Note when a decl is used in AST files.

When an AST file is built based on another AST file, it can use a decl from
the fist file, and therefore mark the "isUsed" bit.  We need to note this in
the AST file so that the bit is set correctly when the second AST file is
loaded.

This patch introduces the distinction between setIsUsed() and markUsed() so
that we don't call into the ASTMutationListener callback when it wouldn't
be appropriate.

Fixes PR16635.

llvm-svn: 190016

1 files changed, 2 insertions, 2 deletions

diff --git a/clang/lib/Sema/SemaStmt.cpp b/clang/lib/Sema/SemaStmt.cpp
index 861c1c8bd03..ef2202f3374 100644
--- a/clang/lib/Sema/SemaStmt.cpp
+++ b/clang/lib/Sema/SemaStmt.cpp
@@ -2041,7 +2041,7 @@ Sema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc,
 
   if (RangeVarType->isDependentType()) {
     // The range is implicitly used as a placeholder when it is dependent.
-    RangeVar->setUsed();
+    RangeVar->markUsed(Context);
 
     // Deduce any 'auto's in the loop variable as 'DependentTy'. We'll fill
     // them in properly when we instantiate the loop.
@@ -2284,7 +2284,7 @@ StmtResult Sema::ActOnGotoStmt(SourceLocation GotoLoc,
                                SourceLocation LabelLoc,
                                LabelDecl *TheDecl) {
   getCurFunction()->setHasBranchIntoScope();
-  TheDecl->setUsed();
+  TheDecl->markUsed(Context);
   return Owned(new (Context) GotoStmt(TheDecl, GotoLoc, LabelLoc));
 }