Allow getting all source locations of selector identifiers in a ObjCMethodDecl.

Instead of always storing all source locations for the selector identifiers
we check whether all the identifiers are in a "standard" position; "standard" position is

  -Immediately before the arguments: -(id)first:(int)x second:(int)y;
  -With a space between the arguments: -(id)first: (int)x second: (int)y;
  -For nullary selectors, immediately before ';': -(void)release;

In such cases we infer the locations instead of storing them.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140989 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTImporter.cpp b/lib/AST/ASTImporter.cpp
index 7c866cd..476e83a 100644
--- a/lib/AST/ASTImporter.cpp
+++ b/lib/AST/ASTImporter.cpp
@@ -2923,7 +2923,6 @@
     = ObjCMethodDecl::Create(Importer.getToContext(),
                              Loc,
                              Importer.Import(D->getLocEnd()),
-                             /*FIXME:*/ ArrayRef<SourceLocation>(),
                              Name.getObjCSelector(),
                              ResultTy, ResultTInfo, DC,
                              D->isInstanceMethod(),
@@ -2955,8 +2954,9 @@
     ToParams[I]->setOwningFunction(ToMethod);
     ToMethod->addDecl(ToParams[I]);
   }
-  ToMethod->setMethodParams(Importer.getToContext(), 
-                            ToParams.data(), ToParams.size());
+  SmallVector<SourceLocation, 12> SelLocs;
+  D->getSelectorLocs(SelLocs);
+  ToMethod->setMethodParams(Importer.getToContext(), ToParams, SelLocs); 
 
   ToMethod->setLexicalDeclContext(LexicalDC);
   Importer.Imported(D, ToMethod);