeAlignment(EltType);
-
-    MVT PrivPtrVT = getPointerTy(DL, AMDGPUAS::PRIVATE_ADDRESS);
-    MVT ConstPtrVT = getPointerTy(DL, AMDGPUAS::CONSTANT_ADDRESS);
-
-    int FI = FrameInfo->CreateStackObject(Size, Alignment, false);
-    SDValue InitPtr = DAG.getFrameIndex(FI, PrivPtrVT);
-
-    const GlobalVariable *Var = cast<GlobalVariable>(GV);
-    if (!Var->hasInitializer()) {
-      // This has no use, but bugpoint will hit it.
-      return DAG.getZExtOrTrunc(InitPtr, SDLoc(Op), ConstPtrVT);
-    }
-
-    const Constant *Init = Var->getInitializer();
-    SmallVector<SDNode*, 8> WorkList;
-
-    for (SDNode::use_iterator I = DAG.getEntryNode()->use_begin(),
-                              E = DAG.getEntryNode()->use_end(); I != E; ++I) {
-      if (I->getOpcode() != AMDGPUISD::REGISTER_LOAD && I->getOpcode() != ISD::LOAD)
-        continue;
-      WorkList.push_back(*I);
-    }
-    SDValue Chain = LowerConstantInitializer(Init, GV, InitPtr, DAG.getEntryNode(), DAG);
-    for (SmallVector<SDNode*, 8>::iterator I = WorkList.begin(),
-                                           E = WorkList.end(); I != E; ++I) {
-      SmallVector<SDValue, 8> Ops;
-      Ops.push_back(Chain);
-      for (unsigned i = 1; i < (*I)->getNumOperands(); ++i) {
-        Ops.push_back((*I)->getOperand(i));
-      }
-      DAG.UpdateNodeOperands(*I, Ops);
-    }
-    return DAG.getZExtOrTrunc(InitPtr, SDLoc(Op), ConstPtrVT);
-  }
   }
 
   const Function &Fn = *DAG.getMachineFunction().getFunction();
   DiagnosticInfoUnsupported BadInit(
       Fn, "unsupported initializer for address space", SDLoc(Op).getDebugLoc());
   DAG.getContext()->diagnose(BadInit);
   return SDValue();
 }

lib/Target/AMDGPU/R600ISelLowering.h

void lowerImplicitParameter(MachineInstr *MI, MachineBasicBlock &BB,
       MachineRegisterInfo & MRI, unsigned dword_offset) const;
   SDValue OptimizeSwizzle(SDValue BuildVector, SDValue Swz[], SelectionDAG &DAG,
                           SDLoc DL) const;
   SDValue vectorToVerticalVector(SelectionDAG &DAG, SDValue Vector) const;
 
   SDValue lowerFrameIndex(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const;
+  SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op,
+                             SelectionDAG &DAG) const;
   SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
 
   SDValue lowerPrivateTruncStore(StoreSDNode *Store, SelectionDAG &DAG) const;
   SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerFPTOUINT(SDValue Op, SelectionDAG &DAG) const;
 
   SDValue lowerPrivateExtLoad(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;

lib/Target/AMDGPU/R600ISelLowering.cpp

if (isa<ConstantSDNode>(Index) ||
     return Op;
 
   Vector = vectorToVerticalVector(DAG, Vector);
   SDValue Insert = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, Op.getValueType(),
                                Vector, Value, Index);
   return vectorToVerticalVector(DAG, Insert);
 }
 
+SDValue R600TargetLowering::LowerGlobalAddress(AMDGPUMachineFunction *MFI,
+                                               SDValue Op,
+                                               SelectionDAG &DAG) const {
+
+  GlobalAddressSDNode *GSD = cast<GlobalAddressSDNode>(Op);
+  if (GSD->getAddressSpace() != AMDGPUAS::CONSTANT_ADDRESS)
+    return AMDGPUTargetLowering::LowerGlobalAddress(MFI, Op, DAG);
+
+  const DataLayout &DL = DAG.getDataLayout();
+  const GlobalValue *GV = GSD->getGlobal();
+  MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
+  Type *EltType = GV->getValueType();
+  unsigned Size = DL.getTypeAllocSize(EltType);
+  unsigned Alignment = DL.getPrefTypeAlignment(EltType);
+
+  MVT PrivPtrVT = getPointerTy(DL, AMDGPUAS::PRIVATE_ADDRESS);
+  MVT ConstPtrVT = getPointerTy(DL, AMDGPUAS::CONSTANT_ADDRESS);
+
+  int FI = FrameInfo->CreateStackObject(Size, Alignment, false);
+  SDValue InitPtr = DAG.getFrameIndex(FI, PrivPtrVT);
+
+  const GlobalVariable *Var = cast<GlobalVariable>(GV);
+  if (!Var->hasInitializer()) {
+    // This has no use, but bugpoint will hit it.
+    return DAG.getZExtOrTrunc(InitPtr, SDLoc(Op), ConstPtrVT);
+  }
+
+  const Constant *Init = Var->getInitializer();
+  SmallVector<SDNode*, 8> WorkList;
+
+  for (SDNode::use_iterator I = DAG.getEntryNode()->use_begin(),
+                            E = DAG.getEntryNode()->use_end(); I != E; ++I) {
+    if (I->getOpcode() != AMDGPUISD::REGISTER_LOAD && I->getOpcode() != ISD::LOAD)
+      continue;
+    WorkList.push_back(*I);
+  }
+  SDValue Chain = LowerConstantInitializer(Init, GV, InitPtr, DAG.getEntryNode(), DAG);
+  for (SmallVector<SDNode*, 8>::iterator I = WorkList.begin(),
+                                         E = WorkList.end(); I != E; ++I) {
+    SmallVector<SDValue, 8> Ops;
+    Ops.push_back(Chain);
+    for (unsigned i = 1; i < (*I)->getNumOperands(); ++i) {
+      Ops.push_back((*I)->getOperand(i));
+    }
+    DAG.UpdateNodeOperands(*I, Ops);
+  }
+  return DAG.getZExtOrTrunc(InitPtr, SDLoc(Op), ConstPtrVT);
+}
+
 SDValue R600TargetLowering::LowerTrig(SDValue Op, SelectionDAG &DAG) const {
   // On hw >= R700, COS/SIN input must be between -1. and 1.
   // Thus we lower them to TRIG ( FRACT ( x / 2Pi + 0.5) - 0.5)
   EVT VT = Op.getValueType();
   SDValue Arg = Op.getOperand(0);
   SDLoc DL(Op);
 
   // TODO: Should this propagate fast-math-flags?