[llvm] Use DenseMap::contains (NFC)

Author: kazutakahirata

llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h

@@ -447,7 +447,7 @@ struct MCDCRecord {
   bool isConditionIndependencePairCovered(unsigned Condition) const {
     auto It = PosToID.find(Condition);
     if (It != PosToID.end())
-      return (IndependencePairs.find(It->second) != IndependencePairs.end());
+      return IndependencePairs.contains(It->second);
     llvm_unreachable("Condition ID without an Ordinal mapping");
   }
 

llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.cpp

@@ -645,7 +645,7 @@ SPIRVType *SPIRVGlobalRegistry::findSPIRVType(
   Register Reg = DT.find(Ty, &MIRBuilder.getMF());
   if (Reg.isValid())
     return getSPIRVTypeForVReg(Reg);
-  if (ForwardPointerTypes.find(Ty) != ForwardPointerTypes.end())
+  if (ForwardPointerTypes.contains(Ty))
     return ForwardPointerTypes[Ty];
   return restOfCreateSPIRVType(Ty, MIRBuilder, AccQual, EmitIR);
 }
@@ -712,14 +712,14 @@ SPIRVType *SPIRVGlobalRegistry::createSPIRVType(
     // Null pointer means we have a loop in type definitions, make and
     // return corresponding OpTypeForwardPointer.
     if (SpvElementType == nullptr) {
-      if (ForwardPointerTypes.find(Ty) == ForwardPointerTypes.end())
+      if (!ForwardPointerTypes.contains(Ty))
         ForwardPointerTypes[PType] = getOpTypeForwardPointer(SC, MIRBuilder);
       return ForwardPointerTypes[PType];
     }
     Register Reg(0);
     // If we have forward pointer associated with this type, use its register
     // operand to create OpTypePointer.
-    if (ForwardPointerTypes.find(PType) != ForwardPointerTypes.end())
+    if (ForwardPointerTypes.contains(PType))
       Reg = getSPIRVTypeID(ForwardPointerTypes[PType]);
 
     return getOpTypePointer(SC, SpvElementType, MIRBuilder, Reg);

llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp

@@ -391,7 +391,7 @@ void SPIRVModuleAnalysis::numberRegistersGlobally(const Module &M) {
         if (MI.getOpcode() != SPIRV::OpExtInst)
           continue;
         auto Set = MI.getOperand(2).getImm();
-        if (MAI.ExtInstSetMap.find(Set) == MAI.ExtInstSetMap.end())
+        if (!MAI.ExtInstSetMap.contains(Set))
           MAI.ExtInstSetMap[Set] = Register::index2VirtReg(MAI.getNextID());
       }
     }

llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h

@@ -189,7 +189,7 @@ struct ModuleAnalysisInfo {
   }
   unsigned getNextID() { return MaxID++; }
   bool hasMBBRegister(const MachineBasicBlock &MBB) {
-    return BBNumToRegMap.find(MBB.getNumber()) != BBNumToRegMap.end();
+    return BBNumToRegMap.contains(MBB.getNumber());
   }
   // Convert MBB's number to corresponding ID register.
   Register getOrCreateMBBRegister(const MachineBasicBlock &MBB) {

llvm/lib/Target/SPIRV/SPIRVPreLegalizer.cpp

@@ -83,7 +83,7 @@ static void addConstantsToTrack(MachineFunction &MF, SPIRVGlobalRegistry *GR) {
   }
   for (MachineInstr *MI : ToErase) {
     Register Reg = MI->getOperand(2).getReg();
-    if (RegsAlreadyAddedToDT.find(MI) != RegsAlreadyAddedToDT.end())
+    if (RegsAlreadyAddedToDT.contains(MI))
       Reg = RegsAlreadyAddedToDT[MI];
     auto *RC = MRI.getRegClassOrNull(MI->getOperand(0).getReg());
     if (!MRI.getRegClassOrNull(Reg) && RC)