From: Eli Friedman <eli.friedman@gmail.com>
Date: Sat, 21 Jan 2012 04:52:58 +0000 (+0000)
Subject: Add an assertion that our use-marking actually covers all uses of a variable.  The... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=416de514f8a7a9c121e45ae450d0faef9e5a0ef9;p=clang

Add an assertion that our use-marking actually covers all uses of a variable.  The assertion doesn't cover quite as much as it should, but it's a good start, at least.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148625 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index 97a2f05466..db87cba9a0 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -1381,6 +1381,13 @@ LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) {
   CharUnits Alignment = getContext().getDeclAlign(ND);
   QualType T = E->getType();
 
+  // FIXME: We should be able to assert this for FunctionDecls as well!
+  // FIXME: We should be able to assert this for all DeclRefExprs, not just
+  // those with a valid source location.
+  assert((ND->isUsed(false) || !isa<VarDecl>(ND) ||
+          !E->getLocation().isValid()) &&
+         "Should not use decl without marking it used!");
+
   if (ND->hasAttr<WeakRefAttr>()) {
     const ValueDecl *VD = cast<ValueDecl>(ND);
     llvm::Constant *Aliasee = CGM.GetWeakRefReference(VD);