6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-17 20:29:31 +00:00
Code Issues Projects Releases Wiki Activity

* Make debugging output nicer

Browse Source 
* Implement pass memory freeing after the pass is unused
* Expose PassManager typedef in Pass.h instead of PassManager.h


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1617 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-01-31 18:32:27 +00:00
parent 65b9709071
commit ce885e9f9d
3 changed files with 175 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
include/llvm/Pass.h
View File

@ -29,6 +29,11 @@ class Pass;
template<class UnitType> class PassManagerT;
struct AnalysisResolver;
// PassManager - Top level PassManagerT instantiation intended to be used.
// Implemented in PassManager.h
typedef PassManagerT<Module> PassManager;
//===----------------------------------------------------------------------===//
// Pass interface - Implemented by all 'passes'. Subclass this if you are an
// interprocedural optimization or you do not fit into any of the more
@ -69,6 +74,19 @@ public:
// By default, no analysis results are used or destroyed.
}
// releaseMemory() - This member can be implemented by a pass if it wants to
// be able to release its memory when it is no longer needed. The default
// behavior of passes is to hold onto memory for the entire duration of their
// lifetime (which is the entire compile time). For pipelined passes, this
// is not a big deal because that memory gets recycled every time the pass is
// invoked on another program unit. For IP passes, it is more important to
// free memory when it is unused.
//
// Optionally implement this function to release pass memory when it is no
// longer used.
//
virtual void releaseMemory() {}
#ifndef NDEBUG
// dumpPassStructure - Implement the -debug-passes=PassStructure option
virtual void dumpPassStructure(unsigned Offset = 0);
@ -89,9 +107,8 @@ private:
friend class PassManagerT<Module>;
friend class PassManagerT<Method>;
friend class PassManagerT<BasicBlock>;
virtual void addToPassManager(PassManagerT<Module> *PM,
AnalysisSet &Destroyed,
AnalysisSet &Provided);
virtual void addToPassManager(PassManagerT<Module> *PM, AnalysisSet &Req,
AnalysisSet &Destroyed, AnalysisSet &Provided);
};
@ -132,10 +149,10 @@ private:
friend class PassManagerT<Module>;
friend class PassManagerT<Method>;
friend class PassManagerT<BasicBlock>;
virtual void addToPassManager(PassManagerT<Module> *PM,AnalysisSet &Destroyed,
AnalysisSet &Provided);
virtual void addToPassManager(PassManagerT<Method> *PM,AnalysisSet &Destroyed,
AnalysisSet &Provided);
virtual void addToPassManager(PassManagerT<Module> *PM, AnalysisSet &Req,
AnalysisSet &Dest, AnalysisSet &Prov);
virtual void addToPassManager(PassManagerT<Method> *PM,AnalysisSet &Req,
AnalysisSet &Dest, AnalysisSet &Prov);
};
@ -169,11 +186,10 @@ struct BasicBlockPass : public MethodPass {
private:
friend class PassManagerT<Method>;
friend class PassManagerT<BasicBlock>;
virtual void addToPassManager(PassManagerT<Method> *PM,AnalysisSet &Destroyed,
AnalysisSet &Provided);
virtual void addToPassManager(PassManagerT<BasicBlock> *PM,
AnalysisSet &Destroyed,
AnalysisSet &Provided);
virtual void addToPassManager(PassManagerT<Method> *PM, AnalysisSet &,
AnalysisSet &, AnalysisSet &);
virtual void addToPassManager(PassManagerT<BasicBlock> *PM, AnalysisSet &,
AnalysisSet &, AnalysisSet &);
};
@ -228,14 +244,16 @@ public:
// is used to pull analysis information out of them.
