Remove AnalysisContext::getLiveVariables(), and introduce a templatized mechanism to lazily create analyses that are attached to AnalysisContext objects.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141425 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LiveVariables.cpp b/lib/Analysis/LiveVariables.cpp
index c800c70..62c5455 100644
--- a/lib/Analysis/LiveVariables.cpp
+++ b/lib/Analysis/LiveVariables.cpp
@@ -670,3 +670,5 @@
   llvm::errs() << "\n";  
 }
 
+const void *LiveVariables::getTag() { static int x; return &x; }
+const void *RelaxedLiveVariables::getTag() { static int x; return &x; }