//===----------------------------------------------------------------------===//
#include "llvm/Analysis/LoopPass.h"
+#include "llvm/DebugInfoProbe.h"
+#include "llvm/Assembly/PrintModulePass.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Timer.h"
using namespace llvm;
+namespace {
+
+/// PrintLoopPass - Print a Function corresponding to a Loop.
+///
+class PrintLoopPass : public LoopPass {
+private:
+ std::string Banner;
+ raw_ostream &Out; // raw_ostream to print on.
+
+public:
+ static char ID;
+ PrintLoopPass(const std::string &B, raw_ostream &o)
+ : LoopPass(ID), Banner(B), Out(o) {}
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ }
+
+ bool runOnLoop(Loop *L, LPPassManager &) {
+ Out << Banner;
+ for (Loop::block_iterator b = L->block_begin(), be = L->block_end();
+ b != be;
+ ++b) {
+ (*b)->print(Out);
+ }
+ return false;
+ }
+};
+
+char PrintLoopPass::ID = 0;
+}
+
+//===----------------------------------------------------------------------===//
+// DebugInfoProbe
+
+static DebugInfoProbeInfo *TheDebugProbe;
+static void createDebugInfoProbe() {
+ if (TheDebugProbe) return;
+
+ // Constructed the first time this is called. This guarantees that the
+ // object will be constructed, if -enable-debug-info-probe is set,
+ // before static globals, thus it will be destroyed before them.
+ static ManagedStatic<DebugInfoProbeInfo> DIP;
+ TheDebugProbe = &*DIP;
+}
+
//===----------------------------------------------------------------------===//
// LPPassManager
//
char LPPassManager::ID = 0;
-/// LPPassManager manages FPPassManagers and CalLGraphSCCPasses.
LPPassManager::LPPassManager(int Depth)
- : FunctionPass(&ID), PMDataManager(Depth) {
+ : FunctionPass(ID), PMDataManager(Depth) {
skipThisLoop = false;
redoThisLoop = false;
LI = NULL;
else
LI->addTopLevelLoop(L);
+ insertLoopIntoQueue(L);
+}
+
+void LPPassManager::insertLoopIntoQueue(Loop *L) {
// Insert L into loop queue
if (L == CurrentLoop)
redoLoop(L);
- else if (!ParentLoop)
+ else if (!L->getParentLoop())
// This is top level loop.
LQ.push_front(L);
else {
- // Insert L after ParentLoop
+ // Insert L after the parent loop.
for (std::deque<Loop *>::iterator I = LQ.begin(),
E = LQ.end(); I != E; ++I) {
- if (*I == ParentLoop) {
+ if (*I == L->getParentLoop()) {
// deque does not support insert after.
++I;
LQ.insert(I, 1, L);
void LPPassManager::cloneBasicBlockSimpleAnalysis(BasicBlock *From,
BasicBlock *To, Loop *L) {
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
- Pass *P = getContainedPass(Index);
- LoopPass *LP = dynamic_cast<LoopPass *>(P);
+ LoopPass *LP = getContainedPass(Index);
LP->cloneBasicBlockAnalysis(From, To, L);
}
}
/// deleteSimpleAnalysisValue - Invoke deleteAnalysisValue hook for all passes.
void LPPassManager::deleteSimpleAnalysisValue(Value *V, Loop *L) {
+ if (BasicBlock *BB = dyn_cast<BasicBlock>(V)) {
+ for (BasicBlock::iterator BI = BB->begin(), BE = BB->end(); BI != BE;
+ ++BI) {
+ Instruction &I = *BI;
+ deleteSimpleAnalysisValue(&I, L);
+ }
+ }
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
- Pass *P = getContainedPass(Index);
- LoopPass *LP = dynamic_cast<LoopPass *>(P);
+ LoopPass *LP = getContainedPass(Index);
LP->deleteAnalysisValue(V, L);
}
}
bool LPPassManager::runOnFunction(Function &F) {
LI = &getAnalysis<LoopInfo>();
bool Changed = false;
+ createDebugInfoProbe();
// Collect inherited analysis from Module level pass manager.
populateInheritedAnalysis(TPM->activeStack);
for (LoopInfo::iterator I = LI->begin(), E = LI->end(); I != E; ++I)
addLoopIntoQueue(*I, LQ);
+ if (LQ.empty()) // No loops, skip calling finalizers
+ return false;
+
// Initialization
for (std::deque<Loop *>::const_iterator I = LQ.begin(), E = LQ.end();
I != E; ++I) {
Loop *L = *I;
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
- Pass *P = getContainedPass(Index);
- LoopPass *LP = dynamic_cast<LoopPass *>(P);
- if (LP)
- Changed |= LP->doInitialization(L, *this);
+ LoopPass *P = getContainedPass(Index);
+ Changed |= P->doInitialization(L, *this);
}
}
skipThisLoop = false;
redoThisLoop = false;
- // Run all passes on current SCC
+ // Run all passes on the current Loop.