//
struct AnalysisResolver {
virtual Pass *getAnalysisOrNullUp(AnalysisID ID) = 0;
virtual Pass *getAnalysisOrNullDown(AnalysisID ID) = 0;
virtual Pass *getAnalysisOrNullUp(AnalysisID ID) const = 0;
virtual Pass *getAnalysisOrNullDown(AnalysisID ID) const = 0;
Pass *getAnalysis(AnalysisID ID) {
Pass *Result = getAnalysisOrNullUp(ID);
assert(Result && "Pass has an incorrect analysis uses set!");
return Result;
}
virtual unsigned getDepth() const = 0;
virtual void markPassUsed(AnalysisID P, Pass *User) = 0;
protected:
void setAnalysisResolver(Pass *P, AnalysisResolver *AR);
};

26
lib/VMCore/Pass.cpp
View File

@ -51,7 +51,7 @@ void PMDebug::PrintPassStructure(Pass *P) {
void PMDebug::PrintPassInformation(unsigned Depth, const char *Action,
Pass *P, Value *V) {
if (PassDebugging >= PassExecutions) {
std::cerr << std::string(Depth*2, ' ') << Action << " '"
std::cerr << (void*)P << std::string(Depth*2+1, ' ') << Action << " '"
<< typeid(*P).name();
if (V) {
std::cerr << "' on ";
@ -71,9 +71,9 @@ void PMDebug::PrintPassInformation(unsigned Depth, const char *Action,
}
void PMDebug::PrintAnalysisSetInfo(unsigned Depth, const char *Msg,
const Pass::AnalysisSet &Set) {
Pass *P, const Pass::AnalysisSet &Set) {
if (PassDebugging >= PassDetails && !Set.empty()) {
std::cerr << std::string(Depth*2+2, ' ') << Msg << " Analyses:";
std::cerr << (void*)P << std::string(Depth*2+3, ' ') << Msg << " Analyses:";
for (unsigned i = 0; i < Set.size(); ++i) {
Pass *P = Set[i].createPass(); // Good thing this is just debug code...
std::cerr << " " << typeid(*P).name();
@ -94,9 +94,9 @@ void Pass::dumpPassStructure(unsigned Offset = 0) {
// Pass Implementation
//
void Pass::addToPassManager(PassManagerT<Module> *PM, AnalysisSet &Destroyed,
AnalysisSet &Provided) {
PM->addPass(this, Destroyed, Provided);
void Pass::addToPassManager(PassManagerT<Module> *PM, AnalysisSet &Required,
AnalysisSet &Destroyed, AnalysisSet &Provided) {
PM->addPass(this, Required, Destroyed, Provided);
}
//===----------------------------------------------------------------------===//
@ -126,15 +126,15 @@ bool MethodPass::run(Method *M) {
}
void MethodPass::addToPassManager(PassManagerT<Module> *PM,
AnalysisSet &Destroyed,
AnalysisSet &Required, AnalysisSet &Destroyed,
AnalysisSet &Provided) {
PM->addPass(this, Destroyed, Provided);
PM->addPass(this, Required, Destroyed, Provided);
}
void MethodPass::addToPassManager(PassManagerT<Method> *PM,
AnalysisSet &Destroyed,
AnalysisSet &Required, AnalysisSet &Destroyed,
AnalysisSet &Provided) {
PM->addPass(this, Destroyed, Provided);
PM->addPass(this, Required, Destroyed, Provided);
}
//===----------------------------------------------------------------------===//
@ -160,14 +160,16 @@ bool BasicBlockPass::run(BasicBlock *BB) {
}
void BasicBlockPass::addToPassManager(PassManagerT<Method> *PM,
AnalysisSet &Required,
AnalysisSet &Destroyed,
AnalysisSet &Provided) {
PM->addPass(this, Destroyed, Provided);
PM->addPass(this, Required, Destroyed, Provided);
}
void BasicBlockPass::addToPassManager(PassManagerT<BasicBlock> *PM,
AnalysisSet &Required,
AnalysisSet &Destroyed,
AnalysisSet &Provided) {
PM->addPass(this, Destroyed, Provided);
PM->addPass(this, Required, Destroyed, Provided);
}

184
lib/VMCore/PassManagerT.h
View File

@ -15,10 +15,6 @@
#include "llvm/Pass.h"
#include <string>
// PassManager - Top level PassManagerT instantiation intended to be used.
typedef PassManagerT<Module> PassManager;
//===----------------------------------------------------------------------===//
// PMDebug class - a set of debugging functions that are enabled when compiling
// with -g on. If compiling at -O, all functions are inlined noops.
