Keep track of function template specializations, to eliminate

redundant, implicit instantiations of function templates and provide a
place where we can hang function template specializations.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74454 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index 86b5817743..7683d5a160 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -1806,6 +1806,12 @@ Decl *ASTContext::getCanonicalDecl(Decl *D) {
     return const_cast<FunctionDecl *>(Function);
   }
 
+  if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D)) {
+    while (FunTmpl->getPreviousDeclaration())
+      FunTmpl = FunTmpl->getPreviousDeclaration();
+    return FunTmpl;
+  }
+  
   if (const VarDecl *Var = dyn_cast<VarDecl>(D)) {
     while (Var->getPreviousDeclaration())
       Var = Var->getPreviousDeclaration();