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
- Pass *P = getContainedPass(Index);
-
- dumpPassInfo(P, EXECUTION_MSG, ON_LOOP_MSG, "");
+ LoopPass *P = getContainedPass(Index);
+ dumpPassInfo(P, EXECUTION_MSG, ON_LOOP_MSG,
+ CurrentLoop->getHeader()->getName());
dumpRequiredSet(P);
initializeAnalysisImpl(P);
-
- LoopPass *LP = dynamic_cast<LoopPass *>(P);
+ if (TheDebugProbe)
+ TheDebugProbe->initialize(P, F);
{
- PassManagerPrettyStackEntry X(LP, *CurrentLoop->getHeader());
- StartPassTimer(P);
- assert(LP && "Invalid LPPassManager member");
- Changed |= LP->runOnLoop(CurrentLoop, *this);
- StopPassTimer(P);
+ PassManagerPrettyStackEntry X(P, *CurrentLoop->getHeader());
+ TimeRegion PassTimer(getPassTimer(P));
+
+ Changed |= P->runOnLoop(CurrentLoop, *this);
}
+ if (TheDebugProbe)
+ TheDebugProbe->finalize(P, F);
if (Changed)
- dumpPassInfo(P, MODIFICATION_MSG, ON_LOOP_MSG, "");
+ dumpPassInfo(P, MODIFICATION_MSG, ON_LOOP_MSG,
+ skipThisLoop ? "<deleted>" :
+ CurrentLoop->getHeader()->getName());
dumpPreservedSet(P);
- verifyPreservedAnalysis(LP);
+ if (!skipThisLoop) {
+ // Manually check that this loop is still healthy. This is done
+ // instead of relying on LoopInfo::verifyLoop since LoopInfo
+ // is a function pass and it's really expensive to verify every
+ // loop in the function every time. That level of checking can be
+ // enabled with the -verify-loop-info option.
+ {
+ TimeRegion PassTimer(getPassTimer(LI));
+ CurrentLoop->verifyLoop();
+ }
+
+ // Then call the regular verifyAnalysis functions.
+ verifyPreservedAnalysis(P);
+ }
+
removeNotPreservedAnalysis(P);
recordAvailableAnalysis(P);
- removeDeadPasses(P, "", ON_LOOP_MSG);
-
- // If dominator information is available then verify the info if requested.
- verifyDomInfo(*LP, F);
+ removeDeadPasses(P,
+ skipThisLoop ? "<deleted>" :
+ CurrentLoop->getHeader()->getName(),
+ ON_LOOP_MSG);
if (skipThisLoop)
// Do not run other passes on this loop.
break;
}
+ // If the loop was deleted, release all the loop passes. This frees up
+ // some memory, and avoids trouble with the pass manager trying to call
+ // verifyAnalysis on them.
+ if (skipThisLoop)
+ for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
+ Pass *P = getContainedPass(Index);
+ freePass(P, "<deleted>", ON_LOOP_MSG);
+ }
+
// Pop the loop from queue after running all passes.
LQ.pop_back();
// Finalization
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
- Pass *P = getContainedPass(Index);
- LoopPass *LP = dynamic_cast <LoopPass *>(P);
- if (LP)
- Changed |= LP->doFinalization();
+ LoopPass *P = getContainedPass(Index);
+ Changed |= P->doFinalization();
}
return Changed;
/// Print passes managed by this manager
void LPPassManager::dumpPassStructure(unsigned Offset) {
- llvm::cerr << std::string(Offset*2, ' ') << "Loop Pass Manager\n";
+ errs().indent(Offset*2) << "Loop Pass Manager\n";
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
Pass *P = getContainedPass(Index);
P->dumpPassStructure(Offset + 1);
//===----------------------------------------------------------------------===//
// LoopPass
+Pass *LoopPass::createPrinterPass(raw_ostream &O,
+ const std::string &Banner) const {
+ return new PrintLoopPass(Banner, O);
+}
+
// Check if this pass is suitable for the current LPPassManager, if
// available. This pass P is not suitable for a LPPassManager if P
// is not preserving higher level analysis info used by other
PMS.top()->getPassManagerType() > PMT_LoopPassManager)
PMS.pop();
- LPPassManager *LPPM = dynamic_cast<LPPassManager *>(PMS.top());
-
// If this pass is destroying high level information that is used
// by other passes that are managed by LPM then do not insert
// this pass in current LPM. Use new LPPassManager.
- if (LPPM && !LPPM->preserveHigherLevelAnalysis(this))
+ if (PMS.top()->getPassManagerType() == PMT_LoopPassManager &&
+ !PMS.top()->preserveHigherLevelAnalysis(this))
PMS.pop();
}
PMS.top()->getPassManagerType() > PMT_LoopPassManager)
PMS.pop();
- LPPassManager *LPPM = dynamic_cast<LPPassManager *>(PMS.top());
-
- // Create new Loop Pass Manager if it does not exist.
- if (!LPPM) {
-
+ LPPassManager *LPPM;
+ if (PMS.top()->getPassManagerType() == PMT_LoopPassManager)
+ LPPM = (LPPassManager*)PMS.top();
+ else {
+ // Create new Loop Pass Manager if it does not exist.
assert (!PMS.empty() && "Unable to create Loop Pass Manager");
PMDataManager *PMD = PMS.top();
// [3] Assign manager to manage this new manager. This may create
// and push new managers into PMS
- Pass *P = dynamic_cast<Pass *>(LPPM);
+ Pass *P = LPPM->getAsPass();
TPM->schedulePass(P);
// [4] Push new manager into PMS
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