Add CGPassManager.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33309 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2007-01-17 21:45:01 +00:00
parent 44b0d29802
commit 75f9abf517

View File

@ -18,8 +18,132 @@
#include "llvm/CallGraphSCCPass.h"
#include "llvm/Analysis/CallGraph.h"
#include "llvm/ADT/SCCIterator.h"
#include "llvm/PassManagers.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
// CGPassManager
//
/// CGPassManager manages FPPassManagers and CalLGraphSCCPasses.
class CGPassManager : public ModulePass, public PMDataManager {
public:
CGPassManager(int Depth) : PMDataManager(Depth) { }
/// run - Execute all of the passes scheduled for execution. Keep track of
/// whether any of the passes modifies the module, and if so, return true.
bool runOnModule(Module &M);
bool doInitialization(CallGraph &CG);
bool doFinalization(CallGraph &CG);
/// Pass Manager itself does not invalidate any analysis info.
void getAnalysisUsage(AnalysisUsage &Info) const {
// CGPassManager walks SCC and it needs CallGraph.
Info.addRequired<CallGraph>();
Info.setPreservesAll();
}
// Print passes managed by this manager
void dumpPassStructure(unsigned Offset) {
llvm::cerr << std::string(Offset*2, ' ') << "Call Graph SCC Pass Manager\n";
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
Pass *P = getContainedPass(Index);
P->dumpPassStructure(Offset + 1);
dumpLastUses(P, Offset+1);
}
}
Pass *getContainedPass(unsigned N) {
assert ( N < PassVector.size() && "Pass number out of range!");
Pass *FP = static_cast<Pass *>(PassVector[N]);
return FP;
}
virtual PassManagerType getPassManagerType() {
return PMT_CallGraphPassManager;
}
};
/// run - Execute all of the passes scheduled for execution. Keep track of
/// whether any of the passes modifies the module, and if so, return true.
bool CGPassManager::runOnModule(Module &M) {
CallGraph &CG = getAnalysis<CallGraph>();
bool Changed = doInitialization(CG);
std::string Msg1 = "Executing Pass '";
std::string Msg3 = "' Made Modification '";
// Walk SCC
for (scc_iterator<CallGraph*> I = scc_begin(&CG), E = scc_end(&CG);
I != E; ++I) {
// Run all passes on current SCC
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
Pass *P = getContainedPass(Index);
AnalysisUsage AnUsage;
P->getAnalysisUsage(AnUsage);
std::string Msg2 = "' on Call Graph ...\n'";
dumpPassInfo(P, Msg1, Msg2);
dumpAnalysisSetInfo("Required", P, AnUsage.getRequiredSet());
initializeAnalysisImpl(P);
// if (TheTimeInfo) TheTimeInfo->passStarted(P);
if (CallGraphSCCPass *CGSP = dynamic_cast<CallGraphSCCPass *>(P))
Changed |= CGSP->runOnSCC(*I); // TODO : What if CG is changed ?
else {
FPPassManager *FPP = dynamic_cast<FPPassManager *>(P);
assert (FPP && "Invalid CGPassManager member");
// Run pass P on all functions current SCC
std::vector<CallGraphNode*> &SCC = *I;
for (unsigned i = 0, e = SCC.size(); i != e; ++i) {
Function *F = SCC[i]->getFunction();
if (F)
Changed |= FPP->runOnFunction(*F);
}
}
// if (TheTimeInfo) TheTimeInfo->passEnded(MP);
if (Changed)
dumpPassInfo(P, Msg3, Msg2);
dumpAnalysisSetInfo("Preserved", P, AnUsage.getPreservedSet());
removeNotPreservedAnalysis(P);
recordAvailableAnalysis(P);
removeDeadPasses(P, Msg2);
}
}
Changed |= doFinalization(CG);
return Changed;
}
/// Initialize CG
bool CGPassManager::doInitialization(CallGraph &CG) {
bool Changed = false;
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
Pass *P = getContainedPass(Index);
if (CallGraphSCCPass *CGSP = dynamic_cast<CallGraphSCCPass *>(P))
Changed |= CGSP->doInitialization(CG);
}
return Changed;
}
/// Finalize CG
bool CGPassManager::doFinalization(CallGraph &CG) {
bool Changed = false;
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
Pass *P = getContainedPass(Index);
if (CallGraphSCCPass *CGSP = dynamic_cast<CallGraphSCCPass *>(P))
Changed |= CGSP->doFinalization(CG);
}
return Changed;
}
/// getAnalysisUsage - For this class, we declare that we require and preserve
/// the call graph. If the derived class implements this method, it should
/// always explicitly call the implementation here.