@ -27,7 +23,7 @@ struct PMDebug {
#ifdef NDEBUG
inline static void PrintPassStructure(Pass *) {}
inline static void PrintPassInformation(unsigned,const char*,Pass*,Value*) {}
inline static void PrintAnalysisSetInfo(unsigned,const char*,
inline static void PrintAnalysisSetInfo(unsigned,const char*,Pass *P,
const Pass::AnalysisSet &) {}
#else
// If compiled in debug mode, these functions can be enabled by setting
@ -35,7 +31,8 @@ struct PMDebug {
//
static void PrintPassStructure(Pass *P);
static void PrintPassInformation(unsigned,const char*,Pass *, Value *);
static void PrintAnalysisSetInfo(unsigned,const char*,const Pass::AnalysisSet&);
static void PrintAnalysisSetInfo(unsigned,const char*,Pass *P,
const Pass::AnalysisSet&);
#endif
};
@ -67,7 +64,7 @@ class PassManagerT : public PassManagerTraits<UnitType>,public AnalysisResolver{
std::vector<PassClass*> Passes; // List of pass's to run
// The parent of this pass manager...
const ParentClass *Parent;
ParentClass * const Parent;
// The current batcher if one is in use, or null
BatcherClass *Batcher;
@ -78,6 +75,12 @@ class PassManagerT : public PassManagerTraits<UnitType>,public AnalysisResolver{
//
std::map<AnalysisID, Pass*> CurrentAnalyses;
// LastUseOf - This map keeps track of the last usage in our pipeline of a
// particular pass. When executing passes, the memory for .first is free'd
// after .second is run.
//
std::map<Pass*, Pass*> LastUseOf;
public:
PassManagerT(ParentClass *Par = 0) : Parent(Par), Batcher(0) {}
~PassManagerT() {
@ -94,6 +97,13 @@ public:
closeBatcher();
CurrentAnalyses.clear();
// LastUserOf - This contains the inverted LastUseOfMap...
std::map<Pass *, std::vector<Pass*> > LastUserOf;
for (std::map<Pass*, Pass*>::iterator I = LastUseOf.begin(),
E = LastUseOf.end(); I != E; ++I)
LastUserOf[I->second].push_back(I->first);
// Output debug information...
if (Parent == 0) PMDebug::PrintPassStructure(this);
@ -107,7 +117,7 @@ public:
std::vector<AnalysisID> Required, Destroyed, Provided;
P->getAnalysisUsageInfo(Required, Destroyed, Provided);
PMDebug::PrintAnalysisSetInfo(getDepth(), "Required", Required);
PMDebug::PrintAnalysisSetInfo(getDepth(), "Required", P, Required);
#ifndef NDEBUG
// All Required analyses should be available to the pass as it runs!
@ -120,8 +130,8 @@ public:
// Run the sub pass!
MadeChanges |= Traits::runPass(P, M);
PMDebug::PrintAnalysisSetInfo(getDepth(), "Destroyed", Destroyed);
PMDebug::PrintAnalysisSetInfo(getDepth(), "Provided", Provided);
PMDebug::PrintAnalysisSetInfo(getDepth(), "Destroyed", P, Destroyed);
PMDebug::PrintAnalysisSetInfo(getDepth(), "Provided", P, Provided);
// Erase all analyses in the destroyed set...
for (Pass::AnalysisSet::iterator I = Destroyed.begin(),
@ -132,14 +142,91 @@ public:
for (Pass::AnalysisSet::iterator I = Provided.begin(),
E = Provided.end(); I != E; ++I)
CurrentAnalyses[*I] = P;
// Free memory for any passes that we are the last use of...
std::vector<Pass*> &DeadPass = LastUserOf[P];
for (std::vector<Pass*>::iterator I = DeadPass.begin(),E = DeadPass.end();
I != E; ++I) {
PMDebug::PrintPassInformation(getDepth()+1, "Freeing Pass", *I,
(Value*)M);
(*I)->releaseMemory();
}
}
return MadeChanges;
}
#ifndef NDEBUG
// dumpPassStructure - Implement the -debug-passes=PassStructure option
virtual void dumpPassStructure(unsigned Offset = 0) {
std::cerr << std::string(Offset*2, ' ') << Traits::getPMName()
<< " Pass Manager\n";
for (std::vector<PassClass*>::iterator I = Passes.begin(), E = Passes.end();
I != E; ++I) {
PassClass *P = *I;
P->dumpPassStructure(Offset+1);
// Loop through and see which classes are destroyed after this one...
for (std::map<Pass*, Pass*>::iterator I = LastUseOf.begin(),
E = LastUseOf.end(); I != E; ++I) {
if (P == I->second) {
std::cerr << "Fr" << std::string(Offset*2, ' ');
I->first->dumpPassStructure(0);
}
}
}
}
#endif
Pass *getAnalysisOrNullDown(AnalysisID ID) const {
std::map<AnalysisID, Pass*>::const_iterator I = CurrentAnalyses.find(ID);
if (I == CurrentAnalyses.end()) {
if (Batcher)
return ((AnalysisResolver*)Batcher)->getAnalysisOrNullDown(ID);
return 0;
}
return I->second;
}
Pass *getAnalysisOrNullUp(AnalysisID ID) const {
std::map<AnalysisID, Pass*>::const_iterator I = CurrentAnalyses.find(ID);
if (I == CurrentAnalyses.end()) {
if (Parent)
return Parent->getAnalysisOrNullUp(ID);
return 0;
}
return I->second;
}
// markPassUsed - Inform higher level pass managers (and ourselves)
// that these analyses are being used by this pass. This is used to
// make sure that analyses are not free'd before we have to use
// them...
//
void markPassUsed(AnalysisID P, Pass *User) {
std::map<AnalysisID, Pass*>::iterator I = CurrentAnalyses.find(P);
if (I != CurrentAnalyses.end()) {
LastUseOf[I->second] = User; // Local pass, extend the lifetime
} else {
// Pass not in current available set, must be a higher level pass
// available to us, propogate to parent pass manager... We tell the
// parent that we (the passmanager) are using the analysis so that it
// frees the analysis AFTER this pass manager runs.
//
assert(Parent != 0 && "Pass available but not found!");
Parent->markPassUsed(P, this);
}
}
// Return the number of parent PassManagers that exist
virtual unsigned getDepth() const {
if (Parent == 0) return 0;
return 1 + Parent->getDepth();
}
// add - Add a pass to the queue of passes to run. This passes ownership of
// the Pass to the PassManager. When the PassManager is destroyed, the pass
// will be destroyed as well, so there is no need to delete the pass. Also,
// all passes MUST be new'd.
// will be destroyed as well, so there is no need to delete the pass. This
// implies that all passes MUST be new'd.
//
void add(PassClass *P) {
// Get information about what analyses the pass uses...
@ -157,43 +244,7 @@ public:
// depends on the class of the pass, and is critical to laying out passes in
// an optimal order..
//
P->addToPassManager(this, Destroyed, Provided);
}
#ifndef NDEBUG
// dumpPassStructure - Implement the -debug-passes=PassStructure option
virtual void dumpPassStructure(unsigned Offset = 0) {
std::cerr << std::string(Offset*2, ' ') << "Pass Manager\n";
for (std::vector<PassClass*>::iterator I = Passes.begin(), E = Passes.end();
I != E; ++I)
(*I)->dumpPassStructure(Offset+1);
}
#endif
public:
Pass *getAnalysisOrNullDown(AnalysisID ID) {
std::map<AnalysisID, Pass*>::iterator I = CurrentAnalyses.find(ID);
if (I == CurrentAnalyses.end()) {
if (Batcher)
return ((AnalysisResolver*)Batcher)->getAnalysisOrNullDown(ID);
return 0;
}
return I->second;
}
Pass *getAnalysisOrNullUp(AnalysisID ID) {
std::map<AnalysisID, Pass*>::iterator I = CurrentAnalyses.find(ID);
if (I == CurrentAnalyses.end()) {
if (Parent)
return ((AnalysisResolver*)Parent)->getAnalysisOrNullUp(ID);
return 0;
}
return I->second;
}
virtual unsigned getDepth() const {
if (Parent == 0) return 0;
return 1 + ((AnalysisResolver*)Parent)->getDepth();
P->addToPassManager(this, Required, Destroyed, Provided);
}
private:
@ -208,8 +259,8 @@ private:
// add the pass to the end of the pass list and terminate any accumulation of
// MethodPasses that are present.
//
void addPass(PassClass *P, Pass::AnalysisSet &Destroyed,
Pass::AnalysisSet &Provided) {
void addPass(PassClass *P, Pass::AnalysisSet &Required,
Pass::AnalysisSet &Destroyed, Pass::AnalysisSet &Provided) {
// Providers are analysis classes which are forbidden to modify the module
// they are operating on, so they are allowed to be reordered to before the
// batcher...
@ -223,6 +274,14 @@ private:
setAnalysisResolver(P, this);
Passes.push_back(P);
// Inform higher level pass managers (and ourselves) that these analyses are
// being used by this pass. This is used to make sure that analyses are not
// free'd before we have to use them...
//
for (std::vector<AnalysisID>::iterator I = Required.begin(),
E = Required.end(); I != E; ++I)
markPassUsed(*I, P); // Mark *I as used by P
// Erase all analyses in the destroyed set...
for (std::vector<AnalysisID>::iterator I = Destroyed.begin(),
E = Destroyed.end(); I != E; ++I)
@ -232,18 +291,21 @@ private:
for (std::vector<AnalysisID>::iterator I = Provided.begin(),
E = Provided.end(); I != E; ++I)
CurrentAnalyses[*I] = P;
// For now assume that our results are never used...
LastUseOf[P] = P;
}
// For MethodPass subclasses, we must be sure to batch the MethodPasses
// together in a MethodPassBatcher object so that all of the analyses are run
// together a method at a time.
//
void addPass(SubPassClass *MP, Pass::AnalysisSet &Destroyed,
Pass::AnalysisSet &Provided) {
void addPass(SubPassClass *MP, Pass::AnalysisSet &Required,
Pass::AnalysisSet &Destroyed, Pass::AnalysisSet &Provided) {
if (Batcher == 0) // If we don't have a batcher yet, make one now.
Batcher = new BatcherClass(this);
// The Batcher will queue them passes up
MP->addToPassManager(Batcher, Destroyed, Provided);
MP->addToPassManager(Batcher, Required, Destroyed, Provided);
}
// closeBatcher - Terminate the batcher that is being worked on.
@ -291,6 +353,10 @@ template<> struct PassManagerTraits<BasicBlock> : public BasicBlockPass {
return P->runOnBasicBlock(M);
}
// getPMName() - Return the name of the unit the PassManager operates on for
// debugging.
const char *getPMName() const { return "BasicBlock"; }
// Implement the BasicBlockPass interface...
virtual bool doInitialization(Module *M);
virtual bool runOnBasicBlock(BasicBlock *BB);
@ -326,6 +392,10 @@ template<> struct PassManagerTraits<Method> : public MethodPass {
return P->runOnMethod(M);
}
// getPMName() - Return the name of the unit the PassManager operates on for
// debugging.
const char *getPMName() const { return "Method"; }
// Implement the MethodPass interface...
virtual bool doInitialization(Module *M);
virtual bool runOnMethod(Method *M);
@ -350,11 +420,15 @@ template<> struct PassManagerTraits<Module> : public Pass {
typedef PassManagerT<Method> BatcherClass;
// ParentClass - The type of the parent PassManager...
typedef void ParentClass;
typedef AnalysisResolver ParentClass;
// runPass - Specify how the pass should be run on the UnitType
static bool runPass(PassClass *P, Module *M) { return P->run(M); }
// getPMName() - Return the name of the unit the PassManager operates on for
// debugging.
const char *getPMName() const { return "Module"; }
// run - Implement the Pass interface...
virtual bool run(Module *M) {
return ((PassManagerT<Module>*)this)->runOnUnit(M);