Turn live variable analysis into a real MethodPass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1699 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp b/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp
index 77c8c54..54980d7 100644
--- a/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp
+++ b/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp
@@ -17,18 +17,9 @@
using std::cout;
using std::endl;
-//************************** Constructor/Destructor ***************************
+AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
-
-MethodLiveVarInfo::MethodLiveVarInfo(const Method *const M) : Meth(M) {
- assert(!M->isExternal() && "Cannot be a prototype declaration");
- HasAnalyzed = false; // still we haven't called analyze()
-}
-
-
-
-MethodLiveVarInfo:: ~MethodLiveVarInfo()
-{
+void MethodLiveVarInfo::releaseMemory() {
// First delete all BBLiveVar objects created in constructBBs(). A new object
// of type BBLiveVa is created for every BasicBlock in the method
@@ -36,11 +27,10 @@
//
BBToBBLiveVarMapType::iterator HMI = BB2BBLVMap.begin();
- for( ; HMI != BB2BBLVMap.end() ; HMI ++ ) {
- if( (*HMI).first ) // delete all BBLiveVar in BB2BBLVMap
- delete (*HMI).second;
- }
+ for( ; HMI != BB2BBLVMap.end(); ++HMI)
+ delete HMI->second; // delete all BBLiveVar in BB2BBLVMap
+ BB2BBLVMap.clear();
// Then delete all objects of type LiveVarSet created in calcLiveVarSetsForBB
// and entered into MInst2LVSetBI and MInst2LVSetAI (these are caches
@@ -50,18 +40,16 @@
// hash map iterator for MInst2LVSetBI
//
- MInstToLiveVarSetMapType::iterator MI = MInst2LVSetBI.begin();
+ MInstToLiveVarSetMapType::iterator MI = MInst2LVSetBI.begin();
- for( ; MI != MInst2LVSetBI.end() ; MI ++ ) {
- if( (*MI).first ) // delete all LiveVarSets in MInst2LVSetBI
- delete (*MI).second;
- }
+ for( ; MI != MInst2LVSetBI.end(); ++MI)
+ delete MI->second; // delete all LiveVarSets in MInst2LVSetBI
+
+ MInst2LVSetBI.clear();
+ MInst2LVSetAI.clear();
}
-// ************************* support functions ********************************
-
-
//-----------------------------------------------------------------------------
// constructs BBLiveVars and init Def and In sets
//-----------------------------------------------------------------------------
@@ -154,17 +142,11 @@
//-----------------------------------------------------------------------------
// performs live var anal for a method
//-----------------------------------------------------------------------------
-void MethodLiveVarInfo::analyze()
-{
- // Don't analyze the same method twice!
- // Later, we need to add change notification here.
-
- if (HasAnalyzed)
- return;
-
+bool MethodLiveVarInfo::runOnMethod(Method *M) {
+ Meth = M;
- if( DEBUG_LV) cout << "Analysing live variables ..." << endl;
+ if( DEBUG_LV) cout << "Analysing live variables ...\n";
// create and initialize all the BBLiveVars of the CFG
constructBBs();
@@ -175,9 +157,8 @@
} while (NeedAnotherIteration ); // repeat until we need more iterations
- HasAnalyzed = true; // finished analysing
-
- if( DEBUG_LV) cout << "Live Variable Analysis complete!" << endl;
+ if( DEBUG_LV) cout << "Live Variable Analysis complete!\n";
+ return false;
}