Added initial boilerplate in GRExprEngine to allow checker-specific transfer
function logic to act when symbols become dead.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@50221 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ValueState.cpp b/lib/Analysis/ValueState.cpp
index 8027ce9..ed6a860 100644
--- a/lib/Analysis/ValueState.cpp
+++ b/lib/Analysis/ValueState.cpp
@@ -32,7 +32,8 @@
ValueState*
ValueStateManager::RemoveDeadBindings(ValueState* St, Stmt* Loc,
- const LiveVariables& Liveness) {
+ const LiveVariables& Liveness,
+ DeadSymbolsTy& DeadSymbols) {
// This code essentially performs a "mark-and-sweep" of the VariableBindings.
// The roots are any Block-level exprs and Decls that our liveness algorithm
@@ -133,13 +134,28 @@
NewSt.VarBindings = Remove(NewSt, I.getKey());
// Remove dead symbols.
- for (ValueState::ce_iterator I = St->ce_begin(), E=St->ce_end(); I!=E; ++I)
- if (!MarkedSymbols.count(I.getKey()))
- NewSt.ConstEq = CEFactory.Remove(NewSt.ConstEq, I.getKey());
- for (ValueState::cne_iterator I = St->cne_begin(), E=St->cne_end(); I!=E; ++I)
- if (!MarkedSymbols.count(I.getKey()))
- NewSt.ConstNotEq = CNEFactory.Remove(NewSt.ConstNotEq, I.getKey());
+ DeadSymbols.clear();
+
+ for (ValueState::ce_iterator I = St->ce_begin(), E=St->ce_end(); I!=E; ++I) {
+
+ SymbolID sym = I.getKey();
+
+ if (!MarkedSymbols.count(sym)) {
+ DeadSymbols.insert(sym);
+ NewSt.ConstEq = CEFactory.Remove(NewSt.ConstEq, sym);
+ }
+ }
+
+ for (ValueState::cne_iterator I = St->cne_begin(), E=St->cne_end(); I!=E;++I){
+
+ SymbolID sym = I.getKey();
+
+ if (!MarkedSymbols.count(sym)) {
+ DeadSymbols.insert(sym);
+ NewSt.ConstNotEq = CNEFactory.Remove(NewSt.ConstNotEq, sym);
+ }
+ }
return getPersistentState(NewSt);
}