Mark all subsequent decls used.
In the source
static void f();
static void f();
template<typename T>
static void g() {
f();
}
static void f() {
}
void h() {
g<int>();
}
the call to f refers to the second decl, but it is only marked used at the end
of the translation unit during instantiation, after the third f decl has been
linked in.
With this patch we mark all subsequent decls used, so that it is easy to check
if a symbol is used or not.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171888 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index 66861ae..8f9e1a9 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -328,11 +328,7 @@
/// \brief Used to prune the decls of Sema's UnusedFileScopedDecls vector.
static bool ShouldRemoveFromUnused(Sema *SemaRef, const DeclaratorDecl *D) {
- // Template instantiation can happen at the end of the translation unit
- // and it sets the canonical (first) decl to used. Normal uses set the last
- // decl at the time to used and subsequent decl inherit the flag. The net
- // result is that we need to check both ends of the decl chain.
- if (D->isUsed() || D->getMostRecentDecl()->isUsed())
+ if (D->getMostRecentDecl()->isUsed())
return true;
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {