commit f63bda5eca37d36f4485aedd53856eba412bba06
author Ted Kremenek <kremenek@apple.com> Thu Sep 06 23:25:10 2007 +0000
committer Ted Kremenek <kremenek@apple.com> Thu Sep 06 23:25:10 2007 +0000
tree db662661309ecaa55c4b6242cb8a2e3f4c28d027
parent e9646a0d0fd5f6e6e5de53a8892582e01085a36b

Minor bug fixes to corner cases where LiveVariables would crash on some CFGs
that contained no declarations, or when a variable is declared but never used.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41756 91177308-0d34-0410-b5e6-96231b3b80d8

Analysis/LiveVariables.cpp

diff --git a/Analysis/LiveVariables.cpp b/Analysis/LiveVariables.cpp
index b5248fe..6b25f9e 100644
--- a/Analysis/LiveVariables.cpp
+++ b/Analysis/LiveVariables.cpp
@@ -40,7 +40,9 @@
     
   void VisitStmt(Stmt* S);
   void VisitDeclRefExpr(DeclRefExpr* DR);
+  void VisitDeclStmt(DeclStmt* DS);
   void Register(Decl* D);
+  void RegisterDeclChain(Decl* D);
   void RegisterUsedDecls();
 };
 
@@ -50,7 +52,15 @@
 }
 
 void RegisterDecls::VisitDeclRefExpr(DeclRefExpr* DR) {
-  for (Decl* D = DR->getDecl() ; D != NULL ; D = D->getNextDeclarator())
+  RegisterDeclChain(DR->getDecl());
+}
+
+void RegisterDecls::VisitDeclStmt(DeclStmt* DS) {
+  RegisterDeclChain(DS->getDecl());
+}
+
+void RegisterDecls::RegisterDeclChain(Decl* D) {
+  for (; D != NULL ; D = D->getNextDeclarator())
     Register(D);
 }
 
@@ -363,7 +373,6 @@
 
 void LiveVariables::runOnBlock(const CFGBlock* B, LiveVariablesAuditor* Auditor)
 {
-  assert (NumDecls && "You must use runOnCFG before using runOnBlock.");
   LivenessTFuncs TF(*this,Auditor);
   TF.ProcessBlock(B);
 }