[OPENMP50]Register vendor name only once in vendor context selector.

No need to store multiple copies of the same vendor names in the context
selector, keep only single copy.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@374363 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Parse/ParseOpenMP.cpp

@@ -17,6 +17,7 @@
 #include "clang/Parse/RAIIObjectsForParser.h"
 #include "clang/Sema/Scope.h"
 #include "llvm/ADT/PointerIntPair.h"
+#include "llvm/ADT/UniqueVector.h"
 
 using namespace clang;
 
@@ -853,7 +854,7 @@ static void parseImplementationSelector(
     (void)T.expectAndConsume(diag::err_expected_lparen_after,
                              CtxSelectorName.data());
     const ExprResult Score = parseContextScore(P);
-    SmallVector<llvm::SmallString<16>, 4> Vendors;
+    llvm::UniqueVector<llvm::SmallString<16>> Vendors;
     do {
       // Parse <vendor>.
       StringRef VendorName;
@@ -862,7 +863,7 @@ static void parseImplementationSelector(
         VendorName = P.getPreprocessor().getSpelling(P.getCurToken(), Buffer);
         (void)P.ConsumeToken();
         if (!VendorName.empty())
-          Vendors.push_back(VendorName);
+          Vendors.insert(VendorName);
       } else {
         P.Diag(Tok.getLocation(), diag::err_omp_declare_variant_item_expected)
             << "vendor identifier"
@@ -878,10 +879,10 @@ static void parseImplementationSelector(
     (void)T.consumeClose();
     if (!Vendors.empty()) {
       SmallVector<StringRef, 4> ImplVendors(Vendors.size());
-      for (int I = 0, E = Vendors.size(); I < E; ++I)
-        ImplVendors[I] = Vendors[I];
+      llvm::copy(Vendors, ImplVendors.begin());
       Sema::OpenMPDeclareVariantCtsSelectorData Data(
-          OMPDeclareVariantAttr::CtxSetImplementation, CSKind, ImplVendors,
+          OMPDeclareVariantAttr::CtxSetImplementation, CSKind,
+          llvm::makeMutableArrayRef(ImplVendors.begin(), ImplVendors.size()),
           Score);
       Callback(SourceRange(Loc, Tok.getLocation()), Data);
     }

test/OpenMP/declare_variant_ast_print.c

@@ -11,7 +11,7 @@ int foo(void);
 #pragma omp declare variant(foo) match(implementation={vendor(llvm)})
 #pragma omp declare variant(foo) match(implementation={vendor(llvm), xxx})
 #pragma omp declare variant(foo) match(implementation={vendor(unknown)})
-#pragma omp declare variant(foo) match(implementation={vendor(score(5): ibm, xxx)})
+#pragma omp declare variant(foo) match(implementation={vendor(score(5): ibm, xxx, ibm)})
 int bar(void);
 
 // CHECK:      int foo();

test/OpenMP/declare_variant_ast_print.cpp

@@ -40,7 +40,7 @@ int bar();
 #pragma omp declare variant(foofoo <T>) match(user = {condition(<expr>)})
 #pragma omp declare variant(foofoo <T>) match(implementation={vendor(llvm)})
 #pragma omp declare variant(foofoo <T>) match(implementation={vendor(unknown)})
-#pragma omp declare variant(foofoo <T>) match(implementation={vendor(score(C+5): ibm, xxx)})
+#pragma omp declare variant(foofoo <T>) match(implementation={vendor(score(C+5): ibm, xxx, ibm)})
 template <typename T, int C>
 T barbar();