[OPENMP50]Add parsing/sema analysis for declare variant score.

Context selectors may include optional score clause in format
`score(<expr>):`, where `<expr>` must be a constant integer expression.
Added parsing/sema analysis only.

llvm-svn: 373502

2 files changed, 23 insertions, 3 deletions

diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 42e1755b586..2b659f7f11f 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -5112,8 +5112,23 @@ void Sema::ActOnOpenMPDeclareVariantDirective(
   if (Data.CtxSet == OMPDeclareVariantAttr::CtxSetUnknown ||
       Data.Ctx == OMPDeclareVariantAttr::CtxUnknown)
     return;
+  Expr *Score = nullptr;
+  OMPDeclareVariantAttr::ScoreType ST = OMPDeclareVariantAttr::ScoreUnknown;
+  if (Data.CtxScore.isUsable()) {
+    ST = OMPDeclareVariantAttr::ScoreSpecified;
+    Score = Data.CtxScore.get();
+    if (!Score->isTypeDependent() && !Score->isValueDependent() &&
+        !Score->isInstantiationDependent() &&
+        !Score->containsUnexpandedParameterPack()) {
+      llvm::APSInt Result;
+      ExprResult ICE = VerifyIntegerConstantExpression(Score, &Result);
+      if (ICE.isInvalid())
+        return;
+    }
+  }
   auto *NewAttr = OMPDeclareVariantAttr::CreateImplicit(
-      Context, VariantRef, Data.CtxSet, Data.Ctx, Data.ImplVendor, SR);
+      Context, VariantRef, Score, Data.CtxSet, ST, Data.Ctx, Data.ImplVendor,
+      SR);
   FD->addAttr(NewAttr);
 }
 
diff --git a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
index f6cf3696e1f..881b4fd992e 100644
--- a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -388,6 +388,10 @@ static void instantiateOMPDeclareVariantAttr(
   if (Expr *E = Attr.getVariantFuncRef())
     VariantFuncRef = Subst(E);
 
+  ExprResult Score;
+  if (Expr *E = Attr.getScore())
+    Score = Subst(E);
+
   // Check function/variant ref.
   Optional<std::pair<FunctionDecl *, Expr *>> DeclVarData =
       S.checkOpenMPDeclareVariantFunction(
@@ -395,8 +399,9 @@ static void instantiateOMPDeclareVariantAttr(
   if (!DeclVarData)
     return;
   // Instantiate the attribute.
-  Sema::OpenMPDeclareVariantCtsSelectorData Data(
-      Attr.getCtxSelectorSet(), Attr.getCtxSelector(), Attr.getImplVendor());
+  Sema::OpenMPDeclareVariantCtsSelectorData Data(Attr.getCtxSelectorSet(),
+                                                 Attr.getCtxSelector(),
+                                                 Attr.getImplVendor(), Score);
   S.ActOnOpenMPDeclareVariantDirective(DeclVarData.getValue().first,
                                        DeclVarData.getValue().second,
                                        Attr.getRange(), Data);