[clang] Use llvm::unique (NFC) (#140459)

Author: kazutakahirata

clang/include/clang/Serialization/ContinuousRangeMap.h

@@ -119,8 +119,8 @@ class ContinuousRangeMap {
     ~Builder() {
       llvm::sort(Self.Rep, Compare());
       Self.Rep.erase(
-          std::unique(
-              Self.Rep.begin(), Self.Rep.end(),
+          llvm::unique(
+              Self.Rep,
               [](const_reference A, const_reference B) {
                 // FIXME: we should not allow any duplicate keys, but there are
                 // a lot of duplicate 0 -> 0 mappings to remove first.

clang/lib/Format/UsingDeclarationsSorter.cpp

@@ -157,11 +157,10 @@ void endUsingDeclarationBlock(
   };
   llvm::stable_sort(SortedUsingDeclarations, Comp);
   SortedUsingDeclarations.erase(
-      std::unique(SortedUsingDeclarations.begin(),
-                  SortedUsingDeclarations.end(),
-                  [](const UsingDeclaration &a, const UsingDeclaration &b) {
-                    return a.Label == b.Label;
-                  }),
+      llvm::unique(SortedUsingDeclarations,
+                   [](const UsingDeclaration &a, const UsingDeclaration &b) {
+                     return a.Label == b.Label;
+                   }),
       SortedUsingDeclarations.end());
   for (size_t I = 0, E = UsingDeclarations->size(); I < E; ++I) {
     if (I >= SortedUsingDeclarations.size()) {

clang/lib/Sema/SemaLambda.cpp

@@ -1633,8 +1633,8 @@ static void repeatForLambdaConversionFunctionCallingConvs(
         CC_C,        CC_X86StdCall, CC_X86FastCall, CC_X86VectorCall,
         DefaultFree, DefaultMember, CallOpCC};
     llvm::sort(Convs);
-    llvm::iterator_range<CallingConv *> Range(
-        std::begin(Convs), std::unique(std::begin(Convs), std::end(Convs)));
+    llvm::iterator_range<CallingConv *> Range(std::begin(Convs),
+                                              llvm::unique(Convs));
     const TargetInfo &TI = S.getASTContext().getTargetInfo();
 
     for (CallingConv C : Range) {

clang/tools/libclang/CIndex.cpp

@@ -8872,9 +8872,8 @@ static void getCursorPlatformAvailabilityForDecl(
         return LHS->getPlatform()->getName() < RHS->getPlatform()->getName();
       });
   ASTContext &Ctx = D->getASTContext();
-  auto It = std::unique(
-      AvailabilityAttrs.begin(), AvailabilityAttrs.end(),
-      [&Ctx](AvailabilityAttr *LHS, AvailabilityAttr *RHS) {
+  auto It = llvm::unique(
+      AvailabilityAttrs, [&Ctx](AvailabilityAttr *LHS, AvailabilityAttr *RHS) {
         if (LHS->getPlatform() != RHS->getPlatform())
           return false;