Fix for merging decls in pragma weak

Calling CheckFunctionDeclaration so that 2 decls for the 'weak' are merged.
Differential Revision: http://reviews.llvm.org/D13048

llvm-svn: 254143

1 files changed, 13 insertions, 8 deletions

diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index c00914663aa..13a11bcac9e 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -5435,17 +5435,22 @@ NamedDecl * Sema::DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II,
   assert(isa<FunctionDecl>(ND) || isa<VarDecl>(ND));
   NamedDecl *NewD = nullptr;
   if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
-    FunctionDecl *NewFD;
-    // FIXME: Missing call to CheckFunctionDeclaration().
     // FIXME: Mangling?
     // FIXME: Is the qualifier info correct?
     // FIXME: Is the DeclContext correct?
-    NewFD = FunctionDecl::Create(FD->getASTContext(), FD->getDeclContext(),
-                                 Loc, Loc, DeclarationName(II),
-                                 FD->getType(), FD->getTypeSourceInfo(),
-                                 SC_None, false/*isInlineSpecified*/,
-                                 FD->hasPrototype(),
-                                 false/*isConstexprSpecified*/);
+
+    LookupResult Previous(*this, II, Loc, LookupOrdinaryName);
+    LookupParsedName(Previous, TUScope, nullptr, true);
+
+    auto NewFD = FunctionDecl::Create(
+        FD->getASTContext(), FD->getDeclContext(), Loc, Loc,
+        DeclarationName(II), FD->getType(), FD->getTypeSourceInfo(), SC_None,
+        false /*isInlineSpecified*/, FD->hasPrototype(),
+        false /*isConstexprSpecified*/);
+
+    CheckFunctionDeclaration(TUScope, NewFD, Previous,
+                             false /*IsExplicitSpecialization*/);
+
     NewD = NewFD;
 
     if (FD->getQualifier())