remove dead code

Author: VyacheslavLevytskyy

llvm/lib/Target/SPIRV/CMakeLists.txt

@@ -20,7 +20,6 @@ add_llvm_target(SPIRVCodeGen
   SPIRVCallLowering.cpp
   SPIRVInlineAsmLowering.cpp
   SPIRVCommandLine.cpp
-  SPIRVDuplicatesTracker.cpp
   SPIRVEmitIntrinsics.cpp
   SPIRVGlobalRegistry.cpp
   SPIRVInstrInfo.cpp

llvm/lib/Target/SPIRV/SPIRVDuplicatesTracker.cpp

@@ -211,23 +211,7 @@ class SPIRVGeneralDuplicatesTracker {
   SPIRVDuplicatesTracker<MachineInstr> MT;
   SPIRVDuplicatesTracker<SPIRV::SpecialTypeDescriptor> ST;
 
-  // NOTE: using MOs instead of regs to get rid of MF dependency to be able
-  // to use flat data structure.
-  // NOTE: replacing DenseMap with MapVector doesn't affect overall correctness
-  // but makes LITs more stable, should prefer DenseMap still due to
-  // significant perf difference.
-  using SPIRVReg2EntryTy =
-      MapVector<MachineOperand *, SPIRV::DTSortableEntry *>;
-
-  template <typename T>
-  void prebuildReg2Entry(SPIRVDuplicatesTracker<T> &DT,
-                         SPIRVReg2EntryTy &Reg2Entry,
-                         const SPIRVInstrInfo *TII);
-
 public:
-  void buildDepsGraph(std::vector<SPIRV::DTSortableEntry *> &Graph,
-                      const SPIRVInstrInfo *TII, MachineModuleInfo *MMI);
-
   void add(const Type *Ty, const MachineFunction *MF, Register R) {
     TT.add(unifyPtrType(Ty), MF, R);
   }

llvm/lib/Target/SPIRV/SPIRVDuplicatesTracker.h

@@ -90,8 +90,7 @@ class SPIRVGlobalRegistry {
   DenseMap<Value *, CallInst *> AssignPtrTypeInstr;
 
   // Maps OpVariable and OpFunction-related v-regs to its LLVM IR definition.
-  DenseMap<std::pair<const MachineFunction *, Register>, const Value *>
-      Reg2GO;
+  DenseMap<std::pair<const MachineFunction *, Register>, const Value *> Reg2GO;
 
   // Add a new OpTypeXXX instruction without checking for duplicates.
   SPIRVType *createSPIRVType(const Type *Type, MachineIRBuilder &MIRBuilder,
@@ -155,12 +154,6 @@ class SPIRVGlobalRegistry {
     return DT.find(F, MF);
   }
 
-  void buildDepsGraph(std::vector<SPIRV::DTSortableEntry *> &Graph,
-                      const SPIRVInstrInfo *TII,
-                      MachineModuleInfo *MMI = nullptr) {
-    DT.buildDepsGraph(Graph, TII, MMI);
-  }
-
   void setBound(unsigned V) { Bound = V; }
   unsigned getBound() { return Bound